April 12, 2014 [Issue 12570] New: cast to template interface | ||||
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https://issues.dlang.org/show_bug.cgi?id=12570 Issue ID: 12570 Summary: cast to template interface Product: D Version: D2 Hardware: x86_64 OS: Windows Status: NEW Severity: normal Priority: P1 Component: DMD Assignee: nobody@puremagic.com Reporter: sigod.mail@gmail.com Consider this code: //////////////////////////////// import std.stdio; interface A {} interface B(T : A) : A {} class C_a : A {} class B_a : B!C_a {} void main() { B_a b = new B_a; B!A b_a = b; writeln(b_a); } //////////////////////////////// Compiler says: Error: cannot implicitly convert expression (b) of type B_a to B!(A).B Shouldn't it be allowed? However, explicit cast result in null. -- |
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