[Issue 4030] New: Better object array literal type inference
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Tue Mar 30 02:59:09 PDT 2010
http://d.puremagic.com/issues/show_bug.cgi?id=4030
Summary: Better object array literal type inference
Product: D
Version: future
Platform: All
OS/Version: All
Status: NEW
Severity: enhancement
Priority: P2
Component: DMD
AssignedTo: nobody at puremagic.com
ReportedBy: bearophile_hugs at eml.cc
--- Comment #0 from bearophile_hugs at eml.cc 2010-03-30 02:59:07 PDT ---
In the following D2 program the compiler can refuse the line 6, because it must
refuse to guess (if p1 is an array of A or B).
But at line 7 the compiler has enough information to not guess (it's an array
of A), so line 7 can be accepted by the compiler:
class A {}
class B : A {}
final class C1 : B {}
final class C2 : B {}
void main() {
auto p1 = [new C1, new C2]; // line 6, don't guess
A[] p2 = [new C1, new C2]; // line 7, no need to guess
}
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