_ prefix hides struct field

[andig]

I've just noticed, that I can unmarshal into this:

		URI_    string `mapstructure:"uri"`   // TODO deprecated
		Token_  string `mapstructure:"token"` // TODO deprecated

but not into this:

		_URI    string `mapstructure:"uri"`   // TODO deprecated
		_Token  string `mapstructure:"token"` // TODO deprecated

The latter gives:

'' has invalid keys: token, uri

Not sure if this is intentional?

[andig]

Here's a reproducer: https://go.dev/play/p/BlrOJo2P8f2

[andig]

@sagikazarmark do you have any idea why this is? Could attempt a PR then.

[sagikazarmark]

This is not something a PR can fix. The definition of an exported variable is that it starts with an uppercase letter AFAIK. So this constitutes an unexported variable that reflection won't see in the struct.

[andig]

Oh, sorry- I was assuming _Uppercase would match, but it doesn't: https://go.dev/ref/spec#Exported_identifiers