litext 1.2.1

Seamless proc-macro literal extraction.
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<div align="center">

# litext

[![Rust Version](https://img.shields.io/badge/rustc-2024%20edition-blue.svg)](https://doc.rust-lang.org/edition-guide/rust-2024/)
[![Crates.io Version](https://img.shields.io/crates/v/litext)](https://crates.io/crates/litext)
[![docs.rs](https://img.shields.io/docsrs/litext)](https://docs.rs/litext)
[![License MIT](https://img.shields.io/crates/l/litext)](https://codeberg.org/razkar/litext/src/branch/main/LICENSE-MIT)
[![License Apache-2.0](https://img.shields.io/crates/l/litext)](https://codeberg.org/razkar/litext/src/branch/main/LICENSE-APACHE)
[![Crates.io Downloads](https://img.shields.io/crates/d/litext)](https://crates.io/crates/litext)
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Seamless literal extraction for procedural macros.

```rust
let value: String = litext!(input);
let count: u32 = litext!(input as u32);
let (s, n): (String, i32) = litext!(input as (String, i32));
```

</div>

## What is this?

litext (*lee-text* /ˈliː.tɛkst/) is a crate for extracting literal values for procedural macros. It's clean, easy, extendable, and fits in a singular line.

When you write a procedural macro, you often receive a `TokenStream` that contains a single literal and need to pull out its value. `litext` does this for you, easily, in one line.

The library supports every Rust literal kind, span-aware wrapper types for precise diagnostics, a `ToTokens` round-trip trait, a `FromLit` extension point for custom types (that *you* can make!), and a variadic multi-extraction form.

## Installation

```sh
cargo add litext
```

Your proc-macro entry point needs to bridge `proc_macro` and `proc_macro2`:

```rust
#[proc_macro]
pub fn my_macro(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
    my_macro_inner(input.into()).into()
}

fn my_macro_inner(input: proc_macro2::TokenStream) -> proc_macro2::TokenStream {
    let s: String = litext!(input);
    // ...
}
```

## Basic Usage

```rust
// Extract any literal as String
let text: String = litext!(input);

// Extract with explicit type
let num: i32  = litext!(input as i32);
let val: f64  = litext!(input as f64);
let ch: char  = litext!(input as char);
let flag: bool = litext!(input as bool);

// Keep the Result instead of returning early
let result: Result<String, TokenStream> = litext!(try input);
```

See [MORE.md](MORE.md) for detailed documentation on multi-extraction, span-aware types, round-tripping, custom types, and all supported literal formats.

## Why litext?

- **Every literal kind**: strings, integers in any radix, floats, chars, bools, bytes, byte strings, C strings
- **Negative numbers**: handles `-42` for signed types automatically
- **Extract multiple at once**: pull several values from one TokenStream with a clean tuple syntax
- **Span-aware**: every type has a `Lit*` variant with `.span()` for precise error messages
- **Round-trip support**: convert back to TokenStream with original spans preserved
- **Extendable**: implement `FromLit` for your own types

## Supported Types

| Category | Types |
|----------|-------|
| Strings | `String`, `LitStr` |
| Integers | `i8`-`i128`, `isize`, `u8`-`u128`, `usize`, `LitInt<T>` |
| Floats | `f32`, `f64`, `LitFloat<T>` |
| Characters | `char`, `LitChar` |
| Booleans | `bool`, `LitBool` |
| Bytes | `u8`, `LitByte`, `Vec<u8>`, `LitByteStr` |
| C Strings | `CString`, `LitCStr` |

As of 1.2, negative literals work for signed types (`i32`, `f64`, etc. not `u32`, etc.)

## Requirements

- Rust 2024 edition (Rust 1.85)
- `proc_macro2` as a direct dependency

## License

Licensed under either of:

- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or <http://www.apache.org/licenses/LICENSE-2.0>)
- MIT license ([LICENSE-MIT](LICENSE-MIT) or <http://opensource.org/licenses/MIT>)

at your option.

Cheers, RazkarStudio

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