private CSharpParser.Compilation_unitContext ParseFile(string file)
{
IList <IToken> codeTokens = new List <IToken>();
string sourceCode = File.ReadAllText(file);
Lexer preprocessorLexer = new CSharpLexer(new AntlrInputStream(sourceCode));
IList <IToken> tokens = preprocessorLexer.GetAllTokens();
IList <IToken> directiveTokens = new List <IToken>();
ListTokenSource directiveTokenSource = new ListTokenSource(directiveTokens);
CommonTokenStream directiveTokenStream = new CommonTokenStream(directiveTokenSource, CSharpLexer.DIRECTIVE);
CSharpPreprocessorParser preprocessorParser = new CSharpPreprocessorParser(directiveTokenStream);
int index = 0;
bool compiliedTokens = true;
while (index < tokens.Count)
{
IToken token = tokens[index];
if (token.Type == CSharpLexer.SHARP)
{
directiveTokens.Clear();
int directiveTokenIndex = index + 1;
while (directiveTokenIndex < tokens.Count &&
tokens[directiveTokenIndex].Type != CSharpLexer.Eof &&
tokens[directiveTokenIndex].Type != CSharpLexer.DIRECTIVE_NEW_LINE &&
tokens[directiveTokenIndex].Type != CSharpLexer.SHARP)
{
if (tokens[directiveTokenIndex].Channel != Lexer.Hidden &&
tokens[directiveTokenIndex].Channel != CSharpLexer.COMMENTS_CHANNEL)
{
directiveTokens.Add(tokens[directiveTokenIndex]);
}
directiveTokenIndex++;
}
directiveTokenSource = new ListTokenSource(directiveTokens);
directiveTokenStream = new CommonTokenStream(directiveTokenSource, CSharpLexer.DIRECTIVE);
preprocessorParser.TokenStream = directiveTokenStream;
CSharpPreprocessorParser.Preprocessor_directiveContext directive =
preprocessorParser.preprocessor_directive();
// if true than next code is valid and not ignored.
compiliedTokens = directive.value;
index = directiveTokenIndex - 1;
}
else if (token.Channel != Lexer.Hidden && token.Type != CSharpLexer.DIRECTIVE_NEW_LINE &&
token.Channel != CSharpLexer.COMMENTS_CHANNEL &&
compiliedTokens)
{
codeTokens.Add(token); // Collect code tokens.
}
index++;
}
ListTokenSource codeTokenSource = new ListTokenSource(codeTokens);
CommonTokenStream codeTokenStream = new CommonTokenStream(codeTokenSource);
CSharpParser parser = new CSharpParser(codeTokenStream);
return(parser.compilation_unit());
}
/// <summary>
/// Exit a parse tree produced by <see cref="CSharpPreprocessorParser.preprocessor_directive"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitPreprocessor_directive([NotNull] CSharpPreprocessorParser.Preprocessor_directiveContext context)
{
}
static void Try(string ffn)
{
var sourceCode = System.IO.File.ReadAllText(ffn);
List <IToken> codeTokens = new List <IToken>();
List <IToken> commentTokens = new List <IToken>();
Lexer preprocessorLexer = new CSharpLexer(new AntlrInputStream(sourceCode));
// Collect all tokens with lexer (CSharpLexer.g4).
var tokens = preprocessorLexer.GetAllTokens();
var directiveTokens = new List <IToken>();
var directiveTokenSource = new ListTokenSource(directiveTokens);
var directiveTokenStream = new CommonTokenStream(directiveTokenSource, CSharpLexer.DIRECTIVE);
CSharpPreprocessorParser preprocessorParser = new CSharpPreprocessorParser(directiveTokenStream);
int index = 0;
bool compiliedTokens = true;
while (index < tokens.Count)
{
var token = tokens[index];
if (token.Type == CSharpLexer.SHARP)
{
directiveTokens.Clear();
int directiveTokenIndex = index + 1;
// Collect all preprocessor directive tokens.
