| public Evaluate ( TemplateContext context ) : void | ||
| context | TemplateContext | |
| return | void | |
private static bool CompareTo(TemplateContext context, SourceSpan span, ScriptBinaryOperator op, IEnumerable <object> left, IEnumerable <object> right)
{
// Compare the length first
var leftCount = left.Count();
var rightCount = right.Count();
var compare = leftCount.CompareTo(rightCount);
switch (op)
{
case ScriptBinaryOperator.CompareEqual:
if (compare != 0)
{
return(false);
}
break;
case ScriptBinaryOperator.CompareNotEqual:
if (compare != 0)
{
return(true);
}
if (leftCount == 0)
{
return(false);
}
break;
case ScriptBinaryOperator.CompareLessOrEqual:
case ScriptBinaryOperator.CompareLess:
if (compare < 0)
{
return(true);
}
if (compare > 0)
{
return(false);
}
if (leftCount == 0 && op == ScriptBinaryOperator.CompareLess)
{
return(false);
}
break;
case ScriptBinaryOperator.CompareGreaterOrEqual:
case ScriptBinaryOperator.CompareGreater:
if (compare < 0)
{
return(false);
}
if (compare > 0)
{
return(true);
}
if (leftCount == 0 && op == ScriptBinaryOperator.CompareGreater)
{
return(false);
}
break;
default:
throw new ScriptRuntimeException(span, $"The operator `{op.ToText()}` is not supported between {context.GetTypeName(left)} and {context.GetTypeName(right)}.");
}
// Otherwise we need to compare each element
var leftIterator = left.GetEnumerator();
var rightIterator = right.GetEnumerator();
while (leftIterator.MoveNext() && rightIterator.MoveNext())
{
var leftValue = leftIterator.Current;
var rightValue = rightIterator.Current;
var result = (bool)ScriptBinaryExpression.Evaluate(context, span, op, leftValue, rightValue);
if (!result)
{
return(false);
}
}
return(true);
}
