---

yaml
---
r: 79358
b: refs/heads/try
c: 9c1689d
h: refs/heads/master
v: v3

Author: jbclements

[refs]

@@ -2,7 +2,7 @@
 refs/heads/master: 3e6de6b7da8ee88bf84b0e217900051334be08da
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: 60fba4d7d677ec098e6a43014132fe99f7547363
-refs/heads/try: be93735e4e818fb4bbb5be2a71921fd94726286e
+refs/heads/try: 9c1689d38ccccc44f40b1a09c698df8760c9d30b
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
 refs/heads/try2: 147ecfdd8221e4a4d4e090486829a06da1e0ca3c

branches/try/src/libsyntax/ast_util.rs

@@ -985,13 +985,50 @@ pub fn getLast(arr: &~[Mrk]) -> uint {
     *arr.last()
 }
 
+// are two paths equal when compared unhygienically?
+// since I'm using this to replace ==, it seems appropriate
+// to compare the span, global, etc. fields as well.
+pub fn path_name_eq(a : &ast::Path, b : &ast::Path) -> bool {
+    (a.span == b.span)
+    && (a.global == b.global)
+    // NOTE: ident->name in lifetimes!
+    && (a.rp == b.rp)
+    // NOTE: can a type contain an ident?
+    && (a.types == b.types)
+    && (idents_name_eq(a.idents, b.idents))
+}
+
+// are two arrays of idents equal when compared unhygienically?
+pub fn idents_name_eq(a : &[ast::ident], b : &[ast::ident]) -> bool {
+    if (a.len() != b.len()) {
+        false
+    } else {
+        for a.iter().enumerate().advance |(idx,id)|{
+            if (id.name != b[idx].name) {
+                return false;
+            }
+        }
+        true
+    }
+}
 
 #[cfg(test)]
 mod test {
     use ast::*;
     use super::*;
     use std::io;
 
+    #[test] fn idents_name_eq_test() {
+        assert!(idents_name_eq(~[ident{name:3,ctxt:4},
+                                 ident{name:78,ctxt:82}],
+                               ~[ident{name:3,ctxt:104},
+                                 ident{name:78,ctxt:182}]));
+        assert!(!idents_name_eq(~[ident{name:3,ctxt:4},
+                                  ident{name:78,ctxt:82}],
+                                ~[ident{name:3,ctxt:104},
+                                  ident{name:77,ctxt:182}]));
+    }
+
     #[test] fn xorpush_test () {
         let mut s = ~[];
         xorPush(&mut s,14);