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August 01, 2014 [Issue 12893] Cannot create a SortedRange from inout array | ||||
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https://issues.dlang.org/show_bug.cgi?id=12893 briancschott@gmail.com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |briancschott@gmail.com --- Comment #1 from briancschott@gmail.com --- Related: import std.algorithm; import std.stdio; struct S { void x() inout { writeln(y.map!(a => a + 1)); } int[] y; } void main() { const S s; s.x(); } /usr/include/dmd/phobos/std/algorithm.d(474): Error: variable test.S.x.MapResult!(__lambda1, inout(int)[]).MapResult._input only parameters or stack based variables can be inout /usr/include/dmd/phobos/std/algorithm.d(427): Error: template instance test.S.x.MapResult!(__lambda1, inout(int)[]) error instantiating test.d(6): instantiated from here: map!(inout(int)[]) Failed: ["dmd", "-v", "-o-", "test.d", "-I."] -- |
February 10, 2016 [Issue 12893] Cannot create a SortedRange from inout array | ||||
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https://issues.dlang.org/show_bug.cgi?id=12893 Lars T. Kyllingstad <bugzilla@kyllingen.net> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |spec CC| |bugzilla@kyllingen.net Component|phobos |dmd Hardware|x86 |All OS|Windows |All --- Comment #2 from Lars T. Kyllingstad <bugzilla@kyllingen.net> --- I think these are problems with the design of 'inout' rather than with Phobos. Perhaps it could be worked around with careful use of std.typecons.Unqual, but that seems unfeasible to do, as there are *a lot* of types that have this problem. (Almost all ranges, for example, at least the ones that have internal caching.) Therefore, I'm recategorising this as a DMD/spec issue. Here's a test case that doesn't involve Phobos: struct Ptr(T) { T* ptr; alias ptr this; } Ptr!T takePtr(T)(ref T obj) { return Ptr!T(&obj); } inout(int[]) fun(inout int[] arr) { auto p = takePtr(arr); return *p; } I wonder if we could invent a rule by which inout gets converted to const in some places. -- |
December 17, 2022 [Issue 12893] Cannot create a SortedRange from inout array | ||||
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https://issues.dlang.org/show_bug.cgi?id=12893 Iain Buclaw <ibuclaw@gdcproject.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P1 |P3 -- |
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