regex-debug: update deps

Principally, this updates docopt to 0.8, which replaces rustc-serialize
with serde.

Author: BurntSushi

regex-debug/Cargo.toml

@@ -11,7 +11,8 @@ description = "A tool useful for debugging regular expressions."
 workspace = ".."
 
 [dependencies]
-docopt = "0.6"
+docopt = "0.8"
 regex = { version = "0.2", path = ".." }
 regex-syntax = { version = "0.4.0", path = "../regex-syntax" }
-rustc-serialize = "0.3"
+serde = "1"
+serde_derive = "1"

regex-debug/src/main.rs

@@ -1,7 +1,9 @@
 extern crate docopt;
 extern crate regex;
 extern crate regex_syntax as syntax;
-extern crate rustc_serialize;
+extern crate serde;
+#[macro_use]
+extern crate serde_derive;
 
 use std::error;
 use std::io::{self, Write};
@@ -46,7 +48,7 @@ Options:
                          constructed by the literals found.
 ";
 
-#[derive(RustcDecodable)]
+#[derive(Deserialize)]
 struct Args {
     cmd_ast: bool,
     cmd_prefixes: bool,
@@ -74,7 +76,7 @@ type Result<T> = result::Result<T, Box<error::Error + Send + Sync>>;
 
 fn main() {
     let mut args: Args = Docopt::new(USAGE)
-                                .and_then(|d| d.decode())
+                                .and_then(|d| d.deserialize())
                                 .unwrap_or_else(|e| e.exit());
     if args.flag_dfa_reverse {
         args.flag_dfa = true;