private TypeNode ValueType()
{
TypeNode itsAST;
SourceCodePosition itsPos = _currentToken.SourcePosition;
if (_currentToken.Type == Token.TokenType.Int)
{
itsAST = new IntTypeNode(itsPos);
Accept(Token.TokenType.Int);
}
else if (_currentToken.Type == Token.TokenType.Real)
{
itsAST = new RealTypeNode(itsPos);
Accept(Token.TokenType.Real);
}
else if (_currentToken.Type == Token.TokenType.String)
{
itsAST = new StringTypeNode(itsPos);
Accept(Token.TokenType.String);
}
else
{
itsAST = new BooleanTypeNode(itsPos);
Accept(Token.TokenType.Boolean);
}
return(itsAST);
}
public SumExpressionNode(ExpressionNode leftExpression,
ExpressionNode multExpression, Token token) : base(leftExpression, multExpression, token)
{
var s = new StringTypeNode();
rules[Utils.Char + "," + Utils.String] = s;
rules[Utils.String + "," + Utils.Char] = s;
rules[Utils.String + "," + Utils.String] = s;
rules[Utils.String + "," + Utils.Int] = s;
rules[Utils.Int + "," + Utils.String] = s;
rules[Utils.String + "," + Utils.Float] = s;
rules[Utils.Float + "," + Utils.String] = s;
}
public object Visit(StringTypeNode n, object o)
{
return(null);
}
public object Visit(StringTypeNode n, object o)
{
Append("string");
return(null);
}