| // Copyright 2013 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| |
| #![allow(unnecessary_allocation)] |
| |
| fn f1(ref_string: &str) -> String { |
| match ref_string { |
| "a" => "found a".to_string(), |
| "b" => "found b".to_string(), |
| _ => "not found".to_string() |
| } |
| } |
| |
| fn f2(ref_string: &str) -> String { |
| match ref_string { |
| "a" => "found a".to_string(), |
| "b" => "found b".to_string(), |
| s => format!("not found ({})", s) |
| } |
| } |
| |
| fn g1(ref_1: &str, ref_2: &str) -> String { |
| match (ref_1, ref_2) { |
| ("a", "b") => "found a,b".to_string(), |
| ("b", "c") => "found b,c".to_string(), |
| _ => "not found".to_string() |
| } |
| } |
| |
| fn g2(ref_1: &str, ref_2: &str) -> String { |
| match (ref_1, ref_2) { |
| ("a", "b") => "found a,b".to_string(), |
| ("b", "c") => "found b,c".to_string(), |
| (s1, s2) => format!("not found ({}, {})", s1, s2) |
| } |
| } |
| |
| pub fn main() { |
| assert_eq!(f1("b"), "found b".to_string()); |
| assert_eq!(f1("c"), "not found".to_string()); |
| assert_eq!(f1("d"), "not found".to_string()); |
| assert_eq!(f2("b"), "found b".to_string()); |
| assert_eq!(f2("c"), "not found (c)".to_string()); |
| assert_eq!(f2("d"), "not found (d)".to_string()); |
| assert_eq!(g1("b", "c"), "found b,c".to_string()); |
| assert_eq!(g1("c", "d"), "not found".to_string()); |
| assert_eq!(g1("d", "e"), "not found".to_string()); |
| assert_eq!(g2("b", "c"), "found b,c".to_string()); |
| assert_eq!(g2("c", "d"), "not found (c, d)".to_string()); |
| assert_eq!(g2("d", "e"), "not found (d, e)".to_string()); |
| } |