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std.range.choose: call payload postblit correctly #8935

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merged 1 commit into from Mar 3, 2024
Merged

std.range.choose: call payload postblit correctly #8935

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25 changes: 24 additions & 1 deletion std/range/package.d
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Expand Up @@ -1882,7 +1882,7 @@ private struct ChooseResult(Ranges...)
this(this)
{
actOnChosen!((ref r) {
static if (hasElaborateCopyConstructor!(typeof(r))) r.__postblit();
static if (hasElaborateCopyConstructor!(typeof(r))) r.__xpostblit();
})(this);
}

Expand Down Expand Up @@ -2177,6 +2177,29 @@ pure @safe nothrow unittest
assert(chosen2.front.v == 4);
}

// https://issues.dlang.org/show_bug.cgi?id=15708
@safe unittest
{
static struct HasPostblit
{
this(this) {}
}

static struct Range
{
bool empty;
int front;
void popFront() {}
HasPostblit member;
}

Range range;
int[] arr;

auto chosen = choose(true, range, arr);
auto copy = chosen;
}

/**
Choose one of multiple ranges at runtime.

Expand Down