private static ComparisonType GetComparingToken(List <Token> tokens)
{
TokenType ttype = (tokens.Where(x => TokenGroups.IsComparingSign(x.GetTokenType())).First()).GetTokenType();
switch (ttype)
{
case TokenType.Equals:
return(ComparisonType.Equals);
case TokenType.NotEquals:
return(ComparisonType.NotEquals);
case TokenType.Bigger:
return(ComparisonType.Bigger);
case TokenType.BiggerOrEquals:
return(ComparisonType.BiggerOrEquals);
case TokenType.Smaller:
return(ComparisonType.Smaller);
case TokenType.SmallerOrEquals:
return(ComparisonType.SmallerOrEquals);
}
return(ComparisonType.Equals);
}
private static IBoolable BuildComparison(List <Token> tokens)
{
int index = tokens.TakeWhile(x => !TokenGroups.IsComparingSign(x.GetTokenType())).Count();
if (index == 0 || index == tokens.Count - 1)
{
return(null);
}
ComparisonType type = GetComparingToken(tokens);
List <Token> leftTokens = tokens.GetRange(0, index);
List <Token> rightTokens = tokens.GetRange(index + 1, tokens.Count - index - 1);
IListable leftL = ListableBuilder.Build(leftTokens);
IListable rightL = ListableBuilder.Build(rightTokens);
if (leftL.IsNull() || rightL.IsNull())
{
return(null);
}
if (leftL is INumerable && rightL is INumerable)
{
return(new NumericComparison(leftL as INumerable, rightL as INumerable, type));
}
if (leftL is ITimeable && rightL is ITimeable)
{
return(new TimeComparison(leftL as ITimeable, rightL as ITimeable, type));
}
if (leftL is IStringable && rightL is IStringable)
{
return(new Uroboros.syntax.expressions.bools.comparisons.StringComparison(leftL as IStringable, rightL as IStringable, type));
}
if (leftL is IListable && rightL is IListable)
{
return(new ListComparison(leftL as IListable, rightL as IListable, type));
}
return(null);
}
private static bool ContainsOneComparingToken(List <Token> tokens)
{
return(tokens.Where(x => TokenGroups.IsComparingSign(x.GetTokenType())).Count() == 1);
}
private static bool ContainsComparingTokens(List <Token> tokens)
{
return(tokens.Where(x => TokenGroups.IsComparingSign(x.GetTokenType())).Any());
}
