On Sun, Jul 3, 2022 at 1:37 PM Maxime FRYSOU <maxproc...@gmail.com> wrote:
>
> I stumble upon this topic that is very interesting but I'm not 100% sure to
> fully understand what you meant when you said:
> "Checking for a struct field, embedded or not, can only be done using
> reflection.
> You can use a (much faster) type assertion to check for a method."
>
> I know it's been a while, but could you provide a piece of code to illustrate
> a bit just for clarity?
For example, you can test whether a type has a method "String()
string" by writing
_, hasStringMethod := v.(interface { String() string })
Ian
> On Thursday, 4 February 2016 at 23:41:40 UTC+1 Ian Lance Taylor wrote:
>>
>> On Thu, Feb 4, 2016 at 2:39 PM, Nuri Kevenoglu <keve...@gmail.com> wrote:
>> >
>> > Is there a way to check whether a type contains a property by name and type
>> > without reflection e.g. contains property "id" (int64) or is reflection the
>> > only way?
>> >
>> > What about checking for the existence of an embedded type?
>>
>> Checking for a struct field, embedded or not, can only be done using
>> reflection.
>>
>> You can use a (much faster) type assertion to check for a method.
>>
>> Ian
>
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