willi-kappler / typed_macros

Typed macros

A traditional macro can't natively have arguments with type, they can only accept a handful of meta types (expr, ident, vis...), with this crate you can explicitely say the type of the argument you want the macro to take.

Usage

Add the following dependency to your Cargo.toml file:

[dependencies]
typed_macros = "1.0.0"

And check the documentation on how to use it.

Example

use typed_macros::macrox;

macrox! {
	/// You can even use attributes!
	#[macro_export]
	macro foo(bar: String) {
		// Do something with bar...
	}
}

fn main() {
	foo(String::from("Some string")); // <- This won't throw an error.
	foo(9u32); // <- This will throw an error.
}

The main macro is macrox, it takes an input like macro name(arg1: type1, arg2: type2) { /* Code */ }, both the macrox

Testing

You can run cargo test in the root directory, but you'll only see an error (an intended error) because the macro this_should_warn was asking for a u32 type, and the test tried to use it with a String.