[−][src]Crate concat_with
Concat-With
While the concat!
macro in std
is useful to create a static string slice (&'static str
) from literals, it cannot set a separator for those. This crate therefore provides another concat!
macro to deal with that situation.
#[macro_use] extern crate concat_with; assert_eq!("test10btrue", concat!("test", 10, 'b', true)); assert_eq!("test, 10, b, true", concat!(with ", ", "test", 10, 'b', true)); assert_eq!("test\n10\nb\ntrue", concat_line!("test", 10, 'b', true));
Prefixes and suffixes can also be added.
#[macro_use] extern crate concat_with; assert_eq!("Someone says: Hello.\nSomeone says: Nice to meet you!", concat_line!(prefix "Someone says: ", "Hello.", "Nice to meet you!"));
Create Your Own Macros
The concat_impl!
macro can be used to create your own macros like concat_line!
which concatenates literals separated by a specific literal.
extern crate concat_with; #[doc(hidden)] pub use concat_with::{concat, concat_impl}; // re-export `concat!` and `concat_impl!` if your custom macros use `#[macro_export]` concat_impl! { #[macro_export] /// Concatenates literals into a static string slice separated by a comma, `,`. Prefixes and suffixes can also be added. concat_with_comma => ", ", #[macro_export] /// Concatenates literals into a static string slice separated by a colon, `:`. Prefixes and suffixes can also be added. concat_with_colon => ':', } assert_eq!("test, 10, b, true", concat_with_comma!("test", 10, 'b', true)); assert_eq!("test:10:b:true", concat_with_colon!("test", 10, 'b', true));
Macros
concat | Concatenates literals into a static string slice. |
concat_impl | Create macros used for concatenating literals separated by a specific literal. |
concat_line | Concatenates literals into a static string slice separated by a line break, |