internal bool FindCast(SmallType pFromType, SmallType pToType, out MethodDefinition pDefinition)
{
pDefinition = default;
var name = GetMethodName(null, CAST_METHOD);
if (_methods.ContainsKey(name))
{
bool found = false;
foreach (var md in _methods[name])
{
if (pFromType == md.ArgumentTypes[0] && md.ReturnType == pFromType)
{
pDefinition = md;
return(true);
}
if (pFromType.IsAssignableFrom(md.ArgumentTypes[0]) && md.ReturnType == pToType)
{
pDefinition = md;
found = true;
}
}
return(found);
}
return(false);
}
internal static SmallType GetResultType(SmallType pLeft, BinaryExpressionOperator pOp, SmallType pRight)
{
switch (pOp)
{
case BinaryExpressionOperator.Addition:
case BinaryExpressionOperator.Subtraction:
case BinaryExpressionOperator.Multiplication:
case BinaryExpressionOperator.Division:
case BinaryExpressionOperator.Mod:
if (pLeft.IsAssignableFrom(pRight))
{
return(pLeft);
}
if (TypeHelper.IsFloat(pLeft) && TypeHelper.IsNumber(pRight))
{
return(pLeft);
}
if (TypeHelper.IsFloat(pRight) && TypeHelper.IsNumber(pLeft))
{
return(pRight);
}
return(SmallTypeCache.Undefined);
case BinaryExpressionOperator.Equals:
case BinaryExpressionOperator.GreaterThan:
case BinaryExpressionOperator.GreaterThanOrEqual:
case BinaryExpressionOperator.LessThan:
case BinaryExpressionOperator.LessThanOrEqual:
case BinaryExpressionOperator.NotEquals:
if (pLeft.IsAssignableFrom(pRight))
{
return(pLeft);
}
return(SmallTypeCache.Undefined);
default:
throw new NotSupportedException("Unknown binary expression operator " + pOp.ToString());
}
}
private bool CanCast(SmallType pFrom, SmallType pTo)
{
//Undefined types are caused by non-existent types
//These errors will be caught when the type is first encountered
return(pTo.IsAssignableFrom(pFrom));
}
