Cleanup the C++ front-end.

Removed CPLUSPLUS_BEGIN/END_NAMESPACE & co and made it possible to compile the parser with CPLUSPLUS_WITHOUT_QT.

src/shared/cplusplus/CheckExpression.cpp

@@ -56,7 +56,7 @@
 #include "Symbols.h"
 #include "Control.h"
 
-CPLUSPLUS_BEGIN_NAMESPACE
+using namespace CPlusPlus;
 
 CheckExpression::CheckExpression(Semantic *semantic)
     : SemanticCheck(semantic),
@@ -207,7 +207,6 @@ bool CheckExpression::visit(NewExpressionAST *ast)
     if (ast->new_placement) {
         for (ExpressionListAST *it = ast->new_placement->expression_list; it; it = it->next) {
             FullySpecifiedType exprTy = semantic()->check(it->expression, _scope);
-            Q_UNUSED(exprTy)
         }
     }
 
@@ -215,18 +214,15 @@ bool CheckExpression::visit(NewExpressionAST *ast)
 
     if (ast->new_type_id) {
         FullySpecifiedType ty = semantic()->check(ast->new_type_id->type_specifier, _scope);
-        Q_UNUSED(ty)
 
         for (NewArrayDeclaratorAST *it = ast->new_type_id->new_array_declarators; it; it = it->next) {
             FullySpecifiedType exprTy = semantic()->check(it->expression, _scope);
-            Q_UNUSED(exprTy)
         }
     }
 
     // ### process new-initializer
     if (ast->new_initializer) {
         FullySpecifiedType exprTy = semantic()->check(ast->new_initializer->expression, _scope);
-        Q_UNUSED(exprTy)
     }
 
     return false;
@@ -397,4 +393,4 @@ bool CheckExpression::visit(ObjCSelectorExpressionAST *ast)
     return false;
 }
 
-CPLUSPLUS_END_NAMESPACE
+