[Issue 13020] New: std.ascii.isASCII for strings too or @nogc all!isASCII

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13020

          Issue ID: 13020
           Summary: std.ascii.isASCII for strings too or @nogc all!isASCII
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: Phobos
          Assignee: nobody at puremagic.com
          Reporter: bearophile_hugs at eml.cc

In std.ascii there is the function:

pure nothrow @safe bool isASCII(dchar c);

I suggest to add an isASCII overload that works on whole strings too (note that
it's @nogc too):

bool isASCII(in string s) pure nothrow @safe @nogc;

Currently you can write:

s.all!isASCII

But this is not @nogc.

An alternative solution is to make "all!isASCII" @nogc.

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