From: Nobel Singh <[email protected]>
Fixes issue #2040
Add check to assure that a function cant be declared const inside trait impl
blocks.
gcc/rust/ChangeLog:
* checks/errors/rust-ast-validation.cc (ASTValidation::visit): Add
check for const funtion.
gcc/testsuite/ChangeLog:
* rust/compile/issue-2040.rs: New test.
Signed-off-by: Nobel Singh <[email protected]>
---
gcc/rust/checks/errors/rust-ast-validation.cc | 4 ++++
gcc/testsuite/rust/compile/issue-2040.rs | 12 ++++++++++++
2 files changed, 16 insertions(+)
create mode 100644 gcc/testsuite/rust/compile/issue-2040.rs
diff --git a/gcc/rust/checks/errors/rust-ast-validation.cc
b/gcc/rust/checks/errors/rust-ast-validation.cc
index 6fb142c7845..cd197fc1ea7 100644
--- a/gcc/rust/checks/errors/rust-ast-validation.cc
+++ b/gcc/rust/checks/errors/rust-ast-validation.cc
@@ -103,6 +103,10 @@ ASTValidation::visit (AST::Function &function)
rust_error_at (function.get_locus (),
"functions cannot be both %<const%> and %<async%>");
+ if (qualifiers.is_const () && context.back () == Context::TRAIT_IMPL)
+ rust_error_at (function.get_locus (), ErrorCode::E0379,
+ "functions in traits cannot be declared const");
+
if (valid_context.find (context.back ()) == valid_context.end ()
&& function.has_self_param ())
rust_error_at (
diff --git a/gcc/testsuite/rust/compile/issue-2040.rs
b/gcc/testsuite/rust/compile/issue-2040.rs
new file mode 100644
index 00000000000..fbac168b9f3
--- /dev/null
+++ b/gcc/testsuite/rust/compile/issue-2040.rs
@@ -0,0 +1,12 @@
+trait Foo {
+ fn f() -> u32;
+}
+
+impl Foo for u32 {
+ const fn f() -> u32 {
+ // { dg-error "functions in traits cannot be declared const" "" {
target *-*-* } .-1 }
+ 22
+ }
+}
+
+fn main() {}
--
2.42.1