while (directiveTokenIndex < tokens.Count &&
tokens[directiveTokenIndex].Type != CSharpLexer.Eof &&
tokens[directiveTokenIndex].Type != CSharpLexer.DIRECTIVE_NEW_LINE &&
tokens[directiveTokenIndex].Type != CSharpLexer.SHARP)
{
if (tokens[directiveTokenIndex].Channel == CSharpLexer.COMMENTS_CHANNEL)
{
commentTokens.Add(tokens[directiveTokenIndex]);
}
else if (tokens[directiveTokenIndex].Channel != Lexer.Hidden)
{
directiveTokens.Add(tokens[directiveTokenIndex]);
}
directiveTokenIndex++;
}
directiveTokenSource = new ListTokenSource(directiveTokens);
directiveTokenStream = new CommonTokenStream(directiveTokenSource, CSharpLexer.DIRECTIVE);
preprocessorParser.TokenStream = directiveTokenStream;
preprocessorParser.Reset();
// Parse condition in preprocessor directive (based on CSharpPreprocessorParser.g4 grammar).
CSharpPreprocessorParser.Preprocessor_directiveContext directive = preprocessorParser.preprocessor_directive();
// if true than next code is valid and not ignored.
compiliedTokens = directive.value;
var directiveStr = tokens[index + 1].Text.Trim();
if ("line".Equals(directiveStr) || "error".Equals(directiveStr) || "warning".Equals(directiveStr) || "define".Equals(directiveStr) || "endregion".Equals(directiveStr) || "endif".Equals(directiveStr) || "pragma".Equals(directiveStr))
{
compiliedTokens = true;
}
string conditionalSymbol = null;
if ("define".Equals(tokens[index + 1].Text))
{
// add to the conditional symbols
conditionalSymbol = tokens[index + 2].Text;
preprocessorParser.ConditionalSymbols.Add(conditionalSymbol);
}
if ("undef".Equals(tokens[index + 1].Text))
{
conditionalSymbol = tokens[index + 2].Text;
preprocessorParser.ConditionalSymbols.Remove(conditionalSymbol);
}
index = directiveTokenIndex - 1;
}
else if (token.Channel == CSharpLexer.COMMENTS_CHANNEL)
{
commentTokens.Add(token); // Colect comment tokens (if required).
}
else if (token.Channel != Lexer.Hidden && token.Type != CSharpLexer.DIRECTIVE_NEW_LINE && compiliedTokens)
{
codeTokens.Add(token); // Collect code tokens.
}
index++;
}
// At second stage tokens parsed in usual way.
var codeTokenSource = new ListTokenSource(codeTokens);
var codeTokenStream = new CommonTokenStream(codeTokenSource);
CSharpParser parser = new CSharpParser(codeTokenStream);
// Parse syntax tree (CSharpParser.g4)
var listener = new ErrorListener <IToken>(parser, preprocessorLexer, codeTokenStream);
parser.AddErrorListener(listener);
var tree = parser.compilation_unit();
if (listener.had_error)
{
System.Console.WriteLine("error in parse.");
}
else
{
System.Console.WriteLine("parse completed.");
}
System.Console.WriteLine(codeTokenStream.OutputTokens(preprocessorLexer));
System.Console.WriteLine(tree.OutputTree(codeTokenStream, preprocessorLexer));
}
public static void Main(string[] args)
{
try {
string[] files = Directory.GetFiles(".", "*.cs");
foreach (string file in files)
{
Console.WriteLine(file + "---------------------------------------");
//Read the file
string text = File.ReadAllText(file);
//Create the lexer
CSharpLexer lexer = new CSharpLexer(new AntlrInputStream(text));
var tokens = lexer.GetAllTokens();
List <IToken> codeTokens = new List <IToken>();
List <IToken> commentTokens = new List <IToken>();
var directiveTokens = new List <IToken>();
var directiveTokenSource = new ListTokenSource(directiveTokens);
var directiveTokenStream = new CommonTokenStream(directiveTokenSource, CSharpLexer.DIRECTIVE);
CSharpPreprocessorParser preprocessorParser = new CSharpPreprocessorParser(directiveTokenStream);
int index = 0;
bool compiliedTokens = true;
while (index < tokens.Count)
{
var token = tokens[index];
if (token.Type == CSharpLexer.SHARP)
{
directiveTokens.Clear();
int directiveTokenIndex = index + 1;
// Collect all preprocessor directive tokens.
