[Issue 3814] New: Mutation of immutable string

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=3814

           Summary: Mutation of immutable string
           Product: D
           Version: 2.040
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: druntime
        AssignedTo: sean at invisibleduck.org
        ReportedBy: bearophile_hugs at eml.cc


--- Comment #0 from bearophile_hugs at eml.cc 2010-02-18 09:51:03 PST ---
import std.stdio: writeln;
void main() {
    string s = "ab";
    s.length += 1;
    //writeln(typeid(typeof(s))); // Prints:
    s[2] = 'a'; // test5.d(6): Error: s[2] isn't mutable
}

Why is length+=1 allowed if s is immutable?

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