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/// # 模块 /// /// 本章相关包: /// /// - static_hashmap /// - static_hashmap_2015 /// - static_hashmap_2018 /// - csv_challenge /// /// 请参考本书随书GitHub仓库相关源码 /// /// Basic usage: 模块可见性 Rust 2015 Edtion /// /// ``` /// pub mod outer_mod { /// pub(self) fn outer_mod_fn() {} /// pub mod inner_mod { /// // use outer_mod::outer_mod_fn; /// // 对外层模块 `outer_mod` 可见 /// pub(in outer_mod) fn outer_mod_visible_fn() {} /// // 对整个crate可见 /// pub(crate) fn crate_visible_fn() {} /// // `outer_mod` 内部可见 /// pub(super) fn super_mod_visible_fn() { /// // 访问同一模块的函数 /// inner_mod_visible_fn(); /// // 访问父模块的函数需要使用“::”前缀 /// ::outer_mod::outer_mod_fn(); /// } /// // 仅在`inner_mod`可见 /// pub(self) fn inner_mod_visible_fn() {} /// } /// /// pub fn foo() { /// inner_mod::outer_mod_visible_fn(); /// inner_mod::crate_visible_fn(); /// inner_mod::super_mod_visible_fn(); /// /// // 不能使用inner_mod 的私有函数 /// // inner_mod::inner_mod_visible_fn(); /// } /// } /// fn bar() { /// // 该函数对整个crate可见 /// outer_mod::inner_mod::crate_visible_fn(); /// /// // 该函数只对outer_mod可见 /// // outer_mod::inner_mod::super_mod_visible_fn(); /// /// // 该函数只对outer_mod可见 /// // outer_mod::inner_mod::outer_mod_visible_fn(); /// /// // 通过foo函数调用内部细节 /// outer_mod::foo(); /// } /// fn main() { bar() } /// ``` /// /// /// Basic usage: 模块可见性 Rust 2018 Edtion /// /// 请在Play手动选择Rust edition运行 /// /// ``` /// pub mod outer_mod { /// pub(self) fn outer_mod_fn() {} /// /// pub mod inner_mod { /// // 在Rust 2018 edtion 模块系统必须使用use导入 /// use crate::outer_mod::outer_mod_fn; /// // 对外层模块 `outer_mod` 可见 /// pub(in crate::outer_mod) fn outer_mod_visible_fn() {} /// // 对整个crate可见 /// pub(crate) fn crate_visible_fn() {} /// // `outer_mod` 内部可见 /// pub(super) fn super_mod_visible_fn() { /// // 访问同一模块的函数 /// inner_mod_visible_fn(); /// // 使用use导入了outer_mod /// outer_mod_fn(); /// } /// // 仅在`inner_mod`可见 /// pub(self) fn inner_mod_visible_fn() {} /// } /// /// pub fn foo() { /// inner_mod::outer_mod_visible_fn(); /// inner_mod::crate_visible_fn(); /// inner_mod::super_mod_visible_fn(); /// /// // 不能使用inner_mod 的私有函数 /// // inner_mod::inner_mod_visible_fn(); /// } /// } /// fn bar() { /// // 该函数对整个crate可见 /// outer_mod::inner_mod::crate_visible_fn(); /// /// // 该函数只对outer_mod可见 /// // outer_mod::inner_mod::super_mod_visible_fn(); /// /// // 该函数只对outer_mod可见 /// // outer_mod::inner_mod::outer_mod_visible_fn(); /// /// // 通过foo函数调用内部细节 /// outer_mod::foo(); /// } /// fn main() { bar() } /// ``` pub fn visibility(){ unimplemented!(); }