pike.git/src/language.yacc:de4a0c951d7e05ca16fb68406411766b7e721d8a

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4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 /* -*- 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. || $Id: language.yacc,v 1.315 2003/02/08 03:49:22 mast Exp $ */ %pure_parser %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_BREAK %token TOK_CASE %token TOK_CLASS %token TOK_COLON_COLON %token TOK_CONTINUE %token TOK_DEFAULT %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_IF %token TOK_IMPORT %token TOK_INHERIT %token TOK_INLINE %token TOK_LOCAL_ID %token TOK_FINAL_ID %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_NO_MASK %token TOK_OBJECT_ID %token TOK_OR_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_VOID_ID %token TOK_WHILE %token TOK_XOR_EQ %token TOK_OPTIONAL %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 '~' %nonassoc TOK_INC TOK_DEC %{ /* This is the grammar definition of Pike. */ #include "global.h" RCSID("$Id: language.yacc,v 1.315 2003/02/08 03:49:22 mast Exp $"); #ifdef HAVE_MEMORY_H #include <memory.h> #endif #include "interpret.h" #include "array.h" #include "object.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 "machine.h" #include "main.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 */ 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 node *lexical_islocal(struct pike_string *); static void safe_inc_enum(void); static int call_handle_import(struct pike_string *s); 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; } %{ /* Needs to be included after YYSTYPE is defined. */ #include "lex.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_NO_MASK %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_SWITCH %type <number> TOK_VOID_ID %type <number> TOK_WHILE %type <number> arguments %type <number> arguments2 %type <number> func_args %type <number> optional_create_arguments %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> 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_stars %type <number> force_resolve %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> simple_type %type <n> simple_type2 %type <n> simple_identifier_type %type <n> string_constant %type <n> string %type <n> TOK_STRING %type <n> TOK_NUMBER %type <n> optional_rename_inherit %type <n> optional_identifier %type <n> TOK_IDENTIFIER %type <n> assoc_pair %type <n> block %type <n> optional_block %type <n> failsafe_block %type <n> close_paren_or_missing %type <n> block_or_semi %type <n> break %type <n> case %type <n> catch %type <n> catch_arg %type <n> class %type <n> enum %type <n> safe_comma_expr %type <n> comma_expr %type <n> comma_expr2 %type <n> comma_expr_or_maxint %type <n> comma_expr_or_zero %type <n> cond %type <n> continue %type <n> default %type <n> do %type <n> safe_expr0 %type <n> expr00 %type <n> expr01 %type <n> expr1 %type <n> expr2 %type <n> expr3 expr0 %type <n> expr4 %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> local_name_list %type <n> local_name_list2 %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> new_local_name2 %type <n> normal_label_statement %type <n> optional_else_part %type <n> optional_label %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> local_function %type <n> local_function2 %type <n> magic_identifier %type <n> simple_identifier %type <n> foreach_lvalues %type <n> foreach_optional_lvalue %% all: program { YYACCEPT; } | program TOK_LEX_EOF { YYACCEPT; } /* | error TOK_LEX_EOF { YYABORT; } */ ; program: program def | program ';' | /* empty */ ; 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); $$=mkstrnode(a); free_string(a); } ; optional_rename_inherit: ':' TOK_IDENTIFIER { $$=$2; } | ':' bad_identifier { $$=0; } | ':' error { $$=0; } | { $$=0; } ; force_resolve: /* empty */ { $$=force_resolve; force_resolve=1; #ifdef FORCE_RESOLVE_DEBUG fputs("force_resolve on\n", stderr); #endif } ; /* 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)) { $$=mksvaluenode(Pike_sp-1); pop_stack(); } else $$=mknewintnode(0); if($$->name) free_string($$->name); add_ref( $$->name=Pike_sp[-1].u.string ); free_node($1); STACK_LEVEL_DONE(1); } | idents { STACK_LEVEL_START(0); if(Pike_compiler->last_identifier) { ref_push_string(Pike_compiler->last_identifier); }else{ push_constant_text(""); } $$=$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); } ; inheritance: modifiers TOK_INHERIT force_resolve low_program_ref optional_rename_inherit ';' { force_resolve = $3; #ifdef FORCE_RESOLVE_DEBUG fprintf(stderr, "force_resolve restored to %d\n", force_resolve); #endif if (($1 & ID_EXTERN) && (Pike_compiler->compiler_pass == 1)) { yywarning("Extern declared inherit."); } if($4 && !(Pike_compiler->new_program->flags & PROGRAM_PASS_1_DONE)) { struct pike_string *s=Pike_sp[-1].u.string; if($5) s=$5->u.sval.u.string; compiler_do_inherit($4,$1,s); } if($5) free_node($5); pop_stack(); free_node($4); } | modifiers TOK_INHERIT force_resolve low_program_ref error ';' { force_resolve = $3; #ifdef FORCE_RESOLVE_DEBUG fprintf(stderr, "force_resolve restored to %d\n", force_resolve); #endif free_node($4); pop_stack(); yyerrok; } | modifiers TOK_INHERIT force_resolve low_program_ref error TOK_LEX_EOF { force_resolve = $3; #ifdef FORCE_RESOLVE_DEBUG fprintf(stderr, "force_resolve restored to %d\n", force_resolve); #endif free_node($4); pop_stack(); yyerror("Missing ';'."); yyerror("Unexpected end of file."); } | modifiers TOK_INHERIT force_resolve low_program_ref error '}' { force_resolve = $3; #ifdef FORCE_RESOLVE_DEBUG fprintf(stderr, "force_resolve restored to %d\n", force_resolve); #endif free_node($4); 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) && (Pike_compiler->compiler_pass == 1)) { yywarning("Extern declared constant."); } if(!is_const($3)) { if(Pike_compiler->compiler_pass==2) yyerror("Constant definition is not constant."); else 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."); }else{ pop_n_elems(DO_NOT_WARN((INT32)(tmp - 1))); add_constant($1->u.sval.u.string, Pike_sp-1, Pike_compiler->current_modifiers & ~ID_EXTERN); pop_stack(); } } } 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 { $$ = check_node_hash(mknode(F_COMMA_EXPR,$1,mknode(F_RETURN,mkintnode(0),0))); if ($1) $$->line_number = $1->line_number; } | ';' { $$ = NULL; } | TOK_LEX_EOF { yyerror("Expected ';'."); $$ = NULL; } | error { $$ = NULL; } ; type_or_error: simple_type { #ifdef PIKE_DEBUG check_type_string(check_node_hash($1)->u.sval.u.type); #endif /* PIKE_DEBUG */ if(Pike_compiler->compiler_frame->current_type) free_type(Pike_compiler->compiler_frame->current_type); copy_pike_type(Pike_compiler->compiler_frame->current_type, $1->u.sval.u.type); free_node($1); } ; close_paren_or_missing: ')' { /* Used to hold line-number info */ $$ = 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 '}'."); } ; close_bracket_or_missing: ']' | /* empty */ { yyerror("Missing ']'."); } ; push_compiler_frame0: /* empty */ { push_compiler_frame(SCOPE_LOCAL); if(!Pike_compiler->compiler_frame->previous || !Pike_compiler->compiler_frame->previous->current_type) { yyerror("Internal compiler fault."); copy_pike_type(Pike_compiler->compiler_frame->current_type, mixed_type_string); }else{ copy_pike_type(Pike_compiler->compiler_frame->current_type, Pike_compiler->compiler_frame->previous->current_type); } $<number>$ = lex.current_line; } ; def: modifiers type_or_error optional_stars TOK_IDENTIFIER push_compiler_frame0 '(' arguments close_paren_or_missing { int e; /* construct the function type */ push_finished_type(Pike_compiler->compiler_frame->current_type); if ($3 && (Pike_compiler->compiler_pass == 2)) { yywarning("The *-syntax in types is obsolete. Use array instead."); } while(--$3>=0) push_type(T_ARRAY); if(Pike_compiler->compiler_frame->current_return_type) free_type(Pike_compiler->compiler_frame->current_return_type); Pike_compiler->compiler_frame->current_return_type = compiler_pop_type(); push_finished_type(Pike_compiler->compiler_frame->current_return_type); e=$7-1; 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); } { struct pike_type *s=compiler_pop_type(); int i = isidentifier($4->u.sval.u.string); if (Pike_compiler->compiler_pass == 1) { if ($1 & ID_VARIANT) { /* FIXME: Lookup the type of any existing variant */ /* Or the types. */ fprintf(stderr, "Pass %d: Identifier %s:\n", Pike_compiler->compiler_pass, $4->u.sval.u.string->str); if (i >= 0) { struct identifier *id = ID_FROM_INT(Pike_compiler->new_program, i); if (id) { struct pike_type *new_type; fprintf(stderr, "Defined, type:\n"); #ifdef PIKE_DEBUG simple_describe_type(id->type); #endif new_type = or_pike_types(s, id->type, 1); free_type(s); s = new_type; fprintf(stderr, "Resulting type:\n"); #ifdef PIKE_DEBUG simple_describe_type(s); #endif } else { my_yyerror("Lost identifier %s (%d).", $4->u.sval.u.string->str, i); } } else { fprintf(stderr, "Not defined.