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go/types: export Original function (or perhaps method) #17730

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griesemer opened this issue Nov 1, 2016 · 5 comments
Closed

go/types: export Original function (or perhaps method) #17730

griesemer opened this issue Nov 1, 2016 · 5 comments
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@griesemer
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go/types internally defines an original function that returns the original object of an alias, if so, or just the incoming object, otherwise.

This is useful externally, as well, similar to types.Underlying().
@griesemer griesemer added this to the Go1.8Maybe milestone Nov 1, 2016
@griesemer griesemer self-assigned this Nov 1, 2016
@griesemer
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cc: @alandonovan

@alandonovan
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I agree that this would be a useful package-level function. (We cannot add a method to Object because that would break compatibility with user-defined implementations.)

@rsc
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rsc commented Nov 2, 2016

Adding a method to Object is OK, @alandonovan. Object has unexported methods so there are no from-scratch user-defined implementations. At most there are user-defined implementations that embed some implementation provided by the go/types package.

@alandonovan
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Ah, I forgot about that. Good point.

@griesemer
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Decision to back out current alias implementation. See #16339. Closing.

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