[Issue 13793] New: @nogc std.algorithm.count(std.range.only)

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13793

          Issue ID: 13793
           Summary: @nogc std.algorithm.count(std.range.only)
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Keywords: rejects-valid
          Severity: enhancement
          Priority: P1
         Component: Phobos
          Assignee: nob...@puremagic.com
          Reporter: bearophile_h...@eml.cc

I think this doesn't need to allocate heap memory:


void main() @nogc {
    import std.algorithm: count;
    import std.range: only;
    int[] a;
    auto r = a.count(only(0, 1));
}


dmd 2.067alpha:

test.d(5,21): Error: @nogc function 'D main' cannot call non-@nogc function
'std.algorithm.count!("a == b", int[], OnlyResult!(int, 1u)).count'

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