move nice-region-error reporting into its own module

src/librustc/infer/error_reporting/mod.rs

@@ -78,10 +78,7 @@ mod note;
 
 mod need_type_info;
 
-mod named_anon_conflict;
-#[macro_use]
-mod util;
-mod different_lifetimes;
+mod nice_region_error;
 
 impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
     pub fn note_and_explain_region(self,

src/librustc/infer/error_reporting/nice_region_error/different_lifetimes.rs

@@ -18,7 +18,7 @@ use infer::lexical_region_resolve::RegionResolutionError;
 use hir::map as hir_map;
 use middle::resolve_lifetime as rl;
 use hir::intravisit::{self, Visitor, NestedVisitorMap};
-use infer::error_reporting::util::AnonymousArgInfo;
+use infer::error_reporting::nice_region_error::util::AnonymousArgInfo;
 
 impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
     /// Print the error message for lifetime errors when both the concerned regions are anonymous.

src/librustc/infer/error_reporting/nice_region_error/mod.rs

@@ -0,0 +1,14 @@
+// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use] mod util;
+
+mod different_lifetimes;
+mod named_anon_conflict;