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fix issue 18804 - std.algorithm.mutation.copy puts whole source range into target range when it should put elements

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This commit is contained in:
aG0aep6G 2018-04-30 03:06:02 +02:00
parent 42e9d6ffb9
commit 19052b08de
1 changed files with 20 additions and 1 deletions
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21
std/algorithm/mutation.d
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@ -414,7 +414,8 @@ if (!areCopyCompatibleArrays!(SourceRange, TargetRange) &&
}
else
{
put(target, source);
foreach (element; source)
put(target, element);
return target;
}
}
@ -535,6 +536,24 @@ $(LINK2 http://en.cppreference.com/w/cpp/algorithm/copy_backward, STL's `copy_ba
}}
}
@safe unittest // issue 18804
{
static struct NullSink
{
void put(E)(E) {}
}
int line = 0;
struct R
{
int front;
@property bool empty() { return line == 1; }
void popFront() { line = 1; }
}
R r;
copy(r, NullSink());
assert(line == 1);
}
/**
Assigns `value` to each element of input range `range`.