1 // Copyright 2015 The Bazel Authors. All rights reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 /// Object that displays a greeting. 16 pub struct Greeter { 17 greeting: String, 18 } 19 20 /// Implementation of Greeter. 21 impl Greeter { 22 /// Constructs a new `Greeter`. 23 /// 24 /// # Examples 25 /// 26 /// ``` 27 /// use hello_lib::greeter::Greeter; 28 /// 29 /// let greeter = Greeter::new("Hello"); 30 /// ``` new(greeting: &str) -> Greeter31 pub fn new(greeting: &str) -> Greeter { 32 Greeter { 33 greeting: greeting.to_string(), 34 } 35 } 36 37 /// Returns the greeting as a string. 38 /// 39 /// # Examples 40 /// 41 /// ``` 42 /// use hello_lib::greeter::Greeter; 43 /// 44 /// let greeter = Greeter::new("Hello"); 45 /// let greeting = greeter.greeting("World"); 46 /// ``` greeting(&self, thing: &str) -> String47 pub fn greeting(&self, thing: &str) -> String { 48 format!("{} {}", &self.greeting, thing) 49 } 50 51 /// Prints the greeting. 52 /// 53 /// # Examples 54 /// 55 /// ``` 56 /// use hello_lib::greeter::Greeter; 57 /// 58 /// let greeter = Greeter::new("Hello"); 59 /// greeter.greet("World"); 60 /// ``` greet(&self, thing: &str)61 pub fn greet(&self, thing: &str) { 62 println!("{} {}", &self.greeting, thing); 63 } 64 } 65 66 #[cfg(test)] 67 mod test { 68 use super::Greeter; 69 70 #[test] test_greeting()71 fn test_greeting() { 72 let hello = Greeter::new("Hi"); 73 assert_eq!("Hi Rust", hello.greeting("Rust")); 74 } 75 } 76