turbonone (no_std)

用于调用具有泛型 Option<T> 参数的函数的微型宏。

用法

将以下内容添加到您的 Cargo.toml 文件中

[dependencies]
turbonone = "0.*"

问题

fn my_function<T>(arg: Option<T>) -> &'static str {
    "Works!"
}

fn my_box_function<T>(arg: Option<Box<T>>) -> &'static str {
    "Works!"
}

fn my_complex_function<T>(arg: Option<Arc<Box<T>>>) -> &'static str {
    "Works!"
}

my_function(None); // cannot infer type for type parameter `T` declared on the associated function `my_function`
my_function(Some("An argument")); // Works!

my_box_function(None); // cannot infer type for type parameter `T` declared on the associated function `my_box_function`
my_box_function(Some(Box::new("An argument"))); // Works!

my_complex_function(None); // cannot infer type for type parameter `T` declared on the associated function `my_complex_function`
my_complex_function(Some(Arc::new(Box::new("An argument")))); // Works!

解决方案

#[macro_use] extern crate turbonone;

fn my_function<T>(arg: Option<T>) -> &'static str {
    "Works!"
}

fn my_box_function<T>(arg: Option<Box<T>>) -> &'static str {
    "Works!"
}

fn my_complex_function<T>(arg: Option<Arc<Box<T>>>) -> &'static str {
    "Works!"
}

my_function(turbonone!()); // Works!
my_function(Some("An argument")); // Works!

my_box_function(turbonone!(Box)); // Works!
my_box_function(turbonone!(Box<()>)); // Works!
my_box_function(Some(Box::new("An argument"))); // Works!

my_complex_function(turbonone!(Arc<Box<()>>)); // Works!
my_complex_function(Some(Arc::new(Box::new("An argument")))); // Works!