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March 19, 2014 [Issue 12407] New: reduce cannot deduce argument types | ||||
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https://d.puremagic.com/issues/show_bug.cgi?id=12407 Summary: reduce cannot deduce argument types Product: D Version: D2 Platform: All OS/Version: All Status: NEW Severity: normal Priority: P2 Component: DMD AssignedTo: nobody@puremagic.com ReportedBy: lt.infiltrator@gmail.com --- Comment #0 from Infiltrator <lt.infiltrator@gmail.com> 2014-03-18 18:19:12 PDT --- http://dpaste.dzfl.pl/f2d178081ee8 ----------------------------------------------------------- import std.algorithm : map, reduce; class A { long fun() { return 1 + sub.map!(s => s.fun()).reduce!((a, b) => a + b)(0L); } A[] sub; } void main() { } ---------------------------------------------------------- Fails to compile: /d414/f619.d(5): Error: template std.algorithm.reduce cannot deduce function from argument types !((a, b) => a + b)(MapResult!(__lambda1, A[]), long), candidates are: /opt/compilers/dmd2/include/std/algorithm.d(701): std.algorithm.reduce(fun...) if (fun.length >= 1) -- Configure issuemail: https://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- |
March 19, 2014 [Issue 12407] reduce cannot deduce argument types | ||||
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Posted in reply to Infiltrator | https://d.puremagic.com/issues/show_bug.cgi?id=12407 bearophile_hugs@eml.cc changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED CC| |bearophile_hugs@eml.cc Resolution| |INVALID --- Comment #1 from bearophile_hugs@eml.cc 2014-03-18 18:35:14 PDT --- I think this is an invalid issue. reduce currently takes as first argument the seed and as second the range. This is the correct code: return 1 + reduce!((a, b) => a + b)(0L, sub.map!(s => s.fun)); There are plans in fixing reduce. Also voting your own entry, and doing it twice, is not so good :-) -- Configure issuemail: https://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- |
March 19, 2014 [Issue 12407] reduce cannot deduce argument types | ||||
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Posted in reply to Infiltrator | https://d.puremagic.com/issues/show_bug.cgi?id=12407 --- Comment #2 from Infiltrator <lt.infiltrator@gmail.com> 2014-03-18 18:40:50 PDT --- Of course. I keep forgetting about that with reduce. As for the voting, I use it to keep track of issues (I don't see a bookmark or similar option), and I just spread my votes out evenly. -- Configure issuemail: https://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- |
March 19, 2014 [Issue 12407] reduce cannot deduce argument types | ||||
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Posted in reply to Infiltrator | https://d.puremagic.com/issues/show_bug.cgi?id=12407 --- Comment #3 from bearophile_hugs@eml.cc 2014-03-18 19:50:39 PDT --- (In reply to comment #2) > Of course. I keep forgetting about that with reduce. > > As for the voting, I use it to keep track of issues (I don't see a bookmark or similar option), and I just spread my votes out evenly. You can perform an advanced search, to find your own issues. -- Configure issuemail: https://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- |
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