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fdb188ccfd
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>
42 lines
1.7 KiB
C++
42 lines
1.7 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef CARBON_TOOLCHAIN_CHECK_RETURN_H_
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#define CARBON_TOOLCHAIN_CHECK_RETURN_H_
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#include "toolchain/check/context.h"
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#include "toolchain/parse/node_ids.h"
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namespace Carbon::Check {
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// Gets the function that a `return` statement in the current context would
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// return from.
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auto GetCurrentFunctionForReturn(Context& context) -> SemIR::Function&;
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// Gets the return parameter corresponding to `function`'s `returned var`.
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// Returns None if the `returned var` doesn't correspond to a return parameter
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// (e.g. because it doesn't have an in-place init representation).
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auto GetReturnedVarParam(Context& context, const SemIR::Function& function)
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-> SemIR::InstId;
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// Checks a `returned var` binding and registers it as the current `returned
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// var` in this scope.
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auto RegisterReturnedVar(Context& context, Parse::NodeId returned_node,
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Parse::NodeId type_node, SemIR::TypeId type_id,
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SemIR::InstId bind_id, SemIR::NameId name_id) -> void;
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// Checks and builds SemIR for a `return;` statement.
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auto BuildReturnWithNoExpr(Context& context, SemIR::LocId loc_id) -> void;
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// Checks and builds SemIR for a `return <expression>;` statement.
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auto BuildReturnWithExpr(Context& context, SemIR::LocId loc_id,
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SemIR::InstId expr_id) -> void;
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// Checks and builds SemIR for a `return var;` statement.
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auto BuildReturnVar(Context& context, Parse::ReturnStatementId node_id) -> void;
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} // namespace Carbon::Check
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#endif // CARBON_TOOLCHAIN_CHECK_RETURN_H_
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