\n"); } fprintf(stderr, "New type:\n"); #ifdef PIKE_DEBUG simple_describe_type(s); #endif } } else { /* FIXME: Second pass reuses the type from the end of * the first pass if this is a variant function. */ if (i >= 0) { if (Pike_compiler->new_program->identifier_references[i].id_flags & ID_VARIANT) { struct identifier *id = ID_FROM_INT(Pike_compiler->new_program, i); fprintf(stderr, "Pass %d: Identifier %s:\n", Pike_compiler->compiler_pass, $4->u.sval.u.string->str); free_type(s); copy_pike_type(s, id->type); fprintf(stderr, "Resulting type:\n"); #ifdef PIKE_DEBUG simple_describe_type(s); #endif } } else { my_yyerror("Identifier %s lost after first pass.", $4->u.sval.u.string->str); } } $<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(check_node_hash($4)->u.sval.u.string, check_node_hash($<n>$)->u.sval.u.type, $1 & (~ID_EXTERN), IDENTIFIER_PIKE_FUNCTION | (Pike_compiler->varargs?IDENTIFIER_VARARGS:0), 0, OPT_EXTERNAL_DEPEND|OPT_SIDE_EFFECT); Pike_compiler->varargs=0; if ($1 & ID_VARIANT) { fprintf(stderr, "Function number: %d\n", Pike_compiler->compiler_frame->current_function_number); } } } block_or_semi { int e; if($10) { int f; node *check_args = NULL; struct pike_string *save_file = lex.current_file; int save_line = lex.current_line; int num_required_args = 0; struct identifier *i; lex.current_file = $4->current_file; lex.current_line = $4->line_number; if (($1 & ID_EXTERN) && (Pike_compiler->compiler_pass == 1)) { yywarning("Extern declared function definition."); } for(e=0; e<$7; 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 { if (Pike_compiler->compiler_pass == 2) { if ($1 & ID_VARIANT) { struct pike_type *arg_type = Pike_compiler->compiler_frame->variable[e].type; /* FIXME: Generate code that checks the arguments. */ /* If there is a bad argument, call the fallback, and return. */ if (! pike_types_le(void_type_string, arg_type)) { /* Argument my not be void. * ie it's required. */ num_required_args++; } } else { /* 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 = mklocalnode(e, 0); /* The following is needed to go around the optimization in * mksoftcastnode(). */ free_type(local_node->type); copy_pike_type(local_node->type, mixed_type_string); check_args = mknode(F_COMMA_EXPR, check_args, mksoftcastnode(Pike_compiler->compiler_frame->variable[e].type, local_node)); } } } } } if ($1 & ID_VARIANT) { struct pike_string *bad_arg_str; MAKE_CONST_STRING(bad_arg_str, "Bad number of arguments!\n"); fprintf(stderr, "Required args: %d\n", num_required_args); check_args = mknode('?', mkopernode("`<", mkefuncallnode("query_num_arg", NULL), mkintnode(num_required_args)), mknode(':', mkefuncallnode("throw", mkefuncallnode("aggregate", mkstrnode(bad_arg_str))), NULL)); } { int l = $10->line_number; struct pike_string *f = $10->current_file; if (check_args) { /* Prepend the arg checking code. */ $10 = mknode(F_COMMA_EXPR, mknode(F_POP_VALUE, check_args, NULL), $10); } lex.current_line = l; lex.current_file = f; } f=dooptcode(check_node_hash($4)->u.sval.u.string, check_node_hash($10), check_node_hash($<n>9)->u.sval.u.type, $1); i = ID_FROM_INT(Pike_compiler->new_program, f); i->opt_flags = Pike_compiler->compiler_frame->opt_flags; if ($1 & ID_VARIANT) { fprintf(stderr, "Function number: %d\n", f); } #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", $4->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 lex.current_line = save_line; lex.current_file = save_file; } pop_compiler_frame(); free_node($4); free_node($8); free_node($<n>9); } | modifiers type_or_error optional_stars TOK_IDENTIFIER push_compiler_frame0 error { pop_compiler_frame(); free_node($4); } | modifiers type_or_error optional_stars bad_identifier { free_type(compiler_pop_type()); } '(' arguments ')' block_or_semi { if ($9) free_node($9); } | modifiers type_or_error name_list ';' {} | inheritance {} | import {} | constant {} | class { free_node($1); } | enum { free_node($1); } | 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>$=lex.pragmas; lex.pragmas|=$1; } program close_brace_or_eof { 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: type7 optional_dot_dot_dot optional_identifier { 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->str); add_local_name($3->u.sval.u.string, compiler_pop_type(),0); 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."); $$ = $1 + 1; } ; modifier: TOK_NO_MASK { $$ = ID_NOMASK; } | TOK_FINAL_ID { $$ = ID_NOMASK; } | TOK_STATIC { $$ = ID_STATIC; } | TOK_EXTERN { $$ = ID_EXTERN; } | TOK_OPTIONAL { $$ = ID_OPTIONAL; } | TOK_PRIVATE { $$ = ID_PRIVATE | ID_STATIC; } | TOK_LOCAL_ID { $$ = ID_INLINE; } | TOK_PUBLIC { $$ = ID_PUBLIC; } | TOK_PROTECTED { $$ = ID_PROTECTED; } | TOK_INLINE { $$ = ID_INLINE; } | TOK_VARIANT { $$ = ID_VARIANT; } ; magic_identifiers1: TOK_NO_MASK { $$ = "nomask"; } | TOK_FINAL_ID { $$ = "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 { $$ = "variant"; } ; magic_identifiers2: TOK_VOID_ID { $$ = "void"; } | TOK_MIXED_ID { $$ = "mixed"; } | TOK_ARRAY_ID { $$ = "array"; } | TOK_MAPPING_ID { $$ = "mapping"; } | TOK_MULTISET_ID { $$ = "multiset"; } | TOK_OBJECT_ID { $$ = "object"; } | TOK_FUNCTION_ID { $$ = "function"; } | TOK_PROGRAM_ID { $$ = "program"; } | TOK_STRING_ID { $$ = "string"; } | TOK_FLOAT_ID { $$ = "float"; } | TOK_INT_ID { $$ = "int"; } | TOK_ENUM { $$ = "enum"; } | TOK_TYPEDEF { $$ = "typedef"; } ; 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 { $$ = "global"; } ; magic_identifiers: magic_identifiers1 | magic_identifiers2 | magic_identifiers3 ; magic_identifier: TOK_IDENTIFIER | magic_identifiers { struct pike_string *tmp=make_shared_string($1); $$=mkstrnode(tmp); free_string(tmp); } ; modifiers: modifier_list { $$=Pike_compiler->current_modifiers=$1 | (lex.pragmas & ID_MODIFIER_MASK); } ; modifier_list: /* empty */ { $$ = 0; } | modifier modifier_list { $$ = $1 | $2; } ; optional_stars: optional_stars '*' { $$=$1 + 1; } | /* empty */ { $$=0; } ; cast: '(' type ')' { struct pike_type *s = compiler_pop_type(); $$ = mktypenode(s); free_type(s); } ; soft_cast: '[' type ']' { struct pike_type *s = compiler_pop_type(); $$ = mktypenode(s); free_type(s); } ; full_type: type4 | full_type '*' { if (Pike_compiler->compiler_pass == 2) { yywarning("The *-syntax in types is obsolete. Use array instead."); } push_type(T_ARRAY); } ; type6: type | identifier_type ; type: type '*' { if (Pike_compiler->compiler_pass == 2) { yywarning("The *-syntax in types is obsolete. Use array instead."); } push_type(T_ARRAY); } | type2 ; type7: type7 '*' { if (Pike_compiler->compiler_pass == 2) { yywarning("The *-syntax in types is obsolete. Use array instead."); } push_type(T_ARRAY); } | type4 ; simple_type: type4 { struct pike_type *s = compiler_pop_type(); $$ = mktypenode(s); #ifdef PIKE_DEBUG if ($$->u.sval.u.type != s) { Pike_fatal("mktypenode(%p) created node with %p\n", s, $$->u.sval.u.type); } #endif /* PIKE_DEBUG */ free_type(s); } ; simple_type2: type2 { struct pike_type *s = compiler_pop_type(); $$ = mktypenode(s); #ifdef PIKE_DEBUG if ($$->u.sval.u.type != s) { Pike_fatal("mktypenode(%p) created node with %p\n", s, $$->u.sval.u.type); } #endif /* PIKE_DEBUG */ free_type(s); } ; simple_identifier_type: identifier_type { struct pike_type *s = compiler_pop_type(); $$ = mktypenode(s); #ifdef PIKE_DEBUG if ($$->u.sval.u.type != s) { Pike_fatal("mktypenode(%p) created node with %p\n", s, $$->u.sval.u.type); } #endif /* PIKE_DEBUG */ free_type(s); } ; type4: type4 '|' type8 { push_type(T_OR); } | type8 ; type2: type2 '|' type8 { push_type(T_OR); } | basic_type ; type8: basic_type | identifier_type ; basic_type: TOK_FLOAT_ID { push_type(T_FLOAT); } | TOK_VOID_ID { push_type(T_VOID); } | TOK_MIXED_ID { push_type(T_MIXED); } | TOK_STRING_ID { push_type(T_STRING); } | 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_object_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); } ; identifier_type: idents { resolv_constant($1); if (Pike_sp[-1].type == T_TYPE) { /* "typedef" */ push_finished_type(Pike_sp[-1].u.type); } else { /* object type */ struct program *p = NULL; if (Pike_sp[-1].type == T_OBJECT) { if(!Pike_sp[-1].u.object->prog) { pop_stack(); push_int(0); yyerror("Destructed object used as program identifier."); }else{ extern void f_object_program(INT32); int f=FIND_LFUN(Pike_sp[-1].u.object->prog,LFUN_CALL); if(f!=-1) { Pike_sp[-1].subtype=f; Pike_sp[-1].type=T_FUNCTION; }else{ if (Pike_compiler->compiler_pass == 2) { yywarning("Using object as program identifier."); } f_object_program(1); } } } switch(Pike_sp[-1].type) { case T_FUNCTION: if((p = program_from_function(Pike_sp-1))) push_object_type(0, p?(p->id):0); else { struct pike_type *a,*b; a=get_type_of_svalue(Pike_sp-1); b=check_call(function_type_string,a,0); push_finished_type(b); free_type(a); free_type(b); } break; default: if (Pike_compiler->compiler_pass!=1) my_yyerror("Illegal program identifier (type: %s).", get_name_of_type(Pike_sp[-1].type)); 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); } ; number_or_maxint: /* Empty */ { $$ = mkintnode(MAX_INT_TYPE); } | TOK_NUMBER | '-' TOK_NUMBER { #ifdef PIKE_DEBUG if (($2->token != F_CONSTANT) || ($2->u.sval.type != T_INT)) { Pike_fatal("Unexpected number in negative int-range.\n"); } #endif /* PIKE_DEBUG */ $$ = mkintnode(-($2->u.sval.u.integer)); free_node($2); } ; number_or_minint: /* Empty */ { $$ = mkintnode(MIN_INT_TYPE); } | TOK_NUMBER | '-' TOK_NUMBER { #ifdef PIKE_DEBUG if (($2->token != F_CONSTANT) || ($2->u.sval.type != T_INT)) { Pike_fatal("Unexpected number in negative int-range.\n"); } #endif /* PIKE_DEBUG */ $$ = 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); } | '(' 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 ($4->u.sval.type == T_INT) { max = $4->u.sval.u.integer; #ifdef AUTO_BIGNUM } 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(); #endif /* AUTO_BIGNUM */ } } if($2->token == F_CONSTANT) { if ($2->u.sval.type == T_INT) { min = $2->u.sval.u.integer; #ifdef AUTO_BIGNUM } 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(); #endif /* AUTO_BIGNUM */ } } push_int_type(min, max); free_node($2); free_node($4); } ; 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) { if ((Pike_sp[-2].type == T_STRING) && (Pike_sp[-2].u.string->len > 0) && (Pike_sp[-2].u.string->len < 256)) { my_yyerror("Not a valid program specifier: '%s'", Pike_sp[-2].u.string->str); } else { yyerror("Not a valid program specifier."); } } } push_object_type(0, p?(p->id):0); /* Attempt to name the type. */ if (Pike_sp[-2].type == T_STRING) { push_type_name(Pike_sp[-2].u.string); } pop_n_elems(2); } ; 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); } } type7 ')' { 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: type7 { $$=1; } | function_type_list2 ',' { } type7 ; opt_array_type: '(' type7 ')' | { push_type(T_MIXED); } ; opt_mapping_type: '(' { } type7 ':' { } type7 { 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: optional_stars TOK_IDENTIFIER { struct pike_type *type; push_finished_type(Pike_compiler->compiler_frame->current_type); if ($1 && (Pike_compiler->compiler_pass == 2)) { yywarning("The *-syntax in types is obsolete. Use array instead."); } while($1--) push_type(T_ARRAY); type=compiler_pop_type(); define_variable($2->u.sval.u.string, type, Pike_compiler->current_modifiers); free_type(type); free_node($2); } | optional_stars bad_identifier {} | optional_stars TOK_IDENTIFIER '=' { struct pike_type *type; push_finished_type(Pike_compiler->compiler_frame->current_type); if ($1 && (Pike_compiler->compiler_pass == 2)) { yywarning("The *-syntax in types is obsolete. Use array instead."); } while($1--) push_type(T_ARRAY); 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($2->u.sval.u.string, type, Pike_compiler->current_modifiers & (~ID_EXTERN)); free_type(type); } expr0 { Pike_compiler->init_node=mknode(F_COMMA_EXPR,Pike_compiler->init_node, mkcastnode(void_type_string, mknode(F_ASSIGN,$5, mkidentifiernode($<number>4)))); free_node($2); } | optional_stars TOK_IDENTIFIER '=' error { free_node($2); } | optional_stars TOK_IDENTIFIER '=' TOK_LEX_EOF { yyerror("Unexpected end of file in variable definition."); free_node($2); } | optional_stars bad_identifier '=' expr0 { free_node($4); } ; new_local_name: optional_stars TOK_IDENTIFIER { int id; push_finished_type($<n>0->u.sval.u.type); if ($1 && (Pike_compiler->compiler_pass == 2)) { yywarning("The *-syntax in types is obsolete. Use array instead."); } while($1--) push_type(T_ARRAY); id = add_local_name($2->u.sval.u.string, compiler_pop_type(),0); if (id >= 0) $$=mknode(F_ASSIGN,mkintnode(0),mklocalnode(id,0)); else $$ = 0; free_node($2); } | optional_stars bad_identifier { $$=0; } | optional_stars TOK_IDENTIFIER '=' expr0 { int id; push_finished_type($<n>0->u.sval.u.type); if ($1 && (Pike_compiler->compiler_pass == 2)) { yywarning("The *-syntax in types is obsolete. Use array instead."); } while($1--) push_type(T_ARRAY); id = add_local_name($2->u.sval.u.string, compiler_pop_type(),0); if (id >= 0) $$=mknode(F_ASSIGN,$4,mklocalnode(id,0)); else $$ = 0; free_node($2); } | optional_stars bad_identifier '=' expr0 { free_node($4); $$=0; } | optional_stars TOK_IDENTIFIER '=' error { free_node($2); /* No yyerok here since we aren't done yet. */ $$=0; } | optional_stars TOK_IDENTIFIER '=' TOK_LEX_EOF { yyerror("Unexpected end of file in local variable definition."); free_node($2); /* No yyerok here since we aren't done yet. */ $$=0; } ; new_local_name2: TOK_IDENTIFIER { int id; add_ref($<n>0->u.sval.u.type); id = add_local_name($1->u.sval.u.string, $<n>0->u.sval.u.type, 0); if (id >= 0) $$=mknode(F_ASSIGN,mkintnode(0),mklocalnode(id,0)); else $$ = 0; free_node($1); } | bad_identifier { $$=0; } | TOK_IDENTIFIER '=' safe_expr0 { int id; add_ref($<n>0->u.sval.u.type); id = add_local_name($1->u.sval.u.string, $<n>0->u.sval.u.type, 0); if (id >= 0) $$=mknode(F_ASSIGN,$3, mklocalnode(id,0)); else $$ = 0; free_node($1); } | bad_identifier '=' safe_expr0 { $$=$3; } ; block:'{' { $<number>1=Pike_compiler->num_used_modules; $<number>$=Pike_compiler->compiler_frame->current_number_of_locals; } empty { /* Trick to store more than one number on compiler stack - Hubbe */ $<number>$=Pike_compiler->compiler_frame->last_block_level; if($<number>$ == -1) /* if 'first block' */ Pike_compiler->compiler_frame->last_block_level=0; /* all variables */ else Pike_compiler->compiler_frame->last_block_level=$<number>2; } { $<number>$=lex.current_line; } statements end_block { unuse_modules(Pike_compiler->num_used_modules - $<number>1); pop_local_variables($<number>2); Pike_compiler->compiler_frame->last_block_level=$<number>4; if ($6) $6->line_number = $<number>5; $$=$6; } ; end_block: '}' | TOK_LEX_EOF { yyerror("Missing '}'."); yyerror("Unexpected end of file."); } ; failsafe_block: block | error { $$=0; } | TOK_LEX_EOF { yyerror("Unexpected end of file."); $$=0; } ; local_name_list: new_local_name | local_name_list ',' { $<n>$=$<n>0; } new_local_name { $$ = mknode(F_COMMA_EXPR, mkcastnode(void_type_string, $1), $4); } ; local_name_list2: new_local_name2 | local_name_list2 ',' { $<n>$=$<n>0; } new_local_name { $$ = mknode(F_COMMA_EXPR, mkcastnode(void_type_string, $1), $4); } ; 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(DO_NOT_WARN((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); 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 optional_block { if($2) { $$=recursive_add_call_arg($1,$2); }else{ $$=$1; } } ; 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 ; labeled_statement: TOK_IDENTIFIER { $<number>$ = lex.current_line; Pike_compiler->compiler_frame->opt_flags &= ~OPT_CUSTOM_LABELS; } ':' statement { $$ = mknode(Pike_compiler->compiler_frame->opt_flags & OPT_CUSTOM_LABELS ? F_CUSTOM_STMT_LABEL : F_NORMAL_STMT_LABEL, $1, $4); /* FIXME: This won't be correct if the node happens to be shared. * That's an issue to be solved with shared nodes in general, * though. */ $$->line_number = $<number>2; } ; 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); } ; push_compiler_frame1: /* empty */ { push_compiler_frame(SCOPE_LOCAL); $<number>$ = lex.current_line; } ; lambda: TOK_LAMBDA push_compiler_frame1 { 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); } func_args { $<number>$ = Pike_compiler->varargs; Pike_compiler->varargs = 0; } failsafe_block { struct pike_type *type; char buf[80]; int f,e; struct pike_string *name; int save_line = lex.current_line; lex.current_line = $<number>1; debug_malloc_touch($6); $6=mknode(F_COMMA_EXPR,$6,mknode(F_RETURN,mkintnode(0),0)); type=find_return_type($6); if(type) { push_finished_type(type); free_type(type); } else push_type(T_MIXED); e=$4-1; if($<number>5) { 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(); 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) lex.current_line); name=make_shared_string(buf); #ifdef LAMBDA_DEBUG fprintf(stderr, "%d: LAMBDA: %s 0x%08lx 0x%08lx\n", Pike_compiler->compiler_pass, buf, (long)Pike_compiler->new_program->id, Pike_compiler->local_class_counter-1); #endif /* LAMBDA_DEBUG */ if(Pike_compiler->compiler_pass == 2) Pike_compiler->compiler_frame->current_function_number=isidentifier(name); f=dooptcode(name, $6, type, ID_STATIC | ID_PRIVATE | ID_INLINE); #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 { $$ = mkidentifiernode(f); } free_string(name); free_type(type); lex.current_line = save_line; pop_compiler_frame(); } | TOK_LAMBDA push_compiler_frame1 error { pop_compiler_frame(); $$ = mkintnode(0); } ; local_function: TOK_IDENTIFIER push_compiler_frame1 func_args { char buf[40]; struct pike_string *name; struct pike_type *type; int id,e; node *n; struct identifier *i=0; 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, $<n>0->u.sval.u.type); /***/ 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(); /***/ 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) $1->line_number); #ifdef LAMBDA_DEBUG fprintf(stderr, "%d: LAMBDA: %s 0x%08lx 0x%08lx\n", Pike_compiler->compiler_pass, buf, (long)Pike_compiler->new_program->id, Pike_compiler->local_class_counter-1); #endif /* LAMBDA_DEBUG */ name=make_shared_string(buf); if(Pike_compiler->compiler_pass > 1) { id=isidentifier(name); }else{ id=define_function(name, type, ID_INLINE, 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 pike_string *save_file = lex.current_file; int save_line = lex.current_line; lex.current_file = $1->current_file; 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_STATIC | ID_PRIVATE | ID_INLINE); i->opt_flags = Pike_compiler->compiler_frame->opt_flags; lex.current_line = save_line; lex.current_file = save_file; 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>3,Pike_compiler->compiler_frame); }else{ $$ = mkidentifiernode($<number>3); } } } | TOK_IDENTIFIER push_compiler_frame1 error { pop_compiler_frame(); $$=mkintnode(0); } ; local_function2: optional_stars TOK_IDENTIFIER push_compiler_frame1 func_args { char buf[40]; struct pike_string *name; struct pike_type *type; int id,e; node *n; struct identifier *i=0; /***/ debug_malloc_touch(Pike_compiler->compiler_frame->current_return_type); push_finished_type($<n>0->u.sval.u.type); if ($1 && (Pike_compiler->compiler_pass == 2)) { yywarning("The *-syntax in types is obsolete. Use array instead."); } while($1--) push_type(T_ARRAY); if(Pike_compiler->compiler_frame->current_return_type) free_type(Pike_compiler->compiler_frame->current_return_type); Pike_compiler->compiler_frame->current_return_type=compiler_pop_type(); /***/ push_finished_type(Pike_compiler->compiler_frame->current_return_type); e=$4-1; 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(); /***/ 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) $2->line_number); #ifdef LAMBDA_DEBUG fprintf(stderr, "%d: LAMBDA: %s 0x%08lx 0x%08lx\n", Pike_compiler->compiler_pass, buf, (long)Pike_compiler->new_program->id, Pike_compiler->local_class_counter-1); #endif /* LAMBDA_DEBUG */ name=make_shared_string(buf); if(Pike_compiler->compiler_pass > 1) { id=isidentifier(name); }else{ id=define_function(name, type, ID_INLINE, 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, $2->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>5); struct pike_string *save_file = lex.current_file; int save_line = lex.current_line; lex.current_file = $2->current_file; lex.current_line = $2->line_number; debug_malloc_touch($6); $6=mknode(F_COMMA_EXPR,$6,mknode(F_RETURN,mkintnode(0),0)); debug_malloc_touch($6); dooptcode(i->name, $6, i->type, ID_STATIC | ID_PRIVATE | ID_INLINE); i->opt_flags = Pike_compiler->compiler_frame->opt_flags; lex.current_line = save_line; lex.current_file = save_file; pop_compiler_frame(); free_node($2); /* 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>5,Pike_compiler->compiler_frame); }else{ $$ = mkidentifiernode($<number>5); } } } | optional_stars TOK_IDENTIFIER push_compiler_frame1 error { pop_compiler_frame(); free_node($2); $$=mkintnode(0); } ; create_arg: modifiers type_or_error optional_stars optional_dot_dot_dot TOK_IDENTIFIER { struct pike_type *type; if (Pike_compiler->varargs) { yyerror("Can't define more variables after ..."); } push_finished_type(Pike_compiler->compiler_frame->current_type); if ($3 && (Pike_compiler->compiler_pass == 2)) { yywarning("The *-syntax in types is obsolete. Use array instead."); } while($3--) push_type(T_ARRAY); if ($4) { push_type(T_ARRAY); Pike_compiler->varargs = 1; } type=compiler_pop_type(); if(islocal($5->u.sval.u.string) >= 0) my_yyerror("Variable '%s' appears twice in create argument list.", $5->u.sval.u.string->str); /* Add the identifier both globally and locally. */ define_variable($5->u.sval.u.string, type, Pike_compiler->current_modifiers); add_local_name($5->u.sval.u.string, type, 0); /* free_type(type); */ free_node($5); $$=0; } | modifiers type_or_error optional_stars bad_identifier { $$=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 ; push_compiler_frame01: /* empty */ { push_compiler_frame(SCOPE_LOCAL); } ; optional_create_arguments: /* empty */ { $$ = 0; } | '(' push_compiler_frame01 