[issue21449] Replace _PyUnicode_CompareWithId with _PyUnicode_CompareWithIdEqual

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

> Callers should be fixed to handle errors.

This would make the code of callers more complex for small benefit. And perhaps we will add more callers (if replace PyUnicode_CompareWithASCII with new function).

> Since currently _PyUnicode_CompareWithId is used to compare a unicode with ascii identifiers for all cases, how about introduce a more specific function like _PyUnicode_EqualToASCIIId for this case?

Great idea Xiang!

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<http://bugs.python.org/issue21449>
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