Add compile-fail tests for no_prelude

Author: Nemo157

src/test/compile-fail/no-prelude-nested.rs

@@ -0,0 +1,67 @@
+// 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.
+
+#![feature(no_prelude)]
+
+// Test that things from the prelude aren't in scope. Use many of them
+// so that renaming some things won't magically make this test fail
+// for the wrong reason (e.g. if `Add` changes to `Addition`, and
+// `no_prelude` stops working, then the `impl Add` will still
+// fail with the same error message).
+//
+// Unlike `no_implicit_prelude`, `no_prelude` doesn't cascade into nested
+// modules, this makes the impl in foo::baz work.
+
+#[no_prelude]
+mod foo {
+    mod baz {
+        struct Test;
+        impl From<Test> for Test { fn from(t: Test) { Test }}
+        impl Clone for Test { fn clone(&self) { Test } }
+        impl Eq for Test {}
+
+        fn foo() {
+            drop(2)
+        }
+    }
+
+    struct Test;
+    impl From for Test {} //~ ERROR: not in scope
+    impl Clone for Test {} //~ ERROR: not in scope
+    impl Iterator for Test {} //~ ERROR: not in scope
+    impl ToString for Test {} //~ ERROR: not in scope
+    impl Eq for Test {} //~ ERROR: not in scope
+
+    fn foo() {
+        drop(2) //~ ERROR: unresolved name
+    }
+}
+
+fn qux() {
+    #[no_prelude]
+    mod qux_inner {
+        struct Test;
+        impl From for Test {} //~ ERROR: not in scope
+        impl Clone for Test {} //~ ERROR: not in scope
+        impl Iterator for Test {} //~ ERROR: not in scope
+        impl ToString for Test {} //~ ERROR: not in scope
+        impl Eq for Test {} //~ ERROR: not in scope
+
+        fn foo() {
+            drop(2) //~ ERROR: unresolved name
+        }
+    }
+}
+
+
+fn main() {
+    // these should work fine
+    drop(2)
+}

src/test/compile-fail/no-prelude.rs

@@ -0,0 +1,29 @@
+// 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.
+
+#![feature(no_prelude)]
+#![no_prelude]
+
+// Test that things from the prelude aren't in scope. Use many of them
+// so that renaming some things won't magically make this test fail
+// for the wrong reason (e.g. if `Add` changes to `Addition`, and
+// `no_prelude` stops working, then the `impl Add` will still
+// fail with the same error message).
+
+struct Test;
+impl Add for Test {} //~ ERROR: not in scope
+impl Clone for Test {} //~ ERROR: not in scope
+impl Iterator for Test {} //~ ERROR: not in scope
+impl ToString for Test {} //~ ERROR: not in scope
+impl Writer for Test {} //~ ERROR: not in scope
+
+fn main() {
+    drop(2) //~ ERROR: unresolved name
+}