[Issue 7489] New: A problem map on AA.byKey()
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Sun Feb 12 12:19:40 PST 2012
http://d.puremagic.com/issues/show_bug.cgi?id=7489
Summary: A problem map on AA.byKey()
Product: D
Version: D2
Platform: x86
OS/Version: Windows
Status: NEW
Severity: normal
Priority: P2
Component: DMD
AssignedTo: nobody at puremagic.com
ReportedBy: bearophile_hugs at eml.cc
--- Comment #0 from bearophile_hugs at eml.cc 2012-02-12 12:19:39 PST ---
I don't understand what's happening here, sorry.
This isn't a fully minimized test case.
This program compiles (DMD 2.058beta2), with the first call to foo() commented
out:
import std.algorithm, std.typecons;
void foo(T, U)(T[U] aa) {
map!(x => Tuple!U(x))(aa.byKey());
}
void main() {
int[char] aa1;
//foo(aa1);
int[int] aa2;
foo(aa2);
}
If I comment out the second call to foo() it compiles still:
import std.algorithm, std.typecons;
void foo(T, U)(T[U] aa) {
map!(x => Tuple!U(x))(aa.byKey());
}
void main() {
int[char] aa1;
foo(aa1);
int[int] aa2;
//foo(aa2);
}
But the whole program doesn't compile:
import std.algorithm, std.typecons;
void foo(T, U)(T[U] aa) {
map!(x => Tuple!U(x))(aa.byKey());
}
void main() {
int[char] aa1;
foo(aa1);
int[int] aa2;
foo(aa2);
}
DMD 2.058beta2 gives:
...\dmd2\src\phobos\std\typecons.d(379): Error: cannot implicitly convert
expression (_param_0) of type int to char
test.d(3): Error: template instance
std.typecons.Tuple!(char).Tuple.__ctor!(int) error instantiating
...\dmd2\src\phobos\std\algorithm.d(382): instantiated from here:
__lambda2!(int)
test.d(3): instantiated from here: map!(Result)
test.d(9): instantiated from here: foo!(int,int)
...\dmd2\src\phobos\std\algorithm.d(382): Error: template instance
test.foo!(int,char).foo.__lambda2!(int) error instantiating
test.d(3): instantiated from here: map!(Result)
test.d(9): instantiated from here: foo!(int,int)
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