static void Try(string input)
{
if (show_input)
{
System.Console.WriteLine("Input:");
System.Console.WriteLine(input);
}
var str = new AntlrInputStream(input);
var lexer = new ANTLRv3Lexer(str);
var tokens = new CommonTokenStream(lexer);
var parser = new ANTLRv3Parser(tokens);
var listener = new ErrorListener <IToken>(parser, lexer, tokens);
parser.AddErrorListener(listener);
lexer.AddErrorListener(new ErrorListener <int>(parser, lexer, tokens));
var tree = parser.grammarDef();
if (listener.had_error)
{
System.Console.WriteLine("error in parse.");
}
else
{
System.Console.WriteLine("parse completed.");
}
if (show_tokens)
{
System.Console.WriteLine(tokens.OutputTokens(lexer));
}
if (show_tree)
{
System.Console.WriteLine(tree.OutputTree(tokens));
}
}
public void Try(string ffn, string input, ref Dictionary <string, string> results)
{
var now = DateTime.Now.ToString();
var errors = new StringBuilder();
var str = new AntlrInputStream(input);
var lexer = new ANTLRv3Lexer(str);
var tokens = new CommonTokenStream(lexer);
var parser = new ANTLRv3Parser(tokens);
var elistener = new ErrorListener <IToken>(parser, lexer, 0);
parser.AddErrorListener(elistener);
var tree = parser.grammarDef();
var error_file_name = ffn;
error_file_name = error_file_name.EndsWith(".g3")
? (error_file_name.Substring(0, error_file_name.Length - 3) + ".txt") : error_file_name;
error_file_name = error_file_name.EndsWith(".g")
? (error_file_name.Substring(0, error_file_name.Length - 2) + ".txt") : error_file_name;
var new_ffn = ffn;
new_ffn = new_ffn.EndsWith(".g3")
? (new_ffn.Substring(0, new_ffn.Length - 3) + ".g4") : new_ffn;
new_ffn = new_ffn.EndsWith(".g")
? (new_ffn.Substring(0, new_ffn.Length - 2) + ".g4") : new_ffn;
if (elistener.had_error)
{
results.Add(error_file_name, errors.ToString());
return;
}
else
{
errors.AppendLine("File " + ffn + " parsed successfully.");
errors.AppendLine("Date: " + now);
}
// Transforms derived from two sources:
// https://github.com/senseidb/sensei/pull/23
var(text_before, other) = TreeEdits.TextToLeftOfLeaves(tokens, tree);
// Remove unused options at top of grammar def.
// This specifically looks at the options at the top of the file,
// not rule-based options. That will be handled separately below.
using (AntlrTreeEditing.AntlrDOM.AntlrDynamicContext dynamicContext =
new AntlrTreeEditing.AntlrDOM.ConvertToDOM().Try(tree, parser))
{
org.eclipse.wst.xml.xpath2.processor.Engine engine =
new org.eclipse.wst.xml.xpath2.processor.Engine();
// Allow language, tokenVocab, TokenLabelType, superClass
var nodes = engine.parseExpression(
@"//grammarDef/optionsSpec
/option
[id
/(TOKEN_REF | RULE_REF)
[text() = 'output'
or text() = 'backtrack'
or text() = 'memoize'
or text() = 'ASTLabelType'
or text() = 'rewrite'
]]",
new StaticContextBuilder()).evaluate(
dynamicContext, new object[] { dynamicContext.Document })
.Select(x => (x.NativeValue as AntlrTreeEditing.AntlrDOM.AntlrElement).AntlrIParseTree);
TreeEdits.Delete(nodes);
var options = engine.parseExpression(
@"//grammarDef/optionsSpec",
new StaticContextBuilder()).evaluate(
dynamicContext, new object[] { dynamicContext.Document })
.Select(x => (x.NativeValue as AntlrTreeEditing.AntlrDOM.AntlrElement).AntlrIParseTree);
foreach (var os in options)
{
if (os.ChildCount == 3)
{
TreeEdits.Delete(os);
}
}
}
// Fix options in the beginning of rules.
// See https://theantlrguy.atlassian.net/wiki/spaces/ANTLR3/pages/2687029/Rule+and+subrule+options
using (AntlrTreeEditing.AntlrDOM.AntlrDynamicContext dynamicContext =
new AntlrTreeEditing.AntlrDOM.ConvertToDOM().Try(tree, parser))
{
org.eclipse.wst.xml.xpath2.processor.Engine engine =
new org.eclipse.wst.xml.xpath2.processor.Engine();
// Allow language, tokenVocab, TokenLabelType, superClass
var nodes = engine.parseExpression(
@"//rule_/optionsSpec
/option
[id
/(TOKEN_REF | RULE_REF)
[text() = 'output'
or text() = 'backtrack'
or text() = 'memoize'
or text() = 'ASTLabelType'
or text() = 'rewrite'
]]",
new StaticContextBuilder()).evaluate(
dynamicContext, new object[] { dynamicContext.Document })
.Select(x => (x.NativeValue as AntlrTreeEditing.AntlrDOM.AntlrElement).AntlrIParseTree);
TreeEdits.Delete(nodes);
var options = engine.parseExpression(
@"//rule_/optionsSpec",
new StaticContextBuilder()).evaluate(
dynamicContext, new object[] { dynamicContext.Document })
.Select(x => (x.NativeValue as AntlrTreeEditing.AntlrDOM.AntlrElement).AntlrIParseTree);
foreach (var os in options)
{
if (os.ChildCount == 3)
{
TreeEdits.Delete(os);
}
}
}
// Use new tokens{} syntax
using (AntlrTreeEditing.AntlrDOM.AntlrDynamicContext dynamicContext =
new AntlrTreeEditing.AntlrDOM.ConvertToDOM().Try(tree, parser))
{
org.eclipse.wst.xml.xpath2.processor.Engine engine =
new org.eclipse.wst.xml.xpath2.processor.Engine();
var nodes = engine.parseExpression(
@"//tokensSpec
/tokenSpec
/SEMI",
new StaticContextBuilder()).evaluate(
dynamicContext, new object[] { dynamicContext.Document })
.Select(x => (x.NativeValue as AntlrTreeEditing.AntlrDOM.AntlrElement).AntlrIParseTree);
if (nodes.Any())
{
// Delete tha last ";" in tokens list--change in syntax.
var last = nodes.Last();
TreeEdits.Delete(last);
// Replace all remaining ";" with ",".
TreeEdits.Replace(tree, (in IParseTree n, out bool c) =>
{
c = true;
if (!nodes.Contains(n) && n != last)
{
return(null);
}
var t = n as TerminalNodeImpl;
var new_sym = new TerminalNodeImpl(new CommonToken(ANTLRv4Lexer.COMMA)
{
Line = -1, Column = -1, Text = ","
});
text_before.TryGetValue(t, out string v);
if (v != null)
{
text_before.Add(new_sym, v);
}
return(new_sym);
});