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https://github.com/carbon-language/carbon-lang.git
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Elliott Kalt
58de34e534
Decouples associated constants from being special cased in let handlers. Enforces associated constant grammar restrictions in parsing instead of checking. Closes #5411
84 lines
3.2 KiB
C++
84 lines
3.2 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 processing after params, deciding whether it's a declaration or
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// definition.
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static auto HandleDeclOrDefinition(Context& context, NodeKind decl_kind,
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NodeKind definition_start_kind,
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StateKind definition_finish_state) -> void {
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auto state = context.PopState();
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if (state.has_error || !context.PositionIs(Lex::TokenKind::OpenCurlyBrace)) {
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context.AddNodeExpectingDeclSemi(state, decl_kind,
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context.tokens().GetKind(state.token),
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/*is_def_allowed=*/true);
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return;
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}
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context.PushState(state, definition_finish_state);
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if (decl_kind == NodeKind::ClassDecl) {
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context.PushState(StateKind::DeclScopeLoopAsClass);
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} else if (decl_kind == NodeKind::InterfaceDecl) {
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context.PushState(StateKind::DeclScopeLoopAsInterface);
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} else {
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context.PushState(StateKind::DeclScopeLoopAsRegular);
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}
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context.AddNode(definition_start_kind, context.Consume(), state.has_error);
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}
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auto HandleDeclOrDefinitionAsClass(Context& context) -> void {
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HandleDeclOrDefinition(context, NodeKind::ClassDecl,
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NodeKind::ClassDefinitionStart,
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StateKind::DeclDefinitionFinishAsClass);
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}
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auto HandleDeclOrDefinitionAsImpl(Context& context) -> void {
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HandleDeclOrDefinition(context, NodeKind::ImplDecl,
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NodeKind::ImplDefinitionStart,
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StateKind::DeclDefinitionFinishAsImpl);
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}
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auto HandleDeclOrDefinitionAsInterface(Context& context) -> void {
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HandleDeclOrDefinition(context, NodeKind::InterfaceDecl,
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NodeKind::InterfaceDefinitionStart,
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StateKind::DeclDefinitionFinishAsInterface);
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}
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auto HandleDeclOrDefinitionAsNamedConstraint(Context& context) -> void {
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HandleDeclOrDefinition(context, NodeKind::NamedConstraintDecl,
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NodeKind::NamedConstraintDefinitionStart,
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StateKind::DeclDefinitionFinishAsNamedConstraint);
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}
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// Handles parsing after the declaration scope of a type.
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static auto HandleDeclDefinitionFinish(Context& context,
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NodeKind definition_kind) -> void {
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auto state = context.PopState();
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context.AddNode(definition_kind, context.Consume(), state.has_error);
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}
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auto HandleDeclDefinitionFinishAsClass(Context& context) -> void {
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HandleDeclDefinitionFinish(context, NodeKind::ClassDefinition);
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}
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auto HandleDeclDefinitionFinishAsImpl(Context& context) -> void {
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HandleDeclDefinitionFinish(context, NodeKind::ImplDefinition);
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}
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auto HandleDeclDefinitionFinishAsInterface(Context& context) -> void {
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HandleDeclDefinitionFinish(context, NodeKind::InterfaceDefinition);
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}
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auto HandleDeclDefinitionFinishAsNamedConstraint(Context& context) -> void {
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HandleDeclDefinitionFinish(context, NodeKind::NamedConstraintDefinition);
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}
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} // namespace Carbon::Parse
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