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digitalmars.D.bugs - [Issue 1790] New: CTFE: foreach(Tuple) won't compile if Tuple contains string

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=1790

           Summary: CTFE: foreach(Tuple) won't compile if Tuple contains
                    string
           Product: D
           Version: 1.025
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Keywords: rejects-valid
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla digitalmars.com
        ReportedBy: clugdbug yahoo.com.au


Oddly, it compiles if you commment out the ; -- the foreach has to be
non-empty. Behaviour is quite odd; if there are several items in the tuple, it
will work if you don't use the whole tuple; eg Types[0..$-1] and Types[1..$]
will work. So it sounds like some kind of memory corruption/unterminated string
or similar.

Possibly the root cause of some of the bugs in issue 1298.

========
bug.d(9): Error: cannot evaluate foo() at compile time
---
int foo(Types...)() {
    foreach(T; Types) {
        ;   // will compile if you remove this line
    }
    return 0;
}

const int q = foo!("")();


-- 
Jan 17 2008
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=1790





------- Comment #1 from clugdbug yahoo.com.au  2009-02-03 08:18 -------
This workaround for this bug has changed. On 1.039, it now fails even if you
comment out the marked line. But it compiles if you add [] to the string.

int foo(Types...)() {
    foreach(T; Types) {
        ;
    }
    return 0;
}

const int q = foo!("abc"[])(); // OK


-- 
Feb 03 2009
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=1790


Walter Bright <bugzilla digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |bugzilla digitalmars.com
         Resolution|                            |FIXED


--- Comment #2 from Walter Bright <bugzilla digitalmars.com> 2010-01-30
22:40:04 PST ---
fixed dmd 1.056 and 2.040

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