What is the word pack in C++ draft?












2















What is the pack means in the C++ draft standard [basic]p3? Could you provide some concrete explanation, if cannot be explained in precise term?




An entity is a value, object, reference, structured binding, function, enumerator, type, class member, bit-field, template, template specialization, namespace, or pack.







c++







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  • 1





    Probably a parameter pack

    – Thomas Lang
    Nov 25 '18 at 19:52











  • why the downvote?

    – Andreas H.
    Nov 25 '18 at 19:54











  • Dunno, I didn't do it. Seems a valid question to me.

    – Thomas Lang
    Nov 25 '18 at 19:56











  • @ThomasLang: So it's restricted to only template?

    – ptr_NE
    Nov 25 '18 at 19:58






  • 3





    For future reference, the wp has an index. A word search there will usually bring you to the definition of things that pop up in the standard.

    – StoryTeller
    Nov 25 '18 at 20:01
















2















What is the pack means in the C++ draft standard [basic]p3? Could you provide some concrete explanation, if cannot be explained in precise term?




An entity is a value, object, reference, structured binding, function, enumerator, type, class member, bit-field, template, template specialization, namespace, or pack.







c++







share|improve this question




















  • 1





    Probably a parameter pack

    – Thomas Lang
    Nov 25 '18 at 19:52











  • why the downvote?

    – Andreas H.
    Nov 25 '18 at 19:54











  • Dunno, I didn't do it. Seems a valid question to me.

    – Thomas Lang
    Nov 25 '18 at 19:56











  • @ThomasLang: So it's restricted to only template?

    – ptr_NE
    Nov 25 '18 at 19:58






  • 3





    For future reference, the wp has an index. A word search there will usually bring you to the definition of things that pop up in the standard.

    – StoryTeller
    Nov 25 '18 at 20:01














2












2








2








What is the pack means in the C++ draft standard [basic]p3? Could you provide some concrete explanation, if cannot be explained in precise term?




An entity is a value, object, reference, structured binding, function, enumerator, type, class member, bit-field, template, template specialization, namespace, or pack.







c++







share|improve this question
















What is the pack means in the C++ draft standard [basic]p3? Could you provide some concrete explanation, if cannot be explained in precise term?




An entity is a value, object, reference, structured binding, function, enumerator, type, class member, bit-field, template, template specialization, namespace, or pack.







c++




c++






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 25 '18 at 20:58









Shafik Yaghmour

126k23324537




126k23324537










asked Nov 25 '18 at 19:51









ptr_NEptr_NE

603324




603324








  • 1





    Probably a parameter pack

    – Thomas Lang
    Nov 25 '18 at 19:52











  • why the downvote?

    – Andreas H.
    Nov 25 '18 at 19:54











  • Dunno, I didn't do it. Seems a valid question to me.

    – Thomas Lang
    Nov 25 '18 at 19:56











  • @ThomasLang: So it's restricted to only template?

    – ptr_NE
    Nov 25 '18 at 19:58






  • 3





    For future reference, the wp has an index. A word search there will usually bring you to the definition of things that pop up in the standard.

    – StoryTeller
    Nov 25 '18 at 20:01














  • 1





    Probably a parameter pack

    – Thomas Lang
    Nov 25 '18 at 19:52











  • why the downvote?

    – Andreas H.
    Nov 25 '18 at 19:54











  • Dunno, I didn't do it. Seems a valid question to me.

    – Thomas Lang
    Nov 25 '18 at 19:56











  • @ThomasLang: So it's restricted to only template?

    – ptr_NE
    Nov 25 '18 at 19:58






  • 3





    For future reference, the wp has an index. A word search there will usually bring you to the definition of things that pop up in the standard.

    – StoryTeller
    Nov 25 '18 at 20:01








1




1





Probably a parameter pack

– Thomas Lang
Nov 25 '18 at 19:52





Probably a parameter pack

– Thomas Lang
Nov 25 '18 at 19:52













why the downvote?

– Andreas H.
Nov 25 '18 at 19:54





why the downvote?

– Andreas H.
Nov 25 '18 at 19:54













Dunno, I didn't do it. Seems a valid question to me.

– Thomas Lang
Nov 25 '18 at 19:56





Dunno, I didn't do it. Seems a valid question to me.

– Thomas Lang
Nov 25 '18 at 19:56













@ThomasLang: So it's restricted to only template?

