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Comments on the symbol table added

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git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@5846 626c5289-ae23-0410-ae9c-e8d60b6d4f22
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William S Fulton 2004-04-09 19:23:01 +00:00
commit 1e5687070e
1 changed files with 77 additions and 1 deletions
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78
SWIG/Source/Swig/symbol.c
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@ -114,6 +114,57 @@ char cvsroot_symbol_c[] = "$Header$";
*
* These names are modeled after XML namespaces. In particular, every attribute
* pertaining to symbol table management is prefaced by the "sym:" prefix.
*
* An example dump of the parse tree showing symbol table entries for the
* following code should clarify this:
*
* namespace OuterNamespace {
* namespace InnerNamespace {
* class Class {
* };
* struct Struct {
* int Var;
* };
* }
* }
*
* +++ namespace ----------------------------------------
* | sym:name - "OuterNamespace"
* | symtab - 0xa064bf0
* | sym:symtab - 0xa041690
* | sym:overname - "__SWIG_0"
*
* +++ namespace ----------------------------------------
* | sym:name - "InnerNamespace"
* | symtab - 0xa064cc0
* | sym:symtab - 0xa064bf0
* | sym:overname - "__SWIG_0"
*
* +++ class ----------------------------------------
* | sym:name - "Class"
* | symtab - 0xa064d80
* | sym:symtab - 0xa064cc0
* | sym:overname - "__SWIG_0"
* |
* +++ class ----------------------------------------
* | sym:name - "Struct"
* | symtab - 0xa064f00
* | sym:symtab - 0xa064cc0
* | sym:overname - "__SWIG_0"
*
* +++ cdecl ----------------------------------------
* | sym:name - "Var"
* | sym:symtab - 0xa064f00
* | sym:overname - "__SWIG_0"
* |
*
*
* Each class and namespace has its own scope and thus a new symbol table (sym)
* is created. The sym attribute is only set for the first entry in the symbol
* table. The sym:symtab entry points to the symbol table in which the symbol
* exists, so for example, Struct is in the scope OuterNamespace::InnerNamespace
* so sym:symtab points to this symbol table (0xa064cc0).
*
* ----------------------------------------------------------------------------- */
static Hash *current = 0; /* The current symbol table hash */
@ -122,6 +173,20 @@ static Hash *current_symtab = 0; /* Current symbol table node */
static Hash *symtabs = 0; /* Hash of all symbol tables by fully-qualified name */
static Hash *global_scope = 0; /* Global scope */
#if 0
void
Swig_symbol_dump_symtable() {
Printf(stdout, "DUMPING SYMTABLE start =======================================\n");
{
Hash* cst = Getattr(current_symtab, "csymtab");
Swig_print_tree(cst);
Printf(stdout, "DUMPING SYMTABLE middle =======================================\n");
Swig_print_tree(Getattr(cst, "NumSpace"));
}
Printf(stdout, "DUMPING SYMTABLE end =======================================\n");
}
#endif
/* -----------------------------------------------------------------------------
* Swig_symbol_new()
*
@ -650,7 +715,7 @@ Swig_symbol_add(String_or_char *symname, Node *n) {
}
/* -----------------------------------------------------------------------------
* symbol_lookup_qualified()
* symbol_lookup()
*
* Internal function to handle fully qualified symbol table lookups. This
* works from the symbol table supplied in symtab and unwinds its way out
@ -708,6 +773,10 @@ symbol_lookup(String_or_char *name, Symtab *symtab, int (*check)(Node *n)) {
return 0;
}
/* -----------------------------------------------------------------------------
* symbol_lookup_qualified()
* ----------------------------------------------------------------------------- */
static Node *
symbol_lookup_qualified(String_or_char *name, Symtab *symtab, String *prefix, int local, int (*checkfunc)(Node *n)) {
/* This is a little funky, we search by fully qualified names */
@ -888,6 +957,10 @@ Swig_symbol_clookup_check(String_or_char *name, Symtab *n, int (*checkfunc)(Node
return s;
}
/* -----------------------------------------------------------------------------
* Swig_symbol_clookup_local()
* ----------------------------------------------------------------------------- */
Node *
Swig_symbol_clookup_local(String_or_char *name, Symtab *n) {
Hash *h, *hsym;
@ -927,6 +1000,9 @@ Swig_symbol_clookup_local(String_or_char *name, Symtab *n) {
return s;
}
/* -----------------------------------------------------------------------------
* Swig_symbol_clookup_local_check()
* ----------------------------------------------------------------------------- */
Node *
Swig_symbol_clookup_local_check(String_or_char *name, Symtab *n, int (*checkfunc)(Node *)) {