www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.bugs - [Issue 17639] New: std.math.approxEqual accepts return of isNaN


          Issue ID: 17639
           Summary: std.math.approxEqual accepts return of isNaN (bool) as
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: drug2004 bk.ru

Found by typo, forget to remove `isNaN` and code still compiles giving wrong
import std.math;

int main()
    float a = 0, b = 10_000;

    static assert (!__traits(compiles, q{
            // isNaN wasn't removed during copy-paste
                // but code still compiles with wrong result
        assert (a.approxEqual(b.isNaN) == false);
    }), "This code must not compile!");

    return 0;

Jul 12 2017