digitalmars.D.learn - cast question
- "Dan" <dbdavidson yahoo.com> Oct 31 2012
- "Tobias Pankrath" <tobias pankrath.net> Oct 31 2012
- "Dan" <dbdavidson yahoo.com> Oct 31 2012
- "Tobias Pankrath" <tobias pankrath.net> Oct 31 2012
Why do the commented out calls to goo fail?
Thanks
Dan
-------------------------------------
import std.stdio;
struct S {
}
void goo(const ref S s) {
writeln(s);
}
struct T {
S s;
void foo(const ref T other) const {
goo(s);
// Error: function fdsaf.goo (ref const(S) s) is
// not callable using argument types (S)
// goo(cast(S)s);
// goo(cast()s); // same error
writeln(typeid(S), " ", typeid(s), " ",
typeid(cast()s), " ", typeid(cast(S)s));
}
}
void main() {
T t;
t.foo(t);
const S s1;
S s2;
goo(s1);
goo(s2);
goo(cast(S) s2);
// goo(cast(S) s1); Also fails
}
Oct 31 2012
On Wednesday, 31 October 2012 at 16:59:14 UTC, Dan wrote:Why do the commented out calls to goo fail? Thanks Dan
Compiles fine with git-head.
Oct 31 2012
On Wednesday, 31 October 2012 at 17:11:47 UTC, Tobias Pankrath wrote:On Wednesday, 31 October 2012 at 16:59:14 UTC, Dan wrote:Why do the commented out calls to goo fail? Thanks Dan
Compiles fine with git-head.
I did git clone: git clone https://github.com/D-Programming-Language/dmd.git The top of history is: ----- Commits in HEAD 1e720552 * origin/master origin/HEAD master | Author: Walter Bright <walter walterbright.com> | Date: Wed Oct 31 02:33:17 2012 -0700 ----- Then I built only dmd per instructions here http://xtzgzorex.wordpress.com/2011/07/31/d-building-dmd-and-phobos-on-linux/ dmd -v DMD64 D Compiler v2.061 I assume that is all that is necessary. I ran this dmd on the code (with comments removed of course) and got the same error: dmd -g -w -property /.../tmp/fdsaf.d /.../tmp/fdsaf.d(11): Error: function fdsaf.goo (ref const(S) s) is not callable using argument types (S) /.../tmp/fdsaf.d(12): Error: function fdsaf.goo (ref const(S) s) is not callable using argument types (S) /.../tmp/fdsaf.d(26): Error: function fdsaf.goo (ref const(S) s) is not callable using argument types (S) Any suggestions? Thanks Dan
Oct 31 2012
Ah, okay. I just dumped it into a file and ran dmd before leaving the office. This looks like a compiler bug to me. The struct should be implicitly convertable to const(S)
Oct 31 2012









"Tobias Pankrath" <tobias pankrath.net> 