while (directiveTokenIndex < tokens.Count &&
tokens[directiveTokenIndex].Type != CSharpLexer.Eof &&
tokens[directiveTokenIndex].Type != CSharpLexer.DIRECTIVE_NEW_LINE &&
tokens[directiveTokenIndex].Type != CSharpLexer.SHARP)
{
if (tokens[directiveTokenIndex].Channel == CSharpLexer.COMMENTS_CHANNEL)
{
commentTokens.Add(tokens[directiveTokenIndex]);
}
else if (tokens[directiveTokenIndex].Channel != Lexer.Hidden)
{
//Console.WriteLine(allTokens[directiveTokenIndex] + " HOLA");
directiveTokens.Add(tokens[directiveTokenIndex]);
}
directiveTokenIndex++;
}
directiveTokenSource = new ListTokenSource(directiveTokens);
directiveTokenStream = new CommonTokenStream(directiveTokenSource, CSharpLexer.DIRECTIVE);
preprocessorParser.TokenStream = directiveTokenStream;
//preprocessorParser.SetInputStream(directiveTokenStream);
preprocessorParser.Reset();
// Parse condition in preprocessor directive (based on CSharpPreprocessorParser.g4 grammar).
CSharpPreprocessorParser.Preprocessor_directiveContext directive = preprocessorParser.preprocessor_directive();
// if true than next code is valid and not ignored.
compiliedTokens = directive.value;
String directiveStr = tokens[index + 1].Text.Trim();
if ("line".Equals(directiveStr) || "error".Equals(directiveStr) || "warning".Equals(directiveStr) || "define".Equals(directiveStr) || "endregion".Equals(directiveStr) || "endif".Equals(directiveStr) || "pragma".Equals(directiveStr))
{
//Console.WriteLine(directiveStr);
compiliedTokens = true;
}
String conditionalSymbol = null;
if ("define".Equals(tokens[index + 1].Text))
{
// add to the conditional symbols
conditionalSymbol = tokens[index + 2].Text;
preprocessorParser.ConditionalSymbols.Add(conditionalSymbol);
}
if ("undef".Equals(tokens[index + 1].Text))
{
conditionalSymbol = tokens[index + 2].Text;
preprocessorParser.ConditionalSymbols.Remove(conditionalSymbol);
}
//This code deletes the directive tokens from the input so that they don't interfere with the parsing process
// In all of the cases, we have to remove at least two positions of the tokens array
tokens.RemoveAt(directiveTokenIndex - 1);
tokens.RemoveAt(directiveTokenIndex - 2);
if ("pragma".Equals(directiveStr) || "warning".Equals(directiveStr) || "region".Equals(directiveStr) || "error".Equals(directiveStr))
{
// Remove three positions before
tokens.RemoveAt(directiveTokenIndex - 3);
directiveTokenIndex--;
}
else if ("define".Equals(directiveStr) || "undef".Equals(directiveStr) || "if".Equals(directiveStr) || "elif".Equals(directiveStr) || "line".Equals(directiveStr))
{
// Remove four positions before
tokens.RemoveAt(directiveTokenIndex - 3);
tokens.RemoveAt(directiveTokenIndex - 4);
directiveTokenIndex -= 2;
}
directiveTokenIndex -= 2;
index = directiveTokenIndex - 1;
}
else if (token.Channel == CSharpLexer.COMMENTS_CHANNEL)
{
commentTokens.Add(token); // Colect comment tokens (if required).
}
else if (token.Channel != Lexer.Hidden && token.Type != CSharpLexer.DIRECTIVE_NEW_LINE && compiliedTokens)
{
codeTokens.Add(token); // Collect code tokens.
}
index++;
}
// At second stage tokens parsed in usual way.
var codeTokenSource = new ListTokenSource(tokens);
var codeTokenStream = new CommonTokenStream(codeTokenSource);
CSharpParser parser = new CSharpParser(codeTokenStream);
////Create the token stream
//CommonTokenStream tokens = new CommonTokenStream(lexer);
//CSharpParser parser = new CSharpParser(tokens);
IParseTree tree = parser.compilation_unit();
////Walk the tree
ParseTreeWalker walker = new ParseTreeWalker();
walker.Walk(new ProgressPrinter(), tree);
}
}
catch (Exception e) {
Console.WriteLine("Error (Program.cs): " + e);
}
}
/// <summary>
/// Visit a parse tree produced by <see cref="CSharpPreprocessorParser.preprocessor_directive"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitPreprocessor_directive([NotNull] CSharpPreprocessorParser.Preprocessor_directiveContext context)
{
return(VisitChildren(context));
}
