[Issue 19899] New: std.bitmanip.bitsSet should accept const arguments

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19899

          Issue ID: 19899
           Summary: std.bitmanip.bitsSet should accept const arguments
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: minor
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: n8sh.secondary at hotmail.com

The following currently fails to compile:
----
void main()
{
    import std.bitmanip : bitsSet;
    const rawBits = 123;
    auto b = bitsSet(rawBits);
}
----

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