On Saturday, 2 September 2017 at 18:07:51 UTC, bitwise wrote:
On Saturday, 2 September 2017 at 17:45:30 UTC, Moritz Maxeiner
wrote:
If this (unnecessary waste) is of concern to you (and from the
fact that you used ret.reserve I assume it is), then the easy
fix is to use `sformat` instead of `format`:
Yes, thanks. I'm going to go with a variation of your approach:
private
string toAsciiHex(string str)
{
import std.ascii : lowerHexDigits;
import std.exception: assumeUnique;
auto ret = new char[str.length * 2];
int i = 0;
foreach(c; str) {
ret[i++] = lowerHexDigits[(c >> 4) & 0xF];
ret[i++] = lowerHexDigits[c & 0xF];
}
return ret.assumeUnique;
}
If you never need the individual character function, that's
probably the best in terms of readability, though with a decent
compiler, that and the two functions one should result in the
same opcode (except for bitshift&bitmask swap).
I'm not sure how the compiler would mangle UTF8, but I intend
to use this on one specific function (actually the 100's of
instantiations of it).
In UTF8:
--- utfmangle.d ---
void fun_ༀ() {}
pragma(msg, fun_ༀ.mangleof);
-------------------
---
$ dmd -c utfmangle.d
_D6mangle7fun_ༀFZv
---
Only universal character names for identifiers are allowed,
though, as per [1]
[1] https://dlang.org/spec/lex.html#identifiers
