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Implement unused pattern bindings, continued (#6518)

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Implementation of unused pattern bindings #2022, continued.

Whereas previous PR #6460 took care of parsing, and PR #6479 prepared
the stage by using _ in some test cases, this PR has the the actual
implementation, using a simple dataflow analysis.

---------

Co-authored-by: Burak Emir <bqe@google.com>
Co-authored-by: jonmeow <jperkins@google.com>
This commit is contained in:
Burak Emir
2026-02-19 23:33:36 +00:00
committed by GitHub
co-authored by Burak Emir jonmeow
parent bea24a8bee
commit fdb188ccfd
366 changed files with 8453 additions and 7996 deletions
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toolchain/check/testdata/interop/cpp/template/generic_call.carbon
Vendored
+5 -5
View File
@@ -23,14 +23,14 @@ library "[[@TEST_NAME]]";
import Cpp library "header.h";
fn F[T:! type](x: T) {
fn F[T:! type](unused x: T) {
// TODO: This should be treated as being template-dependent on T,
// and we should perform the call during monomorphization.
// CHECK:STDERR: fail_todo_generic_call.carbon:[[@LINE+4]]:16: error: semantics TODO: `unsupported type used as template argument` [SemanticsTodo]
// CHECK:STDERR: var v: Cpp.S(T);
// CHECK:STDERR: ^
// CHECK:STDERR: fail_todo_generic_call.carbon:[[@LINE+4]]:23: error: semantics TODO: `unsupported type used as template argument` [SemanticsTodo]
// CHECK:STDERR: var unused v: Cpp.S(T);
// CHECK:STDERR: ^
// CHECK:STDERR:
var v: Cpp.S(T);
var unused v: Cpp.S(T);
}
fn G() {
toolchain/check/testdata/interop/cpp/template/non_type_param.carbon
Vendored
+1 -1
View File
@@ -59,7 +59,7 @@ import Cpp library "templates.h";
class C { adapt {}; }
impl C as Core.ImplicitAs(i32) {
eval fn Convert[self: Self]() -> i32 { return 123; }
eval fn Convert[unused self: Self]() -> i32 { return 123; }
}
var s: Cpp.Simple({} as C) = Cpp.MakeSimple123();