private static Expression GetIsValidNumericValueCheck(Expression sourceValue, bool isWholeNumberNumeric)
{
var rangeCheck = GetNumericRangeCheck(sourceValue);
if (isWholeNumberNumeric)
{
return(rangeCheck);
}
var isNotWholeNumber = NumericConversions.GetModuloOneIsNotZeroCheck(sourceValue);
return(Expression.OrElse(rangeCheck, isNotWholeNumber));
}
private static Expression GetNumericValueValidityCheck(Expression sourceValue, Type targetType)
{
var nonNullableTargetType = targetType.GetNonNullableType();
var numericValueIsInRange = NumericValueIsInRangeComparison.For(sourceValue, nonNullableTargetType);
if (NonWholeNumberCheckIsNotRequired(sourceValue, nonNullableTargetType))
{
return(numericValueIsInRange);
}
var moduloOneEqualsZero = NumericConversions.GetModuloOneIsZeroCheck(sourceValue);
return(Expression.AndAlso(numericValueIsInRange, moduloOneEqualsZero));
}
private static Expression GetNumericRangeCheck(Expression sourceValue)
{
var nine = NumericConversions.GetConstantValue(9, sourceValue);
var sourceGreaterThanNine = Expression.GreaterThan(sourceValue, nine);
if (sourceValue.Type.IsUnsignedNumeric())
{
return(sourceGreaterThanNine);
}
var minusNine = NumericConversions.GetConstantValue(-9, sourceValue);
var sourceLessThanMinusNine = Expression.LessThan(sourceValue, minusNine);
return(Expression.OrElse(sourceGreaterThanNine, sourceLessThanMinusNine));
}
