Add proper support for early/late distinction for lifetime bindings.

Uses newly added Vec::partition method to simplify resolve_lifetime.

5 files changed, 175 insertions, 0 deletions

diff --git a/src/test/compile-fail/regions-early-bound-error-method.rs b/src/test/compile-fail/regions-early-bound-error-method.rs
new file mode 100644
index 00000000000..9c8f8f8c30c
--- /dev/null
+++ b/src/test/compile-fail/regions-early-bound-error-method.rs
@@ -0,0 +1,35 @@
+// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Tests that you can use a fn lifetime parameter as part of
+// the value for a type parameter in a bound.
+
+trait GetRef<'a> {
+    fn get(&self) -> &'a int;
+}
+
+struct Box<'a> {
+    t: &'a int
+}
+
+impl<'a> GetRef<'a> for Box<'a> {
+    fn get(&self) -> &'a int {
+        self.t
+    }
+}
+
+impl<'a> Box<'a> {
+    fn or<'b,G:GetRef<'b>>(&self, g2: G) -> &'a int {
+        g2.get() //~ ERROR lifetime mismatch
+    }
+}
+
+fn main() {
+}
diff --git a/src/test/compile-fail/regions-early-bound-error.rs b/src/test/compile-fail/regions-early-bound-error.rs
new file mode 100644
index 00000000000..9cff4849cbe
--- /dev/null
+++ b/src/test/compile-fail/regions-early-bound-error.rs
@@ -0,0 +1,33 @@
+// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Tests that you can use a fn lifetime parameter as part of
+// the value for a type parameter in a bound.
+
+trait GetRef<'a, T> {
+    fn get(&self) -> &'a T;
+}
+
+struct Box<'a, T> {
+    t: &'a T
+}
+
+impl<'a,T:Clone> GetRef<'a,T> for Box<'a,T> {
+    fn get(&self) -> &'a T {
+        self.t
+    }
+}
+
+fn get<'a,'b,G:GetRef<'a, int>>(g1: G, b: &'b int) -> &'b int {
+    g1.get() //~ ERROR lifetime mismatch
+}
+
+fn main() {
+}
diff --git a/src/test/run-pass/regions-early-bound-used-in-bound-method.rs b/src/test/run-pass/regions-early-bound-used-in-bound-method.rs
new file mode 100644
index 00000000000..c011d11749b
--- /dev/null
+++ b/src/test/run-pass/regions-early-bound-used-in-bound-method.rs
@@ -0,0 +1,37 @@
+// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Tests that you can use a fn lifetime parameter as part of
+// the value for a type parameter in a bound.
+
+trait GetRef<'a> {
+    fn get(&self) -> &'a int;
+}
+
+struct Box<'a> {
+    t: &'a int
+}
+
+impl<'a> GetRef<'a> for Box<'a> {
+    fn get(&self) -> &'a int {
+        self.t
+    }
+}
+
+impl<'a> Box<'a> {
+    fn add<'b,G:GetRef<'b>>(&self, g2: G) -> int {
+        *self.t + *g2.get()
+    }
+}
+
+pub fn main() {
+    let b1 = Box { t: &3 };
+    assert_eq!(b1.add(b1), 6);
+}
diff --git a/src/test/run-pass/regions-early-bound-used-in-bound.rs b/src/test/run-pass/regions-early-bound-used-in-bound.rs
new file mode 100644
index 00000000000..22ea87c8d28
--- /dev/null
+++ b/src/test/run-pass/regions-early-bound-used-in-bound.rs
@@ -0,0 +1,35 @@
+// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Tests that you can use a fn lifetime parameter as part of
+// the value for a type parameter in a bound.
+
+trait GetRef<'a, T> {
+    fn get(&self) -> &'a T;
+}
+
+struct Box<'a, T> {
+    t: &'a T
+}
+
+impl<'a,T:Clone> GetRef<'a,T> for Box<'a,T> {
+    fn get(&self) -> &'a T {
+        self.t
+    }
+}
+
+fn add<'a,G:GetRef<'a, int>>(g1: G, g2: G) -> int {
+    *g1.get() + *g2.get()
+}
+
+pub fn main() {
+    let b1 = Box { t: &3 };
+    assert_eq!(add(b1, b1), 6);
+}
diff --git a/src/test/run-pass/regions-early-bound-used-in-type-param.rs b/src/test/run-pass/regions-early-bound-used-in-type-param.rs
new file mode 100644
index 00000000000..592f4822393
--- /dev/null
+++ b/src/test/run-pass/regions-early-bound-used-in-type-param.rs
@@ -0,0 +1,35 @@
+// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Tests that you can use a fn lifetime parameter as part of
+// the value for a type parameter in a bound.
+
+trait Get<T> {
+    fn get(&self) -> T;
+}
+
+struct Box<T> {
+    t: T
+}
+
+impl<T:Clone> Get<T> for Box<T> {
+    fn get(&self) -> T {
+        self.t.clone()
+    }
+}
+
+fn add<'a,G:Get<&'a int>>(g1: G, g2: G) -> int {
+    *g1.get() + *g2.get()
+}
+
+pub fn main() {
+    let b1 = Box { t: &3 };
+    assert_eq!(add(b1, b1), 6);
+}