syntax: implement #[deriving] meta-attribute

src/test/compile-fail/deriving-meta-unknown-trait.rs

@@ -0,0 +1,14 @@
+// Copyright 2013 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.
+
+#[deriving(Eqr)] //~ ERROR unknown `deriving` trait: `Eqr`
+struct Foo;
+
+pub fn main() {}

src/test/run-pass/deriving-meta-empty-trait-list.rs

@@ -0,0 +1,19 @@
+// xfail-pretty
+
+// Copyright 2013 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.
+
+#[deriving]   //~ WARNING empty trait list in `deriving`
+struct Foo;
+
+#[deriving()] //~ WARNING empty trait list in `deriving`
+struct Bar;
+
+pub fn main() {}

src/test/run-pass/deriving-meta-multiple.rs

@@ -0,0 +1,29 @@
+// xfail-fast
+
+// Copyright 2013 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.
+
+#[deriving(Eq)]
+#[deriving(Clone)]
+#[deriving(IterBytes)]
+struct Foo {
+    bar: uint,
+    baz: int
+}
+
+pub fn main() {
+    use core::hash::{Hash, HashUtil}; // necessary for IterBytes check
+
+    let a = Foo {bar: 4, baz: -3};
+
+    a == a;    // check for Eq impl w/o testing its correctness
+    a.clone(); // check for Clone impl w/o testing its correctness
+    a.hash();  // check for IterBytes impl w/o testing its correctness
+}

src/test/run-pass/deriving-meta.rs

@@ -0,0 +1,27 @@
+// xfail-fast
+
+// Copyright 2013 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.
+
+#[deriving(Eq, Clone, IterBytes)]
+struct Foo {
+    bar: uint,
+    baz: int
+}
+
+pub fn main() {
+    use core::hash::{Hash, HashUtil}; // necessary for IterBytes check
+
+    let a = Foo {bar: 4, baz: -3};
+
+    a == a;    // check for Eq impl w/o testing its correctness
+    a.clone(); // check for Clone impl w/o testing its correctness
+    a.hash();  // check for IterBytes impl w/o testing its correctness
+}