/* ----------------------------------------------------------------------------- 
 * See the LICENSE file for information on copyright, usage and redistribution
 * of SWIG, and the README file for authors - http://www.swig.org/release.html.
 *
 * typepass.cxx
 *
 * This module builds all of the internal type information by collecting
 * typedef declarations as well as registering classes, structures, and unions.
 * This information is needed to correctly handle shadow classes and other
 * advanced features.   This phase of compilation is also used to perform
 * type-expansion.  All types are fully qualified with namespace prefixes
 * and other information needed for compilation.
 * ----------------------------------------------------------------------------- */

char cvsroot_typepass_cxx[] = "$Header: /cvsroot/swig/SWIG/Source/Modules/typepass.cxx,v 1.36 2006/11/01 23:54:52 wsfulton Exp $";

#include "swigmod.h"
#include "cparse.h"

struct normal_node {
  Symtab *symtab;
  Hash *typescope;
  List *normallist;
  normal_node *next;
};

static normal_node *patch_list = 0;

/* Singleton class - all non-static methods in this class are private */
class TypePass:private Dispatcher {
  Node *inclass;
  Node *module;
  int importmode;
  String *nsname;
  Hash *classhash;
  List *normalize;

  TypePass() {
  }

  /* Normalize a type. Replaces type with fully qualified version */
  void normalize_type(SwigType *ty) {
    SwigType *qty;
    if (CPlusPlus) {
      Replaceall(ty, "struct ", "");
      Replaceall(ty, "union ", "");
      Replaceall(ty, "class ", "");
    }

    qty = SwigType_typedef_qualified(ty);
    /*    Printf(stdout,"%s --> %s\n", ty, qty); */
    Clear(ty);
    Append(ty, qty);
    Delete(qty);
  }

  /* Normalize a parameter list */

  void normalize_parms(ParmList *p) {
    while (p) {
      SwigType *ty = Getattr(p, "type");
      normalize_type(ty);
      /* This is a check for a function type */
      {
	SwigType *qty = SwigType_typedef_resolve_all(ty);
	if (SwigType_isfunction(qty)) {
	  SwigType_add_pointer(ty);
	}
	Delete(qty);
      }

      String *value = Getattr(p, "value");
      if (value) {
	Node *n = Swig_symbol_clookup(value, 0);
	if (n) {
	  String *q = Swig_symbol_qualified(n);
	  if (q && Len(q)) {
	    String *vb = Swig_scopename_last(value);
	    Clear(value);
	    Printf(value, "%s::%s", SwigType_namestr(q), vb);
	    Delete(q);
	  }
	}
      }
      if (value && SwigType_istemplate(value)) {
	String *nv = SwigType_namestr(value);
	Setattr(p, "value", nv);
      }
      p = nextSibling(p);
    }
  }

  void normalize_later(ParmList *p) {
    while (p) {
      SwigType *ty = Getattr(p, "type");
      Append(normalize, ty);
      p = nextSibling(p);
    }
  }

  /* Walk through entries in normalize list and patch them up */
  void normalize_list() {
    Hash *currentsym = Swig_symbol_current();

    normal_node *nn = patch_list;
    normal_node *np;
    while (nn) {
      Swig_symbol_setscope(nn->symtab);
      SwigType_set_scope(nn->typescope);
      Iterator t;
      for (t = First(nn->normallist); t.item; t = Next(t)) {
	normalize_type(t.item);
      }
      Delete(nn->normallist);
      np = nn->next;
      delete(nn);
      nn = np;
    }
    Swig_symbol_setscope(currentsym);
  }

  /* generate C++ inheritance type-relationships */
  void cplus_inherit_types_impl(Node *first, Node *cls, String *clsname, const char *bases, const char *baselist, int ispublic, String *cast = 0) {

    if (first == cls)
      return;			/* The Marcelo check */
    if (!cls)
      cls = first;
    List *alist = 0;
    List *ilist = Getattr(cls, bases);
    if (!ilist) {
      List *nlist = Getattr(cls, baselist);
      if (nlist) {
	int len = Len(nlist);
	int i;
	for (i = 0; i < len; i++) {
	  Node *bcls = 0;
	  int clsforward = 0;
	  String *bname = Getitem(nlist, i);
	  String *sname = bname;
	  String *tname = 0;

