pike.git/ src/ program.c

2016-05-02

2016-05-02 16:37:15 by Henrik Grubbström (Grubba) <grubba@grubba.org>

• 54bc86f0abadcba2ce2688fa1384a3a23ea143b2 (67 lines) (+67/-0) ^{[ Show | Annotate ]}
  Branch: 8.1

Compiler: Added helper function find_inherited_identifier().

This function is intended to be used to reduce some of
the duplicated code in language.yacc.

2016:    return ret;   }    + /** +  * Find the identifier named ident in inherit #inh in the lexical scope +  * given by inherit_state and inherit_depth. +  * +  * @param inherit_state +  * The program state for the program where the inherit is found. +  * +  * @param inherit_depth +  * The number of lexical levels from the currently compiling program +  * (ie Pike_compiler) to the one in inherit_state. +  * +  * @param inh +  * >0 Specified inherit. +  * =0 this_program:: or this::. +  * -1 global:: +  * -2 :: +  */ + struct node_s *find_inherited_identifier(struct program_state *inherit_state, +  int inherit_depth, int inh, +  struct pike_string *ident) + { +  int id; +  +  if (inh < -1) { +  // Unspecified inherit. +  struct node_s *res = NULL; +  struct program *p = inherit_state->new_program; +  for (inh = 1; inh < p->num_inherits; inh++) { +  struct node_s *n; +  if (p->inherits[inh].inherit_level != 1) continue; +  n = find_inherited_identifier(inherit_state, inherit_depth, inh, ident); +  if (!n) continue; +  if (res) { +  res = mknode(F_ARG_LIST, res, n); +  } else { +  res = n; +  } +  } +  if (res) { +  if (res->token == F_ARG_LIST) res = mkefuncallnode("aggregate", res); +  return res; +  } +  inh = -1; +  } else { +  if (inh > 0) { +  /* Specified inherit. */ +  id = low_reference_inherited_identifier(inherit_state, inh, ident, +  SEE_PROTECTED); +  } else { +  /* this_program:: or global:: */ +  id = really_low_find_shared_string_identifier(ident, +  inherit_state->new_program, +  SEE_PROTECTED|SEE_PRIVATE); +  } +  +  if (id != -1) { +  if (inherit_depth > 0) { +  return mkexternalnode(inherit_state->new_program, id); +  } +  return mkidentifiernode(id); +  } +  } +  +  return program_magic_identifier(inherit_state, inherit_depth, inh, ident, 1); + } +    /*! @decl constant this    *!    *! Builtin read only variable that evaluates to the current object.