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Your call to subject.replace in ReplaceStringInPlace() is that really modifying the string inplace?

Damian
– Damian

2016-07-13 09:08:26 +00:00
Commented Jul 13, 2016 at 9:08
I briefly looked at the source and it looks like it does use move semantics to move the front of the old string into place, so that is not copied, but the new piece inserted is copied into the old string and the tail of the old string is copied into the resized buffered of the old string. It is possible that the string expands so much the entire underlying buffer is reallocated, but if you replace 1 to 1 as in his example, I think it does occur "in place", or without any copying, but if you expand the string, only the first part of the old string is not copied, and only maybe then.

Motomotes
– Motomotes

2016-10-13 21:38:09 +00:00
Commented Oct 13, 2016 at 21:38

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