librustc: Ensure that type parameters are in the right positions in paths.

This removes the stacking of type parameters that occurs when invoking
trait methods, and fixes all places in the standard library that were
relying on it. It is somewhat awkward in places; I think we'll probably
want something like the `Foo::<for T>::new()` syntax.

Author: pcwalton

src/libextra/dlist.rs

@@ -661,7 +661,7 @@ mod tests {
 
     #[test]
     fn test_basic() {
-        let mut m = DList::new::<~int>();
+        let mut m: DList<~int> = DList::new();
         assert_eq!(m.pop_front(), None);
         assert_eq!(m.pop_back(), None);
         assert_eq!(m.pop_front(), None);
@@ -768,7 +768,7 @@ mod tests {
 
     #[test]
     fn test_rotate() {
-        let mut n = DList::new::<int>();
+        let mut n: DList<int> = DList::new();
         n.rotate_backward(); check_links(&n);
         assert_eq!(n.len(), 0);
         n.rotate_forward(); check_links(&n);
@@ -1033,7 +1033,7 @@ mod tests {
 
     #[cfg(test)]
     fn fuzz_test(sz: int) {
-        let mut m = DList::new::<int>();
+        let mut m: DList<int> = DList::new();
         let mut v = ~[];
         for i in range(0, sz) {
             check_links(&m);
@@ -1078,23 +1078,23 @@ mod tests {
 
     #[bench]
     fn bench_push_front(b: &mut test::BenchHarness) {
-        let mut m = DList::new::<int>();
+        let mut m: DList<int> = DList::new();
         do b.iter {
             m.push_front(0);
         }
     }
 
     #[bench]
     fn bench_push_back(b: &mut test::BenchHarness) {
-        let mut m = DList::new::<int>();
+        let mut m: DList<int> = DList::new();
         do b.iter {
             m.push_back(0);
         }
     }
 
     #[bench]
     fn bench_push_back_pop_back(b: &mut test::BenchHarness) {
-        let mut m = DList::new::<int>();
+        let mut m: DList<int> = DList::new();
         do b.iter {
             m.push_back(0);
             m.pop_back();
@@ -1103,7 +1103,7 @@ mod tests {
 
     #[bench]
     fn bench_push_front_pop_front(b: &mut test::BenchHarness) {
-        let mut m = DList::new::<int>();
+        let mut m: DList<int> = DList::new();
         do b.iter {
             m.push_front(0);
             m.pop_front();
@@ -1112,7 +1112,7 @@ mod tests {
 
     #[bench]
     fn bench_rotate_forward(b: &mut test::BenchHarness) {
-        let mut m = DList::new::<int>();
+        let mut m: DList<int> = DList::new();
         m.push_front(0);
         m.push_front(1);
         do b.iter {
@@ -1122,7 +1122,7 @@ mod tests {
 
     #[bench]
     fn bench_rotate_backward(b: &mut test::BenchHarness) {
-        let mut m = DList::new::<int>();
+        let mut m: DList<int> = DList::new();
         m.push_front(0);
         m.push_front(1);
         do b.iter {

src/libextra/num/bigint.rs

@@ -359,7 +359,7 @@ impl Integer for BigUint {
 
         fn div_mod_floor_inner(a: BigUint, b: BigUint) -> (BigUint, BigUint) {
             let mut m = a;
-            let mut d = Zero::zero::<BigUint>();
+            let mut d: BigUint = Zero::zero();
             let mut n = 1;
             while m >= b {
                 let (d0, d_unit, b_unit) = div_estimate(&m, &b, n);
@@ -411,8 +411,9 @@ impl Integer for BigUint {
             if shift == 0 {
                 return (BigUint::new(d), One::one(), (*b).clone());
             }
+            let one: BigUint = One::one();
             return (BigUint::from_slice(d).shl_unit(shift),
-                    One::one::<BigUint>().shl_unit(shift),
+                    one.shl_unit(shift),
                     b.shl_unit(shift));
         }
     }
@@ -1445,11 +1446,18 @@ mod biguint_tests {
 