create_arguments close_paren_or_missing { int e; node *create_code = NULL; struct pike_type *type = NULL; struct pike_string *create_string = NULL; int f; MAKE_CONST_STRING(create_string, "create"); /* First: Deduce the type for the create() function. */ push_type(T_VOID); /* Return type. */ e = $3-1; if (Pike_compiler->varargs) { /* Varargs */ 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); for(; e >= 0; 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_STATIC, IDENTIFIER_PIKE_FUNCTION | (Pike_compiler->varargs?IDENTIFIER_VARARGS:0), 0, OPT_SIDE_EFFECT); Pike_compiler->varargs = 0; /* Third: Generate the initialization code. * * global_arg = [type]local_arg; * [,..] */ for(e=0; e<$3; 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);*/ /* The following is needed to go around the optimization in * mksoftcastnode(). */ free_type(local_node->type); copy_pike_type(local_node->type, mixed_type_string); local_node = mksoftcastnode(Pike_compiler->compiler_frame-> variable[e].type, local_node); } create_code = mknode(F_COMMA_EXPR, create_code, mknode(F_ASSIGN, local_node, mkidentifiernode(isidentifier(Pike_compiler-> compiler_frame-> variable[e].name)))); } } /* 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, check_node_hash(create_code), type, ID_STATIC); #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. */ pop_compiler_frame(); free_node($4); free_type(type); } ; failsafe_program: '{' program end_block | error { yyerrok; } | TOK_LEX_EOF { yyerror("End of file where program definition expected."); } ; class: modifiers TOK_CLASS optional_identifier { extern int num_parse_error; int num_errors=Pike_compiler->num_parse_error; 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) $<number>2); s=make_shared_string(buffer); $3=mkstrnode(s); free_string(s); $1|=ID_STATIC | ID_PRIVATE | ID_INLINE; } /* fprintf(stderr, "LANGUAGE.YACC: CLASS start\n"); */ if(Pike_compiler->compiler_pass==1) { if ($1 & ID_EXTERN) { yywarning("Extern declared class definition."); } low_start_new_program(0, $3->u.sval.u.string, $1, &$<number>$); /* fprintf(stderr, "Pass 1: Program %s has id %d\n", $3->u.sval.u.string->str, Pike_compiler->new_program->id); */ if(lex.current_file) { store_linenumber($<number>2, lex.current_file); debug_malloc_name(Pike_compiler->new_program, lex.current_file->str, $<number>2); } }else{ int i; struct identifier *id; int tmp=Pike_compiler->compiler_pass; i=isidentifier($3->u.sval.u.string); if(i<0) { low_start_new_program(Pike_compiler->new_program,0, $1, &$<number>$); yyerror("Pass 2: program not defined!"); }else{ id=ID_FROM_INT(Pike_compiler->new_program, i); if(IDENTIFIER_IS_CONSTANT(id->identifier_flags)) { struct svalue *s; s=&PROG_FROM_INT(Pike_compiler->new_program,i)->constants[id->func.offset].sval; if(s->type==T_PROGRAM) { low_start_new_program(s->u.program, $3->u.sval.u.string, $1, &$<number>$); /* fprintf(stderr, "Pass 2: Program %s has id %d\n", $3->u.sval.u.string->str, Pike_compiler->new_program->id); */ }else{ yyerror("Pass 2: constant redefined!"); low_start_new_program(Pike_compiler->new_program, 0, $1, &$<number>$); } }else{ yyerror("Pass 2: class constant no longer constant!"); low_start_new_program(Pike_compiler->new_program, 0, $1, &$<number>$); } } Pike_compiler->compiler_pass=tmp; } Pike_compiler->num_parse_error=num_errors; /* Kluge to prevent gazillion error messages */ } optional_create_arguments failsafe_program { struct program *p; 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) { yyerror("Class definition failed."); }else{ free_program(p); } $$=mkidentifiernode($<number>4); free_node($3); check_tree($$,0); } ; simple_identifier: TOK_IDENTIFIER | bad_identifier { $$ = 0; } ; enum_value: /* EMPTY */ { safe_inc_enum(); } | '=' safe_expr0 { pop_stack(); /* 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(DO_NOT_WARN((INT32)(tmp - 1))); } } else { push_int(0); } } if($2) free_node($2); } ; enum_def: /* EMPTY */ | simple_identifier enum_value { if ($1) { add_constant($1->u.sval.u.string, Pike_sp-1, (Pike_compiler->current_modifiers & ~ID_EXTERN) | ID_INLINE); } free_node($1); /* 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, 1); free_type(current); free_type(new); type_stack_mark(); push_finished_type(res); free_type(res); } } ; enum_list: enum_def | enum_list ',' enum_def ; enum: modifiers TOK_ENUM { if ((Pike_compiler->current_modifiers & ID_EXTERN) && (Pike_compiler->compiler_pass == 1)) { yywarning("Extern declared enum."); } push_int(-1); /* Last enum-value. */ type_stack_mark(); push_type(T_ZERO); /* Joined type so far. */ } optional_identifier '{' enum_list end_block { struct pike_type *t = pop_unfinished_type(); pop_stack(); 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); } $$ = mktypenode(t); free_type(t); } ; typedef: modifiers TOK_TYPEDEF full_type simple_identifier ';' { struct pike_type *t = compiler_pop_type(); if ((Pike_compiler->current_modifiers & ID_EXTERN) && (Pike_compiler->compiler_pass == 1)) { yywarning("Extern declared typedef."); } if ($4) { ref_push_type_value(t); add_constant($4->u.sval.u.string, Pike_sp-1, (Pike_compiler->current_modifiers & ~ID_EXTERN) | ID_INLINE); pop_stack(); free_node($4); } free_type(t); } ; cond: TOK_IF { $<number>$=Pike_compiler->compiler_frame->current_number_of_locals; } empty { /* Trick to store more than one number on compiler stack - Hubbe */ $<number>$=Pike_compiler->compiler_frame->last_block_level; Pike_compiler->compiler_frame->last_block_level=$<number>2; } '(' safe_comma_expr end_cond statement optional_else_part { int i=lex.current_line; lex.current_line=$1; $$ = mknode('?', $6, mknode(':', mkcastnode(void_type_string, $8), mkcastnode(void_type_string, $9))); $$ = mkcastnode(void_type_string, $$); lex.current_line = i; pop_local_variables($<number>2); Pike_compiler->compiler_frame->last_block_level=$<number>4; } ; 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 | 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 { $<number>$=Pike_compiler->compiler_frame->current_number_of_locals; } empty { /* Trick to store more than one number on compiler stack - Hubbe */ $<number>$=Pike_compiler->compiler_frame->last_block_level; Pike_compiler->compiler_frame->last_block_level=$<number>2; } '(' expr0 foreach_lvalues end_cond statement { if ($7) { $$=mknode(F_FOREACH, mknode(F_VAL_LVAL,$6,$7), $9); $$->line_number=$1; } else { /* Error in lvalue */ free_node($6); $$=$9; } pop_local_variables($<number>2); Pike_compiler->compiler_frame->last_block_level=$<number>4; Pike_compiler->compiler_frame->opt_flags |= OPT_CUSTOM_LABELS; } ; do: TOK_DO statement TOK_WHILE '(' safe_comma_expr end_cond expected_semicolon { $$=mknode(F_DO,$2,$5); $$->line_number=$1; Pike_compiler->compiler_frame->opt_flags |= OPT_CUSTOM_LABELS; } | TOK_DO statement TOK_WHILE TOK_LEX_EOF { $$=0; yyerror("Missing '(' in do-while loop."); yyerror("Unexpected end of file."); } | TOK_DO statement TOK_LEX_EOF { $$=0; yyerror("Missing 'while' in do-while loop."); yyerror("Unexpected end of file."); } ; expected_semicolon: ';' | TOK_LEX_EOF { yyerror("Missing ';'."); yyerror("Unexpected end of file."); } ; for: TOK_FOR { $<number>$=Pike_compiler->compiler_frame->current_number_of_locals; } empty { /* Trick to store more than one number on compiler stack - Hubbe */ $<number>$=Pike_compiler->compiler_frame->last_block_level; Pike_compiler->compiler_frame->last_block_level=$<number>2; } '(' unused expected_semicolon for_expr expected_semicolon unused end_cond statement { int i=lex.current_line; lex.current_line=$1; $$=mknode(F_COMMA_EXPR, mkcastnode(void_type_string, $6), mknode(F_FOR,$8,mknode(':',$12,$10))); lex.current_line=i; pop_local_variables($<number>2); Pike_compiler->compiler_frame->last_block_level=$<number>4; Pike_compiler->compiler_frame->opt_flags |= OPT_CUSTOM_LABELS; } ; while: TOK_WHILE { $<number>$=Pike_compiler->compiler_frame->current_number_of_locals; } empty { /* Trick to store more than one number on compiler stack - Hubbe */ $<number>$=Pike_compiler->compiler_frame->last_block_level; Pike_compiler->compiler_frame->last_block_level=$<number>2; } '(' safe_comma_expr end_cond statement { int i=lex.current_line; lex.current_line=$1; $$=mknode(F_FOR,$6,mknode(':',$8,NULL)); lex.current_line=i; pop_local_variables($<number>2); Pike_compiler->compiler_frame->last_block_level=$<number>4; Pike_compiler->compiler_frame->opt_flags |= OPT_CUSTOM_LABELS; } ; for_expr: /* EMPTY */ { $$=mkintnode(1); } | safe_comma_expr ; switch: TOK_SWITCH { $<number>$=Pike_compiler->compiler_frame->current_number_of_locals; } empty { /* Trick to store more than one number on compiler stack - Hubbe */ $<number>$=Pike_compiler->compiler_frame->last_block_level; Pike_compiler->compiler_frame->last_block_level=$<number>2; } '(' safe_comma_expr end_cond statement { $$=mknode(F_SWITCH,$6,$8); $$->line_number=$1; pop_local_variables($<number>2); Pike_compiler->compiler_frame->last_block_level=$<number>4; } ; 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 { $$=mknode(F_CASE_RANGE,0,$3); } ; expected_colon: ':' | ';' { yyerror("Missing ':'."); } | '}' { yyerror("Missing ':'."); } | TOK_LEX_EOF { yyerror("Missing ':'."); yyerror("Unexpected end of file."); } ; return: TOK_RETURN expected_semicolon { if(!TEST_COMPAT(0,6) && !match_types(Pike_compiler->compiler_frame->current_return_type, void_type_string)) { yyerror("Must return a value for a non-void function."); } $$=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 { $$=$2; free_node($1); } | simple_identifier_type local_name_list2 { $$=$2; free_node($1); } | simple_identifier_type local_function { $$=$2; free_node($1); } | simple_type2 local_function2 { $$=$2; free_node($1); } ; comma_expr2: expr0 | comma_expr2 ',' expr0 { $$ = mknode(F_COMMA_EXPR, mkcastnode(void_type_string, $1), $3); } ; expr00: expr0 | '@' expr0 { $$=mknode(F_PUSH_ARRAY,$2,0); }; expr0: expr01 | expr4 '=' expr0 { $$=mknode(F_ASSIGN,$3,$1); } | expr4 '=' error { $$=$1; reset_type_stack(); yyerrok; } | bad_expr_ident '=' expr0 { $$=$3; } | '[' low_lvalue_list ']' '=' expr0 { $$=mknode(F_ASSIGN,$5,mknode(F_ARRAY_LVALUE,$2,0)); } | expr4 assign expr0 { $$=mknode($2,$1,$3); } | expr4 assign error { $$=$1; reset_type_stack(); yyerrok; } | bad_expr_ident assign expr0 { $$=$3; } | '[' low_lvalue_list ']' assign expr0 { $$=mknode($4,mknode(F_ARRAY_LVALUE,$2,0),$5); } | '[' low_lvalue_list ']' error { $$=$2; reset_type_stack(); yyerrok; } /* | error { $$=0; reset_type_stack(); } */ ; expr01: expr1 | expr1 '?' expr01 ':' expr01 { $$=mknode('?',$1,mknode(':',$3,$5)); } ; assign: TOK_AND_EQ { $$=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{ $$=F_MULT_EQ; } | TOK_MOD_EQ { $$=F_MOD_EQ; } | TOK_DIV_EQ { $$=F_DIV_EQ; } ; optional_comma: { $$=0; } | ',' { $$=1; }; expr_list: { $$=0; } | expr_list2 optional_comma ; expr_list2: expr00 | expr_list2 ',' expr00 { $$=mknode(F_ARG_LIST,$1,$3); } ; m_expr_list: { $$=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 '%' 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 { $$=mkopernode("`!",$2,0); } | '~' expr2 { $$=mkopernode("`~",$2,0); } | '-' expr2 { $$=mkopernode("`-",$2,0); } ; expr3: expr4 | expr4 TOK_INC { $$=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; } | '{' push_compiler_frame0 { 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); /* block code */ $<number>1=Pike_compiler->num_used_modules; $<number>$=Pike_compiler->compiler_frame->current_number_of_locals; } statements end_block expected_semicolon { struct pike_type *type; char buf[40]; int f/*, e */; struct pike_string *name; int save_line = lex.current_line; lex.current_line = $<number>2; /* block code */ unuse_modules(Pike_compiler->num_used_modules - $<number>1); pop_local_variables($<number>3); debug_malloc_touch($4); $4=mknode(F_COMMA_EXPR,$4,mknode(F_RETURN,mkintnode(0),0)); type=find_return_type($4); if(type) { push_finished_type(type); free_type(type); } else push_type(T_MIXED); push_type(T_VOID); push_type(T_MANY); /* e=$4-1; for(; e>=0; e--) push_finished_type(Pike_compiler->compiler_frame->variable[e].type); */ type=compiler_pop_type(); 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) lex.current_line); name=make_shared_string(buf); #ifdef LAMBDA_DEBUG fprintf(stderr, "%d: IMPLICIT LAMBDA: %s 0x%08lx 0x%08lx\n", Pike_compiler->compiler_pass, buf, (long)Pike_compiler->new_program->id, Pike_compiler->local_class_counter-1); #endif /* LAMBDA_DEBUG */ f=dooptcode(name, $4, type, ID_STATIC | ID_PRIVATE | ID_INLINE); if(Pike_compiler->compiler_frame->lexical_scope & SCOPE_SCOPED) { $$ = mktrampolinenode(f,Pike_compiler->compiler_frame->previous); } else { $$ = mkidentifiernode(f); } lex.current_line = save_line; free_string(name); free_type(type); pop_compiler_frame(); } ; expr4: string | TOK_NUMBER | TOK_FLOAT { $$=mkfloatnode((FLOAT_TYPE)$1); } | catch | gauge | typeof | sscanf | lambda | class | enum | idents2 | expr4 '(' expr_list ')' { $$=mkapplynode($1,$3); } | expr4 '(' error ')' { $$=mkapplynode($1, NULL); yyerrok; } | expr4 '(' error TOK_LEX_EOF { yyerror("Missing ')'."); $$=mkapplynode($1, NULL); yyerror("Unexpected end of file."); } | expr4 '(' error ';' { yyerror("Missing ')'."); $$=mkapplynode($1, NULL); } | expr4 '(' error '}' { yyerror("Missing ')'."); $$=mkapplynode($1, NULL); } | expr4 '[' '*' ']' { $$=mknode(F_AUTO_MAP_MARKER, $1, 0); } | expr4 '[' expr0 ']' { $$=mknode(F_INDEX,$1,$3); } | expr4 '[' comma_expr_or_zero expected_dot_dot comma_expr_or_maxint ']' { $$=mknode(F_RANGE,$1,mknode(F_ARG_LIST,$3,$5)); } | expr4 '[' error ']' { $$=$1; yyerrok; } | expr4 '[' error TOK_LEX_EOF { $$=$1; yyerror("Missing ']'."); yyerror("Unexpected end of file."); } | expr4 '[' error ';' { $$=$1; yyerror("Missing ']'."); } | expr4 '[' error '}' { $$=$1; yyerror("Missing ']'."); } | expr4 '[' error ')' { $$=$1; yyerror("Missing ']'."); } | '(' comma_expr2 ')' { $$=$2; } | '(' '{' expr_list close_brace_or_missing ')' { $$=mkefuncallnode("aggregate",$3); } | '(' '[' m_expr_list close_bracket_or_missing ')' { $$=mkefuncallnode("aggregate_mapping",$3); } | TOK_MULTISET_START expr_list TOK_MULTISET_END { $$=mkefuncallnode("aggregate_multiset",$2); } | TOK_MULTISET_START expr_list ')' { yyerror("Missing '>'."); $$=mkefuncallnode("aggregate_multiset",$2); } | '(' error ')' { $$=0; yyerrok; } | '(' error TOK_LEX_EOF { $$=0; yyerror("Missing ')'."); yyerror("Unexpected end of file."); } | '(' error ';' { $$=0; yyerror("Missing ')'."); } | '(' error '}' { $$=0; yyerror("Missing ')'."); } | TOK_MULTISET_START error TOK_MULTISET_END { $$=0; yyerrok; } | TOK_MULTISET_START error ')' { yyerror("Missing '>'."); $$=0; yyerrok; } | TOK_MULTISET_START error TOK_LEX_EOF { $$=0; yyerror("Missing '>)'."); yyerror("Unexpected end of file."); } | TOK_MULTISET_START error ';' { $$=0; yyerror("Missing '>)'."); } | TOK_MULTISET_START error '}' { $$=0; yyerror("Missing '>)'."); } | expr4 TOK_ARROW magic_identifier { $$=mknode(F_ARROW,$1,$3); } | expr4 TOK_ARROW error {} ; idents2: idents | TOK_LOCAL_ID TOK_COLON_COLON TOK_IDENTIFIER { int i; if(Pike_compiler->last_identifier) free_string(Pike_compiler->last_identifier); copy_shared_string(Pike_compiler->last_identifier, $3->u.sval.u.string); if (((i = find_shared_string_identifier(Pike_compiler->last_identifier, Pike_compiler->new_program)) >= 0) || ((i = really_low_find_shared_string_identifier(Pike_compiler->last_identifier, Pike_compiler->new_program, SEE_STATIC| SEE_PRIVATE)) >= 0)) { struct reference *ref = Pike_compiler->new_program->identifier_references + i; if (!TEST_COMPAT (7, 2) && IDENTIFIER_IS_VARIABLE ( ID_FROM_PTR (Pike_compiler->new_program, ref)->identifier_flags)) { /* Allowing local:: on variables would lead to pathological * behavior: If a non-local variable in a class is referenced * both with and without local::, both references would * address the same variable in all cases except where an * inheriting program overrides it (c.f. [bug 1252]). * * Furthermore, that's not how it works currently; if this * error is removed then local:: will do nothing on variables * except forcing a lookup in the closest surrounding class * scope. */ yyerror ("Cannot make local references to variables."); $$ = 0; } else { if (!