Added initial support for C++0x decltype().

Added testcase cpp0x_decltype.


git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/branches/gsoc2009-matevz@11525 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/common.mk

@@ -411,7 +411,8 @@ CPP0X_TEST_CASES = \
 	cpp0x_rvalue_reference \
 	cpp0x_variadic_templates \
         cpp0x_alternate_function_syntax \
-	cpp0x_userdefined_literals
+	cpp0x_userdefined_literals \
+	cpp0x_decltype
 #	cpp0x_hash_types # not fully implemented yet
 #	cpp0x_lambda_functions      # not supported by GCC or MSVC yet
 #	cpp0x_null_pointer_constant # not supported by any compilers yet

Examples/test-suite/cpp0x_decltype.i

@@ -0,0 +1,19 @@
+/* This testcase checks whether Swig correctly uses the new 'decltype()'
+   introduced in C++0x.
+*/
+%module cpp0x_decltype
+
+%inline %{
+class A {
+public:
+        int i;
+        decltype(i) j;
+        
+        auto foo( decltype(i) a ) -> decltype(i) {
+                if (a==5)
+                        return 10;
+                else
+                        return 0;
+        }
+};
+%}

Examples/test-suite/python/cpp0x_decltype_runme.py

@@ -0,0 +1,19 @@
+import cpp0x_decltype
+
+a = cpp0x_decltype.A()
+a.i = 5
+if a.i != 5:
+	raise RuntimeError, "Assignment to a.i failed."
+
+a.j = 10
+if a.j != 10:
+	raise RuntimeError, "Assignment to a.j failed."
+
+b = a.foo(5)
+if b != 10:
+	raise RuntimeError, "foo(5) should return 10."
+
+b = a.foo(6)
+if b != 0:
+	raise RuntimeError, "foo(6) should return 0."
+

Source/CParse/cscanner.c

@@ -636,6 +636,8 @@ int yylex(void) {
 	  return (CONSTEXPR);
 	if (strcmp(yytext, "thread_local") == 0)
 	  return (THREAD_LOCAL);
+	if (strcmp(yytext, "decltype") == 0)
+	  return (DECLTYPE);
 	if (strcmp(yytext, "virtual") == 0)
 	  return (VIRTUAL);
 	if (strcmp(yytext, "static_assert") == 0)

Source/CParse/parser.y

@@ -1493,7 +1493,7 @@ static void tag_nodes(Node *n, const_String_or_char_ptr attrname, DOH *value) {
 %token NAME RENAME NAMEWARN EXTEND PRAGMA FEATURE VARARGS
 %token ENUM
 %token CLASS TYPENAME PRIVATE PUBLIC PROTECTED COLON STATIC VIRTUAL FRIEND THROW CATCH EXPLICIT AUTO
-%token STATIC_ASSERT CONSTEXPR THREAD_LOCAL /* C++0x keywords */
+%token STATIC_ASSERT CONSTEXPR THREAD_LOCAL DECLTYPE /* C++0x keywords */
 %token USING
 %token <node> NAMESPACE
 %token NATIVE INLINE
@@ -1557,7 +1557,7 @@ static void tag_nodes(Node *n, const_String_or_char_ptr attrname, DOH *value) {
 %type <p>        templateparameter ;
 %type <id>       templcpptype cpptype access_specifier;
 %type <node>     base_specifier
-%type <type>     type rawtype type_right anon_bitfield_type ;
+%type <type>     type rawtype type_right anon_bitfield_type decltype ;
 %type <bases>    base_list inherit raw_inherit;
 %type <dtype>    definetype def_args etype;
 %type <dtype>    expr exprnum exprcompound valexpr;
@@ -3128,6 +3128,7 @@ cpp_alternate_rettype : primitive_type { $$ = $1; }
               | TYPE_TYPEDEF template_decl { $$ = NewStringf("%s%s",$1,$2); }
               | TYPE_RAW { $$ = $1; }
               | idcolon { $$ = $1; }
+              | decltype { $$ = $1; }
               ;
 
 /* Lambda function syntax introduced in C++0x.
@@ -5471,6 +5472,19 @@ type_right     : primitive_type { $$ = $1;
                | cpptype idcolon { 
 		 $$ = NewStringf("%s %s", $1, $2);
                }
+               | decltype {
+                 $$ = $1;
+               }
+               ;
+
+decltype       : DECLTYPE LPAREN idcolon RPAREN {
+                 Node *n = Swig_symbol_clookup($3,0);
+                 if (!n) {
+		   Swig_error(cparse_file, cparse_line, "Identifier %s not defined.\n", $3);
+                 } else {
+                   $$ = Getattr(n, "type");
+                 }
+               }
                ;
 
 primitive_type : primitive_type_list {