	  /* Try to locate the base class.   We look in the symbol table and we chase 
	     typedef declarations to get to the base class if necessary */
	  Symtab *st = Getattr(cls, "sym:symtab");

	  if (SwigType_istemplate(bname)) {
	    tname = SwigType_typedef_resolve_all(bname);
	    sname = tname;
	  }
	  while (1) {
	    String *qsname = SwigType_typedef_qualified(sname);
	    bcls = Swig_symbol_clookup(qsname, st);
	    Delete(qsname);
	    if (bcls) {
	      if (Strcmp(nodeType(bcls), "class") != 0) {
		/* Not a class.   The symbol could be a typedef. */
		if (checkAttribute(bcls, "storage", "typedef")) {
		  SwigType *decl = Getattr(bcls, "decl");
		  if (!decl || !(Len(decl))) {
		    sname = Getattr(bcls, "type");
		    st = Getattr(bcls, "sym:symtab");
		    if (SwigType_istemplate(sname)) {
		      if (tname)
			Delete(tname);
		      tname = SwigType_typedef_resolve_all(sname);
		      sname = tname;
		    }
		    continue;
		  }
		}
		if (Strcmp(nodeType(bcls), "classforward") != 0) {
		  Swig_error(Getfile(cls), Getline(cls), "'%s' does not have a valid base class.\n", Getattr(cls, "name"));
		  Swig_error(Getfile(bcls), Getline(bcls), "'%s' is not a valid base class.\n", bname);
		} else {
		  Swig_warning(WARN_TYPE_INCOMPLETE, Getfile(cls), Getline(cls), "Base class '%s' is incomplete.\n", bname);
		  Swig_warning(WARN_TYPE_INCOMPLETE, Getfile(bcls), Getline(bcls), "Only forward declaration '%s' was found.\n", bname);
		  clsforward = 1;
		}
		bcls = 0;
	      } else {
		if (Getattr(bcls, "typepass:visit")) {
		  if (!ilist)
		    ilist = alist = NewList();
		  Append(ilist, bcls);
		} else {
		  Swig_warning(WARN_TYPE_UNDEFINED_CLASS, Getfile(cls), Getline(cls), "Base class '%s' undefined.\n", bname);
		  Swig_warning(WARN_TYPE_UNDEFINED_CLASS, Getfile(bcls), Getline(bcls), "'%s' must be defined before it is used as a base class.\n", bname);
		}
	      }
	    }
	    break;
	  }

	  if (tname)
	    Delete(tname);
	  if (!bcls) {
	    if (!clsforward) {
	      if (ispublic && !Getmeta(bname, "already_warned")) {
		Swig_warning(WARN_TYPE_UNDEFINED_CLASS, Getfile(cls), Getline(cls), "Nothing known about base class '%s'. Ignored.\n", SwigType_namestr(bname));
		if (Strchr(bname, '<')) {
		  Swig_warning(WARN_TYPE_UNDEFINED_CLASS, Getfile(cls), Getline(cls), "Maybe you forgot to instantiate '%s' using %%template.\n",
			       SwigType_namestr(bname));
		}
		Setmeta(bname, "already_warned", "1");
	      }
	    }
	    SwigType_inherit(clsname, bname, cast);
	  }
	}
      }
      if (ilist) {
	Setattr(cls, bases, ilist);
      }
    }
    if (alist)
      Delete(alist);

    if (!ilist)
      return;
    int len = Len(ilist);
    int i;
    for (i = 0; i < len; i++) {
      Node *n = Getitem(ilist, i);
      String *bname = Getattr(n, "name");
      Node *bclass = n;		/* Getattr(n,"class"); */
      Hash *scopes = Getattr(bclass, "typescope");
      SwigType_inherit(clsname, bname, cast);
      if (!importmode) {
	String *btype = Copy(bname);
	SwigType_add_pointer(btype);
	SwigType_remember(btype);
	Delete(btype);
      }
      if (scopes) {
	SwigType_inherit_scope(scopes);
      }
      /* Set up inheritance in the symbol table */
      Symtab *st = Getattr(cls, "symtab");
      Symtab *bst = Getattr(bclass, "symtab");
      if (st == bst) {
	Swig_warning(WARN_PARSE_REC_INHERITANCE, Getfile(cls), Getline(cls), "Recursive scope inheritance of '%s'.\n", HashGetAttr(cls, k_name));
	continue;
      }
      Symtab *s = Swig_symbol_current();
      Swig_symbol_setscope(st);
      Swig_symbol_inherit(bst);
      Swig_symbol_setscope(s);

