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    // Copyright 2018 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.

    #[doc(keyword = "fn")]
    //
    /// The `fn` keyword.
    ///
    /// The `fn` keyword is used to declare a function.
    ///
    /// Example:
    ///
    /// ```rust
    /// fn some_function() {
    ///     // code goes in here
    /// }
    /// ```
    ///
    /// For more information about functions, take a look at the [Rust Book][book].
    ///
    /// [book]: https://doc.rust-lang.org/book/second-edition/ch03-03-how-functions-work.html
    mod fn_keyword { }

    #[doc(keyword = "let")]
    //
    /// The `let` keyword.
    ///
    /// The `let` keyword is used to declare a variable.
    ///
    /// Example:
    ///
    /// ```rust
    /// # #![allow(unused_assignments)]
    /// let x = 3; // We create a variable named `x` with the value `3`.
    /// ```
    ///
    /// By default, all variables are **not** mutable. If you want a mutable variable,
    /// you'll have to use the `mut` keyword.
    ///
    /// Example:
    ///
    /// ```rust
    /// # #![allow(unused_assignments)]
    /// let mut x = 3; // We create a mutable variable named `x` with the value `3`.
    ///
    /// x += 4; // `x` is now equal to `7`.
    /// ```
    ///
    /// For more information about the `let` keyword, take a look at the [Rust Book][book].
    ///
    /// [book]: https://doc.rust-lang.org/book/second-edition/ch03-01-variables-and-mutability.html
    mod let_keyword { }

    #[doc(keyword = "struct")]
    //
    /// The `struct` keyword.
    ///
    /// The `struct` keyword is used to define a struct type.
    ///
    /// Example:
    ///
    /// ```
    /// struct Foo {
    ///     field1: u32,
    ///     field2: String,
    /// }
    /// ```
    ///
    /// There are different kinds of structs. For more information, take a look at the
    /// [Rust Book][book].
    ///
    /// [book]: https://doc.rust-lang.org/book/second-edition/ch05-01-defining-structs.html
    mod struct_keyword { }

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