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November 26, 2011 [Issue 7015] New: ^^ and ^^= vector operations | ||||
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http://d.puremagic.com/issues/show_bug.cgi?id=7015 Summary: ^^ and ^^= vector operations Product: D Version: D2 Platform: All OS/Version: All Status: NEW Severity: enhancement Priority: P2 Component: druntime AssignedTo: nobody@puremagic.com ReportedBy: bearophile_hugs@eml.cc --- Comment #0 from bearophile_hugs@eml.cc 2011-11-25 17:05:12 PST --- While writing some D code that uses vectors and the desire to find distances among them, I'd like this vector operation to be supported: void main() { int[] a = [1, 2, 3]; int[] b = a[] ^^ 2; } DMD 2.057head gives: test.d(3): Error: Array operation a[] ^^ 2 not implemented -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- |
December 10, 2011 [Issue 7015] ^^ and ^^= vector operations | ||||
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Posted in reply to bearophile_hugs@eml.cc | http://d.puremagic.com/issues/show_bug.cgi?id=7015 Stewart Gordon <smjg@iname.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |smjg@iname.com --- Comment #1 from Stewart Gordon <smjg@iname.com> 2011-12-10 08:58:48 PST --- How, exactly, does this differ from (marked fixed) issue 3661? -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- |
December 10, 2011 [Issue 7015] ^^ and ^^= vector operations | ||||
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Posted in reply to bearophile_hugs@eml.cc | http://d.puremagic.com/issues/show_bug.cgi?id=7015 --- Comment #2 from bearophile_hugs@eml.cc 2011-12-10 10:36:52 PST --- (In reply to comment #1) > How, exactly, does this differ from (marked fixed) issue 3661? Thank you Stewart, you are right. Vector pow is already implemented: import std.math, std.stdio; void main() { int[3] a = [1, 2, 3]; int[3] b; b = a[] ^^ 2; writeln(b); a[] ^^= 2; writeln(a, " ", b); } So this is a: 1) A diagnostic bug, because the error message is misleading. 2) It shows a more general design problem with vector operations, because code like this too is refused with a similar error message: void main() { int[] a = [1, 2, 3]; int[] b = a[] + 2; } Vector ops require the memory needed to store the result to be already present. I don't know if this will change. What do you suggest to do with this bug report, to close it? -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- |
December 11, 2011 [Issue 7015] Allow vector operations into newly declared array | ||||
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Posted in reply to bearophile_hugs@eml.cc | http://d.puremagic.com/issues/show_bug.cgi?id=7015 Stewart Gordon <smjg@iname.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |diagnostic, spec Summary|^^ and ^^= vector |Allow vector operations |operations |into newly declared array --- Comment #3 from Stewart Gordon <smjg@iname.com> 2011-12-10 17:18:34 PST --- So the language currently doesn't allow vector ops into a newly declared array. So this is really two things: (a) as you say, a diagnostic bug, as the error message when you try to do it is bogus (b) a language feature request to allow this code I'm guessing (a) and (b) need to be filed as two separate issues. But meanwhile, I'm changing the summary line so that it at least makes sense. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- |
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