      /* Recursively hit base classes */
      String *namestr = SwigType_namestr(Getattr(bclass, "name"));
      String *newcast = NewStringf("(%s *)%s", namestr, cast);
      Delete(namestr);
      cplus_inherit_types_impl(first, bclass, clsname, bases, baselist, ispublic, newcast);
      Delete(newcast);
    }
  }

  void append_list(List *lb, List *la) {
    if (la && lb) {
      for (Iterator bi = First(la); bi.item; bi = Next(bi)) {
	Append(lb, bi.item);
      }
    }
  }

  void cplus_inherit_types(Node *first, Node *cls, String *clsname, String *cast = 0) {
    cplus_inherit_types_impl(first, cls, clsname, "bases", "baselist", 1, cast);
    cplus_inherit_types_impl(first, cls, clsname, "protectedbases", "protectedbaselist", 0, cast);
    cplus_inherit_types_impl(first, cls, clsname, "privatebases", "privatebaselist", 0, cast);

    if (!cls)
      cls = first;

    List *allbases = NewList();
    append_list(allbases, Getattr(cls, "bases"));
    append_list(allbases, Getattr(cls, "protectedbases"));
    append_list(allbases, Getattr(cls, "privatebases"));
    if (Len(allbases)) {
      Setattr(cls, "allbases", allbases);
    }
    Delete(allbases);
  }

  /* ------------------------------------------------------------
   * top()
   * ------------------------------------------------------------ */

  virtual int top(Node *n) {
    importmode = 0;
    module = Getattr(n, "module");
    inclass = 0;
    normalize = 0;
    nsname = 0;
    classhash = Getattr(n, "classes");
    emit_children(n);
    normalize_list();
    SwigType_set_scope(0);
    return SWIG_OK;
  }


  /* ------------------------------------------------------------
   * moduleDirective()
   * ------------------------------------------------------------ */

  virtual int moduleDirective(Node *n) {
    if (!module) {
      module = n;
    }
    return SWIG_OK;
  }

  /* ------------------------------------------------------------
   * importDirective()
   * ------------------------------------------------------------ */

  virtual int importDirective(Node *n) {
    String *oldmodule = module;
    int oldimport = importmode;
    importmode = 1;
    module = 0;
    emit_children(n);
    importmode = oldimport;
    module = oldmodule;
    return SWIG_OK;
  }

  /* ------------------------------------------------------------
   * includeDirective()
   * externDirective()
   * extendDirective()
   * ------------------------------------------------------------ */

  virtual int includeDirective(Node *n) {
    return emit_children(n);
  }
  virtual int externDeclaration(Node *n) {
    return emit_children(n);
  }
  virtual int extendDirective(Node *n) {
    return emit_children(n);
  }

  /* ------------------------------------------------------------
   * classDeclaration()
   * ------------------------------------------------------------ */

  virtual int classDeclaration(Node *n) {
    String *name = Getattr(n, "name");
    String *tdname = Getattr(n, "tdname");
    String *unnamed = Getattr(n, "unnamed");
    String *storage = Getattr(n, "storage");
    String *kind = Getattr(n, "kind");
    Node *oldinclass = inclass;
    List *olist = normalize;
    Symtab *symtab;
    String *nname = 0;
    String *fname = 0;
    String *scopename = 0;

    normalize = NewList();

