cpp/string/basic string/operator+=

Appends additional characters to the string.

@1@ Appends string.

@2@ Appends character.

@3@ Appends the null-terminated character string pointed to by.

@4@ Appends characters in the initializer list.

@5@

Complexity
There are no standard complexity guarantees, typical implementations behave similar to.

Exceptions
If the operation would result in, throws std.