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
35.1k1084119
asked Jan 7 at 8:21
Hamza.SHamza.S
850314
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
35.1k1084119
asked Jan 7 at 8:21
Hamza.SHamza.S
850314
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
35.1k1084119
asked Jan 7 at 8:21
Hamza.SHamza.S
850314
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
35.1k1084119
asked Jan 7 at 8:21
Hamza.SHamza.S
850314
edited Jan 8 at 11:25
Rakete1111
35.1k1084119
asked Jan 7 at 8:21
Hamza.SHamza.S
850314
edited Jan 8 at 11:25
Rakete1111
35.1k1084119
edited Jan 8 at 11:25
Rakete1111
35.1k1084119
edited Jan 8 at 11:25
Rakete1111
35.1k1084119
35.1k1084119
asked Jan 7 at 8:21
Hamza.SHamza.S
850314
asked Jan 7 at 8:21
Hamza.SHamza.S
850314
asked Jan 7 at 8:21
Hamza.SHamza.S
850314
850314
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
40k7102129
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
119k12104189
5
Could have added some text from that link.
– CodeIt
Jan 8 at 2:14
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f54070743%2fwhat-is-the-following-list-of-behind-the-scenes-inside-the-range-based-for-loop%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
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
40k7102129
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
40k7102129
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
40k7102129
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
40k7102129
answered Jan 7 at 8:25
taskinoortaskinoor
40k7102129
answered Jan 7 at 8:25
taskinoortaskinoor
40k7102129
answered Jan 7 at 8:25
taskinoortaskinoor
40k7102129
40k7102129
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
119k12104189
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
119k12104189
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
119k12104189
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
119k12104189
edited Jan 7 at 19:47
answered Jan 7 at 8:23
Jarod42Jarod42
119k12104189
answered Jan 7 at 8:23
Jarod42Jarod42
119k12104189
answered Jan 7 at 8:23
Jarod42Jarod42
119k12104189
119k12104189
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 |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f54070743%2fwhat-is-the-following-list-of-behind-the-scenes-inside-the-range-based-for-loop%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
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