    if (name) {
      if (SwigType_istemplate(name)) {
	// We need to fully resolve the name to make templates work correctly */
	Node *cn;
	fname = SwigType_typedef_resolve_all(name);
	if (Strcmp(fname, name) != 0 && (cn = Swig_symbol_clookup_local(fname, 0))) {
	  if ((n == cn)
	      || (Strcmp(nodeType(cn), "template") == 0)
	      || (Getattr(cn, "feature:onlychildren") != 0)
	      || (Getattr(n, "feature:onlychildren") != 0)) {
	    Swig_symbol_cadd(fname, n);
	    SwigType_typedef_class(fname);
	    scopename = Copy(fname);
	  } else {
	    Swig_warning(WARN_TYPE_REDEFINED, Getfile(n), Getline(n), "Template '%s' was already wrapped,\n", SwigType_namestr(name));
	    Swig_warning(WARN_TYPE_REDEFINED, Getfile(cn), Getline(cn), "previous wrap of '%s'.\n", SwigType_namestr(Getattr(cn, "name")));
	    scopename = 0;
	  }
	} else {
	  Swig_symbol_cadd(fname, n);
	  SwigType_typedef_class(fname);
	  scopename = Copy(fname);
	}
      } else {
	if ((CPlusPlus) || (unnamed)) {
	  SwigType_typedef_class(name);
	} else {
	  SwigType_typedef_class(NewStringf("%s %s", kind, name));
	}
	scopename = Copy(name);
      }
    } else {
      scopename = 0;
    }

    Setattr(n, "typepass:visit", "1");

    /* Need to set up a typedef if unnamed */
    if (unnamed && tdname && (Cmp(storage, "typedef") == 0)) {
      SwigType_typedef(unnamed, tdname);
    }

    if (nsname) {
      nname = NewStringf("%s::%s", nsname, name);
      String *tdname = Getattr(n, "tdname");
      if (tdname) {
	tdname = NewStringf("%s::%s", nsname, tdname);
	Setattr(n, "tdname", tdname);
      }
    }
    SwigType_new_scope(scopename);
    SwigType_attach_symtab(Getattr(n, "symtab"));

    /* Inherit type definitions into the class */
    if (name) {
      cplus_inherit_types(n, 0, nname ? nname : (fname ? fname : name));
    }

    inclass = n;
    symtab = Swig_symbol_setscope(Getattr(n, "symtab"));
    emit_children(n);
    Swig_symbol_setscope(symtab);

    Hash *ts = SwigType_pop_scope();
    Setattr(n, "typescope", ts);
    Delete(ts);
    Setattr(n, "module", module);

    /* Normalize deferred types */
    {
      normal_node *nn = new normal_node();
      nn->normallist = normalize;
      nn->symtab = Getattr(n, "symtab");
      nn->next = patch_list;
      nn->typescope = Getattr(n, "typescope");
      patch_list = nn;
    }

    normalize = olist;

    inclass = oldinclass;

    /* If in a namespace, patch the class name */
    if (nname) {
      Setattr(n, "name", nname);
      Delete(nname);
    }
    return SWIG_OK;
  }

  /* ------------------------------------------------------------
   * namespaceDeclaration()
   * ------------------------------------------------------------ */

  virtual int templateDeclaration(Node *n) {
    String *name = Getattr(n, "name");
    String *ttype = Getattr(n, "templatetype");
    if (Strcmp(ttype, "class") == 0) {
      String *rname = SwigType_typedef_resolve_all(name);
      SwigType_typedef_class(rname);
      Delete(rname);
    } else if (Strcmp(ttype, "classforward") == 0) {
      String *rname = SwigType_typedef_resolve_all(name);
      SwigType_typedef_class(rname);
      Delete(rname);
      /*      SwigType_typedef_class(name); */
    }
    return SWIG_OK;
  }

  /* ------------------------------------------------------------
   * classforwardDeclaration()
   * ------------------------------------------------------------ */

  virtual int classforwardDeclaration(Node *n) {

    /* Temporary hack. Can't do inside a class because it breaks
       C nested structure wrapping */

    if ((!inclass) || (CPlusPlus)) {
      String *name = Getattr(n, "name");
      String *nname;
      SwigType_typedef_class(name);
      if (nsname) {
	nname = NewStringf("%s::%s", nsname, name);
	Setattr(n, "name", nname);
      }

