Generic unit tests for attributes on lifetime/type formals in generics list.

Author: pnkfelix

src/test/compile-fail/attr-on-generic-formals-are-visited.rs

@@ -0,0 +1,75 @@
+// Copyright 2016 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.
+
+// This test ensures that attributes on formals in generic parameter
+// lists are included when we are checking for unstable attributes.
+//
+// Note that feature(generic_param_attrs) *is* enabled here. We are
+// checking feature-gating of the attributes themselves, not the
+// capability to parse such attributes in that context.
+
+#![feature(generic_param_attrs)]
+#![allow(dead_code)]
+
+struct StLt<#[lt_struct] 'a>(&'a u32);
+//~^ ERROR The attribute `lt_struct` is currently unknown to the compiler
+struct StTy<#[ty_struct] I>(I);
+//~^ ERROR The attribute `ty_struct` is currently unknown to the compiler
+
+enum EnLt<#[lt_enum] 'b> { A(&'b u32), B }
+//~^ ERROR The attribute `lt_enum` is currently unknown to the compiler
+enum EnTy<#[ty_enum] J> { A(J), B }
+//~^ ERROR The attribute `ty_enum` is currently unknown to the compiler
+
+trait TrLt<#[lt_trait] 'c> { fn foo(&self, _: &'c [u32]) -> &'c u32; }
+//~^ ERROR The attribute `lt_trait` is currently unknown to the compiler
+trait TrTy<#[ty_trait] K> { fn foo(&self, _: K); }
+//~^ ERROR The attribute `ty_trait` is currently unknown to the compiler
+
+type TyLt<#[lt_type] 'd> = &'d u32;
+//~^ ERROR The attribute `lt_type` is currently unknown to the compiler
+type TyTy<#[ty_type] L> = (L, );
+//~^ ERROR The attribute `ty_type` is currently unknown to the compiler
+
+impl<#[lt_inherent] 'e> StLt<'e> { }
+//~^ ERROR The attribute `lt_inherent` is currently unknown to the compiler
+impl<#[ty_inherent] M> StTy<M> { }
+//~^ ERROR The attribute `ty_inherent` is currently unknown to the compiler
+
+impl<#[lt_impl_for] 'f> TrLt<'f> for StLt<'f> {
+    //~^ ERROR The attribute `lt_impl_for` is currently unknown to the compiler
+    fn foo(&self, _: &'f [u32]) -> &'f u32 { loop { } }
+}
+impl<#[ty_impl_for] N> TrTy<N> for StTy<N> {
+    //~^ ERROR The attribute `ty_impl_for` is currently unknown to the compiler
+    fn foo(&self, _: N) { }
+}
+
+fn f_lt<#[lt_fn] 'g>(_: &'g [u32]) -> &'g u32 { loop { } }
+//~^ ERROR The attribute `lt_fn` is currently unknown to the compiler
+fn f_ty<#[ty_fn] O>(_: O) { }
+//~^ ERROR The attribute `ty_fn` is currently unknown to the compiler
+
+impl<I> StTy<I> {
+    fn m_lt<#[lt_meth] 'h>(_: &'h [u32]) -> &'h u32 { loop { } }
+    //~^ ERROR The attribute `lt_meth` is currently unknown to the compiler
+    fn m_ty<#[ty_meth] P>(_: P) { }
+    //~^ ERROR The attribute `ty_meth` is currently unknown to the compiler
+}
+
+fn hof_lt<Q>(_: Q)
+    where Q: for <#[lt_hof] 'i> Fn(&'i [u32]) -> &'i u32
+    //~^ ERROR The attribute `lt_hof` is currently unknown to the compiler
+{
+}
+
+fn main() {
+
+}

