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https://github.com/carbon-language/carbon-lang.git
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Burak EmirandDana Jansens
fec6ce2f9f
This implements proposal #2022, with changes from #3763 and leads answers on #6448 Detection of unusedness is happening in ~~`toolchain/check/dataflow_analysis.cpp`~~ next PR. See [here](https://github.com/burakemir/carbon-lang/tree/unused_pattern_bindings_p2022_impl_part2) for preview. ~~All test cases with unused bindings were updated in order to avoid polluting test output.~~ --------- Co-authored-by: Dana Jansens <danakj@orodu.net>
37 lines
1.3 KiB
C++
37 lines
1.3 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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#include "toolchain/parse/context.h"
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#include "toolchain/parse/handle.h"
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namespace Carbon::Parse {
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auto HandlePattern(Context& context) -> void {
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auto state = context.PopState();
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switch (context.PositionKind()) {
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case Lex::TokenKind::OpenParen:
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context.PushStateForPattern(StateKind::PatternListAsTuple,
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state.in_var_pattern,
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state.in_unused_pattern);
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break;
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case Lex::TokenKind::Var:
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context.PushStateForPattern(StateKind::VariablePattern,
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state.in_var_pattern,
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state.in_unused_pattern);
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break;
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case Lex::TokenKind::Unused:
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context.PushStateForPattern(StateKind::UnusedPattern,
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state.in_var_pattern,
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state.in_unused_pattern);
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break;
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default:
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context.PushStateForPattern(StateKind::BindingPattern,
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state.in_var_pattern,
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state.in_unused_pattern);
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break;
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}
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}
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} // namespace Carbon::Parse
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