    }
    return SWIG_OK;
  }

  /* ------------------------------------------------------------
   * namespaceDeclaration()
   * ------------------------------------------------------------ */

  virtual int namespaceDeclaration(Node *n) {
    Symtab *symtab;
    String *name = Getattr(n, "name");
    String *alias = Getattr(n, "alias");
    List *olist = normalize;
    normalize = NewList();
    if (alias) {
      Typetab *ts = Getattr(n, "typescope");
      if (!ts) {
	Node *ns;
	/* Create a empty scope for the alias */
	ns = Getattr(n, "namespace");
	if (ns) {
	  SwigType_scope_alias(name, Getattr(ns, "typescope"));
	}
	ts = Getattr(ns, "typescope");
	Setattr(n, "typescope", ts);
      }
      /* Namespace alias */
      return SWIG_OK;
    } else {
      if (name) {
	Node *nn = Swig_symbol_clookup(name, n);
	Hash *ts = Getattr(nn, "typescope");
	if (!ts) {
	  SwigType_new_scope(name);
	  SwigType_attach_symtab(Getattr(n, "symtab"));
	} else {
	  SwigType_set_scope(ts);
	}
      }
      String *oldnsname = nsname;
      nsname = Swig_symbol_qualified(Getattr(n, "symtab"));
      symtab = Swig_symbol_setscope(Getattr(n, "symtab"));
      emit_children(n);
      Swig_symbol_setscope(symtab);

      if (name) {
	Hash *ts = SwigType_pop_scope();
	Setattr(n, "typescope", ts);
	Delete(ts);
      }

      /* Normalize deferred types */
      {
	normal_node *nn = new normal_node();
	nn->normallist = normalize;
	nn->symtab = Getattr(n, "symtab");
	nn->next = patch_list;
	nn->typescope = Getattr(n, "typescope");
	patch_list = nn;
      }
      normalize = olist;

      Delete(nsname);
      nsname = oldnsname;
      return SWIG_OK;
    }
  }

  /* ------------------------------------------------------------
   * cDeclaration()
   * ------------------------------------------------------------ */

  virtual int cDeclaration(Node *n) {

    if (NoExcept) {
      Delattr(n, "throws");
    }

    /* Normalize types. */
    SwigType *ty = Getattr(n, "type");
    normalize_type(ty);
    SwigType *decl = Getattr(n, "decl");
    if (decl) {
      normalize_type(decl);
    }
    normalize_parms(Getattr(n, "parms"));
    normalize_parms(Getattr(n, "throws"));

    if (checkAttribute(n, "storage", "typedef")) {
      String *name = Getattr(n, "name");
      ty = Getattr(n, "type");
      decl = Getattr(n, "decl");
      SwigType *t = Copy(ty);
      {
	/* If the typename is qualified, make sure the scopename is fully qualified when making a typedef */
	if (Swig_scopename_check(t) && strncmp(Char(t), "::", 2)) {
	  String *base, *prefix, *qprefix;
	  base = Swig_scopename_last(t);
	  prefix = Swig_scopename_prefix(t);
	  qprefix = SwigType_typedef_qualified(prefix);
	  Delete(t);
	  t = NewStringf("%s::%s", qprefix, base);
	  Delete(base);
	  Delete(prefix);
	  Delete(qprefix);
	}
      }
      SwigType_push(t, decl);
      if (CPlusPlus) {
	Replaceall(t, "struct ", "");
	Replaceall(t, "union ", "");
	Replaceall(t, "class ", "");
      }
      SwigType_typedef(t, name);
    }
    /* If namespaces are active.  We need to patch the name with a namespace prefix */
    if (nsname && !inclass) {
      String *name = Getattr(n, "name");
      if (name) {
	String *nname = NewStringf("%s::%s", nsname, name);
	Setattr(n, "name", nname);
	Delete(nname);
      }
    }
    clean_overloaded(n);
    return SWIG_OK;
  }


  /* ------------------------------------------------------------
   * constructorDeclaration()
   * ------------------------------------------------------------ */

  virtual int constructorDeclaration(Node *n) {
    if (NoExcept) {
      Delattr(n, "throws");
    }

    normalize_parms(Getattr(n, "parms"));
    normalize_parms(Getattr(n, "throws"));

