made macro test even simpler, added a few tests

Cargo.toml

@@ -17,3 +17,5 @@ plugin = true
 
 [dev-dependencies]
 compiletest_rs = "*"
+regex = "*"
+regex_macros = "*"

src/lib.rs

@@ -1,6 +1,5 @@
 #![feature(plugin_registrar, box_syntax)]
 #![feature(rustc_private, collections)]
-
 #![allow(unused_imports)]
 
 #[macro_use]

src/mut_mut.rs

@@ -27,7 +27,7 @@ impl LintPass for MutMut {
 }
 
 fn check_expr_expd(cx: &Context, expr: &Expr, info: Option<&ExpnInfo>) {
-	if in_external_macro(info) { return; }
+	if in_macro(info) { return; }
 
 	fn unwrap_addr(expr : &Expr) -> Option<&Expr> {
 		match expr.node {
@@ -51,8 +51,8 @@ fn check_expr_expd(cx: &Context, expr: &Expr, info: Option<&ExpnInfo>) {
 	})
 }
 
-fn in_external_macro(info: Option<&ExpnInfo>) -> bool {
-	info.map_or(false, |i| i.callee.span.is_some())
+fn in_macro(info: Option<&ExpnInfo>) -> bool {
+	info.is_some()
 }
 
 fn unwrap_mut(ty : &Ty) -> Option<&Ty> {

src/ptr_arg.rs

@@ -27,7 +27,7 @@ impl LintPass for PtrArg {
     }
     
     fn check_item(&mut self, cx: &Context, item: &Item) {
-		if let &ItemFn(ref decl, _, _, _, _) = &item.node {
+		if let &ItemFn(ref decl, _, _, _, _, _) = &item.node {
 			check_fn(cx, decl);
 		}
 	}

tests/compile-fail/mut_mut.rs

@@ -1,11 +1,18 @@
 #![feature(plugin)]
 #![plugin(clippy)]
 
+//#![plugin(regex_macros)]
+//extern crate regex;
+
 #[deny(mut_mut)]
 fn fun(x : &mut &mut u32) -> bool { //~ERROR
 	**x > 0
 }
 
+macro_rules! mut_ptr {
+	($p:expr) => { &mut $p }
+} 
+
 #[deny(mut_mut)]
 #[allow(unused_mut, unused_variables)]
 fn main() {
@@ -22,4 +29,6 @@ fn main() {
 									   //~^^^^ ERROR
 		***y + **x;
 	}
+	
+	let mut z = mut_ptr!(&mut 3u32); //~ERROR
 }

tests/compile-test.rs

@@ -5,7 +5,7 @@ use std::path::PathBuf;
 fn run_mode(mode: &'static str) {
     let mut config = compiletest::default_config();
     let cfg_mode = mode.parse().ok().expect("Invalid mode");
-    config.target_rustcflags = Some("-L target/debug/".to_string());
+    config.target_rustcflags = Some("-l regex_macros -L target/debug/".to_string());
 
     config.mode = cfg_mode;
     config.src_base = PathBuf::from(format!("tests/{}", mode));

tests/run-pass.rs

@@ -0,0 +1,11 @@
+#![feature(plugin)]
+#![plugin(clippy, regex_macros)]
+
+extern crate regex;
+
+#[test]
+#[deny(mut_mut)]
+fn test_regex() {
+	let pattern = regex!(r"^(?P<level>[#]+)\s(?P<title>.+)$");
+	assert!(pattern.is_match("# headline"));
+}