/// <summary>
/// 整数と小数の比較
/// </summary>
private DynamicMetaObject TryCalcOnDefferentNumericType(DynamicMetaObject left, DynamicMetaObject right)
{
Expression leftExpr = BinderHelper.LimitTypeConvert(left);
Expression rightExpr = BinderHelper.LimitTypeConvert(right);
Expression expr = null;
foreach (var pattern in BinderHelper.CastPatterns)
{
if (leftExpr.Type == pattern.Narrow && rightExpr.Type == pattern.Wide)
{
var upperLeft = Expression.Convert(leftExpr, pattern.Wide);
expr = Expression.MakeBinary(this.Operation, upperLeft, rightExpr);
break;
}
if (leftExpr.Type == pattern.Wide && rightExpr.Type == pattern.Narrow)
{
var upperRight = Expression.Convert(rightExpr, pattern.Wide);
expr = Expression.MakeBinary(this.Operation, leftExpr, upperRight);
break;
}
}
if (expr == null)
{
return(null);
}
return(new DynamicMetaObject(
BinderHelper.Wrap(expr, this.ReturnType),
BinderHelper.GetTypeRestriction(left, right)));
}
/// <summary>
/// 整数と小数の演算を行う
/// </summary>
private DynamicMetaObject TryCalcNumeric(DynamicMetaObject left, DynamicMetaObject right)
{
Expression leftExpr = BinderHelper.LimitTypeConvert(left);
Expression rightExpr = BinderHelper.LimitTypeConvert(right);
Expression expr = null;
foreach (var pattern in BinderHelper.CastPatterns)
{
if (leftExpr.Type == pattern.Narrow && rightExpr.Type == pattern.Wide)
{
var upperLeft = Expression.Convert(leftExpr, pattern.Wide);
expr = OverflowCheckingCalc(upperLeft, rightExpr);
break;
}
if (leftExpr.Type == pattern.Wide && rightExpr.Type == pattern.Narrow)
{
var upperRight = Expression.Convert(rightExpr, pattern.Wide);
expr = OverflowCheckingCalc(leftExpr, upperRight);
break;
}
}
if (expr == null)
{
return(null);
}
var bindings = BinderHelper.GetTypeRestriction(left, right);
return(new DynamicMetaObject(expr, bindings));
}