     #[test]
     fn test_is_even() {
-        assert!(FromStr::from_str::<BigUint>("1").unwrap().is_odd());
-        assert!(FromStr::from_str::<BigUint>("2").unwrap().is_even());
-        assert!(FromStr::from_str::<BigUint>("1000").unwrap().is_even());
-        assert!(FromStr::from_str::<BigUint>("1000000000000000000000").unwrap().is_even());
-        assert!(FromStr::from_str::<BigUint>("1000000000000000000001").unwrap().is_odd());
+        let one: Option<BigUint> = FromStr::from_str("1");
+        let two: Option<BigUint> = FromStr::from_str("2");
+        let thousand: Option<BigUint> = FromStr::from_str("1000");
+        let big: Option<BigUint> =
+            FromStr::from_str("1000000000000000000000");
+        let bigger: Option<BigUint> =
+            FromStr::from_str("1000000000000000000001");
+        assert!(one.unwrap().is_odd());
+        assert!(two.unwrap().is_even());
+        assert!(thousand.unwrap().is_even());
+        assert!(big.unwrap().is_even());
+        assert!(bigger.unwrap().is_odd());
         assert!((BigUint::from_uint(1) << 64).is_even());
         assert!(((BigUint::from_uint(1) << 64) + BigUint::from_uint(1)).is_odd());
     }
@@ -1534,15 +1542,19 @@ mod biguint_tests {
             }
         }
 
-        assert_eq!(FromStrRadix::from_str_radix::<BigUint>("Z", 10), None);
-        assert_eq!(FromStrRadix::from_str_radix::<BigUint>("_", 2), None);
-        assert_eq!(FromStrRadix::from_str_radix::<BigUint>("-1", 10), None);
+        let zed: Option<BigUint> = FromStrRadix::from_str_radix("Z", 10);
+        assert_eq!(zed, None);
+        let blank: Option<BigUint> = FromStrRadix::from_str_radix("_", 2);
+        assert_eq!(blank, None);
+        let minus_one: Option<BigUint> = FromStrRadix::from_str_radix("-1",
+                                                                      10);
+        assert_eq!(minus_one, None);
     }
 
     #[test]
     fn test_factor() {
         fn factor(n: uint) -> BigUint {
-            let mut f= One::one::<BigUint>();
+            let mut f: BigUint = One::one();
             for i in range(2, n + 1) {
                 // FIXME(#6102): Assignment operator for BigInt causes ICE
                 // f *= BigUint::from_uint(i);
@@ -1939,17 +1951,24 @@ mod bigint_tests {
 
     #[test]
     fn test_abs_sub() {
-        assert_eq!((-One::one::<BigInt>()).abs_sub(&One::one()), Zero::zero());
-        assert_eq!(One::one::<BigInt>().abs_sub(&One::one()), Zero::zero());
-        assert_eq!(One::one::<BigInt>().abs_sub(&Zero::zero()), One::one());
-        assert_eq!(One::one::<BigInt>().abs_sub(&-One::one::<BigInt>()),
-                   IntConvertible::from_int(2));
+        let zero: BigInt = Zero::zero();
+        let one: BigInt = One::one();
+        assert_eq!((-one).abs_sub(&one), zero);
+        let one: BigInt = One::one();
+        let zero: BigInt = Zero::zero();
+        assert_eq!(one.abs_sub(&one), zero);
+        let one: BigInt = One::one();
+        let zero: BigInt = Zero::zero();
+        assert_eq!(one.abs_sub(&zero), one);
+        let one: BigInt = One::one();
+        assert_eq!(one.abs_sub(&-one), IntConvertible::from_int(2));
     }
 
     #[test]
     fn test_to_str_radix() {
         fn check(n: int, ans: &str) {
-            assert!(ans == IntConvertible::from_int::<BigInt>(n).to_str_radix(10));
+            let n: BigInt = IntConvertible::from_int(n);
+            assert!(ans == n.to_str_radix(10));
         }
         check(10, "10");
         check(1, "1");
@@ -1962,7 +1981,10 @@ mod bigint_tests {
     #[test]
     fn test_from_str_radix() {
         fn check(s: &str, ans: Option<int>) {
-            let ans = ans.map_move(|n| IntConvertible::from_int::<BigInt>(n));
+            let ans = ans.map_move(|n| {
+                let x: BigInt = IntConvertible::from_int(n);
+                x
+            });
             assert_eq!(FromStrRadix::from_str_radix(s, 10), ans);
         }
         check("10", Some(10));
@@ -1980,7 +2002,8 @@ mod bigint_tests {
             BigInt::new(Minus, ~[1, 1, 1]));
         assert!(-BigInt::new(Minus, ~[1, 1, 1]) ==
             BigInt::new(Plus,  ~[1, 1, 1]));
-        assert_eq!(-Zero::zero::<BigInt>(), Zero::zero::<BigInt>());
+        let zero: BigInt = Zero::zero();
+        assert_eq!(-zero, zero);
     }
 }
 

