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/* -----------------------------------------------------------------------------
* This file is part of SWIG, which is licensed as a whole under version 3
* (or any later version) of the GNU General Public License. Some additional
* terms also apply to certain portions of SWIG. The full details of the SWIG
* license and copyrights can be found in the LICENSE and COPYRIGHT files
* included with the SWIG source code as distributed by the SWIG developers
* and at https://www.swig.org/legal.html.
*
* extend.c
*
* Extensions support (%extend)
* ----------------------------------------------------------------------------- */
#include "swig.h"
#include "cparse.h"
static Hash *extendhash = 0; /* Hash table of added methods */
/* -----------------------------------------------------------------------------
* Swig_extend_hash()
*
* Access the extend hash
* ----------------------------------------------------------------------------- */
Hash *Swig_extend_hash(void) {
if (!extendhash)
extendhash = NewHash();
return extendhash;
}
/* -----------------------------------------------------------------------------
* Swig_extend_merge()
*
* Extension merge. This function is used to handle the %extend directive
* when it appears before a class definition. To handle this, the %extend
* actually needs to take precedence. Therefore, we will selectively nuke symbols
* from the current symbol table, replacing them with the added methods.
* ----------------------------------------------------------------------------- */
void Swig_extend_merge(Node *cls, Node *am) {
Node *n;
Node *csym;
n = firstChild(am);
while (n) {
String *symname;
if (Strcmp(nodeType(n),"constructor") == 0) {
symname = Getattr(n,"sym:name");
if (symname) {
if (Strcmp(symname,Getattr(n,"name")) == 0) {
/* If the name and the sym:name of a constructor are the same,
then it hasn't been renamed. However---the name of the class
itself might have been renamed so we need to do a consistency
check here */
if (Getattr(cls,"sym:name")) {
Setattr(n,"sym:name", Getattr(cls,"sym:name"));
}
}
}
}
symname = Getattr(n,"sym:name");
DohIncref(symname);
if ((symname) && (!Getattr(n,"error"))) {
/* Remove node from its symbol table */
Swig_symbol_remove(n);
csym = Swig_symbol_add(symname,n);
if (csym != n) {
/* Conflict with previous definition. Nuke previous definition */
String *e = NewStringEmpty();
String *en = NewStringEmpty();
String *ec = NewStringEmpty();
Printf(ec,"Identifier '%s' redefined by %%extend (ignored),",symname);
Printf(en,"%%extend definition of '%s'.",symname);
SWIG_WARN_NODE_BEGIN(n);
Swig_warning(WARN_PARSE_REDEFINED,Getfile(csym),Getline(csym),"%s\n",ec);
Swig_warning(WARN_PARSE_REDEFINED,Getfile(n),Getline(n),"%s\n",en);
SWIG_WARN_NODE_END(n);
Printf(e,"%s:%d:%s\n%s:%d:%s\n",Getfile(csym),Getline(csym),ec,
Getfile(n),Getline(n),en);
Setattr(csym,"error",e);
Delete(e);
Delete(en);
Delete(ec);
Swig_symbol_remove(csym); /* Remove class definition */
Swig_symbol_add(symname,n); /* Insert extend definition */
}
}
n = nextSibling(n);
}
}
/* -----------------------------------------------------------------------------
* Swig_extend_append_previous()
* ----------------------------------------------------------------------------- */
void Swig_extend_append_previous(Node *cls, Node *am) {
Node *n, *ne;
Node *pe = 0;
Node *ae = 0;
if (!am) return;
n = firstChild(am);
while (n) {
ne = nextSibling(n);
set_nextSibling(n,0);
/* typemaps and fragments need to be prepended */
if (((Cmp(nodeType(n),"typemap") == 0) || (Cmp(nodeType(n),"fragment") == 0))) {
if (!pe) pe = Swig_cparse_new_node("extend");
appendChild(pe, n);
} else {
if (!ae) ae = Swig_cparse_new_node("extend");
appendChild(ae, n);
}
n = ne;
}
if (pe) prependChild(cls,pe);
if (ae) appendChild(cls,ae);
}
/* -----------------------------------------------------------------------------
* Swig_extend_unused_check()
*
* Check for unused %extend. Special case, don't report unused
* extensions for templates
* ----------------------------------------------------------------------------- */
void Swig_extend_unused_check(void) {
Iterator ki;
if (!extendhash) return;
for (ki = First(extendhash); ki.key; ki = Next(ki)) {
if (!Strchr(ki.key,'<')) {
SWIG_WARN_NODE_BEGIN(ki.item);
Swig_warning(WARN_PARSE_EXTEND_UNDEF,Getfile(ki.item), Getline(ki.item), "%%extend defined for an undeclared class %s.\n", SwigType_namestr(ki.key));
SWIG_WARN_NODE_END(ki.item);
}
}
}
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