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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/fail_impl_as_scope.carbon
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@@ -56,14 +56,14 @@ interface Z {
// CHECK:STDERR:
impl as Z {
fn Zero() {}
fn Method[self: Self]() {}
fn Method[unused self: Self]() {}
}
}
class Point {
impl as Z {
fn Zero() {}
fn Method[self: Self]() {}
fn Method[unused self: Self]() {}
}
}
@@ -346,10 +346,10 @@ class X {
// CHECK:STDOUT: %self.param_patt: @<error>.as.Z.impl.Method.%pattern_type (%pattern_type.84b) = value_param_pattern %self.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %self.param: @<error>.as.Z.impl.Method.%Self.binding.as_type (%Self.binding.as_type.62d) = value_param call_param0
// CHECK:STDOUT: %.loc13_21.1: type = splice_block %.loc13_21.2 [symbolic = %Self.binding.as_type (constants.%Self.binding.as_type.62d)] {
// CHECK:STDOUT: %.loc13_28.1: type = splice_block %.loc13_28.2 [symbolic = %Self.binding.as_type (constants.%Self.binding.as_type.62d)] {
// CHECK:STDOUT: %Self.ref: %Z.type = name_ref Self, @Z.%Self.loc3 [symbolic = %Self (constants.%Self.c59)]
// CHECK:STDOUT: %Self.as_type: type = facet_access_type %Self.ref [symbolic = %Self.binding.as_type (constants.%Self.binding.as_type.62d)]
// CHECK:STDOUT: %.loc13_21.2: type = converted %Self.ref, %Self.as_type [symbolic = %Self.binding.as_type (constants.%Self.binding.as_type.62d)]
// CHECK:STDOUT: %.loc13_28.2: type = converted %Self.ref, %Self.as_type [symbolic = %Self.binding.as_type (constants.%Self.binding.as_type.62d)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %self: @<error>.as.Z.impl.Method.%Self.binding.as_type (%Self.binding.as_type.62d) = value_binding self, %self.param
// CHECK:STDOUT: }