R4d (Rad)

R4d is a text oriented macro prosessor made with rust.

NOTE

Is it stable?

I'm currently dog fooding for bug detections, and there might be some undetected bugs. However it doesn't mean that the syntax will change in the future without breaking release. (At least until 2.0)

The reason r4d is not yet in 1.0 is that I want to make sure that followings are solved.

• Absence of critical bugs
• No more basic macro behaviour(internal logic) changes

Therefore it is quite stable, in terms of non-breakable syntax(interface), but there will be bug fixes and non breaking changes.

Install

You can download binaries in release page

If your platform is not listed, mostly MacOS, directly install from cargo registry.

```bash

Binary features is mandatory or else it is not an executable

cargo install r4d --features binary

If you need color prompt, then use features "color"

cargo install r4d --features binary,color ```

Simple usage

Binary ```

Read from file and print to stdout

rad input_file.txt

Read from standard input and print to file

printf '...text...' | rad -o out_file.txt ```

Library ```rust use rad::RadError; use rad::Processor;

let processor = Processor::new() .purge(true) .greedy(true) .writetofile(Some(PathBuf::from("cache.txt")))? .build();

processor.fromfile(Path::new("input.txt"))?; processor.printresult()?; ```

Usage

Detailed usage

Syntax

Macro syntax

Built-in macros (or macro-like functions)

Macros

How to debug

Debug

Goal

R4d aims to be a modern alternative to m4 processor, which means

• No trivial m4 quotes for macro definition
• An explicit rule for macro definition and usage so that de facto underscore rule is not necessary
• Easier binding with other programming languages(Rust's c binding)
• Enable combination of file stream and stdout
• As expressive as current m4 macro processor