[temp.class.spec.match] Strengthen wording for matching partial specializations #3922
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
zygoloid
reviewed
Oct 18, 2020
Comment on lines
+3399
to
+3400
| template argument deduction\iref{temp.deduct.type} for \tcode{P} from \tcode{A} would succeed | ||
| and the deduced template arguments would satisfy the associated constraints |
There was a problem hiding this comment.
Suggested change
| template argument deduction\iref{temp.deduct.type} for \tcode{P} from \tcode{A} would succeed | |
| and the deduced template arguments would satisfy the associated constraints | |
| template argument deduction\iref{temp.deduct.type} for \tcode{P} from \tcode{A} succeeds | |
| and the deduced template arguments satisfy the associated constraints |
No need for the hypothetical here.
zygoloid
added
the
decision-required
|
I don't find the existing wording especially unclear, but this does seem more precise. |
|
Editorial meeting: No appetite to apply. |
jensmaurer
removed
the
decision-required
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
The current wording for [temp.class.spec.match] p2 leaves much to be desired in terms of precision:
Template argument deduction uses a concrete type "reference" to deduce the values of template parameters of a "target". Presumably when we say "template arguments of the partial specialization" we mean the template-argument-list, however, the "
Acan be deduced fromB" relation doesn't make the most sense here since it implies thatAis the resulting argument for a template parameter produced by the deduction, rather than the "target" of the deduction.