pike.git/src/language.yacc:662dda5badbd9770282772ed9c4fd684ff1ca3e2

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5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064 5065 5066 5067 5068 5069 5070 5071 5072 5073 5074 /* -*- c -*- || This file is part of Pike. For copyright information see COPYRIGHT. || Pike is distributed under GPL, LGPL and MPL. See the file COPYING || for more information. */ %pure-parser /* Expect a single shift/reduce conflict (dangling else). */ %expect 1 %token TOK_ARROW /* * Basic value pushing */ %token TOK_CONSTANT TOK_FLOAT TOK_STRING %token TOK_NUMBER /* * These are the predefined functions that can be accessed from Pike. */ %token TOK_INC TOK_DEC %token TOK_RETURN %token TOK_EQ TOK_GE TOK_LE TOK_NE %token TOK_NOT %token TOK_LSH TOK_RSH %token TOK_LAND TOK_LOR %token TOK_SWITCH TOK_SSCANF TOK_CATCH %token TOK_FOREACH /* This is the end of file marker used by the lexer * to enable nicer EOF in error handling. */ %token TOK_LEX_EOF %token TOK_ADD_EQ %token TOK_AND_EQ %token TOK_ARRAY_ID %token TOK_ATTRIBUTE_ID %token TOK_BREAK %token TOK_CASE %token TOK_CLASS %token TOK_COLON_COLON %token TOK_CONTINUE %token TOK_DEFAULT %token TOK_DEPRECATED_ID %token TOK_DIV_EQ %token TOK_DO %token TOK_DOT_DOT %token TOK_DOT_DOT_DOT %token TOK_ELSE %token TOK_ENUM %token TOK_EXTERN %token TOK_FLOAT_ID %token TOK_FOR %token TOK_FUNCTION_ID %token TOK_GAUGE %token TOK_GLOBAL %token TOK_IDENTIFIER %token TOK_RESERVED %token TOK_IF %token TOK_IMPORT %token TOK_INHERIT %token TOK_INLINE %token TOK_LOCAL_ID %token TOK_FINAL_ID %token TOK_FUNCTION_NAME %token TOK_INT_ID %token TOK_LAMBDA %token TOK_MULTISET_ID %token TOK_MULTISET_END %token TOK_MULTISET_START %token TOK_LSH_EQ %token TOK_MAPPING_ID %token TOK_MIXED_ID %token TOK_MOD_EQ %token TOK_MULT_EQ %token TOK_OBJECT_ID %token TOK_OR_EQ %token TOK_POW %token TOK_POW_EQ %token TOK_PRIVATE %token TOK_PROGRAM_ID %token TOK_PROTECTED %token TOK_PREDEF %token TOK_PUBLIC %token TOK_RSH_EQ %token TOK_STATIC %token TOK_STRING_ID %token TOK_SUB_EQ %token TOK_TYPEDEF %token TOK_TYPEOF %token TOK_VARIANT %token TOK_VERSION %token TOK_VOID_ID %token TOK_WEAK %token TOK_WHILE %token TOK_XOR_EQ %token TOK_OPTIONAL %token TOK_SAFE_INDEX %token TOK_SAFE_START_INDEX %token TOK_BITS %token TOK_AUTO_ID %right '=' %right '?' %left TOK_LOR %left TOK_LAND %left '|' %left '^' %left '&' %left TOK_EQ TOK_NE %left '>' TOK_GE '<' TOK_LE /* nonassoc? */ %left TOK_LSH TOK_RSH %left '+' '-' %left '*' '%' '/' %right TOK_NOT '~' %right TOK_POW %nonassoc TOK_INC TOK_DEC %{ /* This is the grammar definition of Pike. */ #include "global.h" #ifdef HAVE_MEMORY_H #include <memory.h> #endif #include "interpret.h" #include "array.h" #include "object.h" #include "mapping.h" #include "stralloc.h" #include "las.h" #include "interpret.h" #include "program.h" #include "pike_types.h" #include "constants.h" #include "pike_macros.h" #include "pike_error.h" #include "docode.h" #include "pike_embed.h" #include "opcodes.h" #include "operators.h" #include "bignum.h" #define YYMAXDEPTH 1000 #ifdef PIKE_DEBUG #ifndef YYDEBUG /* May also be defined by machine.h */ #define YYDEBUG 1 #endif /* YYDEBUG */ #endif /* Get verbose parse error reporting. */ #define YYERROR_VERBOSE 1 /* #define LAMBDA_DEBUG 1 */ static void yyerror_reserved(const char *keyword); static struct pike_string *get_new_name(struct pike_string *prefix); int add_local_name(struct pike_string *, struct pike_type *, node *); int low_add_local_name(struct compiler_frame *, struct pike_string *, struct pike_type *, node *); static void mark_lvalues_as_used(node *n); static node *lexical_islocal(struct pike_string *); static node *safe_inc_enum(node *n); static node *find_versioned_identifier(struct pike_string *identifier, int major, int minor); static int call_handle_import(struct pike_string *s); static void update_current_type(); static int inherit_depth; static struct program_state *inherit_state = NULL; /* * Kludge for Bison not using prototypes. */ #ifndef __GNUC__ #ifndef __cplusplus static void __yy_memcpy(char *to, YY_FROM_CONST char *from, YY_COUNT_TYPE count); #endif /* !__cplusplus */ #endif /* !__GNUC__ */ %} %union { int number; FLOAT_TYPE fnum; struct node_s *n; char *str; void *ptr; } %{ /* Need to be included after YYSTYPE is defined. */ #define INCLUDED_FROM_LANGUAGE_YACC #include "lex.h" #include "pike_compiler.h" %} %{ /* Include <stdio.h> our selves, so that we can do our magic * without being disturbed... */ #include <stdio.h> int yylex(YYSTYPE *yylval); /* Bison is stupid, and tries to optimize for space... */ #ifdef YYBISON #define short int #endif /* YYBISON */ %} %type <fnum> TOK_FLOAT %type <number> TOK_ARRAY_ID %type <number> TOK_BREAK %type <number> TOK_CASE %type <number> TOK_CATCH %type <number> TOK_CONTINUE %type <number> TOK_DEFAULT %type <number> TOK_DO %type <number> TOK_ELSE %type <number> TOK_FLOAT_ID %type <number> TOK_FOR %type <number> TOK_FOREACH %type <number> TOK_FUNCTION_ID %type <number> TOK_GAUGE %type <number> TOK_IF %type <number> TOK_INHERIT %type <number> TOK_INLINE %type <number> TOK_INT_ID %type <number> TOK_LAMBDA %type <number> TOK_LOCAL_ID %type <number> TOK_MAPPING_ID %type <number> TOK_MIXED_ID %type <number> TOK_MULTISET_ID %type <number> TOK_OBJECT_ID %type <number> TOK_PREDEF %type <number> TOK_PRIVATE %type <number> TOK_PROGRAM_ID %type <number> TOK_PROTECTED %type <number> TOK_PUBLIC %type <number> TOK_RETURN %type <number> TOK_SSCANF %type <number> TOK_STATIC %type <number> TOK_STRING_ID %type <number> TOK_AUTO_ID %type <number> TOK_SWITCH %type <number> TOK_VOID_ID %type <number> TOK_WHILE %type <number> arguments %type <number> arguments2 %type <number> func_args %type <number> create_arguments %type <number> create_arguments2 %type <number> create_arg %type <number> assign %type <number> modifier %type <number> modifier_list %type <number> modifiers %type <number> implicit_modifiers %type <number> inherit_specifier %type <number> function_type_list %type <number> function_type_list2 %type <number> optional_dot_dot_dot %type <number> optional_comma %type <number> optional_constant %type <number> optional_create_arguments %type <number> save_block_level %type <number> save_locals %type <str> magic_identifiers %type <str> magic_identifiers1 %type <str> magic_identifiers2 %type <str> magic_identifiers3 /* The following symbols return type information */ %type <n> number_or_minint %type <n> number_or_maxint %type <n> cast %type <n> soft_cast %type <n> real_string_constant %type <n> real_string_or_identifier %type <n> string_constant %type <n> string_or_identifier %type <n> string_segment %type <n> string %type <n> TOK_STRING %type <n> TOK_NUMBER %type <n> TOK_BITS %type <n> optional_rename_inherit %type <n> optional_identifier %type <n> implicit_identifier %type <n> TOK_IDENTIFIER %type <n> TOK_RESERVED %type <n> TOK_VERSION %type <n> attribute %type <n> assoc_pair %type <n> line_number_info %type <n> block %type <n> optional_block %type <n> failsafe_block %type <n> open_paren_with_line_info %type <n> close_paren_or_missing %type <n> open_bracket_with_line_info %type <n> block_or_semi %type <n> break %type <n> case %type <n> catch %type <n> catch_arg %type <n> anon_class %type <n> named_class %type <n> enum %type <n> enum_value %type <n> safe_comma_expr %type <n> comma_expr %type <n> comma_expr2 %type <n> range_bound %type <n> cond %type <n> continue %type <n> default %type <n> do %type <n> safe_expr0 %type <n> splice_expr %type <n> expr01 %type <n> expr1 %type <n> expr2 %type <n> expr3 expr0 %type <n> apply %type <n> expr4 %type <n> expr5 %type <n> expr_list %type <n> expr_list2 %type <n> for %type <n> for_expr %type <n> foreach %type <n> gauge %type <n> idents %type <n> idents2 %type <n> labeled_statement %type <n> lambda %type <n> literal_expr %type <n> local_name_list %type <n> low_idents %type <n> safe_lvalue %type <n> lvalue %type <n> lvalue_list %type <n> low_lvalue_list %type <n> m_expr_list %type <n> m_expr_list2 %type <n> new_local_name %type <n> normal_label_statement %type <n> optional_else_part %type <n> optional_label %type <n> propagated_enum_value %type <n> return %type <n> sscanf %type <n> statement %type <n> statements %type <n> statement_with_semicolon %type <n> switch %type <n> typeof %type <n> unused %type <n> unused2 %type <n> while %type <n> optional_comma_expr %type <n> low_program_ref %type <n> inherit_ref %type <n> local_function %type <n> magic_identifier %type <n> simple_identifier %type <n> foreach_lvalues %type <n> foreach_optional_lvalue %type <ptr> start_function %type <ptr> start_lambda %% all: program { YYACCEPT; } | program TOK_LEX_EOF { YYACCEPT; } /* | error TOK_LEX_EOF { YYABORT; } */ ; program: program def | program ';' | /* empty */ ; real_string_or_identifier: TOK_IDENTIFIER | real_string_constant ; optional_rename_inherit: ':' real_string_or_identifier { $$=$2; } | ':' bad_identifier { $$=0; } | ':' error { $$=0; } | { $$=0; } ; /* NOTE: This rule pushes a string "name" on the stack in addition * to resolving the program reference. */ low_program_ref: string_constant { STACK_LEVEL_START(0); ref_push_string($1->u.sval.u.string); if (call_handle_inherit($1->u.sval.u.string)) { STACK_LEVEL_CHECK(2); $$=mksvaluenode(Pike_sp-1); pop_stack(); } else $$=mknewintnode(0); STACK_LEVEL_CHECK(1); if($$->name) free_string($$->name); #ifdef PIKE_DEBUG if (TYPEOF(Pike_sp[-1]) != T_STRING) { Pike_fatal("Compiler lost track of program name.\n"); } #endif /* PIKE_DEBUG */ /* FIXME: Why not use $1->u.sval.u.string here? */ add_ref( $$->name=Pike_sp[-1].u.string ); free_node($1); STACK_LEVEL_DONE(1); } | idents { STACK_LEVEL_START(0); if(Pike_compiler->last_identifier) { ref_push_string(Pike_compiler->last_identifier); }else{ push_empty_string(); } $$=$1; STACK_LEVEL_DONE(1); } ; /* NOTE: Pushes the resolved program on the stack. */ program_ref: low_program_ref { STACK_LEVEL_START(0); resolv_program($1); free_node($1); STACK_LEVEL_DONE(1); } ; inherit_ref: { SET_FORCE_RESOLVE($<number>$); } low_program_ref { UNSET_FORCE_RESOLVE($<number>1); $$ = $2; } ; inheritance: modifiers TOK_INHERIT inherit_ref optional_rename_inherit ';' { if (($1 & ID_EXTERN) && (Pike_compiler->compiler_pass == 1)) { yywarning("Extern declared inherit."); } if($3) { struct pike_string *s=Pike_sp[-1].u.string; if($4) s=$4->u.sval.u.string; compiler_do_inherit($3,$1,s); } if($4) free_node($4); pop_stack(); if ($3) free_node($3); } | modifiers TOK_INHERIT inherit_ref error ';' { if ($3) free_node($3); pop_stack(); yyerrok; } | modifiers TOK_INHERIT inherit_ref error TOK_LEX_EOF { if ($3) free_node($3); pop_stack(); yyerror("Missing ';'."); yyerror("Unexpected end of file."); } | modifiers TOK_INHERIT inherit_ref error '}' { if ($3) free_node($3); pop_stack(); yyerror("Missing ';'."); } | modifiers TOK_INHERIT error ';' { yyerrok; } | modifiers TOK_INHERIT error TOK_LEX_EOF { yyerror("Missing ';'."); yyerror("Unexpected end of file."); } | modifiers TOK_INHERIT error '}' { yyerror("Missing ';'."); } ; import: TOK_IMPORT idents ';' { resolv_constant($2); free_node($2); use_module(Pike_sp-1); pop_stack(); } | TOK_IMPORT string ';' { if (call_handle_import($2->u.sval.u.string)) { use_module(Pike_sp-1); pop_stack(); } free_node($2); } | TOK_IMPORT error ';' { yyerrok; } | TOK_IMPORT error TOK_LEX_EOF { yyerror("Missing ';'."); yyerror("Unexpected end of file."); } | TOK_IMPORT error '}' { yyerror("Missing ';'."); } ; constant_name: TOK_IDENTIFIER '=' safe_expr0 { /* This can be made more lenient in the future */ /* Ugly hack to make sure that $3 is optimized */ { int tmp=Pike_compiler->compiler_pass; $3=mknode(F_COMMA_EXPR,$3,0); Pike_compiler->compiler_pass=tmp; } if (Pike_compiler->current_modifiers & ID_EXTERN) { int depth = 0; struct program_state *state = Pike_compiler; node *n = $3; while (((n->token == F_COMMA_EXPR) || (n->token == F_ARG_LIST)) && ((!CAR(n)) ^ (!CDR(n)))) { if (CAR(n)) n = CAR(n); else n = CDR(n); } if (n->token == F_EXTERNAL) { while (state && (state->new_program->id != n->u.integer.a)) { depth++; state = state->previous; } } if (depth && state) { /* Alias for a symbol in a surrounding scope. */ int id = really_low_reference_inherited_identifier(state, 0, n->u.integer.b); define_alias($1->u.sval.u.string, n->type, Pike_compiler->current_modifiers & ~ID_EXTERN, depth, id); } else if (Pike_compiler->compiler_pass == 1) { yyerror("Invalid extern declared constant."); add_constant($1->u.sval.u.string, &svalue_undefined, Pike_compiler->current_modifiers & ~ID_EXTERN); } } else { if(!is_const($3)) { if (Pike_compiler->compiler_pass == 2) { yyerror("Constant definition is not constant."); } add_constant($1->u.sval.u.string, 0, Pike_compiler->current_modifiers & ~ID_EXTERN); } else { if(!Pike_compiler->num_parse_error) { ptrdiff_t tmp=eval_low($3,1); if(tmp < 1) { yyerror("Error in constant definition."); push_undefined(); }else{ pop_n_elems((INT32)(tmp - 1)); } } else { push_undefined(); } add_constant($1->u.sval.u.string, Pike_sp-1, Pike_compiler->current_modifiers & ~ID_EXTERN); pop_stack(); } } const_def_ok: if($3) free_node($3); free_node($1); } | bad_identifier '=' safe_expr0 { if ($3) free_node($3); } | error '=' safe_expr0 { if ($3) free_node($3); } ; constant_list: constant_name | constant_list ',' constant_name ; constant: modifiers TOK_CONSTANT constant_list ';' {} | modifiers TOK_CONSTANT error ';' { yyerrok; } | modifiers TOK_CONSTANT error TOK_LEX_EOF { yyerror("Missing ';'."); yyerror("Unexpected end of file."); } | modifiers TOK_CONSTANT error '}' { yyerror("Missing ';'."); } ; block_or_semi: block { $$ = mknode(F_COMMA_EXPR,$1,mknode(F_RETURN,mkintnode(0),0)); COPY_LINE_NUMBER_INFO($$, $1); } | ';' { $$ = NULL; } | TOK_LEX_EOF { yyerror("Expected ';'."); $$ = NULL; } | error { $$ = NULL; } ; open_paren_with_line_info: '(' { /* Used to hold line-number info */ $$ = mkintnode(0); } ; close_paren_or_missing: ')' { /* Used to hold line-number info */ $$ = mkintnode(0); } | /* empty */ { yyerror("Missing ')'."); /* Used to hold line-number info */ $$ = mkintnode(0); } ; close_brace_or_missing: '}' | /* empty */ { yyerror("Missing '}'."); } ; close_brace_or_eof: '}' | TOK_LEX_EOF { yyerror("Missing '}'."); } ; open_bracket_with_line_info: '[' { /* Used to hold line-number info */ $$ = mkintnode(0); } ; close_bracket_or_missing: ']' | /* empty */ { yyerror("Missing ']'."); } ; /* This variant is used to start a new compiler frame for functions * with a declared return type. * * On entry the return type to be is taken from * * compiler_frame->current_type * * in the current frame (stored there eg via simple_type). This is * then copied to * * compiler_frame->current_return_type * * for the new frame. */ start_function: /* empty */ { push_compiler_frame(SCOPE_LOCAL); if(!Pike_compiler->compiler_frame->previous || !Pike_compiler->compiler_frame->previous->current_type) { yyerror("Internal compiler error (start_function)."); copy_pike_type(Pike_compiler->compiler_frame->current_return_type, mixed_type_string); }else{ copy_pike_type(Pike_compiler->compiler_frame->current_return_type, Pike_compiler->compiler_frame->previous->current_type); } $$ = Pike_compiler->compiler_frame; } ; optional_constant: /* empty */ { $$ = OPT_EXTERNAL_DEPEND|OPT_SIDE_EFFECT; } | TOK_CONSTANT { $$ = 0; } ; def: modifiers optional_attributes simple_type optional_constant TOK_IDENTIFIER start_function '(' { $<number>$ = 0; /* Check for the (very special) case of create and create_args. */ if (Pike_compiler->num_create_args) { struct pike_string *create_string = NULL; int e; MAKE_CONST_STRING(create_string, "create"); if ($5->u.sval.u.string == create_string) { /* Prepend the create arguments. */ if (Pike_compiler->num_create_args < 0) { Pike_compiler->varargs = 1; for (e = 0; e < -Pike_compiler->num_create_args; e++) { struct identifier *id = Pike_compiler->new_program->identifiers + e; add_ref(id->type); add_local_name(empty_pike_string, id->type, 0); /* Note: add_local_name() above will return e. */ Pike_compiler->compiler_frame->variable[e].flags |= LOCAL_VAR_IS_USED; } } else { for (e = 0; e < Pike_compiler->num_create_args; e++) { struct identifier *id = Pike_compiler->new_program->identifiers + e; add_ref(id->type); add_local_name(empty_pike_string, id->type, 0); /* Note: add_local_name() above will return e. */ Pike_compiler->compiler_frame->variable[e].flags |= LOCAL_VAR_IS_USED; } } $<number>$ = e; } } } arguments close_paren_or_missing { int e; /* Adjust opt_flags in case we've got an optional_constant. */ Pike_compiler->compiler_frame->opt_flags = $4; /* construct the function type */ push_finished_type(Pike_compiler->compiler_frame->current_return_type); e = $<number>8 + $9 - 1; if(Pike_compiler->varargs && (!$<number>8 || (Pike_compiler->num_create_args >= 0))) { push_finished_type(Pike_compiler->compiler_frame->variable[e].type); e--; pop_type_stack(T_ARRAY); }else{ push_type(T_VOID); } push_type(T_MANY); for(; e>=0; e--) { push_finished_type(Pike_compiler->compiler_frame->variable[e].type); push_type(T_FUNCTION); } if (Pike_compiler->current_attributes) { node *n = Pike_compiler->current_attributes; while (n) { push_type_attribute(CDR(n)->u.sval.u.string); n = CAR(n); } } { struct pike_type *s=compiler_pop_type(); int i = isidentifier($5->u.sval.u.string); if (Pike_compiler->compiler_pass != 1) { if (i < 0) { my_yyerror("Identifier %S lost after first pass.", $5->u.sval.u.string); } } $<n>$ = mktypenode(s); free_type(s); } /* if(Pike_compiler->compiler_pass==1) */ { /* FIXME: * set current_function_number for local functions as well */ Pike_compiler->compiler_frame->current_function_number= define_function($5->u.sval.u.string, $<n>$->u.sval.u.type, $1 & (~ID_EXTERN), IDENTIFIER_PIKE_FUNCTION | (Pike_compiler->varargs?IDENTIFIER_VARARGS:0), 0, $4); Pike_compiler->varargs=0; } } block_or_semi { int e; if($12) { int f; node *check_args = NULL; struct compilation *c = THIS_COMPILATION; struct pike_string *save_file = c->lex.current_file; int save_line = c->lex.current_line; int num_required_args = 0; struct identifier *i; c->lex.current_file = $5->current_file; c->lex.current_line = $5->line_number; if (($1 & ID_EXTERN) && (Pike_compiler->compiler_pass == 1)) { yywarning("Extern declared function definition."); } for(e=0; e<$<number>8+$9; e++) { if((e >= $<number>8) && (!Pike_compiler->compiler_frame->variable[e].name || !Pike_compiler->compiler_frame->variable[e].name->len)) { my_yyerror("Missing name for argument %d.", e - $<number>8); } else { if (Pike_compiler->compiler_pass == 2) { /* FIXME: Should probably use some other flag. */ if ((runtime_options & RUNTIME_CHECK_TYPES) && (Pike_compiler->compiler_frame->variable[e].type != mixed_type_string)) { node *local_node; /* fprintf(stderr, "Creating soft cast node for local #%d\n", e);*/ local_node = mkcastnode(mixed_type_string, mklocalnode(e, 0)); /* NOTE: The cast to mixed above is needed to avoid generating * compilation errors, as well as avoiding optimizations * in mksoftcastnode(). */ check_args = mknode(F_COMMA_EXPR, check_args, mksoftcastnode(Pike_compiler->compiler_frame->variable[e].type, local_node)); } } } } if ($<number>8) { /* Hook in the initializers for the create arguments. */ for (e = $<number>8; e--;) { $12 = mknode(F_COMMA_EXPR, mknode(F_POP_VALUE, mknode(F_ASSIGN, mkidentifiernode(e), mklocalnode(e, 0)), NULL), $12); } } { int l = $12->line_number; struct pike_string *f = $12->current_file; if (check_args) { /* Prepend the arg checking code. */ $12 = mknode(F_COMMA_EXPR, mknode(F_POP_VALUE, check_args, NULL), $12); } c->lex.current_line = l; c->lex.current_file = f; } f=dooptcode($5->u.sval.u.string, $12, $<n>11->u.sval.u.type, $1); i = ID_FROM_INT(Pike_compiler->new_program, f); i->opt_flags = Pike_compiler->compiler_frame->opt_flags; if (Pike_compiler->compiler_pass == 2 && Pike_compiler->compiler_frame->current_return_type->type == PIKE_T_AUTO) { /* Change "auto" return type to actual return type. */ push_finished_type(Pike_compiler->compiler_frame->current_return_type->car); e = $<number>8 + $9 - 1; if(Pike_compiler->varargs && (!$<number>8 || (Pike_compiler->num_create_args >= 0))) { push_finished_type(Pike_compiler->compiler_frame->variable[e].type); e--; pop_type_stack(T_ARRAY); }else{ push_type(T_VOID); } push_type(T_MANY); for(; e>=0; e--) { push_finished_type(Pike_compiler->compiler_frame->variable[e].type); push_type(T_FUNCTION); } if (Pike_compiler->current_attributes) { node *n = Pike_compiler->current_attributes; while (n) { push_type_attribute(CDR(n)->u.sval.u.string); n = CAR(n); } } free_type( i->type ); i->type = compiler_pop_type(); } #ifdef PIKE_DEBUG if(Pike_interpreter.recoveries && ((Pike_sp - Pike_interpreter.evaluator_stack) < Pike_interpreter.recoveries->stack_pointer)) Pike_fatal("Stack error (underflow)\n"); if((Pike_compiler->compiler_pass == 1) && (f != Pike_compiler->compiler_frame->current_function_number)) { fprintf(stderr, "define_function()/do_opt_code() failed for symbol %s\n", $5->u.sval.u.string->str); dump_program_desc(Pike_compiler->new_program); Pike_fatal("define_function screwed up! %d != %d\n", f, Pike_compiler->compiler_frame->current_function_number); } #endif c->lex.current_line = save_line; c->lex.current_file = save_file; } else { /* Prototype; don't warn about unused arguments. */ for (e = Pike_compiler->compiler_frame->current_number_of_locals; e--;) { Pike_compiler->compiler_frame->variable[e].flags |= LOCAL_VAR_IS_USED; } if( Pike_compiler->compiler_frame->current_return_type->type == PIKE_T_AUTO ) yyerror("'auto' return type not allowed for prototypes\n"); } #ifdef PIKE_DEBUG if (Pike_compiler->compiler_frame != $6) { Pike_fatal("Lost track of compiler_frame!\n" " Got: %p (Expected: %p) Previous: %p\n", Pike_compiler->compiler_frame, $6, Pike_compiler->compiler_frame->previous); } #endif pop_compiler_frame(); free_node($5); free_node($10); free_node($<n>11); } | modifiers optional_attributes simple_type optional_constant TOK_IDENTIFIER start_function error { #ifdef PIKE_DEBUG if (Pike_compiler->compiler_frame != $6) { Pike_fatal("Lost track of compiler_frame!\n" " Got: %p (Expected: %p) Previous: %p\n", Pike_compiler->compiler_frame, $6, Pike_compiler->compiler_frame->previous); } #endif pop_compiler_frame(); free_node($5); } | modifiers optional_attributes simple_type optional_constant bad_identifier { compiler_discard_type(); } '(' arguments ')' block_or_semi { if ($10) free_node($10); } | modifiers optional_attributes simple_type optional_constant name_list ';' | inheritance {} | import {} | constant {} | modifiers named_class { free_node($2); } | modifiers enum { free_node($2); } | typedef {} | error TOK_LEX_EOF { reset_type_stack(); yyerror("Missing ';'."); yyerror("Unexpected end of file"); } | error ';' { reset_type_stack(); yyerrok; /* if(Pike_compiler->num_parse_error>5) YYACCEPT; */ } | error '}' { reset_type_stack(); yyerror("Missing ';'."); /* yychar = '}'; */ /* Put the '}' back on the input stream */ } | modifiers '{' { $<number>$=THIS_COMPILATION->lex.pragmas; THIS_COMPILATION->lex.pragmas|=$1; } program close_brace_or_eof { THIS_COMPILATION->lex.pragmas=$<number>3; } ; optional_dot_dot_dot: TOK_DOT_DOT_DOT { $$=1; } | TOK_DOT_DOT { yyerror("Range indicator ('..') where elipsis ('...') expected."); $$=1; } | /* empty */ { $$=0; } ; optional_identifier: TOK_IDENTIFIER | bad_identifier { $$=0; } | /* empty */ { $$=0; } ; new_arg_name: full_type optional_dot_dot_dot optional_identifier { int i; if(Pike_compiler->varargs) yyerror("Can't define more arguments after ..."); if($2) { push_type(T_ARRAY); Pike_compiler->varargs=1; } if(!$3) { $3=mkstrnode(empty_pike_string); } if($3->u.sval.u.string->len && islocal($3->u.sval.u.string) >= 0) my_yyerror("Variable %S appears twice in argument list.", $3->u.sval.u.string); i = add_local_name($3->u.sval.u.string, compiler_pop_type(),0); if (i >= 0) { /* Don't warn about unused arguments. */ Pike_compiler->compiler_frame->variable[i].flags |= LOCAL_VAR_IS_USED; } free_node($3); } ; func_args: '(' arguments close_paren_or_missing { free_node($3); $$=$2; } ; arguments: /* empty */ optional_comma { $$=0; } | arguments2 optional_comma ; arguments2: new_arg_name { $$ = 1; } | arguments2 ',' new_arg_name { $$ = $1 + 1; } | arguments2 ':' new_arg_name { yyerror("Unexpected ':' in argument list."); $$ = $1 + 1; } ; modifier: TOK_FINAL_ID { $$ = ID_FINAL | ID_INLINE; } | TOK_STATIC { $$ = ID_PROTECTED; if( !(THIS_COMPILATION->lex.pragmas & ID_NO_DEPRECATION_WARNINGS) && !TEST_COMPAT(7, 8) && Pike_compiler->compiler_pass==1 ) yywarning("Keyword static is deprecated in favour of 'protected'."); } | TOK_EXTERN { $$ = ID_EXTERN; } | TOK_OPTIONAL { $$ = ID_OPTIONAL; } | TOK_PRIVATE { $$ = ID_PRIVATE | ID_PROTECTED; } | TOK_LOCAL_ID { $$ = ID_INLINE; } | TOK_PUBLIC { $$ = ID_PUBLIC; } | TOK_PROTECTED { $$ = ID_PROTECTED; } | TOK_INLINE { $$ = ID_INLINE; } | TOK_VARIANT { $$ = ID_VARIANT; } | TOK_WEAK { $$ = ID_WEAK; } ; magic_identifiers1: TOK_FINAL_ID { $$ = "final"; } | TOK_STATIC { $$ = "static"; } | TOK_EXTERN { $$ = "extern"; } | TOK_PRIVATE { $$ = "private"; } | TOK_LOCAL_ID { $$ = "local"; } | TOK_PUBLIC { $$ = "public"; } | TOK_PROTECTED { $$ = "protected"; } | TOK_INLINE { $$ = "inline"; } | TOK_OPTIONAL { $$ = "optional"; } | TOK_VARIANT { $$ = "variant"; } | TOK_WEAK { $$ = "__weak__"; } ; magic_identifiers2: TOK_VOID_ID { $$ = "void"; } | TOK_MIXED_ID { $$ = "mixed"; } | TOK_ARRAY_ID { $$ = "array"; } | TOK_ATTRIBUTE_ID { $$ = "__attribute__"; } | TOK_DEPRECATED_ID { $$ = "__deprecated__"; } | TOK_MAPPING_ID { $$ = "mapping"; } | TOK_MULTISET_ID { $$ = "multiset"; } | TOK_OBJECT_ID { $$ = "object"; } | TOK_FUNCTION_ID { $$ = "function"; } | TOK_FUNCTION_NAME { $$ = "__func__"; } | TOK_PROGRAM_ID { $$ = "program"; } | TOK_STRING_ID { $$ = "string"; } | TOK_FLOAT_ID { $$ = "float"; } | TOK_INT_ID { $$ = "int"; } | TOK_ENUM { $$ = "enum"; } | TOK_TYPEDEF { $$ = "typedef"; } /* | TOK_AUTO_ID { $$ = "auto"; } */ ; magic_identifiers3: TOK_IF { $$ = "if"; } | TOK_DO { $$ = "do"; } | TOK_FOR { $$ = "for"; } | TOK_WHILE { $$ = "while"; } | TOK_ELSE { $$ = "else"; } | TOK_FOREACH { $$ = "foreach"; } | TOK_CATCH { $$ = "catch"; } | TOK_GAUGE { $$ = "gauge"; } | TOK_CLASS { $$ = "class"; } | TOK_BREAK { $$ = "break"; } | TOK_CASE { $$ = "case"; } | TOK_CONSTANT { $$ = "constant"; } | TOK_CONTINUE { $$ = "continue"; } | TOK_DEFAULT { $$ = "default"; } | TOK_IMPORT { $$ = "import"; } | TOK_INHERIT { $$ = "inherit"; } | TOK_LAMBDA { $$ = "lambda"; } | TOK_PREDEF { $$ = "predef"; } | TOK_RETURN { $$ = "return"; } | TOK_SSCANF { $$ = "sscanf"; } | TOK_SWITCH { $$ = "switch"; } | TOK_TYPEOF { $$ = "typeof"; } | TOK_GLOBAL { $$ = "global"; } ; magic_identifiers: magic_identifiers1 | magic_identifiers2 | magic_identifiers3 ; magic_identifier: TOK_IDENTIFIER | TOK_RESERVED | magic_identifiers { struct pike_string *tmp=make_shared_string($1); $$=mkstrnode(tmp); free_string(tmp); } ; modifiers: modifier_list { $$=Pike_compiler->current_modifiers=$1 | (THIS_COMPILATION->lex.pragmas & ID_MODIFIER_MASK); } ; modifier_list: /* empty */ { $$ = 0; } | modifier_list modifier { $$ = $1 | $2; } ; attribute: TOK_ATTRIBUTE_ID '(' string_constant optional_comma ')' { $$ = $3; } | TOK_DEPRECATED_ID '(' ')' { struct pike_string *deprecated_string; MAKE_CONST_STRING(deprecated_string, "deprecated"); $$ = mkstrnode(deprecated_string); } | TOK_DEPRECATED_ID { struct pike_string *deprecated_string; MAKE_CONST_STRING(deprecated_string, "deprecated"); $$ = mkstrnode(deprecated_string); } ; optional_attributes: /* empty */ { if (Pike_compiler->current_attributes) { free_node(Pike_compiler->current_attributes); } if ((Pike_compiler->current_attributes = THIS_COMPILATION->lex.attributes)) { add_ref(Pike_compiler->current_attributes); } } | optional_attributes attribute { if ($2) { Pike_compiler->current_attributes = mknode(F_ARG_LIST, Pike_compiler->current_attributes, $2); } } ; cast: open_paren_with_line_info type ')' { struct pike_type *s = compiler_pop_type(); $$ = mktypenode(s); free_type(s); COPY_LINE_NUMBER_INFO($$, $1); free_node ($1); } ; soft_cast: open_bracket_with_line_info type ']' { struct pike_type *s = compiler_pop_type(); $$ = mktypenode(s); free_type(s); COPY_LINE_NUMBER_INFO($$, $1); free_node ($1); } ; /* Either a basic_type-prefixed expression, or an identifier type. * Value on type stack. */ type2: type | identifier_type ; /* Full type expression. * Value moved to compiler_frame->current_type. */ simple_type: full_type { update_current_type(); } ; /* Basic_type-prefixed expression or an identifier type. * Value moved to compiler_frame->current_type. */ simple_type2: type2 { update_current_type(); } ; /* Full type expression. Value on type stack. * Typically used in contexts where there must be a type, * and expressions are invalid. */ full_type: full_type '|' type3 { push_type(T_OR); } | type3 ; /* Basic_type-prefixed expression. Value on type stack. * Typically used in contexts where expressions are valid. */ type: type '|' type3 { push_type(T_OR); } | basic_type ; /* Either a basic_type or an identifier type. Value on type stack. */ type3: basic_type | identifier_type ; /* Literal type. Value on type stack. */ basic_type: TOK_FLOAT_ID { push_type(T_FLOAT); } | TOK_VOID_ID { push_type(T_VOID); } | TOK_MIXED_ID { push_type(T_MIXED); } | TOK_AUTO_ID { push_type(T_ZERO); push_type(PIKE_T_AUTO); } | TOK_STRING_ID opt_string_width {} | TOK_INT_ID opt_int_range {} | TOK_MAPPING_ID opt_mapping_type {} | TOK_FUNCTION_ID opt_function_type {} | TOK_OBJECT_ID opt_object_type {} | TOK_PROGRAM_ID opt_program_type { push_type(T_PROGRAM); } | TOK_ARRAY_ID opt_array_type { push_type(T_ARRAY); } | TOK_MULTISET_ID opt_array_type { push_type(T_MULTISET); } | TOK_ATTRIBUTE_ID '(' string_constant ',' full_type ')' { push_type_attribute($3->u.sval.u.string); free_node($3); } | TOK_ATTRIBUTE_ID '(' string_constant error ')' { push_type(T_MIXED); push_type_attribute($3->u.sval.u.string); free_node($3); } | TOK_ATTRIBUTE_ID error { push_type(T_MIXED); } | TOK_DEPRECATED_ID '(' full_type ')' { struct pike_string *deprecated_string; MAKE_CONST_STRING(deprecated_string, "deprecated"); push_type_attribute(deprecated_string); } | TOK_DEPRECATED_ID '(' error ')' { struct pike_string *deprecated_string; MAKE_CONST_STRING(deprecated_string, "deprecated"); push_type(T_MIXED); push_type_attribute(deprecated_string); } ; /* Identifier type. Value on type stack. */ identifier_type: idents { if ($1) { fix_type_field($1); if (!pike_types_le($1->type, typeable_type_string) && (THIS_COMPILATION->lex.pragmas & ID_STRICT_TYPES)) { yytype_report(REPORT_WARNING, $1->current_file, $1->line_number, typeable_type_string, $1->current_file, $1->line_number, $1->type, 0, "Invalid type."); } } resolv_constant($1); if (TYPEOF(Pike_sp[-1]) == T_TYPE) { /* "typedef" */ push_finished_type(Pike_sp[-1].u.type); } else { /* object type */ struct program *p = NULL; if (TYPEOF(Pike_sp[-1]) == T_OBJECT) { if(!