nxt.minimal_fixed_array source code

1 module nxt.minimal_fixed_array;
2 
3 @safe:
4 
5 /** Minimalistic fixed-length (static) array of (`capacity`) number of elements
6  * of type `E` where length only fits in an `ubyte` for compact packing.
7  */
8 struct MinimalFixedArray(E, ubyte capacity)
9 {
10     @safe:
11 
12     this(in E[] es)
13     {
14         assert(es.length <= capacity,
15                "Length of input parameter `es` is larger than capacity "
16                ~ capacity.stringof);
17         _es[0 .. es.length] = es;
18         _length = cast(typeof(_length))es.length;
19     }
20 
21 private:
22     E[capacity] _es;
23     typeof(capacity) _length;
24 }
25 
26 @safe pure nothrow @nogc unittest
27 {
28     const ch7 = MinimalFixedArray!(char, 7)(`1234567`);
29     assert(ch7._es[] == `1234567`);
30 }