public LangElement Parse(
ITokenProvider <SemanticValueType, Span> lexer,
INodesFactory <LangElement, Span> astFactory,
LanguageFeatures language,
IErrorSink <Span> errors = null,
IErrorRecovery errorRecovery = null,
int positionShift = 0)
{
if (lexer == null)
{
throw new ArgumentNullException(nameof(lexer));
}
if (astFactory == null)
{
throw new ArgumentNullException(nameof(astFactory));
}
// initialization:
_languageFeatures = language;
if (errorRecovery != null)
{
_lexer = new BufferedLexer(new CompliantLexer(lexer));
}
else
{
_lexer = new CompliantLexer(lexer);
}
_astFactory = astFactory;
_errors = errors ?? new EmptyErrorSink <Span>();
_errorRecovery = errorRecovery ?? new EmptyErrorRecovery();
//InitializeFields();
_currentScope = new Scope(0);
base.Scanner = _lexer;
bool accept = base.Parse();
LangElement result = _astRoot;
// clean and let GC collect unused AST and other stuff:
//ClearFields();
return(result);
}
public LangElement Parse(
ITokenProvider <SemanticValueType, Span> lexer,
INodesFactory <LangElement, Span> astFactory,
LanguageFeatures language,
IErrorSink <Span> errors = null,
IErrorRecovery errorRecovery = null,
int positionShift = 0)
{
if (lexer == null)
{
throw new ArgumentNullException(nameof(lexer));
}
// initialization:
_languageFeatures = language;
_lexer = new CompliantLexer(lexer, language);
_astFactory = astFactory ?? throw new ArgumentNullException(nameof(astFactory));
_errors = errors ?? new EmptyErrorSink <Span>();
if (errorRecovery != null)
{
_lexer = new BufferedLexer(_lexer);
_errorRecovery = errorRecovery;
}
else
{
_errorRecovery = EmptyErrorRecovery.Instance;
}
//InitializeFields();
_currentScope = new Scope(0);
base.Scanner = _lexer;
bool accept = base.Parse();
//
return(_astRoot);
}
/// <summary>
/// Construct a new parser state based on its current state.
/// </summary>
/// <param name="state">Current parser state.</param>
/// <param name="expectedTokens">Expected tokens.</param>
/// <param name="previousToken">Previous token.</param>
/// <param name="currentToken">Current token.</param>
/// <param name="provider">Currently used lexer.</param>
public LexerState(int state, Dictionary <int, int> expectedTokens, CompleteToken previousToken, CompleteToken currentToken, IParserTokenProvider <SemanticValueType, Span> provider)
{
CurrentState = state;
_buffer = new List <CompleteToken>()
{
currentToken
};
_expectedTokens = expectedTokens;
_provider = provider;
_previousToken = previousToken;
}
public BufferedLexer(IParserTokenProvider <SemanticValueType, Span> provider)
{
_provider = provider;
}