[Issue 5442] New: std.algorithm.sort problem with struct with char[10]
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Mon Jan 10 10:44:58 PST 2011
http://d.puremagic.com/issues/show_bug.cgi?id=5442
Summary: std.algorithm.sort problem with struct with char[10]
Product: D
Version: D2
Platform: x86
OS/Version: Windows
Status: NEW
Keywords: rejects-valid
Severity: normal
Priority: P2
Component: Phobos
AssignedTo: nobody at puremagic.com
ReportedBy: bearophile_hugs at eml.cc
--- Comment #0 from bearophile_hugs at eml.cc 2011-01-10 10:43:13 PST ---
This D2 program tries to sort in-place a dynamic array of Foo according to just
the first int x field (the third sort works on the whole structs), but when T
is a char the program doesn't compile:
import std.algorithm: sort, schwartzSort;
alias char T; // doesn't work
//alias int T; // works
struct Foo {
int x;
T[10] a;
}
void main() {
auto array = new Foo[10];
sort!("a.x > b.x")(array);
static bool myComp(Foo f1, Foo f2) { return f1.x < f2.x; }
sort!(myComp)(array);
sort(array);
}
DMD 2.051 prints:
...\dmd\src\phobos\std\conv.d(99): Error: template std.conv.toImpl(T,S) if
(!implicitlyConverts!(S,T) && isSomeString!(T) && isInputRange!(Unqual!(S)) &&
isSomeChar!(ElementType!(S))) toImpl(T,S) if (!implicitlyConverts!(S,T) &&
isSomeString!(T) && isInputRange!(Unqual!(S)) && isSomeChar!(ElementType!(S)))
matches more than one template declaration,
...\dmd\src\phobos\std\conv.d(114):toImpl(T,S) if (!implicitlyConverts!(S,T) &&
isSomeString!(T) && isInputRange!(Unqual!(S)) && isSomeChar!(ElementType!(S)))
and ...\dmd\src\phobos\std\conv.d(224):toImpl(T,S) if (isStaticArray!(S))
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