mirrors/phobos
1
0
Fork 0
mirror of https://github.com/dlang/phobos.git synced 2025-04-29 14:40:30 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Constrain swap() with isMutable!T so that const objects should not be swapped. std.traits.isMutable is undocumented for now.

Browse source
This commit is contained in:
Shin Fujishiro 2010-11-18 21:45:18 +00:00
parent dcd1561de3
commit af1fb0b618
3 changed files with 33 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

8
std/algorithm.d
View file

@ -1061,7 +1061,7 @@ $(D !pointsTo(lhs, lhs) && !pointsTo(lhs, rhs) && !pointsTo(rhs, lhs)
&& !pointsTo(rhs, rhs))
*/
void swap(T)(ref T lhs, ref T rhs) @trusted pure nothrow
if (!is(typeof(T.init.proxySwap(T.init))))
if (isMutable!T && !is(typeof(T.init.proxySwap(T.init))))
{
static if (hasElaborateAssign!T)
{
@ -1120,6 +1120,9 @@ unittest
assert(s2.x == 0);
assert(s2.c == 'z');
assert(s2.y == [ 1, 2 ]);
immutable int imm1, imm2;
static assert(!__traits(compiles, swap(imm1, imm2)));
}
unittest
@ -1147,6 +1150,9 @@ unittest
swap(h1, h2);
assert(h1.noCopy.n == 65 && h1.noCopy.s == null);
assert(h2.noCopy.n == 31 && h2.noCopy.s == "abc");
const NoCopy const1, const2;
static assert(!__traits(compiles, swap(const1, const2)));
}
void swapFront(R1, R2)(R1 r1, R2 r2)