diff --git a/src/compiletest/runtest.rs b/src/compiletest/runtest.rs
index d7810ced2b6..7b0ef583f40 100644
--- a/src/compiletest/runtest.rs
+++ b/src/compiletest/runtest.rs
@@ -526,7 +526,7 @@ fn make_run_args(config: config, _props: test_props, testfile: &Path) ->
 
 fn split_maybe_args(argstr: Option<~str>) -> ~[~str] {
     fn rm_whitespace(v: ~[~str]) -> ~[~str] {
-        vec::filter(v, |s| !str::is_whitespace(*s))
+        v.filtered(|s| !str::is_whitespace(*s))
     }
 
     match argstr {
diff --git a/src/libcore/os.rs b/src/libcore/os.rs
index 587d684c60c..6b3f97daa76 100644
--- a/src/libcore/os.rs
+++ b/src/libcore/os.rs
@@ -619,7 +619,7 @@ pub fn list_dir(p: &Path) -> ~[~str] {
     #[cfg(windows)]
     fn star(p: &Path) -> Path { p.push("*") }
 
-    do rustrt::rust_list_files2(star(p).to_str()).filter |filename| {
+    do rustrt::rust_list_files2(star(p).to_str()).filtered |filename| {
         *filename != ~"." && *filename != ~".."
     }
 }
diff --git a/src/libcore/vec.rs b/src/libcore/vec.rs
index ab0b5049f8e..511063bb44f 100644
--- a/src/libcore/vec.rs
+++ b/src/libcore/vec.rs
@@ -853,7 +853,7 @@ pub pure fn filter_map<T, U: Copy>(v: &[T], f: fn(t: &T) -> Option<U>)
  * Apply function `f` to each element of `v` and return a vector containing
  * only those elements for which `f` returned true.
  */
-pub pure fn filter<T: Copy>(v: &[T], f: fn(t: &T) -> bool) -> ~[T] {
+pub pure fn filtered<T: Copy>(v: &[T], f: fn(t: &T) -> bool) -> ~[T] {
     let mut result = ~[];
     for each(v) |elem| {
         if f(elem) { unsafe { result.push(*elem); } }
@@ -1752,7 +1752,7 @@ impl<T: Eq> &[T]: ImmutableEqVector<T> {
 }
 
 pub trait ImmutableCopyableVector<T> {
-    pure fn filter(&self, f: fn(t: &T) -> bool) -> ~[T];
+    pure fn filtered(&self, f: fn(&T) -> bool) -> ~[T];
     pure fn rfind(&self, f: fn(t: &T) -> bool) -> Option<T>;
     pure fn partitioned(&self, f: fn(&T) -> bool) -> (~[T], ~[T]);
 }
@@ -1767,8 +1767,8 @@ impl<T: Copy> &[T]: ImmutableCopyableVector<T> {
      * containing only those elements for which `f` returned true.
      */
     #[inline]
-    pure fn filter(&self, f: fn(t: &T) -> bool) -> ~[T] {
-        filter(*self, f)
+    pure fn filtered(&self, f: fn(t: &T) -> bool) -> ~[T] {
+        filtered(*self, f)
     }
 
     /**
@@ -3618,7 +3618,7 @@ mod tests {
     fn test_filter_fail() {
         let v = [(~0, @0), (~0, @0), (~0, @0), (~0, @0)];
         let mut i = 0;
-        do filter(v) |_elt| {
+        do v.filtered |_elt| {
             if i == 2 {
                 fail
             }
diff --git a/src/libfuzzer/fuzzer.rc b/src/libfuzzer/fuzzer.rc
index de8ce8fc370..5f954558668 100644
--- a/src/libfuzzer/fuzzer.rc
+++ b/src/libfuzzer/fuzzer.rc
@@ -262,8 +262,9 @@ fn as_str(f: fn@(+x: io::Writer)) -> ~str {
 fn check_variants_of_ast(crate: ast::crate, codemap: @codemap::CodeMap,
                          filename: &Path, cx: context) {
     let stolen = steal(crate, cx.mode);
-    let extra_exprs = vec::filter(common_exprs(),
-                                  |a| safe_to_use_expr(*a, cx.mode) );
+    let extra_exprs = do common_exprs().filtered |a| {
+        safe_to_use_expr(*a, cx.mode)
+    };
     check_variants_T(crate, codemap, filename, ~"expr",
                      extra_exprs + stolen.exprs, pprust::expr_to_str,
                      replace_expr_in_crate, cx);
diff --git a/src/librustc/front/config.rs b/src/librustc/front/config.rs
index b5622e1e575..10c2f2e65f1 100644
--- a/src/librustc/front/config.rs
+++ b/src/librustc/front/config.rs
@@ -103,11 +103,11 @@ fn fold_item_underscore(cx: ctxt, +item: ast::item_,
                         fld: fold::ast_fold) -> ast::item_ {
     let item = match item {
         ast::item_impl(a, b, c, methods) => {
-            let methods = methods.filter(|m| method_in_cfg(cx, *m) );
+            let methods = methods.filtered(|m| method_in_cfg(cx, *m) );
             ast::item_impl(a, b, c, methods)
         }
         ast::item_trait(ref a, ref b, ref methods) => {
-            let methods = methods.filter(|m| trait_method_in_cfg(cx, m) );
+            let methods = methods.filtered(|m| trait_method_in_cfg(cx, m) );
             ast::item_trait(/*bad*/copy *a, /*bad*/copy *b, methods)
         }
         item => item
diff --git a/src/librustc/middle/astencode.rs b/src/librustc/middle/astencode.rs
index 45e4b9f328f..9b024f87f41 100644
--- a/src/librustc/middle/astencode.rs
+++ b/src/librustc/middle/astencode.rs
@@ -256,7 +256,7 @@ fn encode_ast(ebml_w: writer::Encoder, item: ast::inlined_item) {
 // inlined items.
 fn simplify_ast(ii: ast::inlined_item) -> ast::inlined_item {
     fn drop_nested_items(blk: ast::blk_, fld: fold::ast_fold) -> ast::blk_ {
-        let stmts_sans_items = do vec::filter(blk.stmts) |stmt| {
+        let stmts_sans_items = do blk.stmts.filtered |stmt| {
             match stmt.node {
               ast::stmt_expr(_, _) | ast::stmt_semi(_, _) |
               ast::stmt_decl(@ast::spanned { node: ast::decl_local(_),
diff --git a/src/librustc/middle/trans/controlflow.rs b/src/librustc/middle/trans/controlflow.rs
index c1abe7e417b..66e76452cba 100644
--- a/src/librustc/middle/trans/controlflow.rs
+++ b/src/librustc/middle/trans/controlflow.rs
@@ -174,7 +174,7 @@ fn trans_log(log_ex: @ast::expr,
 