(p = Pike_sp[-1].u.object->prog)) { pop_stack(); push_int(0); yyerror("Destructed object used as program identifier."); }else{ int f = FIND_LFUN(p->inherits[SUBTYPEOF(Pike_sp[-1])].prog, LFUN_CALL); if(f!=-1) { SET_SVAL_SUBTYPE(Pike_sp[-1], f + p->inherits[SUBTYPEOF(Pike_sp[-1])]. identifier_level); SET_SVAL_TYPE(Pike_sp[-1], T_FUNCTION); }else{ extern void f_object_program(INT32); if (Pike_compiler->compiler_pass == 2) yywarning("Using object as program identifier."); f_object_program(1); } } } switch(TYPEOF(Pike_sp[-1])) { case T_FUNCTION: if((p = program_from_function(Pike_sp-1))) { push_object_type(0, p?(p->id):0); break; } else { /* Attempt to get the return type for the function. */ struct pike_type *a, *b; a = get_type_of_svalue(Pike_sp-1); /* Note: check_splice_call() below eats a reference from a. * Note: CALL_INHIBIT_WARNINGS is needed since we don't * provide a function name (and we don't want * warnings here anyway). */ a = check_splice_call(NULL, a, 0, mixed_type_string, NULL, CALL_INHIBIT_WARNINGS); if (a) { b = new_get_return_type(a, 0); free_type(a); if (b) { push_finished_type(b); free_type(b); break; } } } /* FALL_THROUGH */ default: if (Pike_compiler->compiler_pass!=1) my_yyerror("Illegal program identifier: %O.", Pike_sp-1); pop_stack(); push_int(0); push_object_type(0, 0); break; case T_PROGRAM: p = Pike_sp[-1].u.program; push_object_type(0, p?(p->id):0); break; } } /* Attempt to name the type. */ if (Pike_compiler->last_identifier) { push_type_name(Pike_compiler->last_identifier); } pop_stack(); free_node($1); } | typeof { if ($1) { push_finished_type($1->u.sval.u.type); free_node($1); } else { push_finished_type(mixed_type_string); } } ; number_or_maxint: /* Empty */ { $$ = mkintnode(MAX_INT_TYPE); } | TOK_NUMBER | '-' TOK_NUMBER { #ifdef PIKE_DEBUG if (($2->token != F_CONSTANT) || (TYPEOF($2->u.sval) != T_INT)) { Pike_fatal("Unexpected number in negative int-range.\n"); } #endif /* PIKE_DEBUG */ $$ = mkintnode(-($2->u.sval.u.integer)); free_node($2); } ; number_or_minint: /* Empty */ { $$ = mkintnode(MIN_INT_TYPE); } | TOK_NUMBER | '-' TOK_NUMBER { #ifdef PIKE_DEBUG if (($2->token != F_CONSTANT) || (TYPEOF($2->u.sval) != T_INT)) { Pike_fatal("Unexpected number in negative int-range.\n"); } #endif /* PIKE_DEBUG */ $$ = mkintnode(-($2->u.sval.u.integer)); free_node($2); } ; expected_dot_dot: TOK_DOT_DOT | TOK_DOT_DOT_DOT { yyerror("Elipsis ('...') where range indicator ('..') expected."); } ; opt_int_range: /* Empty */ { push_int_type(MIN_INT_TYPE, MAX_INT_TYPE); } | '(' TOK_BITS ')' { push_int_type( 0, (1<<$2->u.sval.u.integer)-1 ); free_node( $2 ); } | '(' number_or_minint expected_dot_dot number_or_maxint ')' { INT_TYPE min = MIN_INT_TYPE; INT_TYPE max = MAX_INT_TYPE; /* FIXME: Check that $4 is >= $2. */ if($4->token == F_CONSTANT) { if (TYPEOF($4->u.sval) == T_INT) { max = $4->u.sval.u.integer; } else if (is_bignum_object_in_svalue(&$4->u.sval)) { push_int(0); if (is_lt(&$4->u.sval, Pike_sp-1)) { max = MIN_INT_TYPE; } pop_stack(); } } if($2->token == F_CONSTANT) { if (TYPEOF($2->u.sval) == T_INT) { min = $2->u.sval.u.integer; } else if (is_bignum_object_in_svalue(&$2->u.sval)) { push_int(0); if (is_lt(Pike_sp-1, &$2->u.sval)) { min = MAX_INT_TYPE; } pop_stack(); } } push_int_type(min, max); free_node($2); free_node($4); } | '(' error ')' { push_int_type(MIN_INT32, MAX_INT32); yyerror("Expected integer range."); } ; opt_string_width: opt_int_range { push_type(T_STRING); } ; opt_object_type: /* Empty */ { push_object_type(0, 0); } | { #ifdef PIKE_DEBUG $<ptr>$ = Pike_sp; #endif /* PIKE_DEBUG */ } '(' program_ref ')' { /* NOTE: On entry, there are two items on the stack: * Pike_sp-2: Name of the program reference (string). * Pike_sp-1: The resolved program (program|function|zero). */ struct program *p=program_from_svalue(Pike_sp-1); #ifdef PIKE_DEBUG if ($<ptr>1 != (Pike_sp - 2)) { Pike_fatal("Unexpected stack depth: %p != %p\n", $<n>1, Pike_sp-2); } #endif /* PIKE_DEBUG */ if(!p) { if (Pike_compiler->compiler_pass!=1) { my_yyerror("Not a valid program specifier: %S", Pike_sp[-2].u.string); } } push_object_type(0, p?(p->id):0); /* Attempt to name the type. */ if (TYPEOF(Pike_sp[-2]) == T_STRING) { push_type_name(Pike_sp[-2].u.string); } pop_n_elems(2); } ; opt_program_type: /* Empty */ { push_object_type(0, 0); } | '(' full_type ')' | '(' error ')' { push_object_type(0, 0); yyerror("Invalid program subtype."); } ; opt_function_type: '(' { type_stack_mark(); } function_type_list optional_dot_dot_dot ':' { /* Add the many type if there is none. */ if ($4) { if (!$3) { /* function_type_list ends with a comma, or is empty. * FIXME: Should this be a syntax error or not? */ if (Pike_compiler->compiler_pass == 1) { yyerror("Missing type before ... ."); } push_type(T_MIXED); } }else{ push_type(T_VOID); } } full_type ')' { push_reverse_type(T_MANY); Pike_compiler->pike_type_mark_stackp--; while (*Pike_compiler->pike_type_mark_stackp+1 < Pike_compiler->type_stackp) { push_reverse_type(T_FUNCTION); } } | /* empty */ { push_type(T_MIXED); push_type(T_VOID); push_type(T_OR); push_type(T_ZERO); push_type(T_VOID); push_type(T_OR); push_type(T_MANY); } ; function_type_list: /* Empty */ optional_comma { $$=0; } | function_type_list2 optional_comma { $$=!$2; } ; function_type_list2: full_type { $$=1; } | function_type_list2 ',' { } full_type ; opt_array_type: '(' full_type ')' | { push_type(T_MIXED); } ; opt_mapping_type: '(' { } full_type ':' { } full_type { push_reverse_type(T_MAPPING); } ')' | /* empty */ { push_type(T_MIXED); push_type(T_MIXED); push_type(T_MAPPING); } ; name_list: new_name | name_list ',' new_name ; new_name: TOK_IDENTIFIER { struct pike_type *type; node *n; push_finished_type(Pike_compiler->compiler_frame->current_type); n = Pike_compiler->current_attributes; while(n) { push_type_attribute(CDR(n)->u.sval.u.string); n = CAR(n); } type=compiler_pop_type(); define_variable($1->u.sval.u.string, type, Pike_compiler->current_modifiers); free_type(type); free_node($1); } | bad_identifier {} | TOK_IDENTIFIER '=' { struct pike_type *type; node *n; push_finished_type(Pike_compiler->compiler_frame->current_type); n = Pike_compiler->current_attributes; while(n) { push_type_attribute(CDR(n)->u.sval.u.string); n = CAR(n); } type=compiler_pop_type(); if ((Pike_compiler->current_modifiers & ID_EXTERN) && (Pike_compiler->compiler_pass == 1)) { yywarning("Extern declared variable has initializer."); } $<number>$=define_variable($1->u.sval.u.string, type, Pike_compiler->current_modifiers & (~ID_EXTERN)); free_type(type); } expr0 { if ((Pike_compiler->compiler_pass == 2) && !TEST_COMPAT(7, 8) && ($4) && ($4->token == F_CONSTANT) && !Pike_compiler->num_parse_error) { /* Check if it is zero, in which case we can throw it away. * * NB: The compat test is due to that this changes the semantics * of calling __INIT() by hand. */ if ((TYPEOF($4->u.sval) == PIKE_T_INT) && !SUBTYPEOF($4->u.sval) && !$4->u.sval.u.integer && !IDENTIFIER_IS_ALIAS(ID_FROM_INT(Pike_compiler->new_program, $<number>3)->identifier_flags)) { /* NB: Inherited variables get converted into aliases by * define_variable, and we need to support clearing * of inherited variables. */ #ifdef PIKE_DEBUG if (l_flag > 5) { fprintf(stderr, "Ignoring initialization to zero for variable %s.\n", $1->u.sval.u.string->str); } #endif /* PIKE_DEBUG */ if(Pike_compiler->compiler_frame->current_type->type == PIKE_T_AUTO) { // auto variable type needs to be updated. fix_type_field( $4 ); fix_auto_variable_type( $<number>3, $4->type ); } free_node($4); $4 = NULL; } } if ($4) { // this is done in both passes to get somewhat better handling // of auto types. // // an example is: auto a = typeof(b); auto b = (["foo":"bar"]); // if this is only done in the second pass the type of a will be // type(auto), not type(mapping(..)) if( Pike_compiler->compiler_frame->current_type->type == PIKE_T_AUTO ) { fix_type_field( $4 ); fix_auto_variable_type( $<number>3, $4->type ); } Pike_compiler->init_node=mknode(F_COMMA_EXPR,Pike_compiler->init_node, mkcastnode(void_type_string, mknode(F_ASSIGN, mkidentifiernode($<number>3), $4))); } free_node($1); } | TOK_IDENTIFIER '=' error { free_node($1); } | TOK_IDENTIFIER '=' TOK_LEX_EOF { yyerror("Unexpected end of file in variable definition."); free_node($1); } | bad_identifier '=' expr0 { free_node($3); } ; /* Type at compiler_frame->current_type. */ new_local_name: TOK_IDENTIFIER { int id; struct pike_type *type; copy_pike_type(type, Pike_compiler->compiler_frame->current_type); id = add_local_name($1->u.sval.u.string, type, 0); if( type->type == PIKE_T_AUTO ) { /* FIXME: Update type on assign instead! */ yyerror("auto only valid when the variable is assigned in definition."); } if (id >= 0) { /* FIXME: Consider using mklocalnode(id, -1). */ $$=mknode(F_ASSIGN, mklocalnode(id,0), mkintnode(0)); } else $$ = 0; free_node($1); } | bad_identifier { $$=0; } | TOK_IDENTIFIER '=' { push_finished_type(Pike_compiler->compiler_frame->current_type); type_stack_mark(); } expr0 { int id; struct pike_type *type; pop_stack_mark(); update_current_type(); copy_pike_type(type, Pike_compiler->compiler_frame->current_type); if( type->type == PIKE_T_AUTO && Pike_compiler->compiler_pass == 2) { free_type( type ); fix_type_field( $4 ); copy_pike_type( type, $4->type ); } id = add_local_name($1->u.sval.u.string, type, 0); if (id >= 0) { if (!(THIS_COMPILATION->lex.pragmas & ID_STRICT_TYPES)) { /* Only warn about unused initialized variables in strict types mode. */ Pike_compiler->compiler_frame->variable[id].flags |= LOCAL_VAR_IS_USED; } $$=mknode(F_ASSIGN, mklocalnode(id,0), $4); } else $$ = 0; free_node($1); } | bad_identifier '=' { push_finished_type(Pike_compiler->compiler_frame->current_type); type_stack_mark(); } expr0 { pop_stack_mark(); update_current_type(); free_node($4); $$=0; } | TOK_IDENTIFIER '=' { push_finished_type(Pike_compiler->compiler_frame->current_type); type_stack_mark(); } error { pop_stack_mark(); update_current_type(); free_node($1); /* No yyerok here since we aren't done yet. */ $$=0; } | TOK_IDENTIFIER '=' { push_finished_type(Pike_compiler->compiler_frame->current_type); type_stack_mark(); } TOK_LEX_EOF { pop_stack_mark(); update_current_type(); yyerror("Unexpected end of file in local variable definition."); free_node($1); /* No yyerok here since we aren't done yet. */ $$=0; } ; line_number_info: /* empty */ { /* Used to hold line-number info */ $$ = mkintnode(0); } ; block:'{' { $<number>1=Pike_compiler->num_used_modules; $<number>$=Pike_compiler->compiler_frame->current_number_of_locals; } line_number_info { /* Trick to store more than one number on compiler stack - Hubbe */ $<number>$=Pike_compiler->compiler_frame->last_block_level; if($<number>$ == -1) /* if 'first block' */ Pike_compiler->compiler_frame->last_block_level=0; /* all variables */ else Pike_compiler->compiler_frame->last_block_level=$<number>2; } statements end_block { unuse_modules(Pike_compiler->num_used_modules - $<number>1); $5 = pop_local_variables($<number>2, $5); Pike_compiler->compiler_frame->last_block_level=$<number>4; if ($5) COPY_LINE_NUMBER_INFO($5, $3); free_node ($3); $$=$5; } ; /* Node with line number info at $0. */ end_block: '}' | TOK_LEX_EOF { yyerror("Missing '}'."); if ($<n>0) { low_yyreport(REPORT_ERROR, $<n>0->current_file, $<n>0->line_number, parser_system_string, 0, "Opening '{' was here."); } yyerror("Unexpected end of file."); } ; failsafe_block: block | error { $$=0; } | TOK_LEX_EOF { yyerror("Unexpected end of file."); $$=0; } ; /* Type at compiler_frame->current_type. */ local_name_list: new_local_name | local_name_list ',' new_local_name { $$ = mknode(F_COMMA_EXPR, mkcastnode(void_type_string, $1), $3); } ; local_constant_name: TOK_IDENTIFIER '=' safe_expr0 { struct pike_type *type; /* Ugly hack to make sure that $3 is optimized */ { int tmp=Pike_compiler->compiler_pass; $3=mknode(F_COMMA_EXPR,$3,0); optimize_node($3); Pike_compiler->compiler_pass=tmp; type=$3->u.node.a->type; } if(!is_const($3)) { if(Pike_compiler->compiler_pass==2) yyerror("Constant definition is not constant."); }else{ ptrdiff_t tmp=eval_low($3,1); if(tmp < 1) { yyerror("Error in constant definition."); }else{ pop_n_elems((INT32)(tmp - 1)); if($3) free_node($3); $3=mksvaluenode(Pike_sp-1); type=$3->type; pop_stack(); } } if(!type) type = mixed_type_string; add_ref(type); low_add_local_name(Pike_compiler->compiler_frame, /*->previous,*/ $1->u.sval.u.string, type, $3); /* Note: Intentionally not marked as used. */ free_node($1); } | bad_identifier '=' safe_expr0 { if ($3) free_node($3); } | error '=' safe_expr0 { if ($3) free_node($3); } ; local_constant_list: