libcore: Add vec any2 and all2 functions.

src/libcore/vec.rs

@@ -507,6 +507,24 @@ fn any<T>(v: [T], f: block(T) -> bool) -> bool {
     ret false;
 }
 
+/*
+Function: any2
+
+Return true if a predicate matches any elements in both vectors.
+
+If the vectors contains no elements then false is returned.
+*/
+fn any2<T, U>(v0: [T], v1: [U], f: block(T, U) -> bool) -> bool {
+    let v0_len = len(v0);
+    let v1_len = len(v1);
+    let i = 0u;
+    while i < v0_len && i < v1_len {
+        if f(v0[i], v1[i]) { ret true; };
+        i += 1u;
+    }
+    ret false;
+}
+
 /*
 Function: all
 
@@ -519,6 +537,21 @@ fn all<T>(v: [T], f: block(T) -> bool) -> bool {
     ret true;
 }
 
+/*
+Function: all2
+
+Return true if a predicate matches all elements in both vectors.
+
+If the vectors are not the same size then false is returned.
+*/
+fn all2<T, U>(v0: [T], v1: [U], f: block(T, U) -> bool) -> bool {
+    let v0_len = len(v0);
+    if v0_len != len(v1) { ret false; }
+    let i = 0u;
+    while i < v0_len { if !f(v0[i], v1[i]) { ret false; }; i += 1u; }
+    ret true;
+}
+
 /*
 Function: member