[temp.mem.enum] Fix consistency of example with [temp.inst] (editorial) #7558
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The example is inconsistent with [temp.inst] p3, which states the following: "The implicit instantiation of a class template specialization causes - the implicit instantiation of the declarations, but not of the definitions, of [...] scoped member enumerations [...]; and - the implicit instantiation of the definitions of [...] unscoped member enumerations [...]" Hence, the example can be fixed by either (1) omitting the instantiation or (2) by replacing the unscoped with a scoped enumeration. Since the implicit instantiation does not contribute to the point of [temp.mem.enum], the inconsistency can be solved most easily with alternative (1). Note: The example was originally taken from DR1206.
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@thebrandre, if you wish for your real name to appear in the commit history, you need to configure it in github. |
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@jensmaurer Thanks for pointing that out! I just updated my GitHub profile. |
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This is related to CWG1485 |
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The example is inconsistent with [temp.inst] p3, which states the following:
Hence, the example can be fixed by either (1) omitting the instantiation or (2) by replacing the unscoped with a scoped enumeration. Since the implicit instantiation does not contribute to the point of [temp.mem.enum], the inconsistency can be solved most easily with alternative (1).
The example was taken exactly as is from DR1206, where it already seems to be an accidental copy-paste mishap because it is not important for the statement it is trying to make.
If one is willing to assume that, it is just an editorial issue.
Note: the example as is does not compile with any of the major compilers.
See here on Compiler Explorer: https://godbolt.org/z/xjM15MjP8