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1a4d82fc JJ |
1 | // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
c34b1796 | 11 | |
1a4d82fc | 12 | #![feature(advanced_slice_patterns)] |
c34b1796 | 13 | #![feature(slice_patterns)] |
1a4d82fc | 14 | |
223e47cc | 15 | fn a() { |
85aaf69f | 16 | let x = [1]; |
223e47cc | 17 | match x { |
223e47cc | 18 | [a] => { |
970d7e83 | 19 | assert_eq!(a, 1); |
223e47cc | 20 | } |
223e47cc LB |
21 | } |
22 | } | |
23 | ||
24 | fn b() { | |
85aaf69f | 25 | let x = [1, 2, 3]; |
223e47cc | 26 | match x { |
1a4d82fc | 27 | [a, b, c..] => { |
970d7e83 LB |
28 | assert_eq!(a, 1); |
29 | assert_eq!(b, 2); | |
1a4d82fc JJ |
30 | let expected: &[_] = &[3]; |
31 | assert_eq!(c, expected); | |
223e47cc | 32 | } |
223e47cc LB |
33 | } |
34 | match x { | |
1a4d82fc JJ |
35 | [a.., b, c] => { |
36 | let expected: &[_] = &[1]; | |
37 | assert_eq!(a, expected); | |
970d7e83 LB |
38 | assert_eq!(b, 2); |
39 | assert_eq!(c, 3); | |
223e47cc | 40 | } |
223e47cc LB |
41 | } |
42 | match x { | |
1a4d82fc | 43 | [a, b.., c] => { |
970d7e83 | 44 | assert_eq!(a, 1); |
1a4d82fc JJ |
45 | let expected: &[_] = &[2]; |
46 | assert_eq!(b, expected); | |
970d7e83 | 47 | assert_eq!(c, 3); |
223e47cc | 48 | } |
223e47cc LB |
49 | } |
50 | match x { | |
51 | [a, b, c] => { | |
970d7e83 LB |
52 | assert_eq!(a, 1); |
53 | assert_eq!(b, 2); | |
54 | assert_eq!(c, 3); | |
223e47cc | 55 | } |
1a4d82fc JJ |
56 | } |
57 | } | |
58 | ||
3157f602 | 59 | |
3157f602 XL |
60 | fn b_slice() { |
61 | let x : &[_] = &[1, 2, 3]; | |
62 | match x { | |
63 | &[a, b, ref c..] => { | |
64 | assert_eq!(a, 1); | |
65 | assert_eq!(b, 2); | |
66 | let expected: &[_] = &[3]; | |
67 | assert_eq!(c, expected); | |
68 | } | |
69 | _ => unreachable!() | |
70 | } | |
71 | match x { | |
72 | &[ref a.., b, c] => { | |
73 | let expected: &[_] = &[1]; | |
74 | assert_eq!(a, expected); | |
75 | assert_eq!(b, 2); | |
76 | assert_eq!(c, 3); | |
77 | } | |
78 | _ => unreachable!() | |
79 | } | |
80 | match x { | |
81 | &[a, ref b.., c] => { | |
82 | assert_eq!(a, 1); | |
83 | let expected: &[_] = &[2]; | |
84 | assert_eq!(b, expected); | |
85 | assert_eq!(c, 3); | |
86 | } | |
87 | _ => unreachable!() | |
88 | } | |
89 | match x { | |
90 | &[a, b, c] => { | |
91 | assert_eq!(a, 1); | |
92 | assert_eq!(b, 2); | |
93 | assert_eq!(c, 3); | |
94 | } | |
95 | _ => unreachable!() | |
96 | } | |
97 | } | |
98 | ||
1a4d82fc | 99 | fn c() { |
85aaf69f | 100 | let x = [1]; |
1a4d82fc JJ |
101 | match x { |
102 | [2, ..] => panic!(), | |
103 | [..] => () | |
104 | } | |
105 | } | |
106 | ||
107 | fn d() { | |
85aaf69f | 108 | let x = [1, 2, 3]; |
1a4d82fc | 109 | let branch = match x { |
85aaf69f SL |
110 | [1, 1, ..] => 0, |
111 | [1, 2, 3, ..] => 1, | |
112 | [1, 2, ..] => 2, | |
1a4d82fc JJ |
113 | _ => 3 |
114 | }; | |
115 | assert_eq!(branch, 1); | |
116 | } | |
117 | ||
118 | fn e() { | |
c34b1796 | 119 | let x: &[isize] = &[1, 2, 3]; |
3157f602 XL |
120 | let a = match *x { |
121 | [1, 2] => 0, | |
122 | [..] => 1, | |
123 | }; | |
124 | ||
125 | assert_eq!(a, 1); | |
126 | ||
127 | let b = match *x { | |
128 | [2, ..] => 0, | |
129 | [1, 2, ..] => 1, | |
130 | [_] => 2, | |
131 | [..] => 3 | |
132 | }; | |
133 | ||
134 | assert_eq!(b, 1); | |
135 | ||
136 | ||
137 | let c = match *x { | |
138 | [_, _, _, _, ..] => 0, | |
139 | [1, 2, ..] => 1, | |
140 | [_] => 2, | |
141 | [..] => 3 | |
142 | }; | |
143 | ||
144 | assert_eq!(c, 1); | |
223e47cc LB |
145 | } |
146 | ||
c30ab7b3 SL |
147 | fn f() { |
148 | let x = &[1, 2, 3, 4, 5]; | |
149 | let [a, [b, [c, ..].., d].., e] = *x; | |
150 | assert_eq!((a, b, c, d, e), (1, 2, 3, 4, 5)); | |
151 | ||
152 | let x: &[isize] = x; | |
153 | let (a, b, c, d, e) = match *x { | |
154 | [a, [b, [c, ..].., d].., e] => (a, b, c, d, e), | |
155 | _ => unimplemented!() | |
156 | }; | |
157 | ||
158 | assert_eq!((a, b, c, d, e), (1, 2, 3, 4, 5)); | |
159 | } | |
160 | ||
223e47cc LB |
161 | pub fn main() { |
162 | a(); | |
163 | b(); | |
3157f602 | 164 | b_slice(); |
1a4d82fc JJ |
165 | c(); |
166 | d(); | |
167 | e(); | |
c30ab7b3 | 168 | f(); |
223e47cc | 169 | } |