digitalmars.D.bugs - [Issue 22870] New: __traits(parent) with opApply returns generated
- d-bugmail puremagic.com (45/45) Mar 11 2022 https://issues.dlang.org/show_bug.cgi?id=22870
https://issues.dlang.org/show_bug.cgi?id=22870 Issue ID: 22870 Summary: __traits(parent) with opApply returns generated delegate instead of lexical parent Product: D Version: D2 Hardware: All OS: All Status: NEW Severity: normal Priority: P1 Component: dmd Assignee: nobody puremagic.com Reporter: snarwin+bugzilla gmail.com As of DMD 2.099.0, the following program fails to compile: --- struct HasOpApply { int opApply(int delegate(int) dg) { if (int result = dg(0)) return result; return 0; } } void main() { foreach (x; 0 .. 1) { // ok static assert(__traits(identifier, __traits(parent, {})) == "main"); } foreach (x; HasOpApply()) { // error static assert(__traits(identifier, __traits(parent, {})) == "main"); } } --- The error is: --- onlineapp.d(21): Error: static assert: `"__foreachbody5" == "main"` is false --- This happens because __traits(parent) is evaluated after the compiler has transformed the foreach loop into a call to HasOpApply.opApply. --
Mar 11 2022