| Issue |
181540
|
| Summary |
libc++ string constructor for repeating char fails using {} style
|
| Labels |
libc++
|
| Assignees |
|
| Reporter |
sambler
|
Since c++11 we can call constructors using a `string str{"string"}` syntax.
There is a string constructor available as `(size_t n, char c)` that creates a string of c repeated n times. This constructor fails when using the `{}` format.
Some string constructors that work using `{}`
```
string str2{"this is a string"};
cout << str2 << endl;
string str3{str2, 0, 4};
cout << str3 << endl;
```
Using the repeated char constructor
```
// works
string str10(10, 'x');
cout << str10 << endl;
// fails
string str11{10, 'x'}; // this results in a newline and one x
cout << str11 << endl;
```
I am on FreeBSD 15-stable and tested with clang 19.1.7 and 21.1.8 with `-std=c++xx` from c++11 to c++26 and all get the same result.
Complete test sample
```
#include <iostream>
#include <string>
using namespace std;
int main()
{
// works
string str1("this is a string");
cout << str1 << endl;
string str2{"this is a string"};
cout << str2 << endl;
string str3{str2, 0, 4};
cout << str3 << endl;
// works
string str10(10, 'x');
cout << str10 << endl;
// fails
string str11{10, 'x'}; // this results in a newline and one x
cout << str11 << endl;
}
```
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