src/libextra/num/rational.rs

@@ -269,9 +269,13 @@ impl<T: FromStr + Clone + Integer + Ord>
     /// Parses `numer/denom`.
     fn from_str(s: &str) -> Option<Ratio<T>> {
         let split: ~[&str] = s.splitn_iter('/', 1).collect();
-        if split.len() < 2 { return None; }
-        do FromStr::from_str::<T>(split[0]).chain |a| {
-            do FromStr::from_str::<T>(split[1]).chain |b| {
+        if split.len() < 2 {
+            return None
+        }
+        let a_option: Option<T> = FromStr::from_str(split[0]);
+        do a_option.chain |a| {
+            let b_option: Option<T> = FromStr::from_str(split[1]);
+            do b_option.chain |b| {
                 Some(Ratio::new(a.clone(), b.clone()))
             }
         }
@@ -282,10 +286,15 @@ impl<T: FromStrRadix + Clone + Integer + Ord>
     /// Parses `numer/denom` where the numbers are in base `radix`.
     fn from_str_radix(s: &str, radix: uint) -> Option<Ratio<T>> {
         let split: ~[&str] = s.splitn_iter('/', 1).collect();
-        if split.len() < 2 { None }
-        else {
-            do FromStrRadix::from_str_radix::<T>(split[0], radix).chain |a| {
-                do FromStrRadix::from_str_radix::<T>(split[1], radix).chain |b| {
+        if split.len() < 2 {
+            None
+        } else {
+            let a_option: Option<T> = FromStrRadix::from_str_radix(split[0],
+                                                                   radix);
+            do a_option.chain |a| {
+                let b_option: Option<T> =
+                    FromStrRadix::from_str_radix(split[1], radix);
+                do b_option.chain |b| {
                     Some(Ratio::new(a.clone(), b.clone()))
                 }
             }
@@ -496,7 +505,8 @@ mod test {
     #[test]
     fn test_from_str_fail() {
         fn test(s: &str) {
-            assert_eq!(FromStr::from_str::<Rational>(s), None);
+            let rational: Option<Rational> = FromStr::from_str(s);
+            assert_eq!(rational, None);
         }
 
         let xs = ["0 /1", "abc", "", "1/", "--1/2","3/2/1"];
@@ -536,7 +546,8 @@ mod test {
     #[test]
     fn test_from_str_radix_fail() {
         fn test(s: &str) {
-            assert_eq!(FromStrRadix::from_str_radix::<Rational>(s, 3), None);
+            let radix: Option<Rational> = FromStrRadix::from_str_radix(s, 3);
+            assert_eq!(radix, None);
         }
 
         let xs = ["0 /1", "abc", "", "1/", "--1/2","3/2/1", "3/2"];

src/libextra/priority_queue.rs

@@ -338,27 +338,36 @@ mod tests {
 
     #[test]
     #[should_fail]
-    fn test_empty_pop() { let mut heap = PriorityQueue::new::<int>(); heap.pop(); }
+    fn test_empty_pop() {
+        let mut heap: PriorityQueue<int> = PriorityQueue::new();
+        heap.pop();
+    }
 
     #[test]
     fn test_empty_maybe_pop() {
-        let mut heap = PriorityQueue::new::<int>();
+        let mut heap: PriorityQueue<int> = PriorityQueue::new();
         assert!(heap.maybe_pop().is_none());
     }
 
     #[test]
     #[should_fail]
-    fn test_empty_top() { let empty = PriorityQueue::new::<int>(); empty.top(); }
+    fn test_empty_top() {
+        let empty: PriorityQueue<int> = PriorityQueue::new();
+        empty.top();
+    }
 
     #[test]
     fn test_empty_maybe_top() {
-        let empty = PriorityQueue::new::<int>();
+        let empty: PriorityQueue<int> = PriorityQueue::new();
         assert!(empty.maybe_top().is_none());
     }
 