    /* If in a namespace, patch the class name */
    if (nsname) {
      String *nname = NewStringf("%s::%s", nsname, Getattr(n, "name"));
      Setattr(n, "name", nname);
    }
    clean_overloaded(n);
    return SWIG_OK;
  }

  /* ------------------------------------------------------------
   * destructorDeclaration()
   * ------------------------------------------------------------ */

  virtual int destructorDeclaration(Node *n) {
    /* If in a namespace, patch the class name */
    if (nsname) {
      String *nname = NewStringf("%s::%s", nsname, Getattr(n, "name"));
      Setattr(n, "name", nname);
    }
    return SWIG_OK;
  }

  /* ------------------------------------------------------------
   * constantDirective()
   * ------------------------------------------------------------ */

  virtual int constantDirective(Node *n) {
    SwigType *ty = Getattr(n, "type");
    if (ty) {
      Setattr(n, "type", SwigType_typedef_qualified(ty));
    }
    return SWIG_OK;
  }


  /* ------------------------------------------------------------
   * enumDeclaration()
   * ------------------------------------------------------------ */

  virtual int enumDeclaration(Node *n) {
    String *name = Getattr(n, "name");

    if (name) {
      String *scope = 0;

      // Add a typedef to the type table so that we can use 'enum Name' as well as just 'Name'
      if (nsname || inclass) {

	// But first correct the name and tdname to contain the fully qualified scopename
	if (nsname && inclass) {
	  scope = NewStringf("%s::%s", nsname, Getattr(inclass, "name"));
	} else if (nsname) {
	  scope = NewStringf("%s", nsname);
	} else if (inclass) {
	  scope = NewStringf("%s", Getattr(inclass, "name"));
	}

	String *nname = NewStringf("%s::%s", scope, name);
	Setattr(n, "name", nname);

	String *tdname = Getattr(n, "tdname");
	if (tdname) {
	  tdname = NewStringf("%s::%s", scope, tdname);
	  Setattr(n, "tdname", tdname);
	}

	SwigType *t = NewStringf("enum %s", nname);
	SwigType_typedef(t, name);
      } else {
	SwigType *t = NewStringf("enum %s", name);
	SwigType_typedef(t, name);
      }
      Delete(scope);
    }

    String *tdname = Getattr(n, "tdname");
    String *unnamed = Getattr(n, "unnamed");
    String *storage = Getattr(n, "storage");

    // Construct enumtype - for declaring an enum of this type with SwigType_ltype() etc
    String *enumtype = 0;
    if (unnamed && tdname && (Cmp(storage, "typedef") == 0)) {
      enumtype = Copy(Getattr(n, "tdname"));
    } else if (name) {
      enumtype = NewStringf("%s%s", CPlusPlus ? "" : "enum ", Getattr(n, "name"));
    } else {
      // anonymous enums
      enumtype = Copy(Getattr(n, "type"));
    }
    Setattr(n, "enumtype", enumtype);

    emit_children(n);
    return SWIG_OK;
  }

  /* ------------------------------------------------------------
   * enumvalueDeclaration()
   * ------------------------------------------------------------ */

  virtual int enumvalueDeclaration(Node *n) {
    String *name = Getattr(n, "name");
    String *value = Getattr(n, "value");
    if (!value)
      value = name;
    if (Strcmp(value, name) == 0) {
      String *new_value;
      if (((nsname) || (inclass)) && cparse_cplusplus) {
	new_value = NewStringf("%s::%s", SwigType_namestr(Swig_symbol_qualified(n)), value);
      } else {
	new_value = NewString(value);
      }
      Setattr(n, "value", new_value);
      Delete(new_value);
    }
    // Make up an enumvalue if one was not specified in the parsed code
    if (Getattr(n, "_last") && !Getattr(n, "enumvalue")) {	// Only the first enum item has _last set
      Setattr(n, "enumvalueex", "0");
    }
    Node *next = nextSibling(n);
    if (next && !Getattr(next, "enumvalue")) {
      Setattr(next, "enumvalueex", NewStringf("%s + 1", Getattr(n, "sym:name")));
    }

    return SWIG_OK;
  }

  /* ------------------------------------------------------------
   * enumforwardDeclaration()
   * ------------------------------------------------------------ */

  virtual int enumforwardDeclaration(Node *n) {

    // Use enumDeclaration() to do all the hard work.
    // Note that no children can be emitted in a forward declaration as there aren't any.
    return enumDeclaration(n);
  }