(ref->id_flags & ID_HIDDEN)) { /* We need to generate a new reference. */ int d; struct reference funp = *ref; funp.id_flags = (funp.id_flags & ~ID_INHERITED) | ID_INLINE|ID_HIDDEN; i = -1; for(d = 0; d < (int)Pike_compiler->new_program->num_identifier_references; d++) { struct reference *refp; refp = Pike_compiler->new_program->identifier_references + d; if(!MEMCMP((char *)refp,(char *)&funp,sizeof funp)) { i = d; break; } } if (i < 0) { add_to_identifier_references(funp); i = Pike_compiler->new_program->num_identifier_references - 1; } } $$ = mkidentifiernode(i); } } else { if (!Pike_compiler->num_parse_error) { if (Pike_compiler->compiler_pass == 2) { my_yyerror("'%s' not defined in local scope.", Pike_compiler->last_identifier->str); $$ = 0; } else { $$ = mknode(F_UNDEFINED, 0, 0); } } else { $$ = mkintnode(0); } } free_node($3); } | TOK_LOCAL_ID TOK_COLON_COLON bad_identifier { $$=0; } ; idents: low_idents | idents '.' TOK_IDENTIFIER { $$=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); } | '.' 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 { $$ = resolve_identifier ($3->u.sval.u.string); if(Pike_compiler->last_identifier) free_string(Pike_compiler->last_identifier); copy_shared_string(Pike_compiler->last_identifier, $3->u.sval.u.string); free_node ($3); } | idents '.' bad_identifier {} | idents '.' error {} ; inherit_specifier: TOK_IDENTIFIER TOK_COLON_COLON { int e = -1; inherit_state = Pike_compiler; for (inherit_depth = 0;; inherit_depth++, inherit_state = inherit_state->previous) { int inh = find_inherit(inherit_state->new_program, $1->u.sval.u.string); if (inh) { e = inh; break; } if (inherit_depth == compilation_depth) break; if (!TEST_COMPAT (7, 2) && ID_FROM_INT (inherit_state->previous->new_program, inherit_state->previous->parent_identifier)->name == $1->u.sval.u.string) { e = 0; break; } } if (e == -1) { if (TEST_COMPAT (7, 2)) my_yyerror("No such inherit %s.", $1->u.sval.u.string->str); else { if ($1->u.sval.u.string == this_program_string) { inherit_state = Pike_compiler; inherit_depth = 0; e = 0; } else my_yyerror("No inherit or surrounding class %s.", $1->u.sval.u.string->str); } } free_node($1); $$ = e; } | TOK_GLOBAL TOK_COLON_COLON { inherit_state = Pike_compiler; for (inherit_depth = 0; inherit_depth < compilation_depth; inherit_depth++, inherit_state = inherit_state->previous) {} $$ = 0; } | inherit_specifier TOK_IDENTIFIER TOK_COLON_COLON { if ($1 >= 0) { int e = 0; #if 0 /* FIXME: The inherit modifiers aren't kept. */ if (!(inherit_state->new_program->inherits[$1].flags & ID_PRIVATE)) { #endif /* 0 */ e = find_inherit(inherit_state->new_program->inherits[$1].prog, $2->u.sval.u.string); #if 0 } #endif /* 0 */ if (!e) { if (inherit_state->new_program->inherits[$1].name) { my_yyerror("No such inherit %s::%s.", inherit_state->new_program->inherits[$1].name->str, $2->u.sval.u.string->str); } else { my_yyerror("No such inherit %s.", $2->u.sval.u.string->str); } $$ = -1; } else { /* We know stuff about the inherit structure... */ $$ = e + $1; } } free_node($2); } | inherit_specifier bad_identifier TOK_COLON_COLON { $$ = -1; } ; 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)) && !($$ = program_magic_identifier (Pike_compiler, 0, 0, Pike_compiler->last_identifier, 0))) { if(!Pike_compiler->num_parse_error) { if(Pike_compiler->compiler_pass==2) { my_yyerror("Undefined identifier %s.", Pike_compiler->last_identifier->str); $$=0; }else{ $$=mknode(F_UNDEFINED,0,0); } }else{ $$=mkintnode(0); } } free_node($1); } | TOK_PREDEF TOK_COLON_COLON TOK_IDENTIFIER { node *tmp2; extern dynamic_buffer used_modules; 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((struct svalue *) used_modules.s.str ); $$=index_node(tmp2, "predef", $3->u.sval.u.string); if(!$$->name) add_ref( $$->name=$3->u.sval.u.string ); free_node(tmp2); free_node($3); } | TOK_PREDEF TOK_COLON_COLON bad_identifier { $$=0; } | inherit_specifier TOK_IDENTIFIER { if ($1 >= 0) { 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); if ($1 > 0) id = low_reference_inherited_identifier(inherit_state, $1, Pike_compiler->last_identifier, SEE_STATIC); else id = really_low_find_shared_string_identifier(Pike_compiler->last_identifier, inherit_state->new_program, SEE_STATIC|SEE_PRIVATE); if (id != -1) { if (inherit_depth > 0) { $$ = mkexternalnode(inherit_state->new_program, id); } else { $$ = mkidentifiernode(id); } } else if (($$ = program_magic_identifier (inherit_state, inherit_depth, $1, Pike_compiler->last_identifier, 1))) { /* All done. */ } else { if (Pike_compiler->compiler_pass == 2) { if (inherit_state->new_program->inherits[$1].name) { my_yyerror("Undefined identifier %s::%s.", inherit_state->new_program->inherits[$1].name->str, Pike_compiler->last_identifier->str); } else { my_yyerror("Undefined identifier %s.", Pike_compiler->last_identifier->str); } $$=0; } else $$=mknode(F_UNDEFINED,0,0); } } else { $$=0; } free_node($2); } | inherit_specifier bad_identifier { $$=0; } | inherit_specifier error { $$=0; } | TOK_COLON_COLON TOK_IDENTIFIER { int e,i; if(Pike_compiler->last_identifier) free_string(Pike_compiler->last_identifier); copy_shared_string(Pike_compiler->last_identifier, $2->u.sval.u.string); $$=0; for(e=1;e<(int)Pike_compiler->new_program->num_inherits;e++) { if(Pike_compiler->new_program->inherits[e].inherit_level!=1) continue; i=low_reference_inherited_identifier(0,e,$2->u.sval.u.string,SEE_STATIC); if(i==-1) continue; if($$) { $$=mknode(F_ARG_LIST,$$,mkidentifiernode(i)); }else{ $$=mkidentifiernode(i); } } if(!$$) { if (!($$ = program_magic_identifier (Pike_compiler, 0, -1, $2->u.sval.u.string, 1))) { if (Pike_compiler->compiler_pass == 2) { if (TEST_COMPAT(7,2)) { yywarning("Undefined identifier ::%s.", $2->u.sval.u.string->str); } else { my_yyerror("Undefined identifier ::%s.", $2->u.sval.u.string->str); } } $$=mkintnode(0); } }else{ if($$->token==F_ARG_LIST) $$=mkefuncallnode("aggregate",$$); } free_node($2); } | TOK_COLON_COLON bad_identifier { $$=0; } ; comma_expr_or_zero: /* empty */ { $$=mkintnode(0); } | comma_expr | TOK_LEX_EOF { yyerror("Unexpected end of file."); $$=0; } ; comma_expr_or_maxint: /* empty */ { $$=mkintnode(0x7fffffff); } | comma_expr | TOK_LEX_EOF { yyerror("Unexpected end of file."); $$=mkintnode(0x7fffffff); } ; gauge: TOK_GAUGE catch_arg { $$=mkefuncallnode("abs", mkopernode("`/", mkopernode("`-", mkefuncallnode("gethrvtime",0), mknode(F_COMMA_EXPR, mknode(F_POP_VALUE, $2, NULL), mkefuncallnode("gethrvtime",0))), mkfloatnode((FLOAT_TYPE)1000000.0))); }; typeof: TOK_TYPEOF '(' expr0 ')' { struct pike_type *t; node *tmp; /* FIXME: Why build the node at all? */ /* Because the optimizer cannot optimize the root node of the * tree properly -Hubbe */ tmp=mknode(F_COMMA_EXPR, $3, 0); optimize_node(tmp); t=(tmp && CAR(tmp) && CAR(tmp)->type ? CAR(tmp)->type : mixed_type_string); if(TEST_COMPAT(7,0)) { struct pike_string *s=describe_type(t); $$ = mkstrnode(s); free_string(s); }else{ $$ = mktypenode(t); } free_node(tmp); } | TOK_TYPEOF '(' error ')' { $$=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 ')' { $$=mknode(F_SSCANF,mknode(F_ARG_LIST,$3,$5),$6); } | TOK_SSCANF '(' expr0 ',' expr0 error ')' { $$=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 ';' { $$=0; yyerror("Missing ')'."); } ; lvalue: expr4 | '[' low_lvalue_list ']' { $$=mknode(F_ARRAY_LVALUE, $2,0); } | type6 TOK_IDENTIFIER { int id = add_local_name($2->u.sval.u.string,compiler_pop_type(),0); if (id >= 0) $$=mklocalnode(id,0); else $$ = 0; free_node($2); } | 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: TOK_STRING | string 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); } ; /* * Some error-handling */ /* FIXME: Should probably set Pike_compiler->last_identifier. */ bad_identifier: bad_expr_ident | TOK_ARRAY_ID { yyerror("array is a reserved word."); } | TOK_CLASS { yyerror("class is a reserved word."); } | TOK_ENUM { yyerror("enum is a reserved word."); } | TOK_FLOAT_ID { yyerror("float is a reserved word.");} | TOK_FUNCTION_ID { yyerror("function is a reserved word.");} | TOK_INT_ID { yyerror("int is a reserved word."); } | TOK_MAPPING_ID { yyerror("mapping is a reserved word."); } | TOK_MIXED_ID { yyerror("mixed is a reserved word."); } | TOK_MULTISET_ID { yyerror("multiset is a reserved word."); } | TOK_OBJECT_ID { yyerror("object is a reserved word."); } | TOK_PROGRAM_ID { yyerror("program is a reserved word."); } | TOK_STRING_ID { yyerror("string is a reserved word."); } | TOK_TYPEDEF { yyerror("typedef is a reserved word."); } | TOK_VOID_ID { yyerror("void is a reserved word."); } ; bad_expr_ident: TOK_INLINE { yyerror("inline is a reserved word."); } | TOK_LOCAL_ID { yyerror("local is a reserved word."); } | TOK_NO_MASK { yyerror("nomask is a reserved word."); } | TOK_PREDEF { yyerror("predef is a reserved word."); } | TOK_PRIVATE { yyerror("private is a reserved word."); } | TOK_PROTECTED { yyerror("protected is a reserved word."); } | TOK_PUBLIC { yyerror("public is a reserved word."); } | TOK_OPTIONAL { yyerror("optional is a reserved word."); } | TOK_VARIANT { yyerror("variant is a reserved word."); } | TOK_STATIC { yyerror("static is a reserved word."); } | TOK_EXTERN { yyerror("extern is a reserved word."); } | TOK_FINAL_ID { yyerror("final is a reserved word.");} | TOK_DO { yyerror("do is a reserved word."); } | TOK_ELSE { yyerror("else without if."); } | TOK_RETURN { yyerror("return is a reserved word."); } | TOK_IMPORT { yyerror("import is a reserved word."); } | TOK_INHERIT { yyerror("inherit is a reserved word."); } | TOK_CATCH { yyerror("catch is a reserved word."); } | TOK_GAUGE { yyerror("gauge is a reserved word."); } | TOK_LAMBDA { yyerror("lambda is a reserved word."); } | TOK_SSCANF { yyerror("sscanf is a reserved word."); } | TOK_SWITCH { yyerror("switch is a reserved word."); } | TOK_TYPEOF { yyerror("typeof is a reserved word."); } | TOK_BREAK { yyerror("break is a reserved word."); } | TOK_CASE { yyerror("case is a reserved word."); } | TOK_CONTINUE { yyerror("continue is a reserved word."); } | TOK_DEFAULT { yyerror("default is a reserved word."); } | TOK_FOR { yyerror("for is a reserved word."); } | TOK_FOREACH { yyerror("foreach is a reserved word."); } | TOK_IF { yyerror("if is a reserved word."); } ; /* * 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: /*empty*/; %% void yyerror(char *str) { extern int num_parse_error; extern int cumulative_parse_error; #ifdef PIKE_DEBUG if(Pike_interpreter.recoveries && Pike_sp-Pike_interpreter.evaluator_stack < Pike_interpreter.recoveries->stack_pointer) Pike_fatal("Stack error (underflow)\n"); #endif if (Pike_compiler->num_parse_error > 10) return; Pike_compiler->num_parse_error++; cumulative_parse_error++; if ((error_handler && error_handler->prog) || get_master()) { if (lex.current_file) { ref_push_string(lex.current_file); } else { /* yyerror() can be called from define_function(), which * can be called by the C module initialization code. */ push_constant_text(""); } push_int(lex.current_line); push_text(str); low_safe_apply_handler("compile_error", error_handler, compat_handler, 3); pop_stack(); }else{ if (lex.current_file) { (void)fprintf(stderr, "%s:%ld: %s\n", lex.current_file->str, (long)lex.current_line, str); } else { (void)fprintf(stderr, "NULL:%ld: %s\n", (long)lex.current_line, str); } fflush(stderr); } } 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) return e; return -1; } int low_add_local_name(struct compiler_frame *frame, struct pike_string *str, struct pike_type *type, node *def) { if (str->len && !TEST_COMPAT(7,0)) { int tmp=low_islocal(frame,str); if(tmp>=0 && tmp >= frame->last_block_level) { if(str->size_shift) my_yyerror("Duplicate local variable, " "previous declaration on line %d\n", frame->variable[tmp].line); else my_yyerror("Duplicate local variable '%s', " "previous declaration on line %d\n", STR0(str), frame->variable[tmp].line); } if(type == void_type_string) { if(str->size_shift) my_yyerror("Local variables cannot be of type of 'void'.\n"); else my_yyerror("Local variable '%s' is void.\n",STR0(str)); } } debug_malloc_touch(def); debug_malloc_touch(type); debug_malloc_touch(str); reference_shared_string(str); if (frame->current_number_of_locals == MAX_LOCAL) { yyerror("Too many local variables."); return -1; }else { #ifdef PIKE_DEBUG check_type_string(type); #endif /* PIKE_DEBUG */ if (pike_types_le(type, void_type_string)) { if (Pike_compiler->compiler_pass != 1) { yywarning("Declaring local variable with type void " "(converted to type zero)."); } free_type(type); copy_pike_type(type, zero_type_string); } frame->variable[frame->current_number_of_locals].type = type; frame->variable[frame->current_number_of_locals].name = str; frame->variable[frame->current_number_of_locals].def = def; frame->variable[frame->current_number_of_locals].line=lex.current_line; frame->variable[frame->current_number_of_locals].file=lex.current_file; add_ref(lex.current_file); 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 frame->current_number_of_locals-1; } } /* 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); } 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; 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; 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 void safe_inc_enum(void) { JMP_BUF recovery; STACK_LEVEL_START(1); if (SETJMP_SP(recovery, 1)) { struct svalue s; assign_svalue_no_free(&s, &throw_value); yyerror("Bad implicit enum value (failed to add 1)."); push_svalue(&s); low_safe_apply_handler("compile_exception", error_handler, compat_handler, 1); if (SAFE_IS_ZERO(Pike_sp-1)) yy_describe_exception(&s); pop_stack(); push_int(0); free_svalue(&s); } else { push_int(1); f_add(2); } UNSETJMP(recovery); STACK_LEVEL_DONE(1); } static int call_handle_import(struct pike_string *s) { int args; ref_push_string(s); ref_push_string(lex.current_file); if (error_handler && error_handler->prog) { ref_push_object(error_handler); args = 3; } else args = 2; if (safe_apply_handler("handle_import", error_handler, compat_handler, args, BIT_MAPPING|BIT_OBJECT|BIT_PROGRAM|BIT_ZERO)) if (Pike_sp[-1].type != T_INT) return 1; else { pop_stack(); if (!s->size_shift) my_yyerror("Couldn't find module to import: %s",s->str); else yyerror("Couldn't find module to import"); } else { struct svalue thrown = throw_value; throw_value.type = T_INT; my_yyerror("Error finding module to import"); push_svalue(&thrown); low_safe_apply_handler("compile_exception", error_handler, compat_handler, 1); if (SAFE_IS_ZERO(Pike_sp-1)) yy_describe_exception(&thrown); pop_stack(); free_svalue(&thrown); } return 0; } void cleanup_compiler(void) { }

pike.git/ src/ language.yacc > de4a0c951d7e05ca16fb68406411766b7e721d8a [Annotate]