C++ front-end: support =delete method declarations

This enables us to use use cassert instead of assert.h in C++ regression tests,
as Visual Studio's header files make use of this. =delete and =default are C++11
(and later) only, make sure the parser is sufficiently restrictive.

Author: tautschnig

regression/cpp/Method_qualifier1/main.cpp

@@ -1,4 +1,4 @@
-#include <assert.h>
+#include <cassert>
 
 class my_class
 {

regression/cpp/auto1/main.cpp

@@ -1,4 +1,4 @@
-#include <assert.h>
+#include <cassert>
 
 const auto i=1;
 

regression/cpp/deleted_function1/main.cpp

@@ -0,0 +1,19 @@
+class A
+{
+public:
+  void foo() {}
+};
+
+class B : public A
+{
+public:
+  void foo() = delete;
+};
+
+int main()
+{
+  B b;
+  b.foo();
+
+  return 0;
+}

regression/cpp/deleted_function1/test.desc

@@ -0,0 +1,8 @@
+CORE
+main.cpp
+-std=c++11
+^EXIT=(64|1)$
+^SIGNAL=0$
+not accessible
+--
+^warning: ignoring

regression/cpp/switch1/main.cpp

@@ -1,4 +1,4 @@
-#include <assert.h>
+#include <cassert>
 
 int main()
 {

regression/systemc/Array1/main.cpp

@@ -1,4 +1,4 @@
-#include <assert.h>
+#include <cassert>
 
 #define COPY
 

regression/systemc/Array2/main.cpp

@@ -1,4 +1,4 @@
-#include <assert.h>
+#include <cassert>
 
 class myarray {
 

regression/systemc/Array3/main.cpp

@@ -1,4 +1,4 @@
-#include <assert.h>
+#include <cassert>
 
 #define FUNCTION
 

regression/systemc/Array4/main.cpp

@@ -1,4 +1,4 @@
-#include <assert.h>
+#include <cassert>
 
 #define CLASS
 

regression/systemc/BitvectorCpp1/main.cpp

@@ -1,4 +1,4 @@
-#include <assert.h>
+#include <cassert>
 
 int main(int argc, char** argv)
 {