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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/impl/interface_args.carbon
Vendored
+4 -4
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@@ -32,7 +32,7 @@ class B {}
class C {}
impl A as Action(B) {
fn Op[self: Self]() {}
fn Op[unused self: Self]() {}
}
fn F(a: A) { a.(Action(B).Op)(); }
@@ -514,9 +514,9 @@ fn InstanceC(a: A) -> C {
// CHECK:STDOUT: %Main.import_ref.450 = import_ref Main//action, inst{{[0-9A-F]+}} [no loc], unloaded
// CHECK:STDOUT: %Main.import_ref.d04: type = import_ref Main//action, loc12_6, loaded [concrete = constants.%A]
// CHECK:STDOUT: %Main.import_ref.5ad: type = import_ref Main//action, loc12_19, loaded [concrete = constants.%Action.type.879]
// CHECK:STDOUT: %Main.import_ref.018 = import_ref Main//action, loc13_23, unloaded
// CHECK:STDOUT: %Main.import_ref.018 = import_ref Main//action, loc13_30, unloaded
// CHECK:STDOUT: %Main.import_ref.04b = import_ref Main//action, loc5_22, unloaded
// CHECK:STDOUT: %Main.import_ref.4e3: %A.as.Action.impl.Op.type = import_ref Main//action, loc13_23, loaded [concrete = constants.%A.as.Action.impl.Op]
// CHECK:STDOUT: %Main.import_ref.4e3: %A.as.Action.impl.Op.type = import_ref Main//action, loc13_30, loaded [concrete = constants.%A.as.Action.impl.Op]
// CHECK:STDOUT: %Action.impl_witness_table = impl_witness_table (%Main.import_ref.4e3), @A.as.Action.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
@@ -706,7 +706,7 @@ fn InstanceC(a: A) -> C {
// CHECK:STDOUT: %Main.import_ref.450 = import_ref Main//action, inst{{[0-9A-F]+}} [no loc], unloaded
// CHECK:STDOUT: %Main.import_ref.d04: type = import_ref Main//action, loc12_6, loaded [concrete = constants.%A]
// CHECK:STDOUT: %Main.import_ref.5ad: type = import_ref Main//action, loc12_19, loaded [concrete = constants.%Action.type.879]
// CHECK:STDOUT: %Main.import_ref.018 = import_ref Main//action, loc13_23, unloaded
// CHECK:STDOUT: %Main.import_ref.018 = import_ref Main//action, loc13_30, unloaded
// CHECK:STDOUT: %Main.import_ref.8f24d3.3: <witness> = import_ref Main//action, loc10_10, loaded [concrete = constants.%complete_type]
// CHECK:STDOUT: %Main.import_ref.743 = import_ref Main//action, inst{{[0-9A-F]+}} [no loc], unloaded
// CHECK:STDOUT: %Main.import_ref.04b = import_ref Main//action, loc5_22, unloaded