Mixing
What is the following list of behind the scenes inside the range-based for loop?
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
edited Jan 8 at 11:25
Rakete1111
34.3k1082117
asked Jan 7 at 8:21
Hamza.SHamza.S
659211
add a comment |
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
edited Jan 8 at 11:25
Rakete1111
34.3k1082117
asked Jan 7 at 8:21
Hamza.SHamza.S
659211
7
try{true, false}for kicks.
– user1095108
Jan 7 at 19:50
1
@user1095108 It's fine, But i think It is simple and understandable to everyone .
– Hamza.S
Jan 7 at 23:59
add a comment |
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
edited Jan 8 at 11:25
Rakete1111
34.3k1082117
asked Jan 7 at 8:21
Hamza.SHamza.S
659211
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
edited Jan 8 at 11:25
Rakete1111
34.3k1082117
asked Jan 7 at 8:21
Hamza.SHamza.S
659211
edited Jan 8 at 11:25
Rakete1111
34.3k1082117
asked Jan 7 at 8:21
Hamza.SHamza.S
659211
edited Jan 8 at 11:25
Rakete1111
34.3k1082117
edited Jan 8 at 11:25
Rakete1111
34.3k1082117
edited Jan 8 at 11:25
Rakete1111
34.3k1082117
34.3k1082117
asked Jan 7 at 8:21
Hamza.SHamza.S
659211
asked Jan 7 at 8:21
Hamza.SHamza.S
659211
asked Jan 7 at 8:21
Hamza.SHamza.S
659211
659211
7
try{true, false}for kicks.
– user1095108
Jan 7 at 19:50
1
@user1095108 It's fine, But i think It is simple and understandable to everyone .
– Hamza.S
Jan 7 at 23:59
add a comment |
7
try{true, false}for kicks.
– user1095108
Jan 7 at 19:50
1
@user1095108 It's fine, But i think It is simple and understandable to everyone .
– Hamza.S
Jan 7 at 23:59
7
7
try
{true, false} for kicks.– user1095108
Jan 7 at 19:50
try
{true, false} for kicks.– user1095108
Jan 7 at 19:50
1
1
@user1095108 It's fine, But i think It is simple and understandable to everyone .
– Hamza.S
Jan 7 at 23:59
@user1095108 It's fine, But i think It is simple and understandable to everyone .
– Hamza.S
Jan 7 at 23:59
add a comment |
2 Answers
2
active
oldest
votes
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
answered Jan 7 at 8:25
taskinoortaskinoor
39.6k7100128
2
The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
– Rakete1111
Jan 8 at 8:51
add a comment |
What is the temporary {1,2,3,4,5} in the for loop behind the scenes?
a std::initializer_list<int>
answered Jan 7 at 8:23
Jarod42Jarod42
115k12101182
5
Could have added some text from that link.
– CodeIt
Jan 8 at 2:14
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
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
answered Jan 7 at 8:25
taskinoortaskinoor
39.6k7100128
2
The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
– Rakete1111
Jan 8 at 8:51
add a comment |
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
answered Jan 7 at 8:25
taskinoortaskinoor
39.6k7100128
2
The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
– Rakete1111
Jan 8 at 8:51
add a comment |
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
answered Jan 7 at 8:25
taskinoortaskinoor
39.6k7100128
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
answered Jan 7 at 8:25
taskinoortaskinoor
39.6k7100128
answered Jan 7 at 8:25
taskinoortaskinoor
39.6k7100128
answered Jan 7 at 8:25
taskinoortaskinoor
39.6k7100128
answered Jan 7 at 8:25
taskinoortaskinoor
39.6k7100128
39.6k7100128
2
The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
– Rakete1111
Jan 8 at 8:51
add a comment |
2
The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
– Rakete1111
Jan 8 at 8:51
2
2
The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
– Rakete1111
Jan 8 at 8:51
The braced initializer list is not an object, but I guess pretending that it is is fine in this case.
– Rakete1111
Jan 8 at 8:51
add a comment |
What is the temporary {1,2,3,4,5} in the for loop behind the scenes?
a std::initializer_list<int>
answered Jan 7 at 8:23
Jarod42Jarod42
115k12101182
5
Could have added some text from that link.
– CodeIt
Jan 8 at 2:14
add a comment |
What is the temporary {1,2,3,4,5} in the for loop behind the scenes?
a std::initializer_list<int>
answered Jan 7 at 8:23
Jarod42Jarod42
115k12101182
5
Could have added some text from that link.
– CodeIt
Jan 8 at 2:14
add a comment |
What is the temporary {1,2,3,4,5} in the for loop behind the scenes?
a std::initializer_list<int>
answered Jan 7 at 8:23
Jarod42Jarod42
115k12101182
What is the temporary {1,2,3,4,5} in the for loop behind the scenes?
a std::initializer_list<int>
answered Jan 7 at 8:23
Jarod42Jarod42
115k12101182
edited Jan 7 at 19:47
answered Jan 7 at 8:23
Jarod42Jarod42
115k12101182
answered Jan 7 at 8:23
Jarod42Jarod42
115k12101182
answered Jan 7 at 8:23
Jarod42Jarod42
115k12101182
115k12101182
5
Could have added some text from that link.
– CodeIt
Jan 8 at 2:14
add a comment |
5
Could have added some text from that link.
– CodeIt
Jan 8 at 2:14
5
5
Could have added some text from that link.
– CodeIt
Jan 8 at 2:14
Could have added some text from that link.
– CodeIt
Jan 8 at 2:14
add a comment |
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7
try
{true, false}for kicks.– user1095108
Jan 7 at 19:50
1
@user1095108 It's fine, But i think It is simple and understandable to everyone .
– Hamza.S
Jan 7 at 23:59