     let modpath = vec::append(
         ~[path_mod(ccx.sess.ident_of(/*bad*/copy ccx.link_meta.name))],
-        vec::filter(bcx.fcx.path, |e|
+        bcx.fcx.path.filtered(|e|
             match *e { path_mod(_) => true, _ => false }
         ));
     // XXX: Bad copy.
diff --git a/src/librustdoc/page_pass.rs b/src/librustdoc/page_pass.rs
index e099beef7b6..c8e2865e986 100644
--- a/src/librustdoc/page_pass.rs
+++ b/src/librustdoc/page_pass.rs
@@ -129,7 +129,7 @@ fn fold_mod(
 
 fn strip_mod(doc: doc::ModDoc) -> doc::ModDoc {
     doc::ModDoc_({
-        items: do vec::filter(doc.items) |item| {
+        items: do doc.items.filtered |item| {
             match *item {
               doc::ModTag(_) => false,
               doc::NmodTag(_) => false,
diff --git a/src/librustdoc/prune_hidden_pass.rs b/src/librustdoc/prune_hidden_pass.rs
index c87cc6f7d8c..74c4b881eb3 100644
--- a/src/librustdoc/prune_hidden_pass.rs
+++ b/src/librustdoc/prune_hidden_pass.rs
@@ -43,9 +43,9 @@ fn fold_mod(
     let doc = fold::default_any_fold_mod(fold, doc);
 
     doc::ModDoc_({
-        items: vec::filter(doc.items, |ItemTag| {
+        items: do doc.items.filtered |ItemTag| {
             !is_hidden(fold.ctxt, ItemTag.item())
-        }),
+        },
         .. *doc
     })
 }
diff --git a/src/librustdoc/prune_private_pass.rs b/src/librustdoc/prune_private_pass.rs
index 25613acbb35..f3db152696e 100644
--- a/src/librustdoc/prune_private_pass.rs
+++ b/src/librustdoc/prune_private_pass.rs
@@ -49,9 +49,9 @@ fn fold_mod(
     let doc = fold::default_any_fold_mod(fold, doc);
 
     doc::ModDoc_({
-        items: do doc.items.filter |ItemTag| {
+        items: doc.items.filter(|ItemTag| {
             is_visible(fold.ctxt, ItemTag.item())
-        },
+        }),
         .. *doc
     })
 }
diff --git a/src/libsyntax/ast_util.rs b/src/libsyntax/ast_util.rs
index 91baaaaa1da..55ac2ae0964 100644
--- a/src/libsyntax/ast_util.rs
+++ b/src/libsyntax/ast_util.rs
@@ -316,11 +316,12 @@ pure fn unguarded_pat(a: &arm) -> Option<~[@pat]> {
 }
 
 fn public_methods(ms: ~[@method]) -> ~[@method] {
-    vec::filter(ms,
-                |m| match m.vis {
-                    public => true,
-                    _   => false
-                })
+    do ms.filtered |m| {
+        match m.vis {
+            public => true,
+            _   => false
+        }
+    }
 }
 
 // extract a ty_method from a trait_method. if the trait_method is
diff --git a/src/libsyntax/ext/auto_encode.rs b/src/libsyntax/ext/auto_encode.rs
index a3f208a3f07..90df6fde8e3 100644
--- a/src/libsyntax/ext/auto_encode.rs
+++ b/src/libsyntax/ext/auto_encode.rs
@@ -121,7 +121,7 @@ fn expand_auto_encode(
     }
 
     fn filter_attrs(item: @ast::item) -> @ast::item {
-        @{attrs: vec::filter(item.attrs, |a| !is_auto_encode(a)),
+        @{attrs: item.attrs.filtered(|a| !is_auto_encode(a)),
           .. *item}
     }
 
@@ -185,7 +185,7 @@ fn expand_auto_decode(
     }
 
     fn filter_attrs(item: @ast::item) -> @ast::item {
-        @{attrs: vec::filter(item.attrs, |a| !is_auto_decode(a)),
+        @{attrs: item.attrs.filtered(|a| !is_auto_decode(a)),
           .. *item}
     }