NormalTT

Cargo.toml

[package]
name = "normaltt"
version = "0.0.1"

[lib]
name = "normaltt_ext"
path = "lib.rs"
plugin = true
crate-type = ["dylib"]

[[bin]]
name = "normaltt"
path = "main.rs"

lib.rs

#![allow(unstable)]
#![feature(plugin_registrar)]

extern crate rustc;
extern crate syntax;

use rustc::plugin::Registry;
use syntax::ast;
use syntax::codemap::Span;
use syntax::ext::base;
use syntax::ext::quote::rt::ExtParseUtils;
use syntax::ext::quote::rt::ToSource;
use syntax::parse::token;

#[plugin_registrar]
pub fn plugin_registrar(reg: &mut Registry) {
    reg.register_macro("homu", expand_homu);
}

fn expand_homu(cx: &mut base::ExtCtxt, sp: Span, args: &[ast::TokenTree]) -> Box<base::MacResult + 'static> {
    if let [ast::TtToken(_, token::Ident(ident, _))] = args {
        base::MacExpr::new(
            //手抜き感
            cx.parse_expr(ident.as_str().to_source())
        )
    } else {
        cx.span_err(sp, "the argument must be a identifier");
        base::DummyResult::any(sp)
    }
}

main.rs

#![feature(plugin)]

#[plugin]
#[no_link]
extern crate normaltt_ext;

fn main() {
    println!(homu!(grief_seed));
}