[Issue 19854] New: Code stops Compiling when removing pragma(msg, | probably related to UDAs on enums

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19854

          Issue ID: 19854
           Summary: Code stops Compiling when removing pragma(msg, |
                    probably related to UDAs on enums
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: puremagic at zoadian.de

import std.stdio;
import std.meta;
import std.traits;
import std.conv;

struct UI_LABEL {
        string label;
}

enum isEnum(e) = is(e == enum);

enum Type {
        @UI_LABEL("Hans") type_hans,
        @UI_LABEL("Peter") type_peter,
}

struct Node {
        Type type;
}

string generateUI(NODE)(NODE node) {
        string ret;

        static foreach(i, P; NODE.tupleof) {{
                static if(isEnum!(typeof(P))) {
                        ret ~= ", combo[";
                        static foreach(o, O; EnumMembers!(typeof(P))) {
                                ret ~= O.to!string;

                //**********************************************
                // ADD THIS LINE AND IT COMPILES JUST FINE              
                                 //pragma(msg, __traits(getAttributes,
EnumMembers!(typeof(P))[o]));

                //**********************************************

                                static foreach(UDA;
getUDAs!(EnumMembers!(typeof(P))[o], UI_LABEL)) {
                                        ret ~= ", label = "
~UDA.label.to!string;
                                }

                                ret ~= " | ";
                        }
                        ret ~= "]";
                }

                ret ~= "\n";
        }}

        return ret;
}

void main() {
        import std.stdio;
        Node node;
        node.generateUI().writeln;
}

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