easy-plugin

A compiler plugin that makes it easier to write compiler plugins.

Released under the Apache License 2.0.

Supported Configurations

• Nightly Rust channel (Documentation)
• Stable and beta Rust channels (Documentation)

By default, easy-plugin expects to be compiled by a nightly Rust compiler. easy-plugin is also supported on the stable and beta channels of Rust with syntex. To enable this support, enable the stable Cargo feature.

Example

```rust easy_plugin! { struct Arguments { // An argument specification that accepts a simple binary expression. $a:ident $operator:binop $b:ident }

// The `arguments: Arguments` argument contains the parsed results of the
// plugin arguments according to the above specification. An error is reported
// if the plugin arguments cannot be parsed.
pub fn expand_plugin(
    context: &mut ExtCtxt, span: Span, arguments: Arguments
) -> PluginResult<Box<MacResult>> {
    // Accesses the parsed results.
    println!("{:?} {:?} {:?}", arguments.a, arguments.operator, arguments.b);

    // Returns `Ok` to signal this plugin completed successfully. An error is
    // reported if `Err` is returned instead.
    Ok(DummyResult::any(span))
}

}

[plugin_registrar]

pub fn pluginregistrar(registry: &mut Registry) { registry.registermacro("plugin", expand_plugin); } ```