jcli.core.utils source code

1 module jcli.core.utils;
2 
3 import std.traits : Unqual;
4 
5 string toFlagsString(Flags)(Flags flags)
6 {
7 	import std.array;
8 	import std.bitmanip;
9 
10     alias ReadableFlags = Unqual!Flags;
11     
12     auto result = appender!string;
13     bool isFirst = true;
14  	foreach (bitIndex; flags.bitsSet)
15     {
16         Switch: switch (bitIndex)
17         {
18             default: assert(0);
19             static foreach (memberName; __traits(allMembers, ReadableFlags))
20             {
21                 static if (__traits(getMember, ReadableFlags, memberName).bitsSet.length == 1)
22                 {
23                     case __traits(getMember, ReadableFlags, memberName).bitsSet.front:
24                     {
25                         if (!isFirst)
26                             result ~= " | ";
27                         else
28                             isFirst = false;
29                         // result ~= ReadableFlags.stringof ~ "." ~ memberName;
30                         result ~= memberName;
31                         break Switch;
32                     }
33                 }
34             }
35         }
36     }
37     return result[];
38 }
39 
40 template FlagsHelpers(TFlags)
41 {
42     @safe nothrow @nogc pure const
43     {
44         bool doesNotHave(TFlags a, TFlags b)
45         {
46             return (a & b) != b;
47         }
48         bool has(TFlags a, TFlags b)
49         {
50             return (a & b) == b;
51         }
52         bool hasEither(TFlags a, TFlags b)
53         {
54             return (a & b) != 0;
55         }
56         bool doesNotHaveEither(TFlags a, TFlags b)
57         {
58             return (a & b) == 0;
59         }
60     }
61 }