There would be no advantage to that - all features are either available, or
not available, depending on which version you use. There is no "go 1.16
without `embed`". It also needs to be set in `go.mod`, because you might
compile modules written for different go versions into one binary - so
which language version to use is part of the module description.
So, no. Putting a language version into `go.mod` seems to be exactly the
right way to do this.

On Tue, Mar 2, 2021 at 12:21 PM tapi...@gmail.com <tapir....@gmail.com>
wrote:

> BTW, I think the embedding functionality introduced in Go 1.16 should not
> be viewed as a feature.
> It should be viewed as an API change instead.
>

I don't understand what you mean by this. There is no intrinsic difference
between the two. In this particular case, the `embed` package adds an API
to support a new feature "embedding static files in go binaries".


> Now Go projects using embedding and setting go directive verison as v1.15
> in go.mod fail to compile with Go toolchain 1.16.
>

They shouldn't do that. If they use `embed`, they require at least go 1.16,
so they set that.
I can't reproduce your claim that setting `go 1.15` and using embed will
fail to compile with a Go 1.16 toolchain. It works fine for me.

IMO, this is unnecessary, for the "//go:embed" directive always requires
> importing the "embed" package.
>
> On Tuesday, March 2, 2021 at 6:14:23 AM UTC-5 tapi...@gmail.com wrote:
>
>> Would be better to use compile flags to control each language features
>> individually?
>>
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