has_impl

在编译时检查类型是否实现了特例

示例

use has_impl::*;

trait Foo {}

impl Foo for i32 {}

fn main() {
	assert_eq!(has_impl!(i32: Foo), true);
}

安装

[dependencies]
has_impl = "0.1"

lib.rs:

此crate提供了has_impl!(type: Trait)宏来检查Trait是否在编译时实现了type

use has_impl::*;

trait Foo {}

impl Foo for i32 {}

fn main() {
assert_eq!(has_impl!(i32: Foo), true);
}