1 // Copyright (C) 2023 The Android Open Source Project 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 { greeting: greeting.to_string() } 33 } 34 35 /// Returns the greeting as a string. 36 /// 37 /// # Examples 38 /// 39 /// ``` 40 /// use hello_lib::greeter::Greeter; 41 /// 42 /// let greeter = Greeter::new("Hello"); 43 /// let greeting = greeter.greeting("World"); 44 /// ``` greeting(&self, thing: &str) -> String45 pub fn greeting(&self, thing: &str) -> String { 46 format!("{} {}", &self.greeting, thing) 47 } 48 49 /// Prints the greeting. 50 /// 51 /// # Examples 52 /// 53 /// ``` 54 /// use hello_lib::greeter::Greeter; 55 /// 56 /// let greeter = Greeter::new("Hello"); 57 /// greeter.greet("World"); 58 /// ``` greet(&self, thing: &str)59 pub fn greet(&self, thing: &str) { 60 println!("{} {}", &self.greeting, thing); 61 } 62 } 63