<format>: Make non-Standard constructors of basic_format_arg::handle and basic_format_context private
#4489
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Outdated suggestions cannot be applied.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.
Notes:
handle's constructor is exposition only and private in the standard wording ([format.arg]/10), so at least the constructor shouldn't be callable from user code. Removingstatic_assertmessages due to this.The standard wording seemingly leaves special member functions ofbasic_format_contextimplicitly declared ([format.context]), which means that its default constructor should be declared and defaulted.basic_format_contextare changed to take references to avoid double copy/move.basic_format_arg,handle, andbasic_format_contextare consistently performed by_Make_fromstatic member functions, and_Make_fromfunctions are consistently marked_NODISCARD.