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.
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.
11 fn match_vecs<'a, T>(l1: &'a [T], l2: &'a [T]) -> &'static str {
13 ([], []) => "both empty",
14 ([], [..]) | ([..], []) => "one empty",
15 ([..], [..]) => "both non-empty"
19 fn match_vecs_cons<'a, T>(l1: &'a [T], l2: &'a [T]) -> &'static str {
21 ([], []) => "both empty",
22 ([], [_, ..]) | ([_, ..], []) => "one empty",
23 ([_, ..], [_, ..]) => "both non-empty"
27 fn match_vecs_snoc<'a, T>(l1: &'a [T], l2: &'a [T]) -> &'static str {
29 ([], []) => "both empty",
30 ([], [.., _]) | ([.., _], []) => "one empty",
31 ([.., _], [.., _]) => "both non-empty"
35 fn match_nested_vecs_cons<'a, T>(l1: Option<&'a [T]>, l2: Result<&'a [T], ()>) -> &'static str {
37 (Some([]), Ok([])) => "Some(empty), Ok(empty)",
38 (Some([_, ..]), Ok(_)) | (Some([_, ..]), Err(())) => "Some(non-empty), any",
39 (None, Ok([])) | (None, Err(())) | (None, Ok([_])) => "None, Ok(less than one element)",
40 (None, Ok([_, _, ..])) => "None, Ok(at least two elements)",
45 fn match_nested_vecs_snoc<'a, T>(l1: Option<&'a [T]>, l2: Result<&'a [T], ()>) -> &'static str {
47 (Some([]), Ok([])) => "Some(empty), Ok(empty)",
48 (Some([.., _]), Ok(_)) | (Some([.., _]), Err(())) => "Some(non-empty), any",
49 (None, Ok([])) | (None, Err(())) | (None, Ok([_])) => "None, Ok(less than one element)",
50 (None, Ok([.., _, _])) => "None, Ok(at least two elements)",
56 assert_eq!(match_vecs(&[1i, 2], &[2i, 3]), "both non-empty");
57 assert_eq!(match_vecs(&[], &[1i, 2, 3, 4]), "one empty");
58 assert_eq!(match_vecs::<uint>(&[], &[]), "both empty");
59 assert_eq!(match_vecs(&[1i, 2, 3], &[]), "one empty");
61 assert_eq!(match_vecs_cons(&[1i, 2], &[2i, 3]), "both non-empty");
62 assert_eq!(match_vecs_cons(&[], &[1i, 2, 3, 4]), "one empty");
63 assert_eq!(match_vecs_cons::<uint>(&[], &[]), "both empty");
64 assert_eq!(match_vecs_cons(&[1i, 2, 3], &[]), "one empty");
66 assert_eq!(match_vecs_snoc(&[1i, 2], &[2i, 3]), "both non-empty");
67 assert_eq!(match_vecs_snoc(&[], &[1i, 2, 3, 4]), "one empty");
68 assert_eq!(match_vecs_snoc::<uint>(&[], &[]), "both empty");
69 assert_eq!(match_vecs_snoc(&[1i, 2, 3], &[]), "one empty");
71 assert_eq!(match_nested_vecs_cons(None, Ok(&[4u, 2u])), "None, Ok(at least two elements)");
72 assert_eq!(match_nested_vecs_cons::<uint>(None, Err(())), "None, Ok(less than one element)");
73 assert_eq!(match_nested_vecs_cons::<bool>(Some(&[]), Ok(&[])), "Some(empty), Ok(empty)");
74 assert_eq!(match_nested_vecs_cons(Some(&[1i]), Err(())), "Some(non-empty), any");
75 assert_eq!(match_nested_vecs_cons(Some(&[(42i, ())]), Ok(&[(1i, ())])), "Some(non-empty), any");
77 assert_eq!(match_nested_vecs_snoc(None, Ok(&[4u, 2u])), "None, Ok(at least two elements)");
78 assert_eq!(match_nested_vecs_snoc::<uint>(None, Err(())), "None, Ok(less than one element)");
79 assert_eq!(match_nested_vecs_snoc::<bool>(Some(&[]), Ok(&[])), "Some(empty), Ok(empty)");
80 assert_eq!(match_nested_vecs_snoc(Some(&[1i]), Err(())), "Some(non-empty), any");
81 assert_eq!(match_nested_vecs_snoc(Some(&[(42i, ())]), Ok(&[(1i, ())])), "Some(non-empty), any");