public SourceUnitTree Parse(SourceUnit /*!*/ sourceUnit, RubyCompilerOptions /*!*/ options, ErrorSink /*!*/ errorSink)
{
Assert.NotNull(sourceUnit, options, errorSink);
ErrorCounter counter = new ErrorCounter(errorSink);
_tokenizer.ErrorSink = counter;
_tokenizer.Compatibility = options.Compatibility;
_lexicalScopes.Clear();
EnterScope(CreateTopScope(options.LocalNames));
using (SourceCodeReader reader = sourceUnit.GetReader()) {
_sourceUnit = sourceUnit;
_tokenizer.Initialize(null, reader, sourceUnit, options.InitialLocation);
// default encoding when hosted:
_encoding = reader.Encoding ?? RubyEncoding.GetDefaultHostEncoding(options.Compatibility);
try {
Parse();
LeaveScope();
} catch (InternalSyntaxError) {
_ast = null;
_lexicalScopes.Clear();
} finally {
ScriptCodeParseResult props;
if (counter.AnyError)
{
_ast = null;
if (_tokenizer.UnterminatedToken)
{
props = ScriptCodeParseResult.IncompleteToken;
}
else if (_tokenizer.IsEndOfFile)
{
props = ScriptCodeParseResult.IncompleteStatement;
}
else
{
props = ScriptCodeParseResult.Invalid;
}
}
else
{
props = ScriptCodeParseResult.Complete;
}
sourceUnit.CodeProperties = props;
}
return(_ast);
}
}
