Pass parametric types by-alias in various stdlib spots.

Author: froystig

src/lib/_vec.rs

@@ -32,7 +32,7 @@ fn init_elt[T](&T t, uint n_elts) -> vec[T] {
   /**
    * FIXME (issue #81): should be:
    *
-   * fn elt_op[T](T x, uint i) -> T { ret x; }
+   * fn elt_op[T](&T x, uint i) -> T { ret x; }
    * let init_op[T] inner = bind elt_op[T](t, _);
    * ret init_fn[T](inner, n_elts);
    */
@@ -70,7 +70,7 @@ fn slice[T](vec[T] v, int start, int end) -> vec[T] {
 
 // Ought to take mutable &vec[T] v and just mutate it instead of copy
 // and return.  Blocking on issue #89 for this.
-fn grow[T](mutable vec[T] v, int n, T initval) -> vec[T] {
+fn grow[T](mutable vec[T] v, int n, &T initval) -> vec[T] {
   let int i = n;
   while (i > 0) {
     i -= 1;

src/lib/map.rs

@@ -9,8 +9,8 @@ import std.util;
 import std._vec;
 
 
-type hashfn[K] = fn(K) -> uint;
-type eqfn[K] = fn(K) -> bool;
+type hashfn[K] = fn(&K) -> uint;
+type eqfn[K] = fn(&K) -> bool;
 
 type hashmap[K, V] = obj {
   fn insert(&K key, &V val);

src/lib/util.rs

@@ -13,7 +13,7 @@ fn option_map[T, U](&operator[T, U] f, &option[T] opt) -> option[U] {
   }
 }
 
-fn id[T](T x) -> T {
+fn id[T](&T x) -> T {
   ret x;
 }