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












42














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.
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  • 4




    try {true, false} for kicks.
    – user1095108
    22 hours ago






  • 1




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
















42














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.
















  • 4




    try {true, false} for kicks.
    – user1095108
    22 hours ago






  • 1




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














42












42








42


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 6 hours ago









Rakete1111

34.1k980117




34.1k980117






New contributor




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Check out our Code of Conduct.









asked yesterday









Hamza.SHamza.S

22329




22329




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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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Hamza.S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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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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  • 4




    try {true, false} for kicks.
    – user1095108
    22 hours ago






  • 1




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














  • 4




    try {true, false} for kicks.
    – user1095108
    22 hours ago






  • 1




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








4




4




try {true, false} for kicks.
– user1095108
22 hours ago




try {true, false} for kicks.
– user1095108
22 hours ago




1




1




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




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












2 Answers
2






active

oldest

votes


















51














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



















14















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



















  • 1




    Could have added some text from that link.
    – CodeIt
    15 hours ago











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2 Answers
2






active

oldest

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2 Answers
2






active

oldest

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active

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active

oldest

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51














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
















51














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














51












51








51






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 yesterday









taskinoortaskinoor

39.3k799128




39.3k799128












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


















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
















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




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













14















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



















  • 1




    Could have added some text from that link.
    – CodeIt
    15 hours ago
















14















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



















  • 1




    Could have added some text from that link.
    – CodeIt
    15 hours ago














14












14








14







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 22 hours ago

























answered yesterday









Jarod42Jarod42

113k12101182




113k12101182








  • 1




    Could have added some text from that link.
    – CodeIt
    15 hours ago














  • 1




    Could have added some text from that link.
    – CodeIt
    15 hours ago








1




1




Could have added some text from that link.
– CodeIt
15 hours ago




Could have added some text from that link.
– CodeIt
15 hours ago










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










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