local_constant_name | local_constant_list ',' local_constant_name ; local_constant: TOK_CONSTANT local_constant_list ';' | TOK_CONSTANT error ';' { yyerrok; } | TOK_CONSTANT error TOK_LEX_EOF { yyerror("Missing ';'."); yyerror("Unexpected end of file."); } | TOK_CONSTANT error '}' { yyerror("Missing ';'."); } ; statements: { $$=0; } | statements statement { $$ = mknode(F_COMMA_EXPR, $1, mkcastnode(void_type_string, $2)); } ; statement_with_semicolon: unused2 expected_semicolon ; normal_label_statement: statement_with_semicolon | import { $$=0; } | cond | return | local_constant { $$=0; } | block | break expected_semicolon | continue expected_semicolon | error ';' { reset_type_stack(); $$=0; yyerrok; } | error TOK_LEX_EOF { reset_type_stack(); yyerror("Missing ';'."); yyerror("Unexpected end of file."); $$=0; } | error '}' { reset_type_stack(); yyerror("Missing ';'."); /* yychar = '}'; */ /* Put the '}' back on the input stream. */ $$=0; } | ';' { $$=0; } ; statement: normal_label_statement { Pike_compiler->compiler_frame->opt_flags &= ~OPT_CUSTOM_LABELS; } | while | do | for | foreach | switch | case | default | labeled_statement | simple_type2 local_function { $$=mkcastnode(void_type_string, $2); } | implicit_modifiers named_class { $$=mkcastnode(void_type_string, $2); } ; labeled_statement: TOK_IDENTIFIER { Pike_compiler->compiler_frame->opt_flags &= ~OPT_CUSTOM_LABELS; } ':' statement { $$ = mknode(Pike_compiler->compiler_frame->opt_flags & OPT_CUSTOM_LABELS ? F_CUSTOM_STMT_LABEL : F_NORMAL_STMT_LABEL, $1, $4); /* FIXME: This won't be correct if the node happens to be shared. * That's an issue to be solved with shared nodes in general, * though. */ COPY_LINE_NUMBER_INFO($$, $1); } ; optional_label: TOK_IDENTIFIER | /* empty */ {$$ = 0;} ; break: TOK_BREAK optional_label { $$=mknode(F_BREAK,$2,0); } ; default: TOK_DEFAULT ':' { $$=mknode(F_DEFAULT,0,0); } | TOK_DEFAULT { $$=mknode(F_DEFAULT,0,0); yyerror("Expected ':' after default."); } ; continue: TOK_CONTINUE optional_label { $$=mknode(F_CONTINUE,$2,0); } ; /* This variant is used to push the compiler context for * functions without a declared return type (ie lambdas). */ start_lambda: /* empty */ { push_compiler_frame(SCOPE_LOCAL); debug_malloc_touch(Pike_compiler->compiler_frame->current_return_type); if(Pike_compiler->compiler_frame->current_return_type) free_type(Pike_compiler->compiler_frame->current_return_type); copy_pike_type(Pike_compiler->compiler_frame->current_return_type, any_type_string); $$ = Pike_compiler->compiler_frame; } ; implicit_identifier: /* empty */ { struct pike_string *name; $$=mkstrnode(name = get_new_name(NULL)); free_string(name); } ; lambda: TOK_LAMBDA line_number_info implicit_identifier start_lambda func_args { struct pike_string *name = $3->u.sval.u.string; struct pike_type *type; int e; $<number>$ = Pike_compiler->varargs; Pike_compiler->varargs = 0; if (Pike_compiler->compiler_pass == 1) { /* Define a tentative prototype for the lambda. */ push_finished_type(mixed_type_string); e=$5-1; if($<number>$) { push_finished_type(Pike_compiler->compiler_frame->variable[e].type); e--; pop_type_stack(T_ARRAY); }else{ push_type(T_VOID); } Pike_compiler->varargs=0; push_type(T_MANY); for(; e>=0; e--) { push_finished_type(Pike_compiler->compiler_frame->variable[e].type); push_type(T_FUNCTION); } type=compiler_pop_type(); Pike_compiler->compiler_frame->current_function_number = define_function(name, type, ID_PROTECTED | ID_PRIVATE | ID_INLINE | ID_USED, IDENTIFIER_PIKE_FUNCTION, NULL, (unsigned INT16) (Pike_compiler->compiler_frame->opt_flags)); free_type(type); } else { /* In pass 2 we just reuse the type from pass 1. */ Pike_compiler->compiler_frame->current_function_number = isidentifier(name); } } failsafe_block { struct pike_type *type; int f,e; struct pike_string *name; struct compilation *c = THIS_COMPILATION; struct pike_string *save_file = c->lex.current_file; int save_line = c->lex.current_line; c->lex.current_file = $2->current_file; c->lex.current_line = $2->line_number; debug_malloc_touch($7); $7=mknode(F_COMMA_EXPR,$7,mknode(F_RETURN,mkintnode(0),0)); if (Pike_compiler->compiler_pass == 2) { /* Doing this in pass 1 might induce too strict checks on types * in cases where we got placeholders. */ type=find_return_type($7); if (type) { push_finished_type(type); free_type(type); } else { yywarning("Failed to determine return type for lambda."); push_type(T_ZERO); } } else { /* Tentative return type. */ push_type(T_MIXED); } e=$5-1; if($<number>6) { push_finished_type(Pike_compiler->compiler_frame->variable[e].type); e--; pop_type_stack(T_ARRAY); }else{ push_type(T_VOID); } Pike_compiler->varargs=0; push_type(T_MANY); for(; e>=0; e--) { push_finished_type(Pike_compiler->compiler_frame->variable[e].type); push_type(T_FUNCTION); } type=compiler_pop_type(); name = $3->u.sval.u.string; #ifdef LAMBDA_DEBUG fprintf(stderr, "%d: LAMBDA: %s 0x%08lx 0x%08lx\n%d: type: ", Pike_compiler->compiler_pass, name->str, (long)Pike_compiler->new_program->id, Pike_compiler->local_class_counter-1, Pike_compiler->compiler_pass); simple_describe_type(type); fprintf(stderr, "\n"); #endif /* LAMBDA_DEBUG */ f=dooptcode(name, $7, type, ID_PROTECTED | ID_PRIVATE | ID_INLINE | ID_USED); #ifdef PIKE_DEBUG if (f != Pike_compiler->compiler_frame->current_function_number) { Pike_fatal("Lost track of lambda %s.\n", name->str); } #endif /* PIKE_DEBUG */ #ifdef LAMBDA_DEBUG fprintf(stderr, "%d: lexical_scope: 0x%08x\n", Pike_compiler->compiler_pass, Pike_compiler->compiler_frame->lexical_scope); #endif /* LAMBDA_DEBUG */ if(Pike_compiler->compiler_frame->lexical_scope & SCOPE_SCOPED) { $$ = mktrampolinenode(f, Pike_compiler->compiler_frame->previous); } else { $$ = mkidentifiernode(f); } free_type(type); c->lex.current_line = save_line; c->lex.current_file = save_file; free_node($3); free_node ($2); #ifdef PIKE_DEBUG if (Pike_compiler->compiler_frame != $4) { Pike_fatal("Lost track of compiler_frame!\n" " Got: %p (Expected: %p) Previous: %p\n", Pike_compiler->compiler_frame, $4, Pike_compiler->compiler_frame->previous); } #endif pop_compiler_frame(); } | TOK_LAMBDA line_number_info implicit_identifier start_lambda error { #ifdef PIKE_DEBUG if (Pike_compiler->compiler_frame != $4) { Pike_fatal("Lost track of compiler_frame!\n" " Got: %p (Expected: %p) Previous: %p\n", Pike_compiler->compiler_frame, $4, Pike_compiler->compiler_frame->previous); } #endif pop_compiler_frame(); $$ = mkintnode(0); COPY_LINE_NUMBER_INFO($$, $2); free_node($3); free_node($2); } ; local_function: TOK_IDENTIFIER start_function func_args { struct pike_string *name; struct pike_type *type; int id,e; node *n; struct identifier *i=0; /***/ push_finished_type(Pike_compiler->compiler_frame->current_return_type); e=$3-1; if(Pike_compiler->varargs) { push_finished_type(Pike_compiler->compiler_frame->variable[e].type); e--; pop_type_stack(T_ARRAY); }else{ push_type(T_VOID); } push_type(T_MANY); for(; e>=0; e--) { push_finished_type(Pike_compiler->compiler_frame->variable[e].type); push_type(T_FUNCTION); } type=compiler_pop_type(); /***/ name = get_new_name($1->u.sval.u.string); #ifdef LAMBDA_DEBUG fprintf(stderr, "%d: LAMBDA: %s 0x%08lx 0x%08lx\n", Pike_compiler->compiler_pass, name->str, (long)Pike_compiler->new_program->id, Pike_compiler->local_class_counter-1); #endif /* LAMBDA_DEBUG */ if(Pike_compiler->compiler_pass > 1) { id=isidentifier(name); }else{ id=define_function(name, type, ID_PROTECTED | ID_PRIVATE | ID_INLINE | ID_USED, IDENTIFIER_PIKE_FUNCTION | (Pike_compiler->varargs?IDENTIFIER_VARARGS:0), 0, OPT_SIDE_EFFECT|OPT_EXTERNAL_DEPEND); } Pike_compiler->varargs=0; Pike_compiler->compiler_frame->current_function_number=id; n=0; if(Pike_compiler->compiler_pass > 1 && (i=ID_FROM_INT(Pike_compiler->new_program, id))) { if(i->identifier_flags & IDENTIFIER_SCOPED) n = mktrampolinenode(id, Pike_compiler->compiler_frame->previous); else n = mkidentifiernode(id); } low_add_local_name(Pike_compiler->compiler_frame->previous, $1->u.sval.u.string, type, n); $<number>$=id; free_string(name); } failsafe_block { int localid; struct identifier *i=ID_FROM_INT(Pike_compiler->new_program, $<number>4); struct compilation *c = THIS_COMPILATION; struct pike_string *save_file = c->lex.current_file; int save_line = c->lex.current_line; c->lex.current_file = $1->current_file; c->lex.current_line = $1->line_number; $5=mknode(F_COMMA_EXPR,$5,mknode(F_RETURN,mkintnode(0),0)); debug_malloc_touch($5); dooptcode(i->name, $5, i->type, ID_PROTECTED | ID_PRIVATE | ID_INLINE); i->opt_flags = Pike_compiler->compiler_frame->opt_flags; c->lex.current_line = save_line; c->lex.current_file = save_file; #ifdef PIKE_DEBUG if (Pike_compiler->compiler_frame != $2) { Pike_fatal("Lost track of compiler_frame!\n" " Got: %p (Expected: %p) Previous: %p\n", Pike_compiler->compiler_frame, $2, Pike_compiler->compiler_frame->previous); } #endif pop_compiler_frame(); free_node($1); /* WARNING: If the local function adds more variables we are screwed */ /* WARNING2: if add_local_name stops adding local variables at the end, * this has to be fixed. */ localid=Pike_compiler->compiler_frame->current_number_of_locals-1; if(Pike_compiler->compiler_frame->variable[localid].def) { $$=copy_node(Pike_compiler->compiler_frame->variable[localid].def); }else{ if(Pike_compiler->compiler_frame->lexical_scope & (SCOPE_SCOPE_USED | SCOPE_SCOPED)) { $$ = mktrampolinenode($<number>4,Pike_compiler->compiler_frame); }else{ $$ = mkidentifiernode($<number>4); } } } | TOK_IDENTIFIER start_function error { #ifdef PIKE_DEBUG if (Pike_compiler->compiler_frame != $2) { Pike_fatal("Lost track of compiler_frame!\n" " Got: %p (Expected: %p) Previous: %p\n", Pike_compiler->compiler_frame, $2, Pike_compiler->compiler_frame->previous); } #endif pop_compiler_frame(); $$=mkintnode(0); } ; create_arg: modifiers simple_type optional_dot_dot_dot TOK_IDENTIFIER { struct pike_type *type; int ref_no; if (Pike_compiler->num_create_args < 0) { yyerror("Can't define more variables after ..."); } if ($3) { push_finished_type(Pike_compiler->compiler_frame->current_type); push_type(T_ARRAY); type = compiler_pop_type(); } else { copy_pike_type(type, Pike_compiler->compiler_frame->current_type); } /* Add the identifier globally. * Note: Since these are the first identifiers (and references) * to be added to the program, they will be numbered in * sequence starting at 0 (zero). This means that the * counter num_create_args is sufficient extra information * to be able to keep track of them. */ ref_no = define_variable($4->u.sval.u.string, type, Pike_compiler->current_modifiers); free_type(type); if (Pike_compiler->num_create_args != ref_no) { my_yyerror("Multiple definitions of create variable %S (%d != %d).", $4->u.sval.u.string, Pike_compiler->num_create_args, ref_no); } if ($3) { /* Encode varargs marker as negative number of args. */ Pike_compiler->num_create_args = -(ref_no + 1); } else { Pike_compiler->num_create_args = ref_no + 1; } /* free_type(type); */ free_node($4); $$=0; } | modifiers simple_type bad_identifier { $$=0; } ; create_arguments2: create_arg { $$ = 1; } | create_arguments2 ',' create_arg { $$ = $1 + 1; } | create_arguments2 ':' create_arg { yyerror("Unexpected ':' in create argument list."); $$ = $1 + 1; } ; create_arguments: /* empty */ optional_comma { $$=0; } | create_arguments2 optional_comma ; optional_create_arguments: /* empty */ { $$ = 0; } | '(' create_arguments close_paren_or_missing { /* NOTE: One more than the number of arguments, so that we < * can detect the case of no parenthesis below. */ $$ = $2 + 1; free_node($3); } ; failsafe_program: '{' program { $<n>$ = NULL; } end_block | error { yyerrok; } | TOK_LEX_EOF { yyerror("End of file where program definition expected."); } ; /* Modifiers at $0. */ anon_class: TOK_CLASS line_number_info { struct pike_string *s; char buffer[42]; sprintf(buffer,"__class_%ld_%ld_line_%d", (long)Pike_compiler->new_program->id, (long)Pike_compiler->local_class_counter++, (int) $2->line_number); s = make_shared_string(buffer); $<n>$ = mkstrnode(s); free_string(s); $<number>0 |= ID_PROTECTED | ID_PRIVATE | ID_INLINE; } { /* fprintf(stderr, "LANGUAGE.YACC: CLASS start\n"); */ if(Pike_compiler->compiler_pass==1) { if ($<number>0 & ID_EXTERN) { yywarning("Extern declared class definition."); } low_start_new_program(0, 1, $<n>3->u.sval.u.string, $<number>0, &$<number>$); /* fprintf(stderr, "Pass 1: Program %s has id %d\n", $4->u.sval.u.string->str, Pike_compiler->new_program->id); */ store_linenumber($2->line_number, $2->current_file); debug_malloc_name(Pike_compiler->new_program, $2->current_file->str, $2->line_number); }else{ int i; struct identifier *id; int tmp=Pike_compiler->compiler_pass; i=isidentifier($<n>3->u.sval.u.string); if(i<0) { /* Seriously broken... */ yyerror("Pass 2: program not defined!"); low_start_new_program(0, 2, 0, $<number>0, &$<number>$); }else{ id=ID_FROM_INT(Pike_compiler->new_program, i); if(IDENTIFIER_IS_CONSTANT(id->identifier_flags)) { struct svalue *s; if ((id->func.const_info.offset >= 0) && (TYPEOF(*(s = &PROG_FROM_INT(Pike_compiler->new_program,i)-> constants[id->func.const_info.offset].sval)) == T_PROGRAM)) { low_start_new_program(s->u.program, 2, $<n>3->u.sval.u.string, $<number>0, &$<number>$); /* fprintf(stderr, "Pass 2: Program %s has id %d\n", $4->u.sval.u.string->str, Pike_compiler->new_program->id); */ }else{ yyerror("Pass 2: constant redefined!"); low_start_new_program(0, 2, 0, $<number>0, &$<number>$); } }else{ yyerror("Pass 2: class constant no longer constant!"); low_start_new_program(0, 2, 0, $<number>0, &$<number>$); } } Pike_compiler->compiler_pass=tmp; } } { /* Clear scoped modifiers. */ $<number>$ = THIS_COMPILATION->lex.pragmas; THIS_COMPILATION->lex.pragmas &= ~ID_MODIFIER_MASK; } optional_create_arguments failsafe_program { struct program *p; /* Check if we have create arguments but no locally defined create(). */ if ($6) { struct pike_string *create_string = NULL; struct reference *ref = NULL; struct identifier *id = NULL; int ref_id; MAKE_CONST_STRING(create_string, "create"); if (((ref_id = isidentifier(create_string)) < 0) || (ref = PTR_FROM_INT(Pike_compiler->new_program, ref_id))->inherit_offset || ((id = ID_FROM_PTR(Pike_compiler->new_program, ref))->func.offset == -1)) { int e; struct pike_type *type = NULL; int nargs = Pike_compiler->num_create_args; push_compiler_frame(SCOPE_LOCAL); /* Init: Prepend the create arguments. */ if (Pike_compiler->num_create_args < 0) { for (e = 0; e < -Pike_compiler->num_create_args; e++) { id = Pike_compiler->new_program->identifiers + e; add_ref(id->type); add_local_name(id->name, id->type, 0); /* Note: add_local_name() above will return e. */ Pike_compiler->compiler_frame->variable[e].flags |= LOCAL_VAR_IS_USED; } } else { for (e = 0; e < Pike_compiler->num_create_args; e++) { id = Pike_compiler->new_program->identifiers + e; add_ref(id->type); add_local_name(id->name, id->type, 0); /* Note: add_local_name() above will return e. */ Pike_compiler->compiler_frame->variable[e].flags |= LOCAL_VAR_IS_USED; } } /* First: Deduce the type for the create() function. */ push_type(T_VOID); /* Return type. */ if ((e = nargs) < 0) { /* Varargs */ e = nargs = -nargs; push_finished_type(Pike_compiler->compiler_frame->variable[--e].type); pop_type_stack(T_ARRAY); /* Pop one level of array. */ } else { /* Not varargs. */ push_type(T_VOID); } push_type(T_MANY); while(e--) { push_finished_type(Pike_compiler->compiler_frame->variable[e].type); push_type(T_FUNCTION); } type = compiler_pop_type(); /* Second: Declare the function. */ Pike_compiler->compiler_frame->current_function_number= define_function(create_string, type, ID_INLINE | ID_PROTECTED, IDENTIFIER_PIKE_FUNCTION | (Pike_compiler->num_create_args < 0?IDENTIFIER_VARARGS:0), 0, OPT_SIDE_EFFECT); if (Pike_compiler->compiler_pass == 2) { node *create_code = NULL; int f; /* Third: Generate the initialization code. * * global_arg = [type]local_arg; * [,..] */ for(e=0; e<nargs; e++) { if(!Pike_compiler->compiler_frame->variable[e].name || !Pike_compiler->compiler_frame->variable[e].name->len) { my_yyerror("Missing name for argument %d.",e); } else { node *local_node = mklocalnode(e, 0); /* FIXME: Should probably use some other flag. */ if ((runtime_options & RUNTIME_CHECK_TYPES) && (Pike_compiler->compiler_pass == 2) && (Pike_compiler->compiler_frame->variable[e].type != mixed_type_string)) { /* fprintf(stderr, "Creating soft cast node for local #%d\n", e);*/ local_node = mkcastnode(mixed_type_string, local_node); /* NOTE: The cast to mixed above is needed to avoid generating * compilation errors, as well as avoiding optimizations * in mksoftcastnode(). */ local_node = mksoftcastnode(Pike_compiler->compiler_frame-> variable[e].type, local_node); } create_code = mknode(F_COMMA_EXPR, create_code, mknode(F_ASSIGN, mkidentifiernode(e), local_node)); } } /* Fourth: Add a return 0; at the end. */ create_code = mknode(F_COMMA_EXPR, mknode(F_POP_VALUE, create_code, NULL), mknode(F_RETURN, mkintnode(0), NULL)); /* Fifth: Define the function. */ f=dooptcode(create_string, create_code, type, ID_PROTECTED); #ifdef PIKE_DEBUG if(Pike_interpreter.recoveries && Pike_sp-Pike_interpreter.evaluator_stack < Pike_interpreter.recoveries->stack_pointer) Pike_fatal("Stack error (underflow)\n"); if(Pike_compiler->compiler_pass == 1 && f!=Pike_compiler->compiler_frame->current_function_number) Pike_fatal("define_function screwed up! %d != %d\n", f, Pike_compiler->compiler_frame->current_function_number); #endif } /* Done. */ free_type(type); pop_compiler_frame(); } } if(Pike_compiler->compiler_pass == 1) p=end_first_pass(0); else p=end_first_pass(1); /* fprintf(stderr, "LANGUAGE.YACC: CLASS end\n"); */ if(p) { /* Update the type for the program constant, * since we might have a lfun::create(). */ struct identifier *i; struct svalue sv; SET_SVAL(sv, T_PROGRAM, 0, program, p); i = ID_FROM_INT(Pike_compiler->new_program, $<number>4); free_type(i->type); i->type = get_type_of_svalue(&sv); free_program(p); } else if (!Pike_compiler->num_parse_error) { /* Make sure code in this class is aware that something went wrong. */ Pike_compiler->num_parse_error = 1; } $$=mkidentifiernode($<number>4); free_node($2); free_node($<n>3); check_tree($$,0); THIS_COMPILATION->lex.pragmas = $<number>5; } ; /* Modifiers at $0. */ named_class: TOK_CLASS line_number_info simple_identifier { if(!$3) { struct pike_string *s; char buffer[42]; sprintf(buffer,"__class_%ld_%ld_line_%d", (long)Pike_compiler->new_program->id, (long)Pike_compiler->local_class_counter++, (int) $2->line_number); s=make_shared_string(buffer); $3=mkstrnode(s); free_string(s); $<number>0|=ID_PROTECTED | ID_PRIVATE | ID_INLINE; } /* fprintf(stderr, "LANGUAGE.YACC: CLASS start\n"); */ if(Pike_compiler->compiler_pass==1) { if ($<number>0 & ID_EXTERN) { yywarning("Extern declared class definition."); } low_start_new_program(0, 1, $3->u.sval.u.string, $<number>0, &$<number>$); /* fprintf(stderr, "Pass 1: Program %s has id %d\n", $4->u.sval.u.string->str, Pike_compiler->new_program->id); */ store_linenumber($2->line_number, $2->current_file); debug_malloc_name(Pike_compiler->new_program, $2->current_file->str, $2->line_number); }else{ int i; struct identifier *id; int tmp=Pike_compiler->compiler_pass; i=isidentifier($3->u.sval.u.string); if(i<0) { /* Seriously broken... */ yyerror("Pass 2: program not defined!"); low_start_new_program(0, 2, 0, $<number>0, &$<number>$); }else{ id=ID_FROM_INT(Pike_compiler->new_program, i); if(IDENTIFIER_IS_CONSTANT(id->identifier_flags)) { struct svalue *s; if ((id->func.const_info.offset >= 0) && (TYPEOF(*(s = &PROG_FROM_INT(Pike_compiler->new_program,i)-> constants[id->func.const_info.offset].sval)) == T_PROGRAM)) { low_start_new_program(s->u.program, 2, $3->u.sval.u.string, $<number>0, &$<number>$); /* fprintf(stderr, "Pass 2: Program %s has id %d\n", $4->u.sval.u.string->str, Pike_compiler->new_program->id); */ }else{ yyerror("Pass 2: constant redefined!"); low_start_new_program(0, 2, 0, $<number>0, &$<number>$); } }else{ yyerror("Pass 2: class constant no longer constant!"); low_start_new_program(0, 2, 0, $<number>0, &$<number>$); } } Pike_compiler->compiler_pass=tmp; } } { /* Clear scoped modifiers. */ $<number>$ = THIS_COMPILATION->lex.pragmas; THIS_COMPILATION->lex.pragmas &= ~ID_MODIFIER_MASK; } optional_create_arguments failsafe_program { struct program *p; /* Check if we have create arguments but no locally defined create(). */ if ($6) { struct pike_string *create_string = NULL; struct reference *ref = NULL; struct identifier *id = NULL; int ref_id; MAKE_CONST_STRING(create_string, "create"); if (((ref_id = isidentifier(create_string)) < 0) || (ref = PTR_FROM_INT(Pike_compiler->new_program, ref_id))->inherit_offset || ((id = ID_FROM_PTR(Pike_compiler->new_program, ref))->func.offset == -1)) { int e; struct pike_type *type = NULL; int nargs = Pike_compiler->num_create_args; push_compiler_frame(SCOPE_LOCAL); /* Init: Prepend the create arguments. */ if (Pike_compiler->num_create_args < 0) { for (e = 0; e < -Pike_compiler->num_create_args; e++) { id = Pike_compiler->new_program->identifiers + e; add_ref(id->type); add_local_name(id->name, id->type, 0); /* Note: add_local_name() above will return e. */ Pike_compiler->compiler_frame->variable[e].flags |= LOCAL_VAR_IS_USED; } } else { for (e = 0; e < Pike_compiler->num_create_args; e++) { id = Pike_compiler->new_program->identifiers + e; add_ref(id->type); add_local_name(id->name, id->type, 0); /* Note: add_local_name() above will return e. */ Pike_compiler->compiler_frame->variable[e].flags |= LOCAL_VAR_IS_USED; } } /* First: Deduce the type for the create() function. */ push_type(T_VOID); /* Return type. */ if ((e = nargs) < 0) { /* Varargs */ e = nargs = -nargs; push_finished_type(Pike_compiler->compiler_frame->variable[--e].type); pop_type_stack(T_ARRAY); /* Pop one level of array. */ } else { /* Not varargs. */ push_type(T_VOID); } push_type(T_MANY); while(e--) { push_finished_type(Pike_compiler->compiler_frame->variable[e].type); push_type(T_FUNCTION); } type = compiler_pop_type(); /* Second: Declare the function. */ Pike_compiler->compiler_frame->current_function_number= define_function(create_string, type, ID_INLINE | ID_PROTECTED, IDENTIFIER_PIKE_FUNCTION | (Pike_compiler->num_create_args < 0?IDENTIFIER_VARARGS:0), 0, OPT_SIDE_EFFECT); if (Pike_compiler->compiler_pass == 2) { node *create_code = NULL; int f; /* Third: Generate the initialization code. * * global_arg = [type]local_arg; * [,..] */ for(e=0; e<nargs; e++) { if(!Pike_compiler->compiler_frame->variable[e].name || !Pike_compiler->compiler_frame->variable[e].name->len) { my_yyerror("Missing name for argument %d.",e); } else { node *local_node = mklocalnode(e, 0); /* FIXME: Should probably use some other flag. */ if ((runtime_options & RUNTIME_CHECK_TYPES) && (Pike_compiler->compiler_pass == 2) && (Pike_compiler->compiler_frame->variable[e].type != mixed_type_string)) { /* fprintf(stderr, "Creating soft cast node for local #%d\n", e);*/ local_node = mkcastnode(mixed_type_string, local_node); /* NOTE: The cast to mixed above is needed to avoid generating * compilation errors, as well as avoiding optimizations * in mksoftcastnode(). */ local_node = mksoftcastnode(Pike_compiler->compiler_frame-> variable[e].type, local_node); } create_code = mknode(F_COMMA_EXPR, create_code, mknode(F_ASSIGN, mkidentifiernode(e), local_node)); } } /* Fourth: Add a return 0; at the end. */ create_code = mknode(F_COMMA_EXPR, mknode(F_POP_VALUE, create_code, NULL), mknode(F_RETURN, mkintnode(0), NULL)); /* Fifth: Define the function. */ f=dooptcode(create_string, create_code, type, ID_PROTECTED); #ifdef PIKE_DEBUG if(Pike_interpreter.recoveries && Pike_sp-Pike_interpreter.evaluator_stack < Pike_interpreter.recoveries->stack_pointer) Pike_fatal("Stack error (underflow)\n"); if(Pike_compiler->compiler_pass == 1 && f!=Pike_compiler->compiler_frame->current_function_number) Pike_fatal("define_function screwed up! %d != %d\n", f, Pike_compiler->compiler_frame->current_function_number); #endif } /* Done. */ free_type(type); pop_compiler_frame(); } } if(Pike_compiler->compiler_pass == 1) p=end_first_pass(0); else p=end_first_pass(1); /* fprintf(stderr, "LANGUAGE.YACC: CLASS end\n"); */ if(p) { /* Update the type for the program constant, * since we might have a lfun::create(). */ struct identifier *i; struct svalue sv; SET_SVAL(sv, T_PROGRAM, 0, program, p); i = ID_FROM_INT(Pike_compiler->new_program, $<number>4); free_type(i->type); i->type = get_type_of_svalue(&sv); free_program(p); } else if (!Pike_compiler->num_parse_error) { /* Make sure code in this class is aware that something went wrong. */ Pike_compiler->num_parse_error = 1; } $$=mkidentifiernode($<number>4); free_node($2); free_node($3); check_tree($$,0); THIS_COMPILATION->lex.pragmas = $<number>5; } ; simple_identifier: TOK_IDENTIFIER | bad_identifier { $$ = 0; } ; enum_value: /* EMPTY */ { $$ = 0; } | '=' safe_expr0 { $$ = $2; } ; /* Previous enum value at $0. */ enum_def: /* EMPTY */ | simple_identifier enum_value { if ($1) { if ($2) { /* Explicit enum value. */ /* This can be made more lenient in the future */ /* Ugly hack to make sure that $2 is optimized */ { int tmp=Pike_compiler->compiler_pass; $2=mknode(F_COMMA_EXPR,$2,0); Pike_compiler->compiler_pass=tmp; } if(!is_const($2)) { if(Pike_compiler->compiler_pass==2) yyerror("Enum definition is not constant."); push_int(0); } else { if(!Pike_compiler->num_parse_error) { ptrdiff_t tmp=eval_low($2,1); if(tmp < 1) { yyerror("Error in enum definition."); push_int(0); }else{ pop_n_elems((INT32)(tmp - 1)); } } else { push_int(0); } } free_node($2); free_node($<n>0); $<n>0 = mkconstantsvaluenode(Pike_sp-1); } else { /* Implicit enum value. */ $<n>0 = safe_inc_enum($<n>0); push_svalue(&$<n>0->u.sval); } add_constant($1->u.sval.u.string, Pike_sp-1, (Pike_compiler->current_modifiers & ~ID_EXTERN) | ID_INLINE); /* Update the type. */ { struct pike_type *current = pop_unfinished_type(); struct pike_type *new = get_type_of_svalue(Pike_sp-1); struct pike_type *res = or_pike_types(new, current, 3); free_type(current); free_type(new); type_stack_mark(); push_finished_type(res); free_type(res); } pop_stack(); free_node($1); } else if ($2) { free_node($2); } } ; /* Previous enum value at $-2 */ propagated_enum_value: { $$ = $<n>-2; } ; /* Previous enum value at $0. */ enum_list: enum_def | enum_list ',' propagated_enum_value enum_def { $<n>0 = $3; } | error ; /* Modifiers at $0. */ enum: TOK_ENUM { if ((Pike_compiler->current_modifiers & ID_EXTERN) && (Pike_compiler->compiler_pass == 1)) { yywarning("Extern declared enum."); } type_stack_mark(); push_type(T_ZERO); /* Joined type so far. */ } optional_identifier '{' { push_int(-1); /* Previous value. */ $<n>$ = mkconstantsvaluenode(Pike_sp-1); pop_stack(); } enum_list { $<n>$ = NULL; } end_block { struct pike_type *t = pop_unfinished_type(); free_node($<n>5); if ($3) { ref_push_type_value(t); add_constant($3->u.sval.u.string, Pike_sp-1, (Pike_compiler->current_modifiers & ~ID_EXTERN) | ID_INLINE); pop_stack(); free_node($3); } $$ = mktypenode(t); free_type(t); } ; typedef: modifiers TOK_TYPEDEF full_type simple_identifier ';' { struct pike_type *t = compiler_pop_type(); if ((Pike_compiler->current_modifiers & ID_EXTERN) && (Pike_compiler->compiler_pass == 1)) { yywarning("Extern declared typedef."); } if ($4) { ref_push_type_value(t); add_constant($4->u.sval.u.string, Pike_sp-1, (Pike_compiler->current_modifiers & ~ID_EXTERN) | ID_INLINE); pop_stack(); free_node($4); } free_type(t); } ; save_locals: /* empty */ { Pike_compiler->compiler_frame->last_block_level = $$ = Pike_compiler->compiler_frame->current_number_of_locals; } ; save_block_level: /* empty */ { /* Trick to store more than one number on compiler stack - Hubbe */ $$ = Pike_compiler->compiler_frame->last_block_level; } ; cond: TOK_IF save_block_level save_locals line_number_info '(' safe_comma_expr end_cond statement optional_else_part { $$ = mknode('?', $6, mknode(':', mkcastnode(void_type_string, $8), mkcastnode(void_type_string, $9))); COPY_LINE_NUMBER_INFO($$, $4); $$ = mkcastnode(void_type_string, $$); COPY_LINE_NUMBER_INFO($$, $4); free_node($4); $$ = pop_local_variables($3, $$); Pike_compiler->compiler_frame->last_block_level = $2; } ; end_cond: ')' | '}' { yyerror("Missing ')'."); } | TOK_LEX_EOF { yyerror("Missing ')'."); yyerror("Unexpected end of file."); } ; optional_else_part: { $$=0; } | TOK_ELSE statement { $$=$2; } ; safe_lvalue: lvalue { if (!(THIS_COMPILATION->lex.pragmas & ID_STRICT_TYPES) && $1) { if ($1->token == F_ARRAY_LVALUE) { mark_lvalues_as_used(CAR($1)); } else if (($1->token == F_LOCAL) && !