Add Cpp port, clean up CSharp code.

cpp/CPP14Parser.g4

@@ -20,10 +20,14 @@
  * ****************************************************************************
  */
 parser grammar CPP14Parser;
+
 options {
 	superClass = CPP14ParserBase;
 	tokenVocab = CPP14Lexer;
 }
+
+// Insert here @header for C++ parser.
+
 /*Basic concepts*/
 
 translationUnit: declarationseq? EOF;

cpp/CSharp/CPP14ParserBase.cs

@@ -3,12 +3,12 @@
 
 public abstract class CPP14ParserBase : Parser {
 
-	protected CPP14ParserBase(ITokenStream input, TextWriter output, TextWriter errorOutput)
-			: base(input, output, errorOutput)
-	{
-	}
+    protected CPP14ParserBase(ITokenStream input, TextWriter output, TextWriter errorOutput)
+        : base(input, output, errorOutput)
+    {
+    }
 
-	public bool IsPureSpecifierAllowed()
+    public bool IsPureSpecifierAllowed()
     {
         try
         {

cpp/Cpp/CPP14ParserBase.cpp

@@ -0,0 +1,20 @@
+#include "CPP14Parser.h"
+
+using namespace antlr4;
+
+bool CPP14ParserBase::IsPureSpecifierAllowed()
+{
+    try
+    {
+        auto x = this->getRuleContext(); // memberDeclarator
+        auto c = x->children[0]->children[0];
+        auto c2 = c->children[0];
+        auto p = c2->children[1];
+	if (p == nullptr) return false;
+	return typeid(*p) == typeid(CPP14Parser::ParametersAndQualifiersContext);
+    }
+    catch (...)
+    {
+    }
+    return false;
+}

cpp/Cpp/CPP14ParserBase.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include "antlr4-runtime.h"
+
+class CPP14ParserBase : public antlr4::Parser {
+public:
+    CPP14ParserBase(antlr4::TokenStream *input) : Parser(input) { }
+    bool IsPureSpecifierAllowed();
+};

cpp/Cpp/transformGrammar.py

@@ -0,0 +1,33 @@
+import sys, os, re, shutil
+from glob import glob
+from pathlib import Path
+
+def main(argv):
+    for file in glob("./*.g4"):
+        fix(file)
+
+def fix(file_path):
+    print("Altering " + file_path)
+    if not os.path.exists(file_path):
+        print(f"Could not find file: {file_path}")
+        sys.exit(1)
+    parts = os.path.split(file_path)
+    file_name = parts[-1]
+
+    shutil.move(file_path, file_path + ".bak")
+    input_file = open(file_path + ".bak",'r')
+    output_file = open(file_path, 'w')
+    for x in input_file:
+        if '// Insert here @header for C++ parser.' in x:
+            x = x.replace('// Insert here @header for C++ parser.', '@header {#include "CPP14ParserBase.h"}')
+        if 'this.' in x:
+            x = x.replace('this.', 'this->')
+        output_file.write(x)
+        output_file.flush()
+
+    print("Writing ...")
+    input_file.close()
+    output_file.close()
+
+if __name__ == '__main__':
+    main(sys.argv)

cpp/desc.xml

@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <desc xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../_scripts/desc.xsd">
-   <targets>CSharp;Dart;Java;JavaScript</targets>
+   <targets>Cpp;CSharp;Dart;Java;JavaScript</targets>
 </desc>