From: jjasmine <tanghocle...@gmail.com>
gcc/rust/ChangeLog:
* checks/errors/rust-feature-gate.cc (FeatureGate::visit): make
gccrs recognize negative_impls
* checks/errors/rust-feature-gate.h: likewise.
* checks/errors/rust-feature.cc (Feature::create): likewise.
* checks/errors/rust-feature.h: likewise.
gcc/testsuite/ChangeLog:
* rust/compile/negative_impls.rs: New test.
* rust/compile/negative_impls_2.rs: New test.
---
gcc/rust/checks/errors/rust-feature-gate.cc | 9 +++++++++
gcc/rust/checks/errors/rust-feature-gate.h | 1 +
gcc/rust/checks/errors/rust-feature.cc | 4 ++++
gcc/rust/checks/errors/rust-feature.h | 1 +
gcc/testsuite/rust/compile/negative_impls.rs | 8 ++++++++
gcc/testsuite/rust/compile/negative_impls_2.rs | 16 ++++++++++++++++
6 files changed, 39 insertions(+)
create mode 100644 gcc/testsuite/rust/compile/negative_impls.rs
create mode 100644 gcc/testsuite/rust/compile/negative_impls_2.rs
diff --git a/gcc/rust/checks/errors/rust-feature-gate.cc
b/gcc/rust/checks/errors/rust-feature-gate.cc
index c20164455c2..6ef2d1f710f 100644
--- a/gcc/rust/checks/errors/rust-feature-gate.cc
+++ b/gcc/rust/checks/errors/rust-feature-gate.cc
@@ -19,6 +19,7 @@
#include "rust-feature-gate.h"
#include "rust-abi.h"
#include "rust-ast-visitor.h"
+#include "rust-feature.h"
namespace Rust {
@@ -144,4 +145,12 @@ FeatureGate::visit (AST::ExternalTypeItem &item)
"extern types are experimental");
}
+void
+FeatureGate::visit (AST::TraitImpl &impl)
+{
+ if (impl.is_exclam ())
+ gate (Feature::Name::NEGATIVE_IMPLS, impl.get_locus (),
+ "negative_impls are not yet implemented");
+};
+
} // namespace Rust
diff --git a/gcc/rust/checks/errors/rust-feature-gate.h
b/gcc/rust/checks/errors/rust-feature-gate.h
index 1782e6d66fb..de48f225598 100644
--- a/gcc/rust/checks/errors/rust-feature-gate.h
+++ b/gcc/rust/checks/errors/rust-feature-gate.h
@@ -127,6 +127,7 @@ public:
void visit (AST::StaticItem &static_item) override {}
void visit (AST::TraitItemConst &item) override {}
void visit (AST::TraitItemType &item) override {}
+ void visit (AST::TraitImpl &impl) override;
void visit (AST::Trait &trait) override {}
void visit (AST::ExternalTypeItem &item) override;
void visit (AST::ExternalStaticItem &item) override {}
diff --git a/gcc/rust/checks/errors/rust-feature.cc
b/gcc/rust/checks/errors/rust-feature.cc
index 92d10650df7..1e11bd541a5 100644
--- a/gcc/rust/checks/errors/rust-feature.cc
+++ b/gcc/rust/checks/errors/rust-feature.cc
@@ -42,6 +42,9 @@ Feature::create (Feature::Name name)
case Feature::Name::EXTERN_TYPES:
return Feature (Feature::Name::EXTERN_TYPES, Feature::State::ACTIVE,
"extern_types", "1.23.0", 43467, tl::nullopt, "");
+ case Feature::Name::NEGATIVE_IMPLS:
+ return Feature (Feature::Name::NEGATIVE_IMPLS, Feature::State::ACTIVE,
+ "negative_impls", "1.0.0", 68318, tl::nullopt, "");
default:
rust_unreachable ();
}
@@ -52,6 +55,7 @@ const std::map<std::string, Feature::Name>
Feature::name_hash_map = {
{"intrinsics", Feature::Name::INTRINSICS},
{"rustc_attrs", Feature::Name::RUSTC_ATTRS},
{"decl_macro", Feature::Name::DECL_MACRO},
+ {"negative_impls", Feature::Name::NEGATIVE_IMPLS},
// TODO: Rename to "auto_traits" when supporting
// later Rust versions
{"optin_builtin_traits", Feature::Name::AUTO_TRAITS},
diff --git a/gcc/rust/checks/errors/rust-feature.h
b/gcc/rust/checks/errors/rust-feature.h
index 8eefb0f9754..611dceaa2c9 100644
--- a/gcc/rust/checks/errors/rust-feature.h
+++ b/gcc/rust/checks/errors/rust-feature.h
@@ -39,6 +39,7 @@ public:
{
ASSOCIATED_TYPE_BOUNDS,
INTRINSICS,
+ NEGATIVE_IMPLS,
RUSTC_ATTRS,
DECL_MACRO,
AUTO_TRAITS,
diff --git a/gcc/testsuite/rust/compile/negative_impls.rs
b/gcc/testsuite/rust/compile/negative_impls.rs
new file mode 100644
index 00000000000..949a3906cdc
--- /dev/null
+++ b/gcc/testsuite/rust/compile/negative_impls.rs
@@ -0,0 +1,8 @@
+#![feature(negative_impls)]
+
+trait ExampleTrait {}
+
+impl !ExampleTrait for i32 {}
+
+
+fn main() {}
diff --git a/gcc/testsuite/rust/compile/negative_impls_2.rs
b/gcc/testsuite/rust/compile/negative_impls_2.rs
new file mode 100644
index 00000000000..d66fbc9c36b
--- /dev/null
+++ b/gcc/testsuite/rust/compile/negative_impls_2.rs
@@ -0,0 +1,16 @@
+// This test case should error out since we haven't included the
negative_impls feature
+// Output from online rust compiler 2021 ver
+// Compiling playground v0.0.1 (/playground)
+// error[E0658]: negative trait bounds are not yet fully implemented; use
marker types for now
+// --> src/main.rs:8:6
+// |
+// 8 | impl !ExampleTrait for i32 {}//
+// | ^^^^^^^^^^^^^
+// |
+// = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318>
for more information
+
+// For more information about this error, try `rustc --explain E0658`.
+// error: could not compile `playground` (bin "playground") due to 1 previous
error
+trait ExampleTrait {}
+
+impl !ExampleTrait for i32 {} // { dg-error "negative_impls are not yet
implemented" }
\ No newline at end of file
--
2.45.2