($1->u.integer.b)) { Pike_compiler->compiler_frame->variable[$1->u.integer.a].flags |= LOCAL_VAR_IS_USED; } } } | error { $$=0; } ; safe_expr0: expr0 | TOK_LEX_EOF { yyerror("Unexpected end of file."); $$=0; } | error { $$=0; } ; foreach_optional_lvalue: /* empty */ { $$=0; } | safe_lvalue ; foreach_lvalues: ',' safe_lvalue { $$=$2; } | ';' foreach_optional_lvalue ';' foreach_optional_lvalue { $$=mknode(':',$2,$4); } ; foreach: TOK_FOREACH save_block_level save_locals line_number_info '(' expr0 foreach_lvalues end_cond { /* Fix AUTO type. */ struct pike_type *ind=NULL, *val=NULL; if(Pike_compiler->compiler_pass == 2) { fix_type_field( $6 ); fix_type_field( $7 ); check_foreach_type( $6, $7, &ind, &val ); if( $7->token == ':' ) { if( CAR($7) && CAR($7)->type->type == PIKE_T_AUTO ) { if( CAR($7)->token == F_LOCAL && !CAR($7)->u.integer.b) { copy_pike_type(Pike_compiler->compiler_frame->variable[CAR($7)->u.integer.a].type, ind); } else { yywarning("Unexpected auto type usage\n"); } } if( CDR($7) && CDR($7)->type->type == PIKE_T_AUTO ) { if( CDR($7)->token == F_LOCAL && !CDR($7)->u.integer.b) { copy_pike_type(Pike_compiler->compiler_frame->variable[CDR($7)->u.integer.a].type, val); } else { yywarning("Unexpected auto type usage\n"); } } } else { fix_type_field( $7 ); if( $7->type->type == PIKE_T_AUTO ) { if( $7->token == F_LOCAL && !$7->u.integer.b) { copy_pike_type(Pike_compiler->compiler_frame->variable[$7->u.integer.a].type, val); } else { yywarning("Unexpected auto type usage\n"); } } /* old style foreach. */ } if(ind)free_type(ind); if(val)free_type(val); $<number>$=0; } } statement { if ($7) { $$=mknode(F_FOREACH, mknode(F_VAL_LVAL,$6,$7), $10); } else { /* Error in lvalue */ $$=mknode(F_COMMA_EXPR, mkcastnode(void_type_string, $6), $10); } COPY_LINE_NUMBER_INFO($$, $4); free_node($4); $$ = pop_local_variables($3, $$); Pike_compiler->compiler_frame->last_block_level = $2; Pike_compiler->compiler_frame->opt_flags |= OPT_CUSTOM_LABELS; } ; do: TOK_DO line_number_info statement TOK_WHILE '(' safe_comma_expr end_cond expected_semicolon { $$=mknode(F_DO,$3,$6); COPY_LINE_NUMBER_INFO($$, $2); free_node ($2); Pike_compiler->compiler_frame->opt_flags |= OPT_CUSTOM_LABELS; } | TOK_DO line_number_info statement TOK_WHILE TOK_LEX_EOF { free_node ($2); $$=0; yyerror("Missing '(' in do-while loop."); yyerror("Unexpected end of file."); } | TOK_DO line_number_info statement TOK_LEX_EOF { free_node ($2); $$=0; yyerror("Missing 'while' in do-while loop."); yyerror("Unexpected end of file."); } ; expected_semicolon: ';' | TOK_LEX_EOF { yyerror("Missing ';'."); yyerror("Unexpected end of file."); } ; for: TOK_FOR save_block_level save_locals line_number_info '(' unused expected_semicolon for_expr expected_semicolon unused end_cond statement { $$=mknode(F_COMMA_EXPR, mkcastnode(void_type_string, $6), mknode(F_FOR,$8,mknode(':',$12,$10))); COPY_LINE_NUMBER_INFO($$, $4); free_node($4); $$ = pop_local_variables($3, $$); Pike_compiler->compiler_frame->last_block_level = $2; Pike_compiler->compiler_frame->opt_flags |= OPT_CUSTOM_LABELS; } ; while: TOK_WHILE save_block_level save_locals line_number_info '(' safe_comma_expr end_cond statement { $$=mknode(F_FOR,$6,mknode(':',$8,NULL)); COPY_LINE_NUMBER_INFO($$, $4); free_node($4); $$ = pop_local_variables($3, $$); Pike_compiler->compiler_frame->last_block_level = $2; Pike_compiler->compiler_frame->opt_flags |= OPT_CUSTOM_LABELS; } ; for_expr: /* EMPTY */ { $$=mkintnode(1); } | safe_comma_expr ; switch: TOK_SWITCH save_block_level save_locals line_number_info '(' safe_comma_expr end_cond statement { $$=mknode(F_SWITCH,$6,$8); COPY_LINE_NUMBER_INFO($$, $4); free_node($4); $$ = pop_local_variables($3, $$); Pike_compiler->compiler_frame->last_block_level = $2; } ; case: TOK_CASE safe_comma_expr expected_colon { $$=mknode(F_CASE,$2,0); } | TOK_CASE safe_comma_expr expected_dot_dot optional_comma_expr expected_colon { $$=mknode(F_CASE_RANGE,$2,$4); } | TOK_CASE expected_dot_dot safe_comma_expr expected_colon { $$=mknode(F_CASE_RANGE,0,$3); } ; expected_colon: ':' | ';' { yyerror("Missing ':'."); } | '}' { yyerror("Missing ':'."); } | TOK_LEX_EOF { yyerror("Missing ':'."); yyerror("Unexpected end of file."); } ; return: TOK_RETURN expected_semicolon { if(!match_types(Pike_compiler->compiler_frame->current_return_type, void_type_string)) { yytype_error("Must return a value for a non-void function.", Pike_compiler->compiler_frame->current_return_type, void_type_string, 0); } $$=mknode(F_RETURN,mkintnode(0),0); } | TOK_RETURN safe_comma_expr expected_semicolon { $$=mknode(F_RETURN,$2,0); } ; unused: { $$=0; } | safe_comma_expr { $$=mkcastnode(void_type_string, $1); } ; unused2: comma_expr { $$=mkcastnode(void_type_string, $1); } ; optional_comma_expr: { $$=0; } | safe_comma_expr ; safe_comma_expr: comma_expr | error { $$=0; } ; comma_expr: comma_expr2 | simple_type2 local_name_list { $$=$2; } ; comma_expr2: expr0 | comma_expr2 ',' expr0 { $$ = mknode(F_COMMA_EXPR, mkcastnode(void_type_string, $1), $3); } ; splice_expr: expr0 | '@' expr0 { $$=mknode(F_PUSH_ARRAY,$2,0); }; expr0: expr01 | expr4 assign expr0 { $$=mknode($2,$1,$3); } | expr4 assign error { $$=$1; reset_type_stack(); yyerrok; } | open_bracket_with_line_info low_lvalue_list ']' assign expr0 { if (!(THIS_COMPILATION->lex.pragmas & ID_STRICT_TYPES)) { mark_lvalues_as_used($2); } $$=mknode($4,mknode(F_ARRAY_LVALUE,$2,0),$5); COPY_LINE_NUMBER_INFO($$, $1); free_node ($1); } | open_bracket_with_line_info low_lvalue_list ']' error { $$=$2; free_node ($1); reset_type_stack(); yyerrok; } /* | error { $$=0; reset_type_stack(); } */ ; expr01: expr1 | expr1 '?' expr01 ':' expr01 { $$=mknode('?',$1,mknode(':',$3,$5)); } ; assign: '=' { $$=F_ASSIGN; } | TOK_AND_EQ { $$=F_AND_EQ; } | TOK_OR_EQ { $$=F_OR_EQ; } | TOK_XOR_EQ { $$=F_XOR_EQ; } | TOK_LSH_EQ { $$=F_LSH_EQ; } | TOK_RSH_EQ { $$=F_RSH_EQ; } | TOK_ADD_EQ { $$=F_ADD_EQ; } | TOK_SUB_EQ { $$=F_SUB_EQ; } | TOK_MULT_EQ{ $$=F_MULT_EQ; } | TOK_POW_EQ { $$=F_POW_EQ; } | TOK_MOD_EQ { $$=F_MOD_EQ; } | TOK_DIV_EQ { $$=F_DIV_EQ; } ; optional_comma: { $$=0; } | ',' { $$=1; }; expr_list: { $$=0; } | expr_list2 optional_comma ; expr_list2: splice_expr | expr_list2 ',' splice_expr { $$=mknode(F_ARG_LIST,$1,$3); } ; m_expr_list: { $$=0; } | m_expr_list2 optional_comma ; m_expr_list2: assoc_pair | m_expr_list2 ',' assoc_pair { if ($3) { $$=mknode(F_ARG_LIST,$1,$3); } else { /* Error in assoc_pair */ $$=$1; } } | m_expr_list2 ',' error ; assoc_pair: expr0 expected_colon expr0 { $$=mknode(F_ARG_LIST,$1,$3); } | expr0 expected_colon error { free_node($1); $$=0; } ; expr1: expr2 | expr1 TOK_LOR expr1 { $$=mknode(F_LOR,$1,$3); } | expr1 TOK_LAND expr1 { $$=mknode(F_LAND,$1,$3); } | expr1 '|' expr1 { $$=mkopernode("`|",$1,$3); } | expr1 '^' expr1 { $$=mkopernode("`^",$1,$3); } | expr1 '&' expr1 { $$=mkopernode("`&",$1,$3); } | expr1 TOK_EQ expr1 { $$=mkopernode("`==",$1,$3); } | expr1 TOK_NE expr1 { $$=mkopernode("`!=",$1,$3); } | expr1 '>' expr1 { $$=mkopernode("`>",$1,$3); } | expr1 TOK_GE expr1 { $$=mkopernode("`>=",$1,$3); } | expr1 '<' expr1 { $$=mkopernode("`<",$1,$3); } | expr1 TOK_LE expr1 { $$=mkopernode("`<=",$1,$3); } | expr1 TOK_LSH expr1 { $$=mkopernode("`<<",$1,$3); } | expr1 TOK_RSH expr1 { $$=mkopernode("`>>",$1,$3); } | expr1 '+' expr1 { $$=mkopernode("`+",$1,$3); } | expr1 '-' expr1 { $$=mkopernode("`-",$1,$3); } | expr1 '*' expr1 { $$=mkopernode("`*",$1,$3); } | expr1 TOK_POW expr1 { $$=mkopernode("`**",$1,$3); } | expr1 '%' expr1 { $$=mkopernode("`%",$1,$3); } | expr1 '/' expr1 { $$=mkopernode("`/",$1,$3); } | expr1 TOK_LOR error | expr1 TOK_LAND error | expr1 '|' error | expr1 '^' error | expr1 '&' error | expr1 TOK_EQ error | expr1 TOK_NE error | expr1 '>' error | expr1 TOK_GE error | expr1 '<' error | expr1 TOK_LE error | expr1 TOK_LSH error | expr1 TOK_RSH error | expr1 '+' error | expr1 '-' error | expr1 '*' error | expr1 '%' error | expr1 '/' error ; expr2: expr3 | cast expr2 { $$ = mkcastnode($1->u.sval.u.type, $2); free_node($1); } | soft_cast expr2 { $$ = mksoftcastnode($1->u.sval.u.type, $2); free_node($1); } | TOK_INC expr4 { $$=mknode(F_INC,$2,0); } | TOK_DEC expr4 { $$=mknode(F_DEC,$2,0); } | TOK_NOT expr2 { $$=mkopernode("`!",$2,0); } | '~' expr2 { if ($2 && ($2->token == F_CONSTANT) && (TYPEOF($2->u.sval) == T_INT)) { $$ = mkintnode(~($2->u.sval.u.integer)); free_node($2); } else { $$ = mkopernode("`~", $2, 0); } } | '-' expr2 { if ($2 && ($2->token == F_CONSTANT) && (TYPEOF($2->u.sval) == T_INT) && !INT_TYPE_NEG_OVERFLOW($2->u.sval.u.integer)) { $$ = mkintnode(-($2->u.sval.u.integer)); free_node($2); } else { $$=mkopernode("`-", $2, 0); } } ; expr3: expr4 | expr4 TOK_INC { $$=mknode(F_POST_INC,$1,0); } | expr4 TOK_DEC { $$=mknode(F_POST_DEC,$1,0); } ; /* FIXMEs * It would be nice if 'return' would exit from * the surrounding function rather than from the * implicit lambda. (I think) So beware that the * behaviour of 'return' might change some day. * -Hubbe * * It would also be nice if it was possible to send * arguments to the implicit function, but it would * require using ugly implicit variables or extending * the syntax, and if you extend the syntax you might * as well use lambda() instead. * -Hubbe * * We might want to allow having more than block after * a function ( ie. func(args) {} {} {} {} ) * -Hubbe */ optional_block: /* EMPTY */ { $$=0; } | '{' line_number_info /* FIXME: Use implicit_identifier to make __func__ point to the lambda? */ start_lambda { /* block code */ $<number>1=Pike_compiler->num_used_modules; $<number>$=Pike_compiler->compiler_frame->current_number_of_locals; /* Declare the argument variable. * * NB: The code in the next block knows that this variable * will be variable #0. */ push_type(T_MIXED); push_type(T_ARRAY); add_local_name(args_string, compiler_pop_type(), 0); } statements end_block { struct pike_type *type; int f/*, e */; struct pike_string *name; struct compilation *c = THIS_COMPILATION; struct pike_string *save_file = c->lex.current_file; int save_line = c->lex.current_line; int args_used = Pike_compiler->compiler_frame->variable[0].flags & LOCAL_VAR_IS_USED; /* Don't warn about the argument if unused. */ Pike_compiler->compiler_frame->variable[0].flags |= LOCAL_VAR_IS_USED; c->lex.current_file = $2->current_file; c->lex.current_line = $2->line_number; /* block code */ unuse_modules(Pike_compiler->num_used_modules - $<number>1); $5 = pop_local_variables($<number>4, $5); debug_malloc_touch($5); $5=mknode(F_COMMA_EXPR,$5,mknode(F_RETURN,mkintnode(0),0)); if (Pike_compiler->compiler_pass == 2) { /* Doing this in pass 1 might induce too strict checks on types * in cases where we got placeholders. */ type=find_return_type($5); if (type) { push_finished_type(type); free_type(type); } else { yywarning("Failed to determine return type for implicit lambda."); push_type(T_ZERO); } } else { /* Tentative return type. */ push_type(T_MIXED); } if (args_used) { /* __ARGS__ is used. */ push_type(T_MIXED); } else { push_type(T_VOID); } push_type(T_MANY); type=compiler_pop_type(); name = get_new_name(NULL); #ifdef LAMBDA_DEBUG fprintf(stderr, "%d: IMPLICIT LAMBDA: %s 0x%08lx 0x%08lx\n", Pike_compiler->compiler_pass, name->str, (long)Pike_compiler->new_program->id, Pike_compiler->local_class_counter-1); #endif /* LAMBDA_DEBUG */ f=dooptcode(name, $5, type, ID_PROTECTED | ID_PRIVATE | ID_INLINE | ID_USED); if(Pike_compiler->compiler_frame->lexical_scope & SCOPE_SCOPED) { $$ = mktrampolinenode(f,Pike_compiler->compiler_frame->previous); } else { $$ = mkidentifiernode(f); } c->lex.current_line = save_line; c->lex.current_file = save_file; free_node ($2); free_string(name); free_type(type); #ifdef PIKE_DEBUG if (Pike_compiler->compiler_frame != $3) { Pike_fatal("Lost track of compiler_frame!\n" " Got: %p (Expected: %p) Previous: %p\n", Pike_compiler->compiler_frame, $3, Pike_compiler->compiler_frame->previous); } #endif pop_compiler_frame(); } ; apply: expr4 open_paren_with_line_info expr_list ')' optional_block { $$ = mkapplynode($1, mknode(F_ARG_LIST, $3, $5)); COPY_LINE_NUMBER_INFO($$, $2); free_node ($2); } | expr4 open_paren_with_line_info error ')' optional_block { $$=mkapplynode($1, $5); free_node ($2); yyerrok; } | expr4 open_paren_with_line_info error TOK_LEX_EOF { yyerror("Missing ')'."); yyerror("Unexpected end of file."); $$=mkapplynode($1, NULL); free_node ($2); } | expr4 open_paren_with_line_info error ';' { yyerror("Missing ')'."); $$=mkapplynode($1, NULL); free_node ($2); } | expr4 open_paren_with_line_info error '}' { yyerror("Missing ')'."); $$=mkapplynode($1, NULL); free_node ($2); } ; implicit_modifiers: { $$ = Pike_compiler->current_modifiers = ID_PROTECTED|ID_INLINE|ID_PRIVATE | (THIS_COMPILATION->lex.pragmas & ID_MODIFIER_MASK); } ; expr4: idents2 | expr5 | expr5 '.' line_number_info TOK_IDENTIFIER { $$=index_node($1,".",$4->u.sval.u.string); COPY_LINE_NUMBER_INFO($$, $3); free_node ($1); free_node ($3); free_node ($4); } ; expr5: literal_expr | catch | gauge | typeof | sscanf | lambda | implicit_modifiers anon_class { $$ = $2; } | implicit_modifiers enum { $$ = $2; } | apply | expr4 open_bracket_with_line_info '*' ']' { $$=mknode(F_AUTO_MAP_MARKER, $1, 0); COPY_LINE_NUMBER_INFO($$, $2); free_node ($2); } | expr4 open_bracket_with_line_info expr0 ']' { $$=mknode(F_INDEX,$1,$3); COPY_LINE_NUMBER_INFO($$, $2); free_node ($2); } | expr4 open_bracket_with_line_info range_bound expected_dot_dot range_bound ']' { $$=mknode(F_RANGE,$1,mknode(':',$3,$5)); COPY_LINE_NUMBER_INFO($$, $2); free_node ($2); } | expr4 TOK_SAFE_START_INDEX line_number_info expr0 ']' { /* A[?X] to ((tmp=A) && tmp[X]) */ if( $1 && ($1->token == F_LOCAL) ) { $$=mknode(F_LAND, copy_node($1), mknode(F_INDEX, $1, $4)); } else { fix_type_field( $1 ); if( $1 && $1->type ) { int temporary; $1->type->refs++; temporary = add_local_name(empty_pike_string, $1->type, 0); Pike_compiler->compiler_frame->variable[temporary].flags |= LOCAL_VAR_IS_USED; $$=mknode(F_LAND, mknode(F_ASSIGN, mklocalnode(temporary,0), $1), mknode(F_INDEX, mklocalnode(temporary,0), $4)); $$ = pop_local_variables(temporary, $$); } else { $$=mknode(F_INDEX, $1,$4); yyerror("Indexing unexpected value."); } } COPY_LINE_NUMBER_INFO($$, $3); free_node ($3); } | expr4 TOK_SAFE_START_INDEX line_number_info range_bound expected_dot_dot range_bound ']' { /* A[?X..Y] to ((tmp=A) && tmp[X..Y]) */ node *range = mknode(':',$4,$6); if( $1 && ($1->token == F_LOCAL ) ) { $$ = mknode( F_LAND, copy_node($1), mknode(F_RANGE, $1, range) ); } else { fix_type_field( $1 ); if( $1 && $1->type ) { int temporary; $1->type->refs++; temporary = add_local_name(empty_pike_string, $1->type, 0); Pike_compiler->compiler_frame->variable[temporary].flags |= LOCAL_VAR_IS_USED; $$=mknode(F_LAND, mknode(F_ASSIGN, mklocalnode(temporary,0), $1), mknode(F_RANGE, mklocalnode(temporary,0), range) ); $$ = pop_local_variables(temporary, $$); } else { $$ = mknode( F_LAND, $1, mknode(F_RANGE,$1,range) ); yyerror("Indexing unexpected value."); } } COPY_LINE_NUMBER_INFO($$, $3); free_node ($3); } | expr4 open_bracket_with_line_info error ']' { $$=$1; free_node ($2); yyerrok; } | expr4 open_bracket_with_line_info error TOK_LEX_EOF { $$=$1; yyerror("Missing ']'."); yyerror("Unexpected end of file."); free_node ($2); } | expr4 open_bracket_with_line_info error ';' {$$=$1; yyerror("Missing ']'."); free_node ($2);} | expr4 open_bracket_with_line_info error '}' {$$=$1; yyerror("Missing ']'."); free_node ($2);} | expr4 open_bracket_with_line_info error ')' {$$=$1; yyerror("Missing ']'."); free_node ($2);} | open_paren_with_line_info comma_expr2 ')' { $$=$2; if ($$) { COPY_LINE_NUMBER_INFO($$, $1); } free_node ($1); } | open_paren_with_line_info error ')' { $$=$1; yyerrok; } | open_paren_with_line_info error TOK_LEX_EOF { $$=$1; yyerror("Missing ')'."); yyerror("Unexpected end of file."); } | open_paren_with_line_info error ';' { $$=$1; yyerror("Missing ')'."); } | open_paren_with_line_info error '}' { $$=$1; yyerror("Missing ')'."); } | expr4 TOK_ARROW line_number_info magic_identifier { $$=mknode(F_ARROW,$1,$4); COPY_LINE_NUMBER_INFO($$, $3); free_node ($3); } | expr4 TOK_SAFE_INDEX line_number_info TOK_IDENTIFIER { /* A?