public override LuaStatement Parse(INextAwareEnumerator<Token> reader, IParserContext context)
{
var token = reader.GetAndMoveNext();
if (string.IsNullOrWhiteSpace(token.Value) || token.Value == LuaToken.Semicolon)
return new EmptyStatement();
throw new UnexpectedTokenException(token);
}
public override LuaStatement Parse(INextAwareEnumerator<Token> reader, IParserContext context)
{
reader.VerifyExpectedTokenAndMoveNext(Keywords.Function);
if (reader.Next.Value == LuaToken.Colon)
{
reader.MoveNext();
reader.MoveNext();
}
var functionName = reader.GetAndMoveNext();
reader.VerifyExpectedToken(LuaToken.LeftBracket);
var argumentNames = new List<string>();
reader.MoveNext();
while (reader.Current.Value != LuaToken.RightBracket)
{
argumentNames.Add(reader.Current.Value);
reader.MoveNext();
reader.VerifyExpectedToken(LuaToken.Comma, LuaToken.RightBracket);
if (reader.Current.Value == LuaToken.RightBracket)
break;
reader.MoveNext();
}
reader.VerifyExpectedTokenAndMoveNext(LuaToken.RightBracket);
var statementsParser = new StatementBlockParser(Keywords.End);
var body = statementsParser.ParseBlock(reader, context);
return new FunctionDeclarationStatement(functionName.Value,argumentNames,body);
}
public LuaStatement Parse(INextAwareEnumerator <Token> reader, IParserContext context)
{
reader.VerifyExpectedTokenAndMoveNext(Keywords.Function);
if (reader.Next.Value == LuaToken.Colon)
{
reader.MoveNext();
reader.MoveNext();
}
var functionName = reader.GetAndMoveNext();
reader.VerifyExpectedToken(LuaToken.LeftBracket);
var argumentNames = new List <string>();
reader.MoveNext();
while (reader.Current.Value != LuaToken.RightBracket)
{
argumentNames.Add(reader.Current.Value);
reader.MoveNext();
reader.VerifyExpectedToken(LuaToken.Comma, LuaToken.RightBracket);
if (reader.Current.Value == LuaToken.RightBracket)
{
break;
}
reader.MoveNext();
}
reader.VerifyExpectedTokenAndMoveNext(LuaToken.RightBracket);
var statementsParser = new StatementBlockParser(Keywords.End);
var body = statementsParser.ParseBlock(reader, context);
return(new FunctionDeclarationStatement(functionName.Value, argumentNames, body));
}
public LuaStatement Parse(INextAwareEnumerator <Token> reader, IParserContext context)
{
var token = reader.GetAndMoveNext();
if (string.IsNullOrWhiteSpace(token.Value) || token.Value == LuaToken.Semicolon)
{
return(new EmptyStatement());
}
throw new UnexpectedTokenException(token);
}
public override LuaExpression Parse(INextAwareEnumerator<Token> reader, IParserContext context)
{
reader.VerifyExpectedTokenAndMoveNext(LuaToken.DoubleQuote, LuaToken.DoubleLeftSquareBracket);
var builder = new StringBuilder();
while (reader.HasNext && reader.Current.Value != LuaToken.DoubleQuote &&
reader.Current.Value != LuaToken.DoubleRightSquareBracket)
builder.Append(reader.GetAndMoveNext());
reader.VerifyExpectedTokenAndMoveNext(LuaToken.DoubleQuote, LuaToken.DoubleRightSquareBracket);
return new StringConstantExpression(builder.ToString());
}
public static LuaExpression ReadExpression(INextAwareEnumerator <Token> reader, IParserContext context)
{
var expressionParser = ExpressionParserDiscriminator.Identify(reader, context);
var expression = expressionParser.Parse(reader, context);
if (LuaToken.IsBinaryOperation(reader.Current.Value))
{
var operation = reader.GetAndMoveNext();
var rightSideExpression = ReadExpression(reader, context);
expression = new BinaryExpression(expression, rightSideExpression, operation.Value);
}
return(expression);
}
public static LuaExpression ReadExpression(INextAwareEnumerator<Token> reader, IParserContext context)
{
var expressionDiscriminator = new ExpressionParserDiscriminator();
var expressionParser = expressionDiscriminator.Identify(reader);
var expression = expressionParser.Parse(reader, context);
if (LuaToken.IsBinaryOperation(reader.Current.Value))
{
var operation = reader.GetAndMoveNext();
var rightSideExpression = ReadExpression(reader,context);
expression = new BinaryExpression(expression,rightSideExpression,operation.Value);
}
return expression;
}
public override LuaStatement Parse(INextAwareEnumerator<Token> reader, IParserContext context)
{
reader.VerifyExpectedTokenAndMoveNext(Keywords.For);
var scope = context.AcquireScope();
reader.VerifyIsIdentifier();
var forVariableName = reader.GetAndMoveNext();
reader.VerifyExpectedTokenAndMoveNext(LuaToken.EqualsSign);
var conditionsParser = new ExpressionListParser();
var conditions = conditionsParser.Parse(reader, context).ToList();
reader.VerifyExpectedTokenAndMoveNext(Keywords.Do);
var statementsParser = new StatementBlockParser(Keywords.End);
var bodyBlock = statementsParser.ParseBlock(reader, context);
context.ReleaseScope(scope);
return new ForStatement(conditions,bodyBlock);
}
public LuaStatement Parse(INextAwareEnumerator <Token> reader, IParserContext context)
{
reader.VerifyExpectedTokenAndMoveNext(Keywords.For);
var scope = context.AcquireScope();
reader.VerifyIsIdentifier();
var forVariableName = reader.GetAndMoveNext();
reader.VerifyExpectedTokenAndMoveNext(LuaToken.EqualsSign);
var conditionsParser = new ExpressionListParser();
var conditions = conditionsParser.Parse(reader, context).ToList();
reader.VerifyExpectedTokenAndMoveNext(Keywords.Do);
var statementsParser = new StatementBlockParser(Keywords.End);
var bodyBlock = statementsParser.ParseBlock(reader, context);
context.ReleaseScope(scope);
return(new ForStatement(conditions, bodyBlock));
}
public LuaExpression Parse(INextAwareEnumerator <Token> reader, IParserContext context)
{
return(new StringConstantExpression(reader.GetAndMoveNext().Value));
}
