public Regex Parse(string regularExpression)
{
var grammar = new RegexGrammar();
var parseEngine = new ParseEngine(grammar, new ParseEngineOptions(optimizeRightRecursion: true));
var parseRunner = new ParseRunner(parseEngine, regularExpression);
while (!parseRunner.EndOfStream())
{
if (!parseRunner.Read())
throw new Exception(
$"Unable to parse regular expression. Error at position {parseRunner.Position}.");
}
if (!parseEngine.IsAccepted())
throw new Exception(
$"Error parsing regular expression. Error at position {parseRunner.Position}");
var parseForest = parseEngine.GetParseForestRootNode();
var parseTree = new InternalTreeNode(
parseForest as IInternalForestNode,
new SelectFirstChildDisambiguationAlgorithm());
var regexVisitor = new RegexVisitor();
parseTree.Accept(regexVisitor);
return regexVisitor.Regex;
}
#pragma warning disable CC0091 // Use static method
public EbnfDefinition Parse(string ebnf)
{
var grammar = new EbnfGrammar();
var parseEngine = new ParseEngine(grammar, new ParseEngineOptions(optimizeRightRecursion: true));
var parseRunner = new ParseRunner(parseEngine, ebnf);
while (!parseRunner.EndOfStream())
{
if (!parseRunner.Read())
throw new Exception(
$"Unable to parse Ebnf. Error at position {parseRunner.Position}.");
}
if (!parseEngine.IsAccepted())
throw new Exception(
$"Unable to parse Ebnf. Error at position {parseRunner.Position}");
var parseForest = parseEngine.GetParseForestRootNode();
var parseTree = new InternalTreeNode(
parseForest as IInternalForestNode,
new SelectFirstChildDisambiguationAlgorithm());
var ebnfVisitor = new EbnfVisitor();
parseTree.Accept(ebnfVisitor);
return ebnfVisitor.Definition;
}
public bool Parse()
{
var grammar = new BnfGrammar();
var parseEngine = new ParseEngine(grammar);
var parseRunner = new ParseRunner(parseEngine, sampleBnf);
while (!parseRunner.EndOfStream() && parseRunner.Read()) { }
return parseRunner.ParseEngine.IsAccepted();
}
private void FailParseInput(string input)
{
var parseRunner = new ParseRunner(_parseEngine, input);
Assert.IsFalse(parseRunner.ParseEngine.IsAccepted());
}
private IForestNode ParseInput(string input)
{
var parseRunner = new ParseRunner(_parseEngine, input);
for (int i = 0; i < input.Length; i++)
{
Assert.IsTrue(parseRunner.Read(), $"Error found in position {parseRunner.Position}");
}
Assert.IsTrue(parseRunner.ParseEngine.IsAccepted());
return parseRunner.ParseEngine.GetParseForestRootNode();
}