public void RunParser(String input)
{
// String example="write(\"CMMM语言while循环示例:\");int a = 10;while (a <> 0) {a = a - 1;write(a);}";
// input = example;
ICharStream stream = CharStreams.fromstring(input);
ITokenSource lexer = new CMMLexer(stream);
ITokenStream tokens = new CommonTokenStream(lexer);
CMMParser parser = new CMMParser(tokens);
parser.BuildParseTree = true;
IParseTree tree = parser.statements();
var visitor = new RefPhase();
visitor.outputStream = this;
visitor.Visit(tree);
}
public void StaticError(String input)
{
try {
ICharStream stream = CharStreams.fromstring(input);
ITokenSource lexer = new ExceptionLexer(stream, outputStream, error);
ITokenStream tokens = new CommonTokenStream(lexer);
CMMParser parser = new CMMParser(tokens);
parser.BuildParseTree = true;
parser.RemoveErrorListeners();
CMMErrorListener errorListener = new CMMErrorListener();
errorListener.outputStream = outputStream;
errorListener.errorShow = error;
parser.AddErrorListener(errorListener);
CMMErrorStrategy errorStrategy = new CMMErrorStrategy();
parser.ErrorHandler = errorStrategy;
parser.statements();
}
catch (Exception e1) {
outputStream?.Print(e1.Message);
}
}
/// <summary>
/// 准备生成代码
/// </summary>
private IParseTree prepareForCodeGen()
{
errorPanel.Errors = null;
textEditor.Errors = null;
String input = textEditor.Text;
if (String.IsNullOrEmpty(input))
{
return(null);
}
var listener = new CMMErrorListener();
ICharStream stream = CharStreams.fromstring(input);
ITokenSource lexer = new ExceptionLexer(stream, listener);
ITokenStream tokens = new CommonTokenStream(lexer);
CMMParser parser = new CMMParser(tokens);
parser.RemoveErrorListeners();
parser.AddErrorListener(listener);
parser.ErrorHandler = new CMMErrorStrategy();
parser.BuildParseTree = true;
IParseTree tree = parser.statements();
//如果出错，转到错误面板并返回null
if (listener.errors.Count != 0)
{
handleCompileTimeError(listener.errors);
return(null);
}
var graph = new ParseTreeGrapher().CreateGraph(tree, CMMParser.ruleNames);
drawTreePanel.Graph = graph;
return(tree);
}
private void performCheck()
{
Debug.WriteLine("perform check");
Dispatcher.Invoke(() => {
string input = textEditor.Text;
if (string.IsNullOrEmpty(input))
{
return;
}
errorPanel.Errors = null;
textEditor.Errors = null;
Task.Run(() => {
var listener = new CMMErrorListener();
ICharStream stream = CharStreams.fromstring(input);
ITokenSource lexer = new ExceptionLexer(stream, listener);
ITokenStream tokens = new CommonTokenStream(lexer);
CMMParser parser = new CMMParser(tokens);
parser.RemoveErrorListeners();
parser.AddErrorListener(listener);
parser.ErrorHandler = new CMMErrorStrategy();
parser.BuildParseTree = true;
IParseTree tree = parser.statements();
if (listener.errors.Count != 0)
{
Dispatcher.Invoke(() => {
errorPanel.Errors = listener.errors;
textEditor.Errors = listener.errors;
});
}
});
});
}
