Take &Pat

Author: sanxiyn

src/librustc/middle/pat_util.rs

@@ -20,7 +20,7 @@ pub type PatIdMap = HashMap<Ident, NodeId>;
 
 // This is used because same-named variables in alternative patterns need to
 // use the NodeId of their namesake in the first pattern.
-pub fn pat_id_map(dm: resolve::DefMap, pat: @Pat) -> PatIdMap {
+pub fn pat_id_map(dm: resolve::DefMap, pat: &Pat) -> PatIdMap {
     let mut map = HashMap::new();
     do pat_bindings(dm, pat) |_bm, p_id, _s, n| {
       map.insert(path_to_ident(n), p_id);
@@ -52,7 +52,7 @@ pub fn pat_is_const(dm: resolve::DefMap, pat: &Pat) -> bool {
     }
 }
 
-pub fn pat_is_binding(dm: resolve::DefMap, pat: @Pat) -> bool {
+pub fn pat_is_binding(dm: resolve::DefMap, pat: &Pat) -> bool {
     match pat.node {
         PatIdent(*) => {
             !pat_is_variant_or_struct(dm, pat) &&
@@ -62,7 +62,7 @@ pub fn pat_is_binding(dm: resolve::DefMap, pat: @Pat) -> bool {
     }
 }
 
-pub fn pat_is_binding_or_wild(dm: resolve::DefMap, pat: @Pat) -> bool {
+pub fn pat_is_binding_or_wild(dm: resolve::DefMap, pat: &Pat) -> bool {
     match pat.node {
         PatIdent(*) => pat_is_binding(dm, pat),
         PatWild | PatWildMulti => true,
@@ -73,7 +73,7 @@ pub fn pat_is_binding_or_wild(dm: resolve::DefMap, pat: @Pat) -> bool {
 /// Call `it` on every "binding" in a pattern, e.g., on `a` in
 /// `match foo() { Some(a) => (), None => () }`
 pub fn pat_bindings(dm: resolve::DefMap,
-                    pat: @Pat,
+                    pat: &Pat,
                     it: |BindingMode, NodeId, Span, &Path|) {
     do walk_pat(pat) |p| {
         match p.node {
@@ -86,15 +86,15 @@ pub fn pat_bindings(dm: resolve::DefMap,
     };
 }
 
-pub fn pat_binding_ids(dm: resolve::DefMap, pat: @Pat) -> ~[NodeId] {
+pub fn pat_binding_ids(dm: resolve::DefMap, pat: &Pat) -> ~[NodeId] {
     let mut found = ~[];
     pat_bindings(dm, pat, |_bm, b_id, _sp, _pt| found.push(b_id) );
     return found;
 }
 
 /// Checks if the pattern contains any patterns that bind something to
 /// an ident, e.g. `foo`, or `Foo(foo)` or `foo @ Bar(*)`.
-pub fn pat_contains_bindings(dm: resolve::DefMap, pat: @Pat) -> bool {
+pub fn pat_contains_bindings(dm: resolve::DefMap, pat: &Pat) -> bool {
     let mut contains_bindings = false;
     do walk_pat(pat) |p| {
         if pat_is_binding(dm, p) {

src/libsyntax/ast_util.rs

@@ -636,7 +636,7 @@ pub fn is_item_impl(item: @ast::item) -> bool {
     }
 }
 
-pub fn walk_pat(pat: @Pat, it: |@Pat| -> bool) -> bool {
+pub fn walk_pat(pat: &Pat, it: |&Pat| -> bool) -> bool {
     if !it(pat) {
         return false;
     }