Add std::vec::iter

Author: brson

src/lib/vec.rs

@@ -655,12 +655,23 @@ fn eachi<T>(f: block(T, uint) -> (), v: [mutable? T]) {
     }
 }
 
+/*
+Function: iter
+
+Iterates over a vector
+
+Iterates over vector `v` and, for each element, calls function `f`
+*/
+fn iter<T>(v: [mutable? T], it: block(T)) {
+    iter2(v) { |_i, v| it(v) }
+}
+
 /*
 Function: iter2
 
 FIXME: This is exactly the same as eachi
 */
-fn iter2<T>(v: [T], it: block(uint, T)) {
+fn iter2<T>(v: [mutable? T], it: block(uint, T)) {
     let i = 0u;
     for x in v { it(i, x); i += 1u; }
 }

src/test/stdtest/vec.rs

@@ -292,6 +292,20 @@ fn test_foldl() {
     assert (sum == 15u);
 }
 
+#[test]
+fn iter_empty() {
+    let i = 0;
+    vec::iter::<int>([], { |_v| i += 1 });
+    assert i == 0;
+}
+
+#[test]
+fn iter_nonempty() {
+    let i = 0;
+    vec::iter([1, 2, 3], { |v| i += v });
+    assert i == 6;
+}
+
 #[test]
 fn test_any_and_all() {
     assert (vec::any(is_three, [1u, 2u, 3u]));