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Bug 18835 – [REG 2.064] to!string doesnt work on enum member starting with two underscores

Status: RESOLVED
Resolution: INVALID
Severity: normal
Priority: P1
Component: phobos
Product: D
Version: D2
Platform: All
OS: All
Creation time: 2018-05-06T18:18:26Z
Last change time: 2018-05-06T18:41:55Z
Assigned to: No Owner
Creator: Basile-z

Comments

Comment #0 by b2.temp — 2018-05-06T18:18:26Z

test case: void main() { import std.conv : to; enum A{_a, __a} assert(to!string(cast(A) 0) == "_a"); // OK assert(to!string(cast(A) 1) == "__a"); // fails }

Comment #1 by b2.temp — 2018-05-06T18:34:35Z

It's because __traits(allMembers) seems to ignore members starting with double underscores. It's used in the std.format.formatValueImpl overload specialized for enums.

Comment #2 by b2.temp — 2018-05-06T18:41:55Z

Such identifiers are reserved so i suppose that allMembers filters them out on purpose.