private void ParseCpp(string input)
{
AntlrInputStream stream = new AntlrInputStream(input);
ITokenSource lexer = new CPP14Lexer(stream);
ITokenStream tokens = new CommonTokenStream(lexer);
CPP14Parser parser = new CPP14Parser(tokens);
parser.BuildParseTree = true;
CPP14Parser.TranslationunitContext tree = parser.translationunit();
if (tree != null)
{
var builder = new TreeBuilder(parser, tree, treeModel);
builder.Build();
}
}
public override void Parse(FileInfo file)
{
Lexer lexer = new CPP14Lexer(CharStreams.fromPath(file.FullName));
CommonTokenStream tokens = new CommonTokenStream(lexer);
CPP14Parser parser = new CPP14Parser(tokens);
ParserRuleContext context = parser.translationunit();
var children = context.children;
foreach (IParseTree child in children)
{
this.ParseNode(child);
}
}
static void Main(string[] args)
{
var input = @"
#include <iostream>
using namespace std;
void main()
{
cout << ""Hello World!"";
if(true)
cout <<""good"";
for (int i = 0; i < 10; i++)
{
cout << i + ""-"";
cout << 2i + ""XX"";
}
}
";
Console.WriteLine("Input:");
Console.WriteLine(input);
AntlrInputStream inputStream = new AntlrInputStream(input);
CPP14Lexer lexer = new CPP14Lexer(inputStream);
CommonTokenStream commonTokenStream = new CommonTokenStream(lexer);
CPP14Parser parser = new CPP14Parser(commonTokenStream);
parser.BuildParseTree = true;
IParseTree tree = parser.translationunit(); //first row of grammer in *.g4 file >> first rule
ReplaceExpression replaceExpression = new ReplaceExpression(commonTokenStream);
ParseTreeWalker.Default.Walk(replaceExpression, tree);
// BVisitor visitor = new BVisitor();
// Console.WriteLine(visitor.Visit(tree));
Console.WriteLine("////////////////////////////////////////////////////////////////////////");
Console.WriteLine("Output:");
Console.WriteLine(replaceExpression);
}
public string Tokenize(string fileContent)
{
AntlrInputStream inputStream = new AntlrInputStream(fileContent);
CPP14Lexer lexer = new CPP14Lexer(inputStream);
Antlr4.Runtime.CommonTokenStream tokenStream = new Antlr4.Runtime.CommonTokenStream(lexer);
tokenStream.Fill();
string result = "";
IList <Antlr4.Runtime.IToken> tokens = tokenStream.GetTokens();
foreach (var token in tokens)
{
result += (token.Type == CPP14Lexer.Identifier) ? "ID" : token.Text;
}
result = result.Replace("<EOF>", "");
return(result);
}
do_parse
(
string Declaration
)
{
//
// Declare the various streams of characters and tokens for parsing the input
//
AntlrInputStream input_stream = new AntlrInputStream(Declaration); // Create a stream that reads from the input source
CPP14Lexer lexer = new CPP14Lexer(input_stream); // Create a lexer that feeds off of the input stream
CommonTokenStream tokens = new CommonTokenStream(lexer); // Create a buffer of tokens pulled from the lexer
CPP14Parser parser = new CPP14Parser(tokens); // Create a parser that feeds off of the token buffer
ParserRuleContext tree = parser.translationunit(); // Call the translationunit rule in the grammar to build a parse tree from the input
CPP14_Listener_Overrides my_listeners = new CPP14_Listener_Overrides(); // Instantiate my listener override functions so they can be used by ParseTreeWalker
//
// Call all the listeners
//
ParseTreeWalker.Default.Walk(my_listeners, tree);
return(my_listeners.function_def);
} // End parse_declaration
static void Main(string[] args)
{
var input = @"
#include <iostream>
using namespace std;
void main()
{
cout << ""Hello World!"";
int x = 2;
if(x == 2)
{
int y = 2;
x = 20 * y;
}
if(x<1)
{
cout <<""bad"";
}else {
cout <<""good"";
}
for (int i = 0; i < 10; i++)
{
cout << i + ""-"";
cout << 2i + ""XX"";
}
}
";
Console.WriteLine("Input:");
Console.WriteLine(input);
AntlrInputStream inputStream = new AntlrInputStream(input);
CPP14Lexer lexer = new CPP14Lexer(inputStream);
CommonTokenStream commonTokenStream = new CommonTokenStream(lexer);
CPP14Parser parser = new CPP14Parser(commonTokenStream);
parser.BuildParseTree = true;
IParseTree tree = parser.translationunit(); //first row of grammer in *.g4 file >> first rule
ReplaceExpression replaceExpression = new ReplaceExpression(commonTokenStream);
ParseTreeWalker.Default.Walk(replaceExpression, tree);
// BVisitor visitor = new BVisitor();
// Console.WriteLine(visitor.Visit(tree));
Console.WriteLine("////////////////////////////////////////////////////////////////////////");
Console.WriteLine("Output:");
var resultString = Regex.Replace(replaceExpression.ToString(), @"^\s+$[\r\n]*", string.Empty,
RegexOptions.Multiline);
resultString = Regex.Replace(resultString, @"^\s+", string.Empty, RegexOptions.Multiline);
Console.WriteLine(resultString);
}
