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38 lines
1.5 KiB
C++
38 lines
1.5 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_EXPLORER_INTERPRETER_PATTERN_MATCH_H_
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#define CARBON_EXPLORER_INTERPRETER_PATTERN_MATCH_H_
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#include <optional>
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#include "explorer/ast/bindings.h"
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#include "explorer/ast/value.h"
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#include "explorer/base/nonnull.h"
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#include "explorer/base/source_location.h"
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namespace Carbon {
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class RuntimeScope;
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class TraceStream;
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class Arena;
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// Attempts to match `v` against the pattern `p`, returning whether matching
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// is successful. If it is, populates **bindings with the variables bound by
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// the match; `bindings` should only be nullopt in contexts where `p`
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// is not permitted to bind variables. **bindings may be modified even if the
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// match is unsuccessful, so it should typically be created for the
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// PatternMatch call and then merged into an existing scope on success.
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// The matches for generic variables in the pattern are output in
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// `generic_args`.
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[[nodiscard]] auto PatternMatch(Nonnull<const Value*> p, ExpressionResult v,
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SourceLocation source_loc,
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std::optional<Nonnull<RuntimeScope*>> bindings,
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BindingMap& generic_args,
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Nonnull<TraceStream*> trace_stream,
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Nonnull<Arena*> arena) -> bool;
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} // namespace Carbon
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#endif // CARBON_EXPLORER_INTERPRETER_PATTERN_MATCH_H_
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