     #[test]
     #[should_fail]
-    fn test_empty_replace() { let mut heap = PriorityQueue::new(); heap.replace(5); }
+    fn test_empty_replace() {
+        let mut heap: PriorityQueue<int> = PriorityQueue::new();
+        heap.replace(5);
+    }
 
     #[test]
     fn test_from_iter() {

src/libextra/ringbuf.rs

@@ -483,7 +483,7 @@ mod tests {
     #[bench]
     fn bench_new(b: &mut test::BenchHarness) {
         do b.iter {
-            let _ = RingBuf::new::<u64>();
+            let _: RingBuf<u64> = RingBuf::new();
         }
     }
 

src/libextra/treemap.rs

@@ -879,7 +879,8 @@ mod test_treemap {
 
     #[test]
     fn find_empty() {
-        let m = TreeMap::new::<int, int>(); assert!(m.find(&5) == None);
+        let m: TreeMap<int,int> = TreeMap::new();
+        assert!(m.find(&5) == None);
     }
 
     #[test]
@@ -1006,7 +1007,7 @@ mod test_treemap {
 
     #[test]
     fn test_rand_int() {
-        let mut map = TreeMap::new::<int, int>();
+        let mut map: TreeMap<int,int> = TreeMap::new();
         let mut ctrl = ~[];
 
         check_equal(ctrl, &map);

src/librustc/front/test.rs

@@ -387,7 +387,7 @@ fn path_node(ids: ~[ast::ident]) -> ast::Path {
     ast::Path {
         span: dummy_sp(),
         global: false,
-        segments: ids.consume_iter().transform(|identifier| ast::PathSegment {
+        segments: ids.move_iter().map(|identifier| ast::PathSegment {
             identifier: identifier,
             lifetime: None,
             types: opt_vec::Empty,
@@ -399,7 +399,7 @@ fn path_node_global(ids: ~[ast::ident]) -> ast::Path {
     ast::Path {
         span: dummy_sp(),
         global: true,
-        segments: ids.consume_iter().transform(|identifier| ast::PathSegment {
+        segments: ids.move_iter().map(|identifier| ast::PathSegment {
             identifier: identifier,
             lifetime: None,
             types: opt_vec::Empty,

src/librustc/metadata/decoder.rs

@@ -335,15 +335,19 @@ fn item_to_def_like(item: ebml::Doc, did: ast::def_id, cnum: ast::CrateNum)
             let purity = if fam == UnsafeStaticMethod { ast::unsafe_fn } else
                 { ast::impure_fn };
             // def_static_method carries an optional field of its enclosing
-            // *trait*, but not an inclosing Impl (if this is an inherent
-            // static method). So we need to detect whether this is in
-            // a trait or not, which we do through the mildly hacky
-            // way of checking whether there is a trait_method_sort.
-            let trait_did_opt = if reader::maybe_get_doc(
+            // trait or enclosing impl (if this is an inherent static method).
+            // So we need to detect whether this is in a trait or not, which
+            // we do through the mildly hacky way of checking whether there is
+            // a trait_method_sort.
+            let provenance = if reader::maybe_get_doc(
                   item, tag_item_trait_method_sort).is_some() {
-                Some(item_reqd_and_translated_parent_item(cnum, item))
-            } else { None };
-            dl_def(ast::def_static_method(did, trait_did_opt, purity))
+                ast::FromTrait(item_reqd_and_translated_parent_item(cnum,
+                                                                    item))
+            } else {
+                ast::FromImpl(item_reqd_and_translated_parent_item(cnum,
+                                                                   item))
+            };
+            dl_def(ast::def_static_method(did, provenance, purity))
         }
         Type | ForeignType => dl_def(ast::def_ty(did)),
         Mod => dl_def(ast::def_mod(did)),

src/librustc/metadata/tydecode.rs

@@ -141,7 +141,7 @@ fn parse_path(st: &mut PState) -> @ast::Path {
                 return @ast::Path {
                     span: dummy_sp(),
                     global: false,
-                    segments: idents.consume_iter().transform(|identifier| {
+                    segments: idents.move_iter().map(|identifier| {
                         ast::PathSegment {
                             identifier: identifier,
                             lifetime: None,