What is the following list of behind the scenes inside the range-based for loop?












54














I am studying C++ and I saw a range-based for loop like this:



for (int i : {1,2,3,4,5})

    std::cout << i << ' ';


What is the temporary {1,2,3,4,5} in the for loop behind the scenes?






c++ for-loop







share|improve this question









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Hamza.S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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  • 5




    try {true, false} for kicks.
    – user1095108
    2 days ago






  • 1




    @user1095108 It's fine, But i think It is simple and understandable to everyone .
    – Hamza.S
    2 days ago
















54














I am studying C++ and I saw a range-based for loop like this:



for (int i : {1,2,3,4,5})

    std::cout << i << ' ';


What is the temporary {1,2,3,4,5} in the for loop behind the scenes?






c++ for-loop







share|improve this question









New contributor




Hamza.S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
















  • 5




    try {true, false} for kicks.
    – user1095108
    2 days ago






  • 1




    @user1095108 It's fine, But i think It is simple and understandable to everyone .
    – Hamza.S
    2 days ago














54












54








54


8





I am studying C++ and I saw a range-based for loop like this:



for (int i : {1,2,3,4,5})

    std::cout << i << ' ';


What is the temporary {1,2,3,4,5} in the for loop behind the scenes?






c++ for-loop







share|improve this question









New contributor




Hamza.S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











I am studying C++ and I saw a range-based for loop like this:



for (int i : {1,2,3,4,5})

    std::cout << i << ' ';


What is the temporary {1,2,3,4,5} in the for loop behind the scenes?






c++ for-loop




c++ for-loop






share|improve this question









New contributor




Hamza.S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









New contributor




Hamza.S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question








edited yesterday









Rakete1111

34.2k980117




34.2k980117






New contributor




Hamza.S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked 2 days ago









Hamza.SHamza.S

28329




28329




New contributor




Hamza.S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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New contributor





Hamza.S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Hamza.S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.








  • 5




    try {true, false} for kicks.
    – user1095108
    2 days ago






  • 1




    @user1095108 It's fine, But i think It is simple and understandable to everyone .
    – Hamza.S
    2 days ago














  • 5




    try {true, false} for kicks.
    – user1095108
    2 days ago






  • 1




    @user1095108 It's fine, But i think It is simple and understandable to everyone .
    – Hamza.S
    2 days ago








5




5




try {true, false} for kicks.
– user1095108
2 days ago




try {true, false} for kicks.
– user1095108
2 days ago




1




1




@user1095108 It's fine, But i think It is simple and understandable to everyone .
– Hamza.S
2 days ago




@user1095108 It's fine, But i think It is simple and understandable to everyone .
– Hamza.S
2 days ago












2 Answers
2






active

oldest

votes


















66














The object here is an instance of std::initializer_list<int>. From the reference (emphasis mine):




A std::initializer_list object is automatically constructed when:



a braced-init-list is used to list-initialize an object, where the corresponding constructor accepts an std::initializer_list parameter



a braced-init-list is used as the right operand of assignment or as a function call argument, and the corresponding assignment operator/function accepts an std::initializer_list parameter



a braced-init-list is bound to auto, including in a ranged for loop







share|improve this answer

















  • 2




    The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
    – Rakete1111
    yesterday



















18















What is the temporary {1,2,3,4,5} in the for loop behind the scenes?




a std::initializer_list<int>






share|improve this answer



















  • 3




    Could have added some text from that link.
    – CodeIt
    2 days ago











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2 Answers
2






active

oldest

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2 Answers
2






active

oldest

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active

oldest

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active

oldest

votes









66














The object here is an instance of std::initializer_list<int>. From the reference (emphasis mine):




A std::initializer_list object is automatically constructed when:



a braced-init-list is used to list-initialize an object, where the corresponding constructor accepts an std::initializer_list parameter



a braced-init-list is used as the right operand of assignment or as a function call argument, and the corresponding assignment operator/function accepts an std::initializer_list parameter



a braced-init-list is bound to auto, including in a ranged for loop







share|improve this answer

















  • 2




    The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
    – Rakete1111
    yesterday
















66














The object here is an instance of std::initializer_list<int>. From the reference (emphasis mine):




A std::initializer_list object is automatically constructed when:



a braced-init-list is used to list-initialize an object, where the corresponding constructor accepts an std::initializer_list parameter



a braced-init-list is used as the right operand of assignment or as a function call argument, and the corresponding assignment operator/function accepts an std::initializer_list parameter



a braced-init-list is bound to auto, including in a ranged for loop







share|improve this answer

















  • 2




    The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
    – Rakete1111
    yesterday














66












66








66






The object here is an instance of std::initializer_list<int>. From the reference (emphasis mine):




A std::initializer_list object is automatically constructed when:



a braced-init-list is used to list-initialize an object, where the corresponding constructor accepts an std::initializer_list parameter



a braced-init-list is used as the right operand of assignment or as a function call argument, and the corresponding assignment operator/function accepts an std::initializer_list parameter



a braced-init-list is bound to auto, including in a ranged for loop







share|improve this answer












The object here is an instance of std::initializer_list<int>. From the reference (emphasis mine):




A std::initializer_list object is automatically constructed when:



a braced-init-list is used to list-initialize an object, where the corresponding constructor accepts an std::initializer_list parameter



a braced-init-list is used as the right operand of assignment or as a function call argument, and the corresponding assignment operator/function accepts an std::initializer_list parameter



a braced-init-list is bound to auto, including in a ranged for loop








share|improve this answer












share|improve this answer



share|improve this answer










answered 2 days ago









taskinoortaskinoor

39.5k799128




39.5k799128








  • 2




    The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
    – Rakete1111
    yesterday














  • 2




    The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
    – Rakete1111
    yesterday








2




2




The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
– Rakete1111
yesterday




The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
– Rakete1111
yesterday













18















What is the temporary {1,2,3,4,5} in the for loop behind the scenes?




a std::initializer_list<int>






share|improve this answer



















  • 3




    Could have added some text from that link.
    – CodeIt
    2 days ago
















18















What is the temporary {1,2,3,4,5} in the for loop behind the scenes?




a std::initializer_list<int>






share|improve this answer



















  • 3




    Could have added some text from that link.
    – CodeIt
    2 days ago














18












18








18







What is the temporary {1,2,3,4,5} in the for loop behind the scenes?




a std::initializer_list<int>






share|improve this answer















What is the temporary {1,2,3,4,5} in the for loop behind the scenes?




a std::initializer_list<int>







share|improve this answer














share|improve this answer



share|improve this answer








edited 2 days ago

























answered 2 days ago









Jarod42Jarod42

114k12101182




114k12101182








  • 3




    Could have added some text from that link.
    – CodeIt
    2 days ago














  • 3




    Could have added some text from that link.
    – CodeIt
    2 days ago








3




3




Could have added some text from that link.
– CodeIt
2 days ago




Could have added some text from that link.
– CodeIt
2 days ago










Hamza.S is a new contributor. Be nice, and check out our Code of Conduct.










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