public static Expression Create(Token token)
{
switch (token.Type)
{
case Tokens.SYMBOL: return new SymbolExpression(token);
case Tokens.INT: return new IntExpression(token);
case Tokens.STRING: return new StringExpression(token);
default: return new Expression(token);
}
}
public Expression(Token token)
{
Token = token;
Elements = new List<Expression>();
}
public StringExpression(Token t)
: base(t)
{
Value = Token.Text.Substring(1, Token.Text.Length - 2);
}
public SymbolExpression(Token token)
: base(token)
{
Value = token.Text;
}
public IntExpression(Token t)
: base(t)
{
Value = Int32.Parse(Token.Text);
}