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Issue 10408 - Fix compile error with multiple-function reduce on a const range.

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This commit is contained in:
irritate 2013-06-21 22:54:55 -04:00
parent fdbf4f32c1
commit 58d403a02d
1 changed files with 13 additions and 2 deletions
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15
std/algorithm.d
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@ -743,11 +743,12 @@ template reduce(fun...) if (fun.length >= 1)
else
{
static assert(fun.length > 1);
typeof(adjoin!(staticMap!(binaryFun, fun))(r.front, r.front))
Unqual!(typeof(r.front)) seed = r.front;
typeof(adjoin!(staticMap!(binaryFun, fun))(seed, seed))
result = void;
foreach (i, T; result.Types)
{
emplace(&result[i], r.front);
emplace(&result[i], seed);
}
r.popFront();
return reduce(result, r);
@ -905,6 +906,16 @@ unittest
r = reduce!"a + b"(a, c);
}
unittest
{
// Issue #10408 - Two-function reduce of a const array.
const numbers = [10, 30, 20];
immutable m = reduce!(min)(numbers);
assert(m == 10);
immutable minmax = reduce!(min, max)(numbers);
assert(minmax == tuple(10, 30));
}
/**
Fills $(D range) with a $(D filler).