[Mono-list] Embedded API: calling explicit operators

Robert Jordan robertj at gmx.net
Wed Sep 4 23:01:48 UTC 2013

On 31.08.2013 23:16, jonathan at mugginsoft.com wrote:
> How is an explicit operator called using the embedded api?
> For example mscorlib contains a number of explicit operators for NSDecimal:
> http://msdn.microsoft.com/en-us/library/system.decimal.op_explicit.aspx
> Reflection returns the operators as methods which I naively attempt to call like so in Obj-C:
>      - (uint8_t)op_Explicit_withValue:(NSDecimalNumber *)p1
>      {
> 		MonoObject *monoObject = [self invokeMonoMethod:"op_Explicit(decimal)" withNumArgs:1, [p1 monoValue]];
> 		return DB_UNBOX_UINT8(monoObject);
>      }
> However all the operator methods will have the same signature as only the return type differs, so how do I differentiate them?

Assuming that you're using mono_method_desc_search_in_class () for
method look-ups, there is actually no way to specify the return
type. You may want to enumerate the methods yourself using
mono_class_get_methods ().

However, what makes you think that you need these operators in the
first place? :) Decimal implements a full set of ToXyz methods which
are more readable and accessible from unmanaged code. IConvertible
is implemented as well...


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