Use an actual Rust parser for the match_token! macro.

Author: SimonSapin

Cargo.toml

@@ -33,7 +33,6 @@ harness = false
 [features]
 unstable = ["tendril/unstable", "string_cache/unstable"]
 heap_size = ["heapsize", "heapsize_plugin"]
-codegen = []  # Now unused, remove at the next breaking change
 
 [dependencies]
 log = "0"
@@ -50,7 +49,9 @@ rustc-test = "0.1.3"
 
 [build-dependencies]
 phf_codegen = "0.7.3"
+quote = "0.3"
 rustc-serialize = "0.3.15"
+syn = { version = "0.9.1", features = ["full", "visit"]}
 
 [profile.dev]
 debug = false

build.rs

@@ -8,7 +8,9 @@
 // except according to those terms.
 
 extern crate phf_codegen;
+#[macro_use] extern crate quote;
 extern crate rustc_serialize;
+extern crate syn;
 
 use rustc_serialize::json::{Json, Decoder};
 use rustc_serialize::Decodable;