use lazy_static::lazy_static; use std::collections::HashMap; lazy_static! { pub static ref MAP: HashMap<&'static str, u8> = HashMap::from([("foo", 1), ("bar", 2), ("baz", 3), ("quxx", 99),]); } pub fn somefunction() { let foo = MAP.get("foo"); // Do stuff...
在这里，T::Err: Error需要Box<dyn Error>来实现Error，这很直观。正如this answer解释的那样，对于Box...
这很直观。正如this answer解释的那样，对于Box艾德Error来实现Error，它需要是Sized，哪个trait对象（即dy...