[Issue 18287] New: several std.math functions no longer work with alias this

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18287

          Issue ID: 18287
           Summary: several std.math functions no longer work with alias
                    this
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: regression
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: john.loughran.colvin at gmail.com

https://github.com/dlang/phobos/pull/6040/files changed several functions
(signbit, isFinite, isNormal, isSubnormal, sign, nextAfter and approxEqual to
enforce type matching, meaning that all alias-this types no longer work with
them

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