/// <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;
});
}
});
});
}
