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.

```rust

[macrouse] extern crate concatwith;

asserteq!("test10btrue", concat!("test", 10, 'b', true)); asserteq!("test, 10, b, true", concat!(with ", ", "test", 10, 'b', true)); asserteq!("test\n10\nb\ntrue", concatline!("test", 10, 'b', true)); ```

Prefixes and suffixes can also be added.

```rust

[macrouse] extern crate concatwith;

asserteq!("Someone says: Hello.\nSomeone says: Nice to meet you!", concatline!(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.

```rust extern crate concat_with;

[doc(hidden)]

pub use concatwith::{concat, concatimpl}; // re-export concat! and concat_impl! if your custom macros use #[macro_export]

concatimpl! { #[macroexport] /// Concatenates literals into a static string slice separated by a comma and a whitespace, ,. Prefixes and suffixes can also be added. concatwithcomma => ", ", #[macroexport] /// Concatenates literals into a static string slice separated by a colon, :. Prefixes and suffixes can also be added. concatwith_colon => ':', }

asserteq!("test, 10, b, true", concatwithcomma!("test", 10, 'b', true)); asserteq!("test:10:b:true", concatwithcolon!("test", 10, 'b', true)); ```

Crates.io

https://crates.io/crates/concat-with

Documentation

https://docs.rs/concat-with

License

MIT