mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Geoff Romer
8c113c1241
Also renames variables of that type to match. A follow-up PR will rename `Parse::StateStackEntry` to `Parse::State`. This is more consistent with the naming of similar enums elsewhere in the toolchain, and with the prevailing practice of using `state` rather than e.g. `entry` as the name of a `StateStackEntry`. See also discussion [here](https://discord.com/channels/655572317891461132/963846118964350976/1326280585592700990)
129 lines
5.0 KiB
C++
129 lines
5.0 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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// Handles PatternListElementAs(Tuple|Explicit|Implicit).
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static auto HandlePatternListElement(Context& context, StateKind pattern_state,
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StateKind finish_state_kind) -> void {
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auto state = context.PopState();
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context.PushStateForPattern(finish_state_kind, state.in_var_pattern);
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context.PushStateForPattern(pattern_state, state.in_var_pattern);
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}
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auto HandlePatternListElementAsTuple(Context& context) -> void {
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HandlePatternListElement(context, StateKind::Pattern,
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StateKind::PatternListElementFinishAsTuple);
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}
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auto HandlePatternListElementAsExplicit(Context& context) -> void {
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HandlePatternListElement(context, StateKind::Pattern,
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StateKind::PatternListElementFinishAsExplicit);
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}
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auto HandlePatternListElementAsImplicit(Context& context) -> void {
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HandlePatternListElement(context, StateKind::Pattern,
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StateKind::PatternListElementFinishAsImplicit);
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}
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// Handles PatternListElementFinishAs(Tuple|Explicit|Implicit).
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static auto HandlePatternListElementFinish(Context& context,
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Lex::TokenKind close_token,
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StateKind param_state_kind) -> void {
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auto state = context.PopState();
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if (state.has_error) {
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context.ReturnErrorOnState();
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}
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if (context.ConsumeListToken(NodeKind::PatternListComma, close_token,
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state.has_error) ==
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Context::ListTokenKind::Comma) {
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context.PushStateForPattern(param_state_kind, state.in_var_pattern);
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}
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}
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auto HandlePatternListElementFinishAsTuple(Context& context) -> void {
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HandlePatternListElementFinish(context, Lex::TokenKind::CloseParen,
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StateKind::PatternListElementAsTuple);
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}
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auto HandlePatternListElementFinishAsExplicit(Context& context) -> void {
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HandlePatternListElementFinish(context, Lex::TokenKind::CloseParen,
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StateKind::PatternListElementAsExplicit);
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}
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auto HandlePatternListElementFinishAsImplicit(Context& context) -> void {
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HandlePatternListElementFinish(context, Lex::TokenKind::CloseSquareBracket,
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StateKind::PatternListElementAsImplicit);
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}
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// Handles PatternListAs(Tuple|Explicit|Implicit).
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static auto HandlePatternList(Context& context, NodeKind node_kind,
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Lex::TokenKind open_token_kind,
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Lex::TokenKind close_token_kind,
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StateKind param_state, StateKind finish_state)
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-> void {
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auto state = context.PopState();
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context.PushStateForPattern(finish_state, state.in_var_pattern);
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context.AddLeafNode(node_kind, context.ConsumeChecked(open_token_kind));
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if (!context.PositionIs(close_token_kind)) {
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context.PushStateForPattern(param_state, state.in_var_pattern);
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}
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}
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auto HandlePatternListAsTuple(Context& context) -> void {
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HandlePatternList(context, NodeKind::TuplePatternStart,
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Lex::TokenKind::OpenParen, Lex::TokenKind::CloseParen,
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StateKind::PatternListElementAsTuple,
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StateKind::PatternListFinishAsTuple);
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}
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auto HandlePatternListAsExplicit(Context& context) -> void {
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HandlePatternList(context, NodeKind::ExplicitParamListStart,
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Lex::TokenKind::OpenParen, Lex::TokenKind::CloseParen,
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StateKind::PatternListElementAsExplicit,
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StateKind::PatternListFinishAsExplicit);
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}
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auto HandlePatternListAsImplicit(Context& context) -> void {
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HandlePatternList(context, NodeKind::ImplicitParamListStart,
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Lex::TokenKind::OpenSquareBracket,
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Lex::TokenKind::CloseSquareBracket,
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StateKind::PatternListElementAsImplicit,
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StateKind::PatternListFinishAsImplicit);
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}
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// Handles PatternListFinishAs(Tuple|Explicit|Implicit).
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static auto HandlePatternListFinish(Context& context, NodeKind node_kind,
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Lex::TokenKind token_kind) -> void {
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auto state = context.PopState();
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context.AddNode(node_kind, context.ConsumeChecked(token_kind),
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state.has_error);
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}
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auto HandlePatternListFinishAsTuple(Context& context) -> void {
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HandlePatternListFinish(context, NodeKind::TuplePattern,
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Lex::TokenKind::CloseParen);
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}
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auto HandlePatternListFinishAsExplicit(Context& context) -> void {
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HandlePatternListFinish(context, NodeKind::ExplicitParamList,
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Lex::TokenKind::CloseParen);
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}
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auto HandlePatternListFinishAsImplicit(Context& context) -> void {
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HandlePatternListFinish(context, NodeKind::ImplicitParamList,
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Lex::TokenKind::CloseSquareBracket);
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}
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} // namespace Carbon::Parse
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