digitalmars.D.bugs - [Issue 5042] New: format("%s") of struct without toString
- d-bugmail puremagic.com (41/41) Oct 11 2010 http://d.puremagic.com/issues/show_bug.cgi?id=5042
- d-bugmail puremagic.com (10/10) Jan 09 2011 http://d.puremagic.com/issues/show_bug.cgi?id=5042
- d-bugmail puremagic.com (12/12) Apr 22 2012 http://d.puremagic.com/issues/show_bug.cgi?id=5042
- d-bugmail puremagic.com (11/11) Apr 22 2012 http://d.puremagic.com/issues/show_bug.cgi?id=5042
- d-bugmail puremagic.com (20/20) Apr 24 2012 http://d.puremagic.com/issues/show_bug.cgi?id=5042
- d-bugmail puremagic.com (16/20) Apr 24 2012 http://d.puremagic.com/issues/show_bug.cgi?id=5042
- d-bugmail puremagic.com (15/17) Apr 24 2012 http://d.puremagic.com/issues/show_bug.cgi?id=5042
http://d.puremagic.com/issues/show_bug.cgi?id=5042 Summary: format("%s") of struct without toString Product: D Version: D2 Platform: x86 OS/Version: Windows Status: NEW Keywords: rejects-valid Severity: normal Priority: P2 Component: Phobos AssignedTo: nobody puremagic.com ReportedBy: bearophile_hugs eml.cc Given a plain struct like Foo, the to!string creates a good enough textual representation of it: import std.conv: to; struct Foo { int x; } void main() { assert(to!string(Foo(1)) == "Foo(1)"); } A nomal writefln("%s") just prints "Foo": import std.stdio: writeln, writefln; struct Foo { int x; } void main() { writeln(Foo(1)); // ==> Foo writefln("%s", Foo(1)); // ==> Foo } But the format("%s") doesn't work: import std.string: format; struct Foo { int x; } void main() { assert(format("%s", Foo(1)) == "Foo(1)"); } DMD 2.049 gives the error: std.format.FormatError: std.format Can't convert test.Point to string: "string toString()" not defined I expect this format("%s") to return "Foo(1)" or "Foo" (I prefer "Foo(1)"). -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Oct 11 2010
http://d.puremagic.com/issues/show_bug.cgi?id=5042 Andrei Alexandrescu <andrei metalanguage.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED CC| |andrei metalanguage.com AssignedTo|nobody puremagic.com |andrei metalanguage.com -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Jan 09 2011
http://d.puremagic.com/issues/show_bug.cgi?id=5042 SomeDude <lovelydear mailmetrash.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |lovelydear mailmetrash.com PDT --- I don't know if the bug is that std.string.format doesn't work on everything or if it's the sketchy documentation, "Format arguments into a string.", which implies that it should work on everything without further explanations. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Apr 22 2012
http://d.puremagic.com/issues/show_bug.cgi?id=5042 Kenji Hara <k.hara.pg gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |DUPLICATE *** This issue has been marked as a duplicate of issue 6595 *** -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Apr 22 2012
http://d.puremagic.com/issues/show_bug.cgi?id=5042 In dmd 2.060alpha: import std.stdio: writeln, writefln; import std.string: format; struct Foo { int x; } void main() { writeln(Foo(1)); // ==> Foo(1) writefln("%s", Foo(1)); // ==> Foo(1) writeln(format("%s", Foo(1))); // run-time error } I see this error still: Foo(1) Foo(1) std.format.FormatException std\format.d(4749): Can't convert test.Foo to string: "string toString()" not defined If it's isn't a problem in just my DMD, then I'll reopen this issue... -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Apr 24 2012
http://d.puremagic.com/issues/show_bug.cgi?id=5042In dmd 2.060alpha:[snip]If it's isn't a problem in just my DMD, then I'll reopen this issue...std.string.format function only support TypeInfo based formatting. Then it never supports raw field based, and alias this based formatting. As discussed here: https://github.com/D-Programming-Language/phobos/pull/231 For the backward compatibility, we cannot change the implementation of std.string.format function. Instead, in 2.060head, we add a xformat function that uses std.format.formattedWrite function as the implementation. After all, you should use std.string.xformat instead of std.string.format in 2.060 and later. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Apr 24 2012
http://d.puremagic.com/issues/show_bug.cgi?id=5042After all, you should use std.string.xformat instead of std.string.format in 2.060 and later.Thank you Hara, this works: import std.stdio: writeln, writefln; import std.string: xformat; struct Foo { int x; } void main() { writeln(Foo(1)); // ==> Foo(1) writefln("%s", Foo(1)); // ==> Foo(1) writeln(xformat("%s", Foo(1))); // ==> Foo(1) } -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Apr 24 2012