  /* ------------------------------------------------------------
   * usingDeclaration()
   * ------------------------------------------------------------ */

  virtual int usingDeclaration(Node *n) {
    if (Getattr(n, "namespace")) {
      /* using namespace id */

      /* For a namespace import.   We set up inheritance in the type system */
      Node *ns = Getattr(n, "node");
      if (ns) {
	Typetab *ts = Getattr(ns, "typescope");
	if (ts) {
	  SwigType_using_scope(ts);
	}
      }
      return SWIG_OK;
    } else {
      Node *ns;
      /* using id */
      Symtab *stab = Getattr(n, "sym:symtab");
      if (stab) {
	String *uname = Getattr(n, "uname");
	ns = Swig_symbol_clookup(uname, stab);
	if (!ns && SwigType_istemplate(uname)) {
	  String *tmp = Swig_symbol_template_deftype(uname, 0);
	  if (!Equal(tmp, uname)) {
	    ns = Swig_symbol_clookup(tmp, stab);
	  }
	  Delete(tmp);
	}
      } else {
	ns = 0;
      }
      if (!ns) {
	if (is_public(n)) {
	  Swig_warning(WARN_PARSE_USING_UNDEF, Getfile(n), Getline(n), "Nothing known about '%s'.\n", SwigType_namestr(Getattr(n, "uname")));
	}
      } else {

	/* Only a single symbol is being used.  There are only a few symbols that
	   we actually care about.  These are typedef, class declarations, and enum */

	String *ntype = nodeType(ns);
	if (Strcmp(ntype, "cdecl") == 0) {
	  if (checkAttribute(ns, "storage", "typedef")) {
	    /* A typedef declaration */
	    String *uname = Getattr(n, "uname");
	    SwigType_typedef_using(uname);
	  } else {
	    /* A normal C declaration. */
	    if ((inclass) && (!GetFlag(n, "feature:ignore")) && (Getattr(n, "sym:name"))) {
	      Node *c = ns;
	      Node *unodes = 0, *last_unodes = 0;
	      int ccount = 0;
	      String *symname = Getattr(n, "sym:name");
	      while (c) {
		if (Strcmp(nodeType(c), "cdecl") == 0) {
		  if (!(checkAttribute(c, "storage", "static")
			|| checkAttribute(c, "storage", "typedef")
			|| checkAttribute(c, "storage", "friend")
			|| (Getattr(c, "feature:extend") && !Getattr(c, "code"))
			|| GetFlag(c, "feature:ignore"))) {

		    String *csymname = Getattr(c, "sym:name");
		    if (!csymname || (Strcmp(csymname, symname) == 0)) {
		      /* Check for existence in overload list already */
		      {
			String *decl = Getattr(c, "decl");
			Node *over = Getattr(n, "sym:overloaded");
			int match = 0;
			while (over) {
			  String *odecl = Getattr(over, "decl");
			  if (Cmp(decl, odecl) == 0) {
			    match = 1;
			    break;
			  }
			  over = Getattr(over, "sym:nextSibling");
			}
			if (match) {
			  c = Getattr(c, "csym:nextSibling");
			  continue;
			}
		      }
		      Node *nn = copyNode(c);
		      Delattr(nn, "access");	// access might be different from the method in the base class
		      if (!Getattr(nn, "sym:name"))
			Setattr(nn, "sym:name", symname);

		      if (!GetFlag(nn, "feature:ignore")) {
			ParmList *parms = CopyParmList(Getattr(c, "parms"));
			int is_pointer = SwigType_ispointer_return(Getattr(nn, "decl"));
			int is_void = checkAttribute(nn, "type", "void") && !is_pointer;
			Setattr(nn, "parms", parms);
			Delete(parms);
			if (Getattr(n, "feature:extend")) {
			  String *ucode = is_void ? NewStringf("{ self->%s(", Getattr(n, "uname")) : NewStringf("{ return self->%s(", Getattr(n, "uname"));

