auto merge of #6487 : recrack/rust/vec_len, r=thestinger

Rename vec::len(var) to var.len()

```
libcore, libfuzzer, librustc, librustdoc, libstd, libsyntax
test/auxiliary
test/bench
test/run-pass
```

src/test/run-pass/assignability-trait.rs

@@ -39,15 +39,15 @@ pub fn main() {
     // Call a method
     for x.iterate() |y| { assert!(x[*y] == *y); }
     // Call a parameterized function
-    assert!(length(x.clone()) == vec::len(x));
+    assert!(length(x.clone()) == x.len());
     // Call a parameterized function, with type arguments that require
     // a borrow
-    assert!(length::<int, &[int]>(x) == vec::len(x));
+    assert!(length::<int, &[int]>(x) == x.len());
 
     // Now try it with a type that *needs* to be borrowed
     let z = [0,1,2,3];
     // Call a method
     for z.iterate() |y| { assert!(z[*y] == *y); }
     // Call a parameterized function
-    assert!(length::<int, &[int]>(z) == vec::len(z));
+    assert!(length::<int, &[int]>(z) == z.len());
 }

src/test/run-pass/class-implements-multiple-traits.rs

@@ -103,7 +103,7 @@ fn annoy_neighbors<T:noisy>(critter: T) {
 
 fn bite_everything<T:bitey>(critter: T) -> bool {
   let mut left : ~[body_part] = ~[finger, toe, nose, ear];
-  while vec::len(left) > 0u {
+  while left.len() > 0u {
     let part = critter.bite();
     debug!("%? %?", left, part);
     if vec_includes(left, part) {

src/test/run-pass/hashmap-memory.rs

@@ -71,7 +71,7 @@ mod map_reduce {
 
         start_mappers(ctrl_chan, inputs.clone());
 
-        let mut num_mappers = vec::len(inputs) as int;
+        let mut num_mappers = inputs.len() as int;
 
         while num_mappers > 0 {
             match ctrl_port.recv() {

src/test/run-pass/vec-self-append.rs

@@ -14,7 +14,7 @@ fn test_heap_to_heap() {
     // a spills onto the heap
     let mut a = ~[0, 1, 2, 3, 4];
     a = a + a; // FIXME(#3387)---can't write a += a
-    assert!((vec::len(a) == 10u));
+    assert!(a.len() == 10u);
     assert!((a[0] == 0));
     assert!((a[1] == 1));
     assert!((a[2] == 2));
@@ -32,7 +32,7 @@ fn test_stack_to_heap() {
     let mut a = ~[0, 1, 2];
     // a spills to the heap
     a = a + a; // FIXME(#3387)---can't write a += a
-    assert!((vec::len(a) == 6u));
+    assert!(a.len() == 6u);
     assert!((a[0] == 0));
     assert!((a[1] == 1));
     assert!((a[2] == 2));
@@ -47,8 +47,8 @@ fn test_loop() {
     let mut i = 20;
     let mut expected_len = 1u;
     while i > 0 {
-        error!(vec::len(a));
-        assert!((vec::len(a) == expected_len));
+        error!(a.len());
+        assert!(a.len() == expected_len);
         a = a + a; // FIXME(#3387)---can't write a += a
         i -= 1;
         expected_len *= 2u;