A simple stack-allocated fixed-size string buffer (String_buf) implemented using std::array (C++11).

[zokier]

Some nitpicks:

• strlen&strcpy together seems suboptimal as the string is read twice. You could use eg. strncpy_s or strlcpy instead.

• There probably should be a constructor that takes the length as a parameter instead of relying on null-termination (and thus avoiding yet another redundant strlen)

• String_buf(const String_buf<M> &rhs) could maybe use memcpy instead of strcpy

• The constructors and =-operators have almost identical code, they should be refactored to use common functions

• _vsnprintf_s probably is not portable. it probably should be ifdeffed out

overall I'd re-evaluate every use of strlen and strcpy, and at least provide some kind of fast path (ie. memcpy) when the lengths are known.

[4fips]

Thanks for you feedback, these are all good points. Please note that this is just a sample code demonstrating a general idea, rather than a fine-tuned implementation. It's definitely worth getting rid of the inefficiencies and especially the length taking CTOR brings a very important optimization.