			  for (ParmList *p = parms; p;) {
			    StringAppend(ucode, HashGetAttr(p, k_name));
			    p = nextSibling(p);
			    if (p)
			      StringAppend(ucode, ",");
			  }
			  StringAppend(ucode, "); }");
			  Setattr(nn, "code", ucode);
			  Delete(ucode);
			}
			ParmList *throw_parm_list = Getattr(c, "throws");
			if (throw_parm_list)
			  Setattr(nn, "throws", CopyParmList(throw_parm_list));
			ccount++;
			if (!last_unodes) {
			  last_unodes = nn;
			  unodes = nn;
			} else {
			  Setattr(nn, "previousSibling", last_unodes);
			  Setattr(last_unodes, "nextSibling", nn);
			  Setattr(nn, "sym:previousSibling", last_unodes);
			  Setattr(last_unodes, "sym:nextSibling", nn);
			  Setattr(nn, "sym:overloaded", unodes);
			  Setattr(unodes, "sym:overloaded", unodes);
			  last_unodes = nn;
			}
		      } else {
			Delete(nn);
		      }
		    }
		  }
		}
		c = Getattr(c, "csym:nextSibling");
	      }
	      if (unodes) {
		set_firstChild(n, unodes);
		if (ccount > 1) {
		  if (!Getattr(n, "sym:overloaded")) {
		    Setattr(n, "sym:overloaded", n);
		    Setattr(n, "sym:overname", "_SWIG_0");
		  }
		}
	      }
	    }
	  }
	} else if ((Strcmp(ntype, "class") == 0) || ((Strcmp(ntype, "classforward") == 0))) {
	  /* We install the using class name as kind of a typedef back to the original class */
	  String *uname = Getattr(n, "uname");
	  /* Import into current type scope */
	  SwigType_typedef_using(uname);
	} else if (Strcmp(ntype, "enum") == 0) {
	  SwigType_typedef_using(Getattr(n, "uname"));
	}
      }
    }
    return SWIG_OK;
  }

  /* ------------------------------------------------------------
   * typemapDirective()
   * ------------------------------------------------------------ */

  virtual int typemapDirective(Node *n) {
    if (inclass || nsname) {
      Node *items = firstChild(n);
      while (items) {
	Parm *pattern = Getattr(items, "pattern");
	Parm *parms = Getattr(items, "parms");
	normalize_later(pattern);
	normalize_later(parms);
	items = nextSibling(items);
      }
    }
    return SWIG_OK;
  }


  /* ------------------------------------------------------------
   * typemapcopyDirective()
   * ------------------------------------------------------------ */

  virtual int typemapcopyDirective(Node *n) {
    if (inclass || nsname) {
      Node *items = firstChild(n);
      ParmList *pattern = Getattr(n, "pattern");
      normalize_later(pattern);
      while (items) {
	ParmList *npattern = Getattr(items, "pattern");
	normalize_later(npattern);
	items = nextSibling(items);
      }
    }
    return SWIG_OK;
  }

  /* ------------------------------------------------------------
   * applyDirective()
   * ------------------------------------------------------------ */

  virtual int applyDirective(Node *n) {
    if (inclass || nsname) {
      ParmList *pattern = Getattr(n, "pattern");
      normalize_later(pattern);
      Node *items = firstChild(n);
      while (items) {
	Parm *apattern = Getattr(items, "pattern");
	normalize_later(apattern);
	items = nextSibling(items);
      }
    }
    return SWIG_OK;
  }

  /* ------------------------------------------------------------
   * clearDirective()
   * ------------------------------------------------------------ */

  virtual int clearDirective(Node *n) {
    if (inclass || nsname) {
      Node *p;
      for (p = firstChild(n); p; p = nextSibling(p)) {
	ParmList *pattern = Getattr(p, "pattern");
	normalize_later(pattern);
      }
    }
    return SWIG_OK;
  }

public:
  static void pass(Node *n) {
    TypePass t;
    t.top(n);
  }
};

void Swig_process_types(Node *n) {
  if (!n)
    return;
  TypePass::pass(n);
}