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Can Deduction Guide have an explicit(bool) specifier?
Can you use keyword explicit to prevent automatic conversion of method parameters?Is the safe-bool idiom obsolete in C++11?When should I really use noexcept?Template deduction guide for std::vector: qualified/non-qualified names for other std typesc++17 template deduction guide for partial specialisation - possible?C++17 template deduction guide not used for empty parameter set (ver 2)?Use deductions guides in implicit argument conversiontrailing return type of deduction guide is not a specializationShould deduction guide argument initialization considered by class template specialization deduction?How can a template parameter pack have both explicit and deduced arguments?
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Multiple parts of the standard indicate that deduction guide cannot have an explicit-specifier but can only have an explicit keyword preceding it.
like:
in temp.deduct.duide
deduction-guide:
explicitopttemplate-name ( parameter-declaration-clause ) -> simple-template-id ;
note that the standard says : explicitopt and not explicit-specifier.
or in dcl.fct.spec
An explicit-specifier shall be used only in the declaration of a constructor or conversion function within its class definition; ...
but the standard also says in over.match.class.deduct
If the function or function template was generated from a constructor or deduction-guide that had an explicit-specifier, each such notional constructor is considered to have that same explicit-specifier.
this quote implies that deduction-guides can have an explicit-specifier.
I do not see any particular reason why deduction guide couldn't have a explicit-specifier.
Is the issue in my understanding of the standard or in the standard itself ?
Can Deduction Guide have an explicit(bool) specifier ?
c++ language-lawyer c++20
edited Apr 22 at 13:48
Nicol Bolas
293k34484661
asked Apr 22 at 13:44
TykerTyker
2,280416
add a comment |
Multiple parts of the standard indicate that deduction guide cannot have an explicit-specifier but can only have an explicit keyword preceding it.
like:
in temp.deduct.duide
deduction-guide:
explicitopttemplate-name ( parameter-declaration-clause ) -> simple-template-id ;
note that the standard says : explicitopt and not explicit-specifier.
or in dcl.fct.spec
An explicit-specifier shall be used only in the declaration of a constructor or conversion function within its class definition; ...
but the standard also says in over.match.class.deduct
If the function or function template was generated from a constructor or deduction-guide that had an explicit-specifier, each such notional constructor is considered to have that same explicit-specifier.
this quote implies that deduction-guides can have an explicit-specifier.
I do not see any particular reason why deduction guide couldn't have a explicit-specifier.
Is the issue in my understanding of the standard or in the standard itself ?
Can Deduction Guide have an explicit(bool) specifier ?
c++ language-lawyer c++20
edited Apr 22 at 13:48
Nicol Bolas
293k34484661
asked Apr 22 at 13:44
TykerTyker
2,280416
add a comment |
Multiple parts of the standard indicate that deduction guide cannot have an explicit-specifier but can only have an explicit keyword preceding it.
like:
in temp.deduct.duide
deduction-guide:
explicitopttemplate-name ( parameter-declaration-clause ) -> simple-template-id ;
note that the standard says : explicitopt and not explicit-specifier.
or in dcl.fct.spec
An explicit-specifier shall be used only in the declaration of a constructor or conversion function within its class definition; ...
but the standard also says in over.match.class.deduct
If the function or function template was generated from a constructor or deduction-guide that had an explicit-specifier, each such notional constructor is considered to have that same explicit-specifier.
this quote implies that deduction-guides can have an explicit-specifier.
I do not see any particular reason why deduction guide couldn't have a explicit-specifier.
Is the issue in my understanding of the standard or in the standard itself ?
Can Deduction Guide have an explicit(bool) specifier ?
c++ language-lawyer c++20
edited Apr 22 at 13:48
Nicol Bolas
293k34484661
asked Apr 22 at 13:44
TykerTyker
2,280416
Multiple parts of the standard indicate that deduction guide cannot have an explicit-specifier but can only have an explicit keyword preceding it.
like:
in temp.deduct.duide
deduction-guide:
explicitopttemplate-name ( parameter-declaration-clause ) -> simple-template-id ;
note that the standard says : explicitopt and not explicit-specifier.
or in dcl.fct.spec
An explicit-specifier shall be used only in the declaration of a constructor or conversion function within its class definition; ...
but the standard also says in over.match.class.deduct
If the function or function template was generated from a constructor or deduction-guide that had an explicit-specifier, each such notional constructor is considered to have that same explicit-specifier.
this quote implies that deduction-guides can have an explicit-specifier.
I do not see any particular reason why deduction guide couldn't have a explicit-specifier.
Is the issue in my understanding of the standard or in the standard itself ?
Can Deduction Guide have an explicit(bool) specifier ?
c++ language-lawyer c++20
c++ language-lawyer c++20
edited Apr 22 at 13:48
Nicol Bolas
293k34484661
asked Apr 22 at 13:44
TykerTyker
2,280416
edited Apr 22 at 13:48
Nicol Bolas
293k34484661
asked Apr 22 at 13:44
TykerTyker
2,280416
edited Apr 22 at 13:48
Nicol Bolas
293k34484661
edited Apr 22 at 13:48
Nicol Bolas
293k34484661
edited Apr 22 at 13:48
Nicol Bolas
293k34484661
293k34484661
asked Apr 22 at 13:44
TykerTyker
2,280416
asked Apr 22 at 13:44
TykerTyker
2,280416
asked Apr 22 at 13:44
TykerTyker
2,280416
2,280416
add a comment |
add a comment |
1 Answer
1
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I do not see any particular reason why deduction guide couldn't have a explicit-specifier.
Me neither. Seems like a total oversight on my part (I'm one of the authors of conditional explicit). I'll try to file a core issue.
answered Apr 22 at 13:48
BarryBarry
189k21337618
add a comment |
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I do not see any particular reason why deduction guide couldn't have a explicit-specifier.
Me neither. Seems like a total oversight on my part (I'm one of the authors of conditional explicit). I'll try to file a core issue.
answered Apr 22 at 13:48
BarryBarry
189k21337618
add a comment |
I do not see any particular reason why deduction guide couldn't have a explicit-specifier.
Me neither. Seems like a total oversight on my part (I'm one of the authors of conditional explicit). I'll try to file a core issue.
answered Apr 22 at 13:48
BarryBarry
189k21337618
add a comment |
I do not see any particular reason why deduction guide couldn't have a explicit-specifier.
Me neither. Seems like a total oversight on my part (I'm one of the authors of conditional explicit). I'll try to file a core issue.
answered Apr 22 at 13:48
BarryBarry
189k21337618
I do not see any particular reason why deduction guide couldn't have a explicit-specifier.
Me neither. Seems like a total oversight on my part (I'm one of the authors of conditional explicit). I'll try to file a core issue.
answered Apr 22 at 13:48
BarryBarry
189k21337618
answered Apr 22 at 13:48
BarryBarry
189k21337618
answered Apr 22 at 13:48
BarryBarry
189k21337618
answered Apr 22 at 13:48
BarryBarry
189k21337618
189k21337618
add a comment |
add a comment |
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