digitalmars.D.bugs - [Issue 1262] New: Local variable of struct type initialized by literal resets when compared to .init
- d-bugmail puremagic.com (49/49) Jun 08 2007 http://d.puremagic.com/issues/show_bug.cgi?id=1262
- d-bugmail puremagic.com (4/4) Jun 12 2007 http://d.puremagic.com/issues/show_bug.cgi?id=1262
- d-bugmail puremagic.com (11/12) Jun 12 2007 http://d.puremagic.com/issues/show_bug.cgi?id=1262
- d-bugmail puremagic.com (4/4) Jun 12 2007 http://d.puremagic.com/issues/show_bug.cgi?id=1262
- d-bugmail puremagic.com (9/9) Jun 27 2007 http://d.puremagic.com/issues/show_bug.cgi?id=1262
- d-bugmail puremagic.com (8/8) Jul 24 2007 http://d.puremagic.com/issues/show_bug.cgi?id=1262
- d-bugmail puremagic.com (9/9) Oct 15 2013 http://d.puremagic.com/issues/show_bug.cgi?id=1262
http://d.puremagic.com/issues/show_bug.cgi?id=1262 Summary: Local variable of struct type initialized by literal resets when compared to .init Product: D Version: 1.014 Platform: PC OS/Version: Linux Status: NEW Keywords: wrong-code Severity: normal Priority: P2 Component: DMD AssignedTo: bugzilla digitalmars.com ReportedBy: fvbommel wxs.nl (First seen in a message posted by "HATA" to d.D.bugs, http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D.bugs&article_id=11355) --- import std.stdio; struct A { int v; } void main() { A a = A(10); writefln("Before test 1: ", a.v); if (a == a.init) writefln(a.v,"(a==a.init)"); else writefln(a.v,"(a!=a.init)"); a.v = 100; writefln("Before test 2: ", a.v); if (a == a.init) writefln(a.v,"(a==a.init)"); else writefln(a.v,"(a!=a.init)"); a = A(1000); writefln("Before test 3: ", a.v); if (a == a.init) writefln(a.v,"(a==a.init)"); else writefln(a.v,"(a!=a.init)"); } --- Even though the value of a.v is not 10 before the last two if statements, it gets set to 10 right before the test. This doesn't happen if 'a' is a global variable, or if a static opCall(int) with traditional implementation is added. So this is a workaround: --- struct A { int v; static A opCall(int x) { A result; result.v = x; return result; } } --- --
Jun 08 2007
http://d.puremagic.com/issues/show_bug.cgi?id=1262 umm, struct literals should not be l-value --
Jun 12 2007
http://d.puremagic.com/issues/show_bug.cgi?id=1262umm, struct literals should not be l-valueAnd your point is? At no point in the code is a struct literal used as an l-value. There's a struct variable initialized _by_ a struct literal, and a struct literal being assigned to a variable, but those are the only struct literals used. And those operations should only copy the value of the struct literal to the variable being initialized, which should be perfectly fine. Structs are value types, not reference types. --
Jun 12 2007
http://d.puremagic.com/issues/show_bug.cgi?id=1262 heh, you are right. Literal things screw up in my mind --
Jun 12 2007
http://d.puremagic.com/issues/show_bug.cgi?id=1262 bugzilla digitalmars.com changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED Fixed dmd 2.001, 1.017 --
Jun 27 2007
http://d.puremagic.com/issues/show_bug.cgi?id=1262 Added to DStress as http://dstess.kuehne.cn/run/i/init_06_A.d http://dstess.kuehne.cn/run/i/init_06_B.d http://dstess.kuehne.cn/run/i/init_06_C.d http://dstess.kuehne.cn/run/i/init_06_D.d --
Jul 24 2007
http://d.puremagic.com/issues/show_bug.cgi?id=1262 Commit pushed to master at https://github.com/D-Programming-Language/phobos https://github.com/D-Programming-Language/phobos/commit/8f00475ef27cd6382500b8296ae7f23ed3c8fe16 too tight constraint that has no use in private function Fixes issue 1262 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Oct 15 2013