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Geoff RomerandJon Ross-Perkins
74e1a9949f
Parameter lists need substantially different treatment than tuple patterns in other contexts, so this change splits them into separate parse node kinds. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
35 lines
1.4 KiB
C++
35 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_SUBPATTERN_H_
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#define CARBON_TOOLCHAIN_CHECK_SUBPATTERN_H_
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#include "toolchain/check/context.h"
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#include "toolchain/sem_ir/ids.h"
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namespace Carbon::Check {
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// Marks the start of a region of insts in a pattern context that might
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// represent an expression or a pattern. Typically this is called when
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// handling a parse node that can immediately precede a subpattern (such
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// as `let` or a `,` in a pattern list), and the handler for the subpattern
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// node makes the matching `EndSubpatternAs*` call.
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auto BeginSubpattern(Context& context) -> void;
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// Ends a region started by BeginSubpattern (in stack order), treating it as
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// an expression with the given result, and returns the ID of the region. The
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// region will not yet have any control-flow edges into or out of it.
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auto EndSubpatternAsExpr(Context& context, SemIR::InstId result_id)
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-> SemIR::ExprRegionId;
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// Ends a region started by BeginSubpattern (in stack order), asserting that
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// it had no expression content.
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auto EndSubpatternAsNonExpr(Context& context) -> void;
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// TODO: Add EndSubpatternAsPattern, when needed.
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} // namespace Carbon::Check
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#endif // CARBON_TOOLCHAIN_CHECK_SUBPATTERN_H_
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