rt.adi source code

1 /**
2  * Implementation of dynamic array property support routines.
3  *
4  * Copyright: Copyright Digital Mars 2000 - 2015.
5  * License: Distributed under the
6  *      $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0).
7  *    (See accompanying file LICENSE)
8  * Authors:   Walter Bright
9  * Source: $(DRUNTIMESRC rt/_adi.d)
10  */
11 
12 module rt.adi;
13 
14 //debug=adi;            // uncomment to turn on debugging printf's
15 
16 private
17 {
18     debug(adi) import core.stdc.stdio;
19 }
20 
21 /***************************************
22  * Support for array equality test.
23  * Returns:
24  *      1       equal
25  *      0       not equal
26  */
27 
28 extern (C) int _adEq2(void[] a1, void[] a2, TypeInfo ti)
29 {
30     debug(adi) printf("_adEq2(a1.length = %d, a2.length = %d)\n", a1.length, a2.length);
31     if (a1.length != a2.length)
32         return 0;               // not equal
33     if (!ti.equals(&a1, &a2))
34         return 0;
35     return 1;
36 }
37 
38 @safe unittest
39 {
40     debug(adi) printf("array.Eq unittest\n");
41 
42     struct S(T) { T val; }
43     alias String = S!string;
44     alias Float = S!float;
45 
46     String[1] a = [String("hello"c)];
47 
48     assert(a != [String("hel")]);
49     assert(a != [String("helloo")]);
50     assert(a != [String("betty")]);
51     assert(a == [String("hello")]);
52     assert(a != [String("hxxxx")]);
53 
54     Float[1] fa = [Float(float.nan)];
55     assert(fa != fa);
56 }
57 
58 unittest
59 {
60     debug(adi) printf("struct.Eq unittest\n");
61 
62     static struct TestStruct
63     {
64         int value;
65 
66         bool opEquals(const TestStruct rhs) const
67         {
68             return value == rhs.value;
69         }
70     }
71 
72     TestStruct[] b = [TestStruct(5)];
73     TestStruct[] c = [TestStruct(6)];
74     assert(_adEq2(*cast(void[]*)&b, *cast(void[]*)&c, typeid(TestStruct[])) == false);
75     assert(_adEq2(*cast(void[]*)&b, *cast(void[]*)&b, typeid(TestStruct[])) == true);
76 }