->B to ((tmp=A) && tmp->B) */ int temporary; if( $1 && ($1->token == F_LOCAL) ) { $$=mknode(F_LAND, copy_node($1), mknode(F_ARROW, $1, $4)); } else { fix_type_field( $1 ); if( $1 && $1->type ) { add_ref($1->type); temporary = add_local_name(empty_pike_string, $1->type, 0); Pike_compiler->compiler_frame->variable[temporary].flags |= LOCAL_VAR_IS_USED; $$=mknode(F_LAND, mknode(F_ASSIGN, mklocalnode(temporary,0), $1), mknode(F_ARROW, mklocalnode(temporary,0), $4)); $$ = pop_local_variables(temporary, $$); } else { $$=mknode(F_ARROW, $1,$4); yyerror("Indexing unexpected value."); } } COPY_LINE_NUMBER_INFO($$, $3); free_node ($3); } | expr4 TOK_ARROW line_number_info error {$$=$1; free_node ($3);} ; idents2: idents | TOK_LOCAL_ID TOK_COLON_COLON TOK_IDENTIFIER { if(Pike_compiler->last_identifier) { free_string(Pike_compiler->last_identifier); } copy_shared_string(Pike_compiler->last_identifier, $3->u.sval.u.string); $$ = find_inherited_identifier(Pike_compiler, 0, INHERIT_LOCAL, Pike_compiler->last_identifier); if (!$$) { if (Pike_compiler->compiler_pass == 2) { my_yyerror("%S not defined in local scope.", $3->u.sval.u.string); $$ = 0; } else { $$ = mknode(F_UNDEFINED, 0, 0); } } free_node($3); } | TOK_LOCAL_ID TOK_COLON_COLON bad_identifier { $$=0; } ; literal_expr: string | TOK_NUMBER | TOK_FLOAT { $$=mkfloatnode((FLOAT_TYPE)$1); } | open_paren_with_line_info '{' expr_list close_brace_or_missing ')' { /* FIXME: May eat lots of stack; cf Standards.FIPS10_4.divisions */ $$=mkefuncallnode("aggregate",$3); COPY_LINE_NUMBER_INFO($$, $1); free_node ($1); } | open_paren_with_line_info open_bracket_with_line_info /* Only to avoid shift/reduce conflicts. */ m_expr_list close_bracket_or_missing ')' { /* FIXME: May eat lots of stack; cf Standards.FIPS10_4.divisions */ $$=mkefuncallnode("aggregate_mapping",$3); COPY_LINE_NUMBER_INFO($$, $1); free_node ($1); free_node ($2); } | TOK_MULTISET_START line_number_info expr_list TOK_MULTISET_END { /* FIXME: May eat lots of stack; cf Standards.FIPS10_4.divisions */ $$=mkefuncallnode("aggregate_multiset",$3); COPY_LINE_NUMBER_INFO($$, $2); free_node ($2); } | TOK_MULTISET_START line_number_info expr_list ')' { yyerror("Missing '>'."); $$=mkefuncallnode("aggregate_multiset",$3); COPY_LINE_NUMBER_INFO($$, $2); free_node ($2); } | TOK_MULTISET_START line_number_info error TOK_MULTISET_END { $$=$2; yyerrok; } | TOK_MULTISET_START line_number_info error ')' { yyerror("Missing '>'."); $$=$2; yyerrok; } | TOK_MULTISET_START line_number_info error TOK_LEX_EOF { $$=$2; yyerror("Missing '>)'."); yyerror("Unexpected end of file."); } | TOK_MULTISET_START line_number_info error ';' { $$=$2; yyerror("Missing '>)'."); } | TOK_MULTISET_START line_number_info error '}' { $$=$2; yyerror("Missing '>)'."); } ; idents: low_idents | idents '.' TOK_IDENTIFIER { $$=index_node($1, Pike_compiler->last_identifier?Pike_compiler->last_identifier->str:NULL, $3->u.sval.u.string); free_node($1); if(Pike_compiler->last_identifier) free_string(Pike_compiler->last_identifier); copy_shared_string(Pike_compiler->last_identifier, $3->u.sval.u.string); free_node($3); } | idents '.' bad_identifier {} | idents '.' error {} ; string_or_identifier: TOK_IDENTIFIER | string ; /* Note that the result of this rule is passed both with * the node value (inherit number) and with two global * variables (inherit_state and inherit_depth). * * Note also that inherit number -1 indicates any inherit. */ inherit_specifier: string_or_identifier TOK_COLON_COLON { struct compilation *c = THIS_COMPILATION; struct program_state *state = Pike_compiler; int depth; int e = INHERIT_ALL; inherit_state = NULL; inherit_depth = 0; /* NB: The heuristics here are a bit strange * (all to make it as backward compatible as possible). * * The priority order is as follows: * * 1: Direct inherits in the current class. * * 2: The name of the current class. * * 3: 1 & 2 recursively for surrounding parent classes. * * 4: Indirect inherits in the current class. * * 5: 4 recursively for surrounding parent classes. * * 6: this_program. * * Note that a deep inherit in the current class trumphs * a not so deep inherit in a parent class (but not a * direct inherit in a parent class). To select the deep * inherit in the parent class in this case, prefix it * with the name of the parent class. */ for (depth = 0;; depth++, state = state->previous) { int inh = find_inherit(state->new_program, $1->u.sval.u.string); if (inh && (!inherit_state || (state->new_program->inherits[inh].inherit_level == 1))) { /* Found, and we've either not found anything earlier, * or this is a direct inherit (and the previous * wasn't since we didn't break out of the loop). */ e = inh; inherit_state = state; inherit_depth = depth; if (state->new_program->inherits[inh].inherit_level == 1) { /* Name of direct inherit ==> Done. */ break; } } /* The top-level class does not have a name, so break here. */ if (depth == c->compilation_depth) break; if (ID_FROM_INT (state->previous->new_program, state->parent_identifier)->name == $1->u.sval.u.string) { /* Name of surrounding class ==> Done. */ e = INHERIT_SELF; inherit_state = state; inherit_depth = depth; break; } } if (e < 0) { inherit_state = state; inherit_depth = depth; if ($1->u.sval.u.string == this_program_string || $1->u.sval.u.string == this_string) { inherit_state = Pike_compiler; inherit_depth = 0; e = INHERIT_SELF; } else my_yyerror("No inherit or surrounding class %S.", $1->u.sval.u.string); } free_node($1); $$ = e; } | TOK_GLOBAL TOK_COLON_COLON { struct compilation *c = THIS_COMPILATION; inherit_state = Pike_compiler; for (inherit_depth = 0; inherit_depth < c->compilation_depth; inherit_depth++, inherit_state = inherit_state->previous) {} $$ = INHERIT_GLOBAL; } | inherit_specifier TOK_IDENTIFIER TOK_COLON_COLON { int e = 0; if ($1 < 0) { $1 = INHERIT_SELF; } #if 0 /* FIXME: The inherit modifiers aren't kept. */ if (!(inherit_state->new_program->inherits[$1].flags & ID_PRIVATE)) { #endif /* 0 */ e = find_inherit(inherit_state->new_program->inherits[$1].prog, $2->u.sval.u.string); #if 0 } #endif /* 0 */ if (!e) { if (inherit_state->new_program->inherits[$1].name) { my_yyerror("No such inherit %S::%S.", inherit_state->new_program->inherits[$1].name, $2->u.sval.u.string); } else { my_yyerror("No such inherit %S.", $2->u.sval.u.string); } $$ = INHERIT_ALL; } else { /* We know stuff about the inherit structure... */ $$ = e + $1; } free_node($2); } | inherit_specifier bad_identifier TOK_COLON_COLON { $$ = INHERIT_ALL; } ; low_idents: TOK_IDENTIFIER { if(Pike_compiler->last_identifier) free_string(Pike_compiler->last_identifier); copy_shared_string(Pike_compiler->last_identifier, $1->u.sval.u.string); if(($$=lexical_islocal(Pike_compiler->last_identifier))) { /* done, nothing to do here */ }else if(!($$=find_module_identifier(Pike_compiler->last_identifier,1)) && !($$ = program_magic_identifier (Pike_compiler, 0, -1, Pike_compiler->last_identifier, 0))) { if((Pike_compiler->flags & COMPILATION_FORCE_RESOLVE) || (Pike_compiler->compiler_pass==2)) { my_yyerror("Undefined identifier %S.", Pike_compiler->last_identifier); /* FIXME: Add this identifier as a constant in the current program to * avoid multiple reporting of the same identifier. * NOTE: This should then only be done in the second pass. */ $$=0; }else{ $$=mknode(F_UNDEFINED,0,0); } } free_node($1); } | '.' TOK_IDENTIFIER { struct pike_string *dot; MAKE_CONST_STRING(dot, "."); if (call_handle_import(dot)) { node *tmp=mkconstantsvaluenode(Pike_sp-1); pop_stack(); $$=index_node(tmp, ".", $2->u.sval.u.string); free_node(tmp); } else $$=mknewintnode(0); if(Pike_compiler->last_identifier) free_string(Pike_compiler->last_identifier); copy_shared_string(Pike_compiler->last_identifier, $2->u.sval.u.string); free_node($2); } | TOK_GLOBAL '.' TOK_IDENTIFIER { $$ = resolve_identifier ($3->u.sval.u.string); if(Pike_compiler->last_identifier) free_string(Pike_compiler->last_identifier); copy_shared_string(Pike_compiler->last_identifier, $3->u.sval.u.string); free_node ($3); } | TOK_RESERVED { ref_push_string($1->u.sval.u.string); low_yyreport(REPORT_ERROR, NULL, 0, parser_system_string, 1, "Unknown reserved symbol %s."); free_node($1); $$ = 0; } | TOK_PREDEF TOK_COLON_COLON TOK_IDENTIFIER { struct compilation *c = THIS_COMPILATION; node *tmp2; if(Pike_compiler->last_identifier) free_string(Pike_compiler->last_identifier); copy_shared_string(Pike_compiler->last_identifier, $3->u.sval.u.string); tmp2 = mkconstantsvaluenode(&c->default_module); $$ = index_node(tmp2, "predef", $3->u.sval.u.string); if(!$$->name) add_ref( $$->name=$3->u.sval.u.string ); free_node(tmp2); free_node($3); } | TOK_PREDEF TOK_COLON_COLON bad_identifier { $$=0; } | TOK_VERSION TOK_COLON_COLON TOK_IDENTIFIER { $$ = find_versioned_identifier($3->u.sval.u.string, $1->u.integer.a, $1->u.integer.b); free_node($1); free_node($3); } | TOK_VERSION TOK_COLON_COLON bad_identifier { free_node($1); $$=0; } | inherit_specifier TOK_IDENTIFIER { int id; if(Pike_compiler->last_identifier) free_string(Pike_compiler->last_identifier); copy_shared_string(Pike_compiler->last_identifier, $2->u.sval.u.string); $$ = find_inherited_identifier(inherit_state, inherit_depth, $1, Pike_compiler->last_identifier); if (!$$) { if ((Pike_compiler->flags & COMPILATION_FORCE_RESOLVE) || (Pike_compiler->compiler_pass == 2)) { if (($1 >= 0) && inherit_state->new_program->inherits[$1].name) { my_yyerror("Undefined identifier %S::%S.", inherit_state->new_program->inherits[$1].name, Pike_compiler->last_identifier); } else { my_yyerror("Undefined identifier %S.", Pike_compiler->last_identifier); } $$=0; } else $$=mknode(F_UNDEFINED,0,0); } free_node($2); } | inherit_specifier bad_identifier { $$=0; } | inherit_specifier error { $$=0; } | TOK_COLON_COLON TOK_IDENTIFIER { if(Pike_compiler->last_identifier) { free_string(Pike_compiler->last_identifier); } copy_shared_string(Pike_compiler->last_identifier, $2->u.sval.u.string); $$ = find_inherited_identifier(Pike_compiler, 0, INHERIT_ALL, Pike_compiler->last_identifier); if(!$$) { if (Pike_compiler->compiler_pass == 2) { my_yyerror("Undefined identifier ::%S.", $2->u.sval.u.string); } $$=mkintnode(0); } free_node($2); } | TOK_COLON_COLON bad_identifier { $$=0; } ; range_bound: /* empty */ {$$ = mknode (F_RANGE_OPEN, NULL, NULL);} | comma_expr {$$ = mknode (F_RANGE_FROM_BEG, $1, NULL);} | '<' comma_expr {$$ = mknode (F_RANGE_FROM_END, $2, NULL);} | TOK_LEX_EOF { yyerror("Unexpected end of file."); $$ = mknode (F_RANGE_OPEN, NULL, NULL); } | '<' TOK_LEX_EOF { yyerror("Unexpected end of file."); $$ = mknode (F_RANGE_OPEN, NULL, NULL); } ; gauge: TOK_GAUGE catch_arg { $$=mkopernode("`/", mkopernode("`-", mkopernode("`-", mkefuncallnode("gethrvtime", mkintnode(1)), mknode(F_COMMA_EXPR, mknode(F_POP_VALUE, $2, NULL), mkefuncallnode("gethrvtime", mkintnode(1)))), NULL), mkfloatnode((FLOAT_TYPE)1e9)); }; typeof: TOK_TYPEOF '(' expr0 ')' { struct pike_type *t; node *tmp; /* FIXME: Why build the node at all? */ /* Because the optimizer cannot optimize the root node of the * tree properly -Hubbe */ tmp=mknode(F_COMMA_EXPR, $3, 0); optimize_node(tmp); t=(tmp && CAR(tmp) && CAR(tmp)->type ? CAR(tmp)->type : mixed_type_string); $$ = mktypenode(t); free_node(tmp); } | TOK_TYPEOF '(' error ')' { $$=0; yyerrok; } | TOK_TYPEOF '(' error '}' { $$=0; yyerror("Missing ')'."); } | TOK_TYPEOF '(' error TOK_LEX_EOF { $$=0; yyerror("Missing ')'."); yyerror("Unexpected end of file."); } | TOK_TYPEOF '(' error ';' { $$=0; yyerror("Missing ')'."); } ; catch_arg: '(' comma_expr ')' { $$=$2; } | '(' error ')' { $$=0; yyerrok; } | '(' error TOK_LEX_EOF { $$=0; yyerror("Missing ')'."); yyerror("Unexpected end of file."); } | '(' error '}' { $$=0; yyerror("Missing ')'."); } | '(' error ';' { $$=0; yyerror("Missing ')'."); } | block | error { $$=0; yyerror("Bad expression for catch."); } ; catch: TOK_CATCH { Pike_compiler->catch_level++; } catch_arg { $$=mknode(F_CATCH,$3,NULL); Pike_compiler->catch_level--; } ; sscanf: TOK_SSCANF '(' expr0 ',' expr0 lvalue_list ')' { if ($6 && !