1 files changed, 25 insertions, 0 deletions
diff --git a/src/libsyntax/diagnostics/registry.rs b/src/libsyntax/diagnostics/registry.rs
new file mode 100644
index 00000000000..7bc191df55a
--- /dev/null
+++ b/src/libsyntax/diagnostics/registry.rs
@@ -0,0 +1,25 @@
+// Copyright 2014 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.
+
+use std::collections::HashMap;
+
+pub struct Registry {
+    descriptions: HashMap<&'static str, &'static str>
+}
+
+impl Registry {
+    pub fn new(descriptions: &[(&'static str, &'static str)]) -> Registry {
+        Registry { descriptions: descriptions.iter().map(|&tuple| tuple).collect() }
+    }
+
+    pub fn find_description(&self, code: &str) -> Option<&'static str> {
+        self.descriptions.find_equiv(&code).map(|desc| *desc)
+    }
+}