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digitalmars.D.bugs - [Issue 224] New: Incorrect warning "no return at end of function"

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=224

           Summary: Incorrect warning "no return at end of function"
           Product: D
           Version: 0.161
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Keywords: diagnostic, rejects-valid
          Severity: minor
          Priority: P3
         Component: DMD
        AssignedTo: bugzilla digitalmars.com
        ReportedBy: deewiant gmail.com


int main() {
        // or for (;;), or while (true), or do...while(true);
        if (true)
                return 0;
}

Such code generates (when compiled with -w) the warning "function module.main
no return at end of function".

But, of course, if allowed to compile, the function would return 0.


--
Jun 25 2006
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=224






With the simplistic flow analysis in D (read: virtually none), it can't tell
that the conditional is always taken.  That if statement might not be optimized
out until after the function "flow analysis" is done.  Which is why this is a
warning and not an error, or else it'd probably give the same warning for half
the functions that you write.  All it checks for is if the last statement of
the function is a return, and in this case, it isn't.


--
Jun 25 2006
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=224


bugzilla digitalmars.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED





Fixed dmd 1.032 and 2.016


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Jul 09 2008