wrap

通用 Rust 包装宏

定义通用 包装器 的宏，并将它们应用于任意函数。请参阅 examples。

简单用法

#[macro_use] extern crate wrap;


def_wrapper!{log1 =
    before = (fn_args) >> {
        println!("* [log-1] >> before everything! fn_args: {:?}", fn_args);
    };
    after  = (wrapped_result) >> {
        println!("* [log-1] >> after everything! wrapped_result: {:?}", wrapped_result);
    };
}


def_wrapper!{log2 =
    before = (fn_args) >> {
        println!("* [log-2] >> before everything! fn_args: {:?}", fn_args);
    };
    after  = (wrapped_result) >> {
        println!("* [log-2] >> after everything! wrapped_result: {:?}", wrapped_result);
    };
}


wrap_with!{log1 >>
fn greet_logged_inner(name: &str) -> String = {
    format!("How are you, {}?", name)
}}


wrap_with!{log2 >>
fn greet_logged(name: &str) -> String = {
    format!("Hello! {}", greet_logged_inner(name))
}}


pub fn main() {
    println!("{}", greet_logged("james"));
}