(THIS_COMPILATION->lex.pragmas & ID_STRICT_TYPES)) { mark_lvalues_as_used($6); } $$=mknode(F_SSCANF,mknode(F_ARG_LIST,$3,$5),$6); } | TOK_SSCANF '(' expr0 ',' expr0 error ')' { $$=0; free_node($3); free_node($5); yyerrok; } | TOK_SSCANF '(' expr0 ',' expr0 error TOK_LEX_EOF { $$=0; free_node($3); free_node($5); yyerror("Missing ')'."); yyerror("Unexpected end of file."); } | TOK_SSCANF '(' expr0 ',' expr0 error '}' { $$=0; free_node($3); free_node($5); yyerror("Missing ')'."); } | TOK_SSCANF '(' expr0 ',' expr0 error ';' { $$=0; free_node($3); free_node($5); yyerror("Missing ')'."); } | TOK_SSCANF '(' expr0 error ')' { $$=0; free_node($3); yyerrok; } | TOK_SSCANF '(' expr0 error TOK_LEX_EOF { $$=0; free_node($3); yyerror("Missing ')'."); yyerror("Unexpected end of file."); } | TOK_SSCANF '(' expr0 error '}' { $$=0; free_node($3); yyerror("Missing ')'."); } | TOK_SSCANF '(' expr0 error ';' { $$=0; free_node($3); yyerror("Missing ')'."); } | TOK_SSCANF '(' error ')' { $$=0; yyerrok; } | TOK_SSCANF '(' error TOK_LEX_EOF { $$=0; yyerror("Missing ')'."); yyerror("Unexpected end of file."); } | TOK_SSCANF '(' error '}' { $$=0; yyerror("Missing ')'."); } | TOK_SSCANF '(' error ';' { $$=0; yyerror("Missing ')'."); } ; lvalue: expr4 | open_bracket_with_line_info low_lvalue_list ']' { $$=mknode(F_ARRAY_LVALUE, $2,0); COPY_LINE_NUMBER_INFO($$, $1); free_node($1); } | type2 TOK_IDENTIFIER { int id = add_local_name($2->u.sval.u.string,compiler_pop_type(),0); /* Note: Variable intentionally not marked as used. */ if (id >= 0) $$=mklocalnode(id,-1); else $$ = 0; free_node($2); } /* FIXME: Add production for type2 ==> constant type svalue here? */ | bad_expr_ident { $$=mknewintnode(0); } ; low_lvalue_list: lvalue lvalue_list { $$=mknode(F_LVALUE_LIST,$1,$2); } ; lvalue_list: /* empty */ { $$ = 0; } | ',' lvalue lvalue_list { $$ = mknode(F_LVALUE_LIST,$2,$3); } ; string_segment: TOK_STRING | TOK_FUNCTION_NAME { struct compiler_frame *f = Pike_compiler->compiler_frame; if (!f || (f->current_function_number < 0)) { $$ = mkstrnode(lfun_strings[LFUN___INIT]); } else { struct identifier *id = ID_FROM_INT(Pike_compiler->new_program, f->current_function_number); if (!id->name->size_shift) { int len; if ((len = strlen(id->name->str)) == id->name->len) { /* Most common case. */ $$ = mkstrnode(id->name); } else { struct pike_string *str = make_shared_binary_string(id->name->str, len); $$ = mkstrnode(str); free_string(str); } } else { struct pike_string *str; struct array *split; MAKE_CONST_STRING(str, "\0"); split = explode(id->name, str); $$ = mkstrnode(split->item->u.string); free_array(split); } } } ; string: string_segment | string string_segment { struct pike_string *a,*b; copy_shared_string(a,$1->u.sval.u.string); copy_shared_string(b,$2->u.sval.u.string); free_node($1); free_node($2); a=add_and_free_shared_strings(a,b); $$=mkstrnode(a); free_string(a); } ; string_constant: string | string_constant '+' string { struct pike_string *a,*b; copy_shared_string(a,$1->u.sval.u.string); copy_shared_string(b,$3->u.sval.u.string); free_node($1); free_node($3); a=add_and_free_shared_strings(a,b); $$=mkstrnode(a); free_string(a); } ; /* Same as string_constant above, but without TOK_FUNCTION_NAME. */ real_string_constant: TOK_STRING | real_string_constant TOK_STRING { struct pike_string *a,*b; copy_shared_string(a,$1->u.sval.u.string); copy_shared_string(b,$2->u.sval.u.string); free_node($1); free_node($2); a=add_and_free_shared_strings(a,b); $$=mkstrnode(a); free_string(a); } | real_string_constant '+' TOK_STRING { struct pike_string *a,*b; copy_shared_string(a,$1->u.sval.u.string); copy_shared_string(b,$3->u.sval.u.string); free_node($1); free_node($3); a=add_and_free_shared_strings(a,b); $$=mkstrnode(a); free_string(a); } ; /* * Some error-handling */ /* FIXME: Should probably set Pike_compiler->last_identifier. */ bad_identifier: bad_expr_ident | TOK_ARRAY_ID { yyerror_reserved("array"); } | TOK_ATTRIBUTE_ID { yyerror_reserved("__attribute__"); } | TOK_CLASS { yyerror_reserved("class"); } | TOK_DEPRECATED_ID { yyerror_reserved("__deprecated__"); } | TOK_ENUM { yyerror_reserved("enum"); } | TOK_FLOAT_ID { yyerror_reserved("float");} | TOK_FUNCTION_ID { yyerror_reserved("function");} | TOK_FUNCTION_NAME { yyerror_reserved("__FUNCTION__");} | TOK_INT_ID { yyerror_reserved("int"); } | TOK_MAPPING_ID { yyerror_reserved("mapping"); } | TOK_MIXED_ID { yyerror_reserved("mixed"); } | TOK_MULTISET_ID { yyerror_reserved("multiset"); } | TOK_OBJECT_ID { yyerror_reserved("object"); } | TOK_PROGRAM_ID { yyerror_reserved("program"); } | TOK_STRING_ID { yyerror_reserved("string"); } | TOK_TYPEDEF { yyerror_reserved("typedef"); } | TOK_VOID_ID { yyerror_reserved("void"); } | TOK_RESERVED { ref_push_string($1->u.sval.u.string); low_yyreport(REPORT_ERROR, NULL, 0, parser_system_string, 1, "Unknown reserved symbol %s."); free_node($1); } ; bad_expr_ident: TOK_INLINE { yyerror_reserved("inline"); } | TOK_LOCAL_ID { yyerror_reserved("local"); } | TOK_PREDEF { yyerror_reserved("predef"); } | TOK_PRIVATE { yyerror_reserved("private"); } | TOK_PROTECTED { yyerror_reserved("protected"); } | TOK_PUBLIC { yyerror_reserved("public"); } | TOK_OPTIONAL { yyerror_reserved("optional"); } | TOK_VARIANT { yyerror_reserved("variant"); } | TOK_WEAK { yyerror_reserved("__weak__"); } | TOK_STATIC { yyerror_reserved("static"); } | TOK_EXTERN { yyerror_reserved("extern"); } | TOK_FINAL_ID { yyerror_reserved("final");} | TOK_DO { yyerror_reserved("do"); } | TOK_ELSE { yyerror("else without if."); } | TOK_RETURN { yyerror_reserved("return"); } | TOK_IMPORT { yyerror_reserved("import"); } | TOK_INHERIT { yyerror_reserved("inherit"); } | TOK_CATCH { yyerror_reserved("catch"); } | TOK_GAUGE { yyerror_reserved("gauge"); } | TOK_LAMBDA { yyerror_reserved("lambda"); } | TOK_SSCANF { yyerror_reserved("sscanf"); } | TOK_SWITCH { yyerror_reserved("switch"); } | TOK_TYPEOF { yyerror_reserved("typeof"); } | TOK_BREAK { yyerror_reserved("break"); } | TOK_CASE { yyerror_reserved("case"); } | TOK_CONTINUE { yyerror_reserved("continue"); } | TOK_DEFAULT { yyerror_reserved("default"); } | TOK_FOR { yyerror_reserved("for"); } | TOK_FOREACH { yyerror_reserved("foreach"); } | TOK_IF { yyerror_reserved("if"); } ; /* * Kludge for bison 1.50. * * Bison 1.50 doesn't support having multiple action blocks * in a sequence where a block refers to the value of its * immediate predecessor. */ /* empty: ; */ /* line_number_info is now used in these cases. */ %% static void yyerror_reserved(const char *keyword) { my_yyerror("%s is a reserved word.", keyword); } static struct pike_string *get_new_name(struct pike_string *prefix) { char buf[40]; /* Generate a name for a global symbol... */ sprintf(buf,"__lambda_%ld_%ld_line_%d", (long)Pike_compiler->new_program->id, (long)(Pike_compiler->local_class_counter++ & 0xffffffff), /* OSF/1 cc bug. */ (int) THIS_COMPILATION->lex.current_line); if (prefix) { struct string_builder sb; init_string_builder_alloc(&sb, prefix->len + strlen(buf) + 1, prefix->size_shift); string_builder_shared_strcat(&sb, prefix); string_builder_putchar(&sb, 0); string_builder_strcat(&sb, buf); return finish_string_builder(&sb); } return make_shared_string(buf); } static int low_islocal(struct compiler_frame *f, struct pike_string *str) { int e; for(e=f->current_number_of_locals-1;e>=0;e--) if(f->variable[e].name==str) { f->variable[e].flags |= LOCAL_VAR_IS_USED; return e; } return -1; } /* Add a local variable to the current function in frame. * NOTE: Steals the references to type and def, but not to str. */ int low_add_local_name(struct compiler_frame *frame, struct pike_string *str, struct pike_type *type, node *def) { if (str->len) { int tmp=low_islocal(frame,str); if(tmp>=0 && tmp >= frame->last_block_level) { my_yyerror("Duplicate local variable %S, " "previous declaration on line %d\n", str, frame->variable[tmp].line); } if(type == void_type_string) { my_yyerror("Local variable %S is void.\n", str); } } debug_malloc_touch(def); debug_malloc_touch(type); debug_malloc_touch(str); /* NOTE: The number of locals can be 0..255 (not 256), due to * the use of READ_INCR_BYTE() in apply_low.h. */ if (frame->current_number_of_locals == MAX_LOCAL-1) { my_yyerror("Too many local variables: no space for local variable %S.", str); free_type(type); if (def) free_node(def); return -1; } else { int var = frame->current_number_of_locals; if (pike_types_le(type, void_type_string)) { if (Pike_compiler->compiler_pass != 1) { yywarning("Declaring local variable %S with type void " "(converted to type zero).", str); } free_type(type); copy_pike_type(type, zero_type_string); } frame->variable[var].type = type; frame->variable[var].name = str; reference_shared_string(str); frame->variable[var].def = def; frame->variable[var].line = THIS_COMPILATION->lex.current_line; copy_shared_string(frame->variable[var].file, THIS_COMPILATION->lex.current_file); if (pike_types_le(void_type_string, type)) { /* Don't warn about unused voidable variables. */ frame->variable[var].flags = LOCAL_VAR_IS_USED; } else { frame->variable[var].flags = 0; } frame->current_number_of_locals++; if(frame->current_number_of_locals > frame->max_number_of_locals) { frame->max_number_of_locals = frame->current_number_of_locals; } return var; } } /* argument must be a shared string */ /* Note that this function eats a reference to 'type' */ /* If def is nonzero, it also eats a ref to def */ int add_local_name(struct pike_string *str, struct pike_type *type, node *def) { return low_add_local_name(Pike_compiler->compiler_frame, str, type, def); } /* Mark local variables declared in a multi-assign or sscanf expression * as used. */ static void mark_lvalues_as_used(node *n) { while (n && n->token == F_LVALUE_LIST) { if (!CAR(n)) { /* Can happen if a variable hasn't been declared. */ } else if (CAR(n)->token == F_ARRAY_LVALUE) { mark_lvalues_as_used(CAAR(n)); } else if ((CAR(n)->token == F_LOCAL) && !(CAR(n)->u.integer.b)) { Pike_compiler->compiler_frame->variable[CAR(n)->u.integer.a].flags |= LOCAL_VAR_IS_USED; } n = CDR(n); } } #if 0 /* Note that this function eats a reference to each of * 'type' and 'initializer', but not to 'name'. * Note also that 'initializer' may be NULL. */ static node *add_protected_variable(struct pike_string *name, struct pike_type *type, int depth, node *initializer) { struct compiler_frame *f = Pike_compiler->compiler_frame; int i; int id; node *n = NULL; if (initializer) { /* FIXME: We need to pop levels off local and external variables here. */ } for(i = depth; f && i; i--) { f->lexical_scope |= SCOPE_SCOPED; f = f->previous; } if (!f) { int parent_depth = i; struct program_state *p = Pike_compiler; struct pike_string *tmp_name; while (i--) { if (!p->previous) { my_yyerror("Too many levels of protected (%d, max:%d).", depth, depth - (i+1)); parent_depth -= i+1; break; } p->new_program->flags |= PROGRAM_USES_PARENT; p = p->previous; } tmp_name = get_new_name(name); id = define_parent_variable(p, tmp_name, type, ID_PROTECTED|ID_PRIVATE|ID_INLINE); free_string(tmp_name); if (id >= 0) { if (def) { p->init_node = mknode(F_COMMA_EXPR, Pike_compiler->init_node, mkcastnode(void_type_string, mknode(F_ASSIGN, mkidentifiernode(id), initializer))); initializer = NULL; } n = mkexternalnode(id, parent_depth); } } else if (depth) { f->lexical_scope|=SCOPE_SCOPE_USED; tmp_name = get_new_name(name); id = low_add_local_name(f, tmp_name, type, NULL); free_string(tmp_name); if(f->min_number_of_locals < id+1) f->min_number_of_locals = id+1; if (initializer) { /* FIXME! */ yyerror("Initializers not yet supported for protected variables with function scope."); } n = mklocalnode(id, depth); } id = add_local_name(name, type, n); if (id >= 0) { if (initializer) { return mknode(F_ASSIGN, mklocalnode(id,0), initializer); } return mklocalnode(id, 0); } if (initializer) { free_node(initializer); } return NULL; } #endif /* 0 */ int islocal(struct pike_string *str) { return low_islocal(Pike_compiler->compiler_frame, str); } /* argument must be a shared string */ static node *lexical_islocal(struct pike_string *str) { int e,depth=0; struct compiler_frame *f=Pike_compiler->compiler_frame; while(1) { for(e=f->current_number_of_locals-1;e>=0;e--) { if(f->variable[e].name==str) { struct compiler_frame *q=Pike_compiler->compiler_frame; f->variable[e].flags |= LOCAL_VAR_IS_USED; while(q!=f) { q->lexical_scope|=SCOPE_SCOPED; q=q->previous; } if(depth) { q->lexical_scope|=SCOPE_SCOPE_USED; if(q->min_number_of_locals < e+1) q->min_number_of_locals = e+1; q->variable[e].flags |= LOCAL_VAR_USED_IN_SCOPE; } if(f->variable[e].def) { /*fprintf(stderr, "Found prior definition of \"%s\"\n", str->str); */ return copy_node(f->variable[e].def); } return mklocalnode(e,depth); } } if(!(f->lexical_scope & SCOPE_LOCAL)) return 0; depth++; f=f->previous; } } static node *safe_inc_enum(node *n) { JMP_BUF recovery; node *ret; STACK_LEVEL_START(0); if (SETJMP(recovery)) { handle_compile_exception ("Bad implicit enum value (failed to add 1)."); push_int(0); } else { if (n->token != F_CONSTANT) Pike_fatal("Bad node to safe_inc_enum().\n"); push_svalue(&n->u.sval); push_int(1); f_add(2); } UNSETJMP(recovery); STACK_LEVEL_DONE(1); free_node(n); ret = mkconstantsvaluenode(Pike_sp-1); pop_stack(); return ret; } static node *find_versioned_identifier(struct pike_string *identifier, int major, int minor) { struct compilation *c = THIS_COMPILATION; int old_major = Pike_compiler->compat_major; int old_minor = Pike_compiler->compat_minor; struct svalue *efun = NULL; /* NOTE: Compilers warn about res being globbered by the setjmp,longjmp * below. This warning is spurious because pop_stack() does not actually * do the longjmp, instead f_index() does. */ node *res = NULL; change_compiler_compatibility(major, minor); if(Pike_compiler->last_identifier) free_string(Pike_compiler->last_identifier); copy_shared_string(Pike_compiler->last_identifier, identifier); /* Check predef:: first, and then the modules. */ if (TYPEOF(c->default_module) == T_MAPPING) { if ((efun = low_mapping_string_lookup(c->default_module.u.mapping, identifier))) res = mkconstantsvaluenode(efun); } else if (TYPEOF(c->default_module) != T_INT) { JMP_BUF tmp; if (SETJMP (tmp)) { handle_compile_exception ("Couldn't index %d.%d " "default module with \"%S\".", major, minor, identifier); } else { push_svalue(&c->default_module); ref_push_string(identifier); f_index (2); if (!IS_UNDEFINED(Pike_sp - 1)) res = mkconstantsvaluenode(Pike_sp - 1); pop_stack(); } UNSETJMP(tmp); } if (!res && !(res = resolve_identifier(identifier))) { if((Pike_compiler->flags & COMPILATION_FORCE_RESOLVE) || (Pike_compiler->compiler_pass==2)) { my_yyerror("Undefined identifier %d.%d::%S.", major, minor, identifier); }else{ res = mknode(F_UNDEFINED, 0, 0); } } change_compiler_compatibility(old_major, old_minor); return res; } static int call_handle_import(struct pike_string *s) { struct compilation *c = THIS_COMPILATION; int args; ref_push_string(s); ref_push_string(c->lex.current_file); if (c->handler && c->handler->prog) { ref_push_object(c->handler); args = 3; } else args = 2; if (safe_apply_handler("handle_import", c->handler, c->compat_handler, args, BIT_MAPPING|BIT_OBJECT|BIT_PROGRAM|BIT_ZERO)) if (TYPEOF(Pike_sp[-1]) != T_INT) return 1; else { pop_stack(); my_yyerror("Couldn't find module to import: %S", s); } else handle_compile_exception ("Error finding module to import"); return 0; } /* Set compiler_frame->current_type from the type stack. */ static void update_current_type() { if(Pike_compiler->compiler_frame->current_type) free_type(Pike_compiler->compiler_frame->current_type); Pike_compiler->compiler_frame->current_type = compiler_pop_type(); }

pike.git/ src/ language.yacc > 662dda5badbd9770282772ed9c4fd684ff1ca3e2 [Annotate]