– ptr_NE
Nov 25 '18 at 19:58





@ThomasLang: So it's restricted to only template?

– ptr_NE
Nov 25 '18 at 19:58




3




3





For future reference, the wp has an index. A word search there will usually bring you to the definition of things that pop up in the standard.

– StoryTeller
Nov 25 '18 at 20:01





For future reference, the wp has an index. A word search there will usually bring you to the definition of things that pop up in the standard.

– StoryTeller
Nov 25 '18 at 20:01












1 Answer
1






active

oldest

votes


















4














The standard also has an index and if we search for pack in the index we have the following entry for pack:




pack, [temp.variadic]




which leads to [temp.variadic]p4 which says:




A pack is a template parameter pack, a function parameter pack, or an init-capture pack.
The number of elements of a template parameter pack or a function parameter pack is the number of arguments provided for the parameter pack.
The number of elements of an init-capture pack is the number of elements in the pack expansion of its initializer.







share|improve this answer


























  • do you have any advice about reading the C++ draft, or is that just I think it's hard to understand? Or could you provide an approximation about how long it will take to understand it? Thanks for your answer and reading.

    – ptr_NE
    Nov 28 '18 at 23:15













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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









4














The standard also has an index and if we search for pack in the index we have the following entry for pack:




pack, [temp.variadic]




which leads to [temp.variadic]p4 which says:




A pack is a template parameter pack, a function parameter pack, or an init-capture pack.
The number of elements of a template parameter pack or a function parameter pack is the number of arguments provided for the parameter pack.
The number of elements of an init-capture pack is the number of elements in the pack expansion of its initializer.







share|improve this answer


























  • do you have any advice about reading the C++ draft, or is that just I think it's hard to understand? Or could you provide an approximation about how long it will take to understand it? Thanks for your answer and reading.

    – ptr_NE
    Nov 28 '18 at 23:15


















4














The standard also has an index and if we search for pack in the index we have the following entry for pack:




pack, [temp.variadic]




which leads to [temp.variadic]p4 which says:




A pack is a template parameter pack, a function parameter pack, or an init-capture pack.
The number of elements of a template parameter pack or a function parameter pack is the number of arguments provided for the parameter pack.
The number of elements of an init-capture pack is the number of elements in the pack expansion of its initializer.







share|improve this answer


























  • do you have any advice about reading the C++ draft, or is that just I think it's hard to understand? Or could you provide an approximation about how long it will take to understand it? Thanks for your answer and reading.

    – ptr_NE
    Nov 28 '18 at 23:15
















4












4








4







The standard also has an index and if we search for pack in the index we have the following entry for pack:




pack, [temp.variadic]




which leads to [temp.variadic]p4 which says:




A pack is a template parameter pack, a function parameter pack, or an init-capture pack.
The number of elements of a template parameter pack or a function parameter pack is the number of arguments provided for the parameter pack.
The number of elements of an init-capture pack is the number of elements in the pack expansion of its initializer.







share|improve this answer















The standard also has an index and if we search for pack in the index we have the following entry for pack:




pack, [temp.variadic]




which leads to [temp.variadic]p4 which says:




A pack is a template parameter pack, a function parameter pack, or an init-capture pack.
The number of elements of a template parameter pack or a function parameter pack is the number of arguments provided for the parameter pack.
The number of elements of an init-capture pack is the number of elements in the pack expansion of its initializer.








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edited Nov 25 '18 at 21:10

























answered Nov 25 '18 at 20:53









Shafik YaghmourShafik Yaghmour

126k23324537




126k23324537













  • do you have any advice about reading the C++ draft, or is that just I think it's hard to understand? Or could you provide an approximation about how long it will take to understand it? Thanks for your answer and reading.

    – ptr_NE
    Nov 28 '18 at 23:15





















  • do you have any advice about reading the C++ draft, or is that just I think it's hard to understand? Or could you provide an approximation about how long it will take to understand it? Thanks for your answer and reading.

    – ptr_NE
    Nov 28 '18 at 23:15



















do you have any advice about reading the C++ draft, or is that just I think it's hard to understand? Or could you provide an approximation about how long it will take to understand it? Thanks for your answer and reading.

– ptr_NE
Nov 28 '18 at 23:15







do you have any advice about reading the C++ draft, or is that just I think it's hard to understand? Or could you provide an approximation about how long it will take to understand it? Thanks for your answer and reading.

– ptr_NE
Nov 28 '18 at 23:15




















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