src/test/compile-fail/attr-on-generic-formals-wo-feature-gate.rs

@@ -0,0 +1,76 @@
+// Copyright 2016 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.
+
+// This test ensures that attributes on formals in generic parameter
+// lists are rejected if feature(generic_param_attrs) is not enabled.
+//
+// (We are prefixing all tested features with `rustc_`, to ensure that
+// the attributes themselves won't be rejected by the compiler when
+// using `rustc_attrs` feature. There is a separate compile-fail/ test
+// ensuring that the attribute feature-gating works in this context.)
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+struct StLt<#[rustc_lt_struct] 'a>(&'a u32);
+//~^ ERROR attributes on lifetime bindings are experimental (see issue #34761)
+struct StTy<#[rustc_ty_struct] I>(I);
+//~^ ERROR attributes on type parameter bindings are experimental (see issue #34761)
+
+enum EnLt<#[rustc_lt_enum] 'b> { A(&'b u32), B }
+//~^ ERROR attributes on lifetime bindings are experimental (see issue #34761)
+enum EnTy<#[rustc_ty_enum] J> { A(J), B }
+//~^ ERROR attributes on type parameter bindings are experimental (see issue #34761)
+
+trait TrLt<#[rustc_lt_trait] 'c> { fn foo(&self, _: &'c [u32]) -> &'c u32; }
+//~^ ERROR attributes on lifetime bindings are experimental (see issue #34761)
+trait TrTy<#[rustc_ty_trait] K> { fn foo(&self, _: K); }
+//~^ ERROR attributes on type parameter bindings are experimental (see issue #34761)
+
+type TyLt<#[rustc_lt_type] 'd> = &'d u32;
+//~^ ERROR attributes on lifetime bindings are experimental (see issue #34761)
+type TyTy<#[rustc_ty_type] L> = (L, );
+//~^ ERROR attributes on type parameter bindings are experimental (see issue #34761)
+
+impl<#[rustc_lt_inherent] 'e> StLt<'e> { }
+//~^ ERROR attributes on lifetime bindings are experimental (see issue #34761)
+impl<#[rustc_ty_inherent] M> StTy<M> { }
+//~^ ERROR attributes on type parameter bindings are experimental (see issue #34761)
+
+impl<#[rustc_lt_impl_for] 'f> TrLt<'f> for StLt<'f> {
+    //~^ ERROR attributes on lifetime bindings are experimental (see issue #34761)
+    fn foo(&self, _: &'f [u32]) -> &'f u32 { loop { } }
+}
+impl<#[rustc_ty_impl_for] N> TrTy<N> for StTy<N> {
+    //~^ ERROR attributes on type parameter bindings are experimental (see issue #34761)
+    fn foo(&self, _: N) { }
+}
+
+fn f_lt<#[rustc_lt_fn] 'g>(_: &'g [u32]) -> &'g u32 { loop { } }
+//~^ ERROR attributes on lifetime bindings are experimental (see issue #34761)
+fn f_ty<#[rustc_ty_fn] O>(_: O) { }
+//~^ ERROR attributes on type parameter bindings are experimental (see issue #34761)
+
+impl<I> StTy<I> {
+    fn m_lt<#[rustc_lt_meth] 'h>(_: &'h [u32]) -> &'h u32 { loop { } }
+    //~^ ERROR attributes on lifetime bindings are experimental (see issue #34761)
+    fn m_ty<#[rustc_ty_meth] P>(_: P) { }
+    //~^ ERROR attributes on type parameter bindings are experimental (see issue #34761)
+}
+
+fn hof_lt<Q>(_: Q)
+    where Q: for <#[rustc_lt_hof] 'i> Fn(&'i [u32]) -> &'i u32
+    //~^ ERROR attributes on lifetime bindings are experimental (see issue #34761)
+{
+}
+
+fn main() {
+
+}

src/test/run-pass/attr-on-generic-formals.rs

@@ -0,0 +1,60 @@
+// Copyright 2016 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.
+
+// This test ensures we can attach attributes to the formals in all
+// places where generic parameter lists occur, assuming appropriate
+// feature gates are enabled.
+//
+// (We are prefixing all tested features with `rustc_`, to ensure that
+// the attributes themselves won't be rejected by the compiler when
+// using `rustc_attrs` feature. There is a separate compile-fail/ test
+// ensuring that the attribute feature-gating works in this context.)
+
+#![feature(generic_param_attrs, rustc_attrs)]
+#![allow(dead_code)]
+
+struct StLt<#[rustc_lt_struct] 'a>(&'a u32);
+struct StTy<#[rustc_ty_struct] I>(I);
+
+enum EnLt<#[rustc_lt_enum] 'b> { A(&'b u32), B }
+enum EnTy<#[rustc_ty_enum] J> { A(J), B }
+
+trait TrLt<#[rustc_lt_trait] 'c> { fn foo(&self, _: &'c [u32]) -> &'c u32; }
+trait TrTy<#[rustc_ty_trait] K> { fn foo(&self, _: K); }
+
+type TyLt<#[rustc_lt_type] 'd> = &'d u32;
+type TyTy<#[rustc_ty_type] L> = (L, );
+
+impl<#[rustc_lt_inherent] 'e> StLt<'e> { }
+impl<#[rustc_ty_inherent] M> StTy<M> { }
+
+impl<#[rustc_lt_impl_for] 'f> TrLt<'f> for StLt<'f> {
+    fn foo(&self, _: &'f [u32]) -> &'f u32 { loop { } }
+}
+impl<#[rustc_ty_impl_for] N> TrTy<N> for StTy<N> {
+    fn foo(&self, _: N) { }
+}
+
+fn f_lt<#[rustc_lt_fn] 'g>(_: &'g [u32]) -> &'g u32 { loop { } }
+fn f_ty<#[rustc_ty_fn] O>(_: O) { }
+
+impl<I> StTy<I> {
+    fn m_lt<#[rustc_lt_meth] 'h>(_: &'h [u32]) -> &'h u32 { loop { } }
+    fn m_ty<#[rustc_ty_meth] P>(_: P) { }
+}
+
+fn hof_lt<Q>(_: Q)
+    where Q: for <#[rustc_lt_hof] 'i> Fn(&'i [u32]) -> &'i u32
+{
+}
+
+fn main() {
+
+}