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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/interface.cpp
+2 -1
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@@ -139,7 +139,8 @@ auto AddSelfSymbolicBindingToScope(Context& context,
bool is_template) -> SemIR::InstId {
auto entity_name_id = context.entity_names().AddSymbolicBindingName(
SemIR::NameId::SelfType, scope_id,
context.scope_stack().AddCompileTimeBinding(), is_template);
context.scope_stack().AddCompileTimeBinding(), is_template,
/*is_unused=*/false);
// Because there is no equivalent non-symbolic value, we use `None` as
// the `value_id` on the `SymbolicBinding`.
auto self_param_inst_id =