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Merge pull request #7459 from MoonlightSentinel/chunk-ref

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Fix Issue 20496 - chunkby should support ref predicate
merged-on-behalf-of: Nicholas Wilson <thewilsonator@users.noreply.github.com>
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The Dlang Bot 2020-04-26 04:28:48 +02:00 • committed by GitHub
commit 6db7dce61d
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1 changed files with 9 additions and 5 deletions
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14
std/algorithm/iteration.d
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@ -1904,12 +1904,11 @@ if (isInputRange!Range && !isForwardRange!Range)
private template ChunkByImplIsUnary(alias pred, Range)
{
static if (is(typeof(binaryFun!pred(ElementType!Range.init,
ElementType!Range.init)) : bool))
alias e = lvalueOf!(ElementType!Range);
static if (is(typeof(binaryFun!pred(e, e)) : bool))
enum ChunkByImplIsUnary = false;
else static if (is(typeof(
unaryFun!pred(ElementType!Range.init) ==
unaryFun!pred(ElementType!Range.init))))
else static if (is(typeof(unaryFun!pred(e) == unaryFun!pred(e)) : bool))
enum ChunkByImplIsUnary = true;
else
static assert(0, "chunkBy expects either a binary predicate or "~
@ -2641,6 +2640,11 @@ version (none) // this example requires support for non-equivalence relations
}
}
// https://issues.dlang.org/show_bug.cgi?id=20496
{
auto r = [1,1,1,2,2,2,3,3,3];
r.chunkBy!((ref e1, ref e2) => e1 == e2);
}
}
// https://issues.dlang.org/show_bug.cgi?id=13595