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Function std.conv.unsigned

Returns the corresponding unsigned value for x (e.g. if x has type int, it returns cast(uint) x). The advantage compared to the cast is that you do not need to rewrite the cast if x later changes type (e.g from int to long).

auto unsigned(T) (
  T x
if (isIntegral!T);

auto unsigned(T) (
  T x
if (isSomeChar!T);

Note that the result is always mutable even if the original type was const or immutable. In order to retain the constness, use Unsigned.


import std.traits : Unsigned;
immutable int s = 42;
auto u1 = unsigned(s); //not qualified
static assert(is(typeof(u1) == uint));
Unsigned!(typeof(s)) u2 = unsigned(s); //same qualification
static assert(is(typeof(u2) == immutable uint));
immutable u3 = unsigned(s); //explicitly qualified


Walter Bright, Andrei Alexandrescu, Shin Fujishiro, Adam D. Ruppe, Kenji Hara


Boost License 1.0.