On Thursday, 5 December 2013 at 17:30:37 UTC, inout wrote:
My approach in cases like that used to be to pass an optional
char[] buffer = null as last argument (it doesn't work as nice
in variadic functions though):
// constructs the result in a buffer if one is passed until
there is no more space left, in which case it reallocates the
buffer
char[] buildPath(const(char)[] path1, const(char)[] path2,
char[] buffer = null) {
Appender!(char) appender = useBuffer(buffer);
...
}
The nice thing about output ranges instead of this approach is
the allocation strategy is left up to the caller rather than the
function. I think generalized SSO (a small static buffer that
can fall back to a dynamic allocation) will become a very common
idiom as more and more of phobos accepts output ranges.
