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Refactor std.range.chain to reduce symbol size bloat. #5611

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Refactor std.range.chain to reduce symbol size bloat. #5611

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15 changes: 9 additions & 6 deletions std/range/package.d
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Original file line number Diff line number Diff line change
Expand Up @@ -886,18 +886,22 @@ Returns:

See_Also: $(LREF only) to chain values to a range
*/
auto chain(Ranges...)(Ranges rs)
template chain(Ranges...)
if (Ranges.length > 0 &&
allSatisfy!(isInputRange, staticMap!(Unqual, Ranges)) &&
!is(CommonType!(staticMap!(ElementType, staticMap!(Unqual, Ranges))) == void))
{
static if (Ranges.length == 1)
auto chain(Ranges rs)
{
return rs[0];
static if (Ranges.length == 1)
return rs[0];
else
return Result(rs);
}
else

static if (Ranges.length > 1)
{
static struct Result
struct Result
{
private:
alias R = staticMap!(Unqual, Ranges);
Expand Down Expand Up @@ -1197,7 +1201,6 @@ if (Ranges.length > 0 &&
return result;
}
}
return Result(rs);
}
}

Expand Down