static void Try(string input)
{
if (show_input)
{
System.Console.WriteLine("Input:");
System.Console.WriteLine(input);
}
var str = new AntlrInputStream(input);
var lexer = new ANTLRv2Lexer(str);
var tokens = new CommonTokenStream(lexer);
var parser = new ANTLRv2Parser(tokens);
var listener = new ErrorListener <IToken>(parser, lexer, tokens);
parser.AddErrorListener(listener);
lexer.AddErrorListener(new ErrorListener <int>(parser, lexer, tokens));
var tree = parser.grammar_();
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 ANTLRv2Lexer(str);
var tokens = new CommonTokenStream(lexer);
var parser = new ANTLRv2Parser(tokens);
var elistener = new ErrorListener <IToken>(parser, lexer, 0);
parser.AddErrorListener(elistener);
var tree = parser.grammar_();
var error_file_name = ffn;
error_file_name = error_file_name.EndsWith(".g2")
? (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(".g2")
? (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 "header".
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(
@"//header_",
new StaticContextBuilder()).evaluate(
dynamicContext, new object[] { dynamicContext.Document })
.Select(x => (x.NativeValue as AntlrTreeEditing.AntlrDOM.AntlrElement).AntlrIParseTree);
foreach (var n in nodes)
{
TreeEdits.Delete(n);
}
}
// Remove classDef action blocks for now.
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(
@"//classDef/actionBlock",
new StaticContextBuilder()).evaluate(
dynamicContext, new object[] { dynamicContext.Document })
.Select(x => (x.NativeValue as AntlrTreeEditing.AntlrDOM.AntlrElement).AntlrIParseTree);
foreach (var n in nodes)
{
TreeEdits.Delete(n);
}
}
// Let's take care of options first. That's because we can't
// determine if this is a combined grammar or not.
// 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();
var options = engine.parseExpression(
@"//(fileOptionsSpec | parserOptionsSpec | lexerOptionsSpec | treeOptionsSpec)",
new StaticContextBuilder()).evaluate(
dynamicContext, new object[] { dynamicContext.Document })
.Select(x => (x.NativeValue as AntlrTreeEditing.AntlrDOM.AntlrElement).AntlrIParseTree).ToList();
var nodes = engine.parseExpression(
@"//(fileOptionsSpec | parserOptionsSpec | lexerOptionsSpec | treeParserOptionsSpec)
/(option | lexerOption)
[id/*
[
text() = 'output'
or text() = 'backtrack'
or text() = 'buildAST'
or text() = 'classHeaderSuffix'
or text() = 'memoize'
or text() = 'ASTLabelType'
or text() = 'rewrite'
or text() = 'k'
or text() = 'exportVocab'
or text() = 'testLiterals'
or text() = 'interactive'
or text() = 'charVocabulary'
or text() = 'defaultErrorHandler'
]]",
new StaticContextBuilder()).evaluate(
dynamicContext, new object[] { dynamicContext.Document })
.Select(x => (x.NativeValue as AntlrTreeEditing.AntlrDOM.AntlrElement).AntlrIParseTree);
TreeEdits.Delete(nodes);
foreach (var opt in options)
{
if (opt.ChildCount == 3)
{
TreeEdits.Delete(opt);
}
}
}
// Delete rule 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();
var nodes = engine.parseExpression(
@"//rule_/ruleOptionsSpec
/option
[id
/(TOKEN_REF | RULE_REF)
[text() = 'output'
or text() = 'backtrack'
or text() = 'memoize'
or text() = 'ASTLabelType'
or text() = 'rewrite'
or text() = 'k'
or text() = 'exportVocab'
or text() = 'testLiterals'
or text() = 'interactive'
or text() = 'charVocabulary'
or text() = 'defaultErrorHandler'
]]",
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_/ruleOptionsSpec",
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);
}
}
}
// Parser and Lexer in One Definition
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 parser_nodes = engine.parseExpression(
@"//parserSpec",
new StaticContextBuilder()).evaluate(
dynamicContext, new object[] { dynamicContext.Document })
.Select(x => (x.NativeValue as AntlrTreeEditing.AntlrDOM.AntlrElement).AntlrIParseTree);
var lexer_nodes = engine.parseExpression(
@"//lexerSpec",
new StaticContextBuilder()).evaluate(
dynamicContext, new object[] { dynamicContext.Document })
.Select(x => (x.NativeValue as AntlrTreeEditing.AntlrDOM.AntlrElement).AntlrIParseTree);
var tree_nodes = engine.parseExpression(
@"//treeParserSpec",
new StaticContextBuilder()).evaluate(
dynamicContext, new object[] { dynamicContext.Document })
.Select(x => (x.NativeValue as AntlrTreeEditing.AntlrDOM.AntlrElement).AntlrIParseTree);
// Can this be a "combined" grammar? That can happen only if
// one parser and one lexer decl and no tree decl. Options for
// the lexer must be removed too.
if (parser_nodes.Count() == 1 && lexer_nodes.Count() == 1 && tree_nodes.Count() == 0)
{
var lexerSpec = lexer_nodes.First() as ANTLRv2Parser.LexerSpecContext;
if (lexerSpec.lexerOptionsSpec() == null)
{
// Nuke lexer class decl because it's a combined grammar.
TreeEdits.Delete(lexerSpec);
lexerSpec = null;
}
// Rewrite the parser spec.
var parserSpec = parser_nodes.First() as ANTLRv2Parser.ParserSpecContext;
var c = parserSpec.CLASS();
var i = parserSpec.id();
var e = parserSpec.EXTENDS();
var p = parserSpec.PARSER();
var s = parserSpec.superClass();
var new_sym = new TerminalNodeImpl(new CommonToken(ANTLRv4Lexer.GRAMMAR)
{
Line = -1, Column = -1, Text = "grammar"
});
text_before.TryGetValue(c as TerminalNodeImpl, out string v);
if (v != null)
{
text_before.Add(new_sym, v);
}
TreeEdits.Replace(c, (in IParseTree n, out bool cc) =>
{
cc = false;
return(new_sym);
});