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https://github.com/carbon-language/carbon-lang.git
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Richard Smith
afd6d85610
Implement toolchain support for `returned var` and `return var`.
- Modeled `returned` in the parse tree as a `ReturnedSpecifier`
appearing after the `VariableIntroducer`.
- Modeled `return var` in the parse tree as a `ReturnVarSpecifier`
appearing after the `ReturnStatementStart`.
- Factored out the implementation of `return` statement and `returned
var` handling in check into a new `return.{h,cpp}`. The parse nodes
themselves are still handled in `handle_*.cpp`. This allows easy code
reuse between `return` and `returned var`.
37 lines
1.4 KiB
C++
37 lines
1.4 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/tree.h"
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#include "toolchain/sem_ir/inst.h"
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namespace Carbon::Check {
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// Checks a `returned var` binding and returns the location of the return
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// value storage that the name should bind to.
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auto CheckReturnedVar(Context& context, Parse::Node returned_node,
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Parse::Node name_node, SemIR::NameId name_id,
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Parse::Node type_node, SemIR::TypeId type_id)
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-> SemIR::InstId;
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// Registers the given binding as the current `returned var` in this scope.
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auto RegisterReturnedVar(Context& context, SemIR::InstId bind_id) -> void;
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// Checks and builds SemIR for a `return;` statement.
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auto BuildReturnWithNoExpr(Context& context, Parse::Node parse_node) -> void;
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// Checks and builds SemIR for a `return <expression>;` statement.
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auto BuildReturnWithExpr(Context& context, Parse::Node parse_node,
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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::Node parse_node) -> void;
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} // namespace Carbon::Check
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#endif // CARBON_TOOLCHAIN_CHECK_RETURN_H_
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