是否可以在Rust中的不同源文件中使用模块

1 回答

• 10

  严格地说，您不能将一个模块拆分为不同的文件，但您不需要将子模块定义为类似的效果（这也是一个更好的解决方案） .

  你可以这样安排你的模块：

  src/app.rs
  src/logging/mod.rs // parent modules go into their own folder
  src/logging/logger.rs // child modules can stay with their parent
  src/logging/sql.rs
  

  以下是文件的外观

  SRC / app.rs

  mod logging;
  
  pub struct App;
  
  fn main() {
      let a = logging::Logger; // Ok
      let b = logging::Sql; // Error: didn't re-export Sql
  }
  

  SRC /记录/ mod.rs

  // `pub use ` re-exports these names
  //  This allows app.rs or other modules to import them.
  pub use self::logger::{Logger, LoggerTrait};
  use self::sql::{Sql, SqlTrait};
  use super::App; // imports App from the parent.
  
  mod logger;
  mod sql;
  
  fn test() {
      let a = Logger; // Ok
      let b = Sql; // Ok
  }
  
  struct Foo;
  
  // Ok
  impl SqlTrait for Foo {
      fn sql(&mut self, what: &str) {}
  }
  

  SRC /记录/ logger.rs

  pub struct Logger;
  
  pub trait LoggerTrait {
      fn log(&mut self, &str);
  }
  

  SRC /记录/ sql.rs

  pub struct Sql;
  
  pub trait SqlTrait {
      fn sql(&mut self, &str);
  }
  

  回复于 2024-05-15T20:36:14+08:00