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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/class/field.carbon
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+4 -4
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@@ -190,11 +190,11 @@ library "[[@TEST_NAME]]";
import Cpp library "unsupported_members.h";
fn Test(m: Cpp.UnsupportedMembers*) {
// CHECK:STDERR: fail_use_unsupported_members.carbon:[[@LINE+4]]:16: note: in `Cpp` name lookup for `is_volatile` [InCppNameLookup]
// CHECK:STDERR: let a: i32 = m->is_volatile;
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR: fail_use_unsupported_members.carbon:[[@LINE+4]]:23: note: in `Cpp` name lookup for `is_volatile` [InCppNameLookup]
// CHECK:STDERR: let unused a: i32 = m->is_volatile;
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR:
let a: i32 = m->is_volatile;
let unused a: i32 = m->is_volatile;
}
// CHECK:STDOUT: --- use_struct_fields.carbon