• via Digitalmars-d-bugs (25/25) Apr 28 2015 https://issues.dlang.org/show_bug.cgi?id=14519

via Digitalmars-d-bugs <digitalmars-d-bugs puremagic.com> writes:

https://issues.dlang.org/show_bug.cgi?id=14519

          Issue ID: 14519
           Summary: [Enh] foreach on strings should return
                    replacementDchar rather than throwing
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: DMD
          Assignee: nobody puremagic.com
          Reporter: bugzilla digitalmars.com

Consider:

   safe pure nothrow  nogc void bar();

  void foo(string s)  safe pure nothrow  nogc {
    foreach (dchar c; s)
        bar();
  }

This fails to compile because foreach over a decoded string can throw. It also
incorrectly is regarded as  nogc, because the throw can allocate.

Changing foreach to return replacementDchar on invalid UTF encodings fixes
these problems, and makes it possible to do faster loops.

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