concat-with 0.2.9

Extend the function of the `concat!` macro in `std`.
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Concat With
====================

[![CI](https://github.com/magiclen/concat-with/actions/workflows/ci.yml/badge.svg)](https://github.com/magiclen/concat-with/actions/workflows/ci.yml)

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
assert_eq!("test10btrue", concat_with::concat!("test", 10, 'b', true));
assert_eq!("test, 10, b, true", concat_with::concat!(with ", ", "test", 10, 'b', true));
assert_eq!("test\n10\nb\ntrue", concat_with::concat_line!("test", 10, 'b', true));
```

Prefixes and suffixes can also be added.

```rust
assert_eq!("Someone says: Hello.\nSomeone says: Nice to meet you!", concat_with::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.

```rust
#[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 and a whitespace, `, `. 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));
```

## Crates.io

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

## Documentation

https://docs.rs/concat-with

## License

[MIT](LICENSE)