Crate maplit [−] [src]

Macros for container literals with specific type.

#[macro_use] extern crate maplit;

let map = hashmap!{
    "a" => 1,
    "b" => 2,
};

The maplit crate uses => syntax for the mapping macros. It is not possible to use : as separator due to syntactic restrictions in regular macro_rules! macros.

Note that rust macros are flexible in which brackets you use for the invocation. You can use them as hashmap!{} or hashmap![] or hashmap!(). This crate suggests {} as the convention for the map & set macros, it matches their Debug output.

Generic container macros already exist elsewhere, so those are not provided here at the moment.

Macros

btreemap	Create a BTreeMap from a list of key-value pairs
btreeset	Create a BTreeSet from a list of elements.
convert_args	Macro that converts the keys or key-value pairs passed to another maplit macro. The default conversion is to use the `Into` trait, if no custom conversion is passed.
hashmap	Create a HashMap from a list of key-value pairs
hashset	Create a HashSet from a list of elements.