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https://github.com/carbon-language/carbon-lang.git
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Jon Ross-Perkins
99696b9812
This is for consistency with #4120. Similar to that, we can use overloads on the typed NodeId rather than individually named handlers. There isn't the same caller benefit here though, since the calls from check.cpp are already boilerplate.
73 lines
3.0 KiB
C++
73 lines
3.0 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/check/context.h"
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#include "toolchain/check/decl_introducer_state.h"
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#include "toolchain/check/handle.h"
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#include "toolchain/check/modifiers.h"
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#include "toolchain/check/name_component.h"
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#include "toolchain/sem_ir/ids.h"
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#include "toolchain/sem_ir/inst.h"
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#include "toolchain/sem_ir/name_scope.h"
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namespace Carbon::Check {
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auto HandleParseNode(Context& context, Parse::NamespaceStartId /*node_id*/)
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-> bool {
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// Optional modifiers and the name follow.
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context.decl_introducer_state_stack().Push<Lex::TokenKind::Namespace>();
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context.decl_name_stack().PushScopeAndStartName();
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return true;
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}
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auto HandleParseNode(Context& context, Parse::NamespaceId node_id) -> bool {
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auto name_context = context.decl_name_stack().FinishName(
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PopNameComponentWithoutParams(context, Lex::TokenKind::Namespace));
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auto introducer =
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context.decl_introducer_state_stack().Pop<Lex::TokenKind::Namespace>();
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LimitModifiersOnDecl(context, introducer, KeywordModifierSet::None);
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auto namespace_inst = SemIR::Namespace{
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context.GetBuiltinType(SemIR::BuiltinInstKind::NamespaceType),
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SemIR::NameScopeId::Invalid, SemIR::InstId::Invalid};
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auto namespace_id =
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context.AddPlaceholderInst(SemIR::LocIdAndInst(node_id, namespace_inst));
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namespace_inst.name_scope_id = context.name_scopes().Add(
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namespace_id, name_context.name_id_for_new_inst(),
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name_context.parent_scope_id_for_new_inst());
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context.ReplaceInstBeforeConstantUse(namespace_id, namespace_inst);
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auto existing_inst_id = context.decl_name_stack().LookupOrAddName(
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name_context, namespace_id, SemIR::AccessKind::Public);
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if (existing_inst_id.is_valid()) {
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// If there's a name conflict with a namespace, "merge" by using the
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// previous declaration. Otherwise, diagnose the issue.
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if (auto existing =
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context.insts().TryGetAs<SemIR::Namespace>(existing_inst_id)) {
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if (context.name_scopes().Get(existing->name_scope_id).is_closed_import) {
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// The existing name is a package name, so this is a name conflict.
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context.DiagnoseDuplicateName(namespace_id, existing_inst_id);
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// Treat this as a local namespace name from now on to avoid further
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// diagnostics.
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context.name_scopes().Get(existing->name_scope_id).is_closed_import =
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false;
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} else if (existing->import_id.is_valid() &&
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!context.insts().GetLocId(existing_inst_id).is_valid()) {
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// When the name conflict is an imported namespace, fill the location ID
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// so that future diagnostics point at this declaration.
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context.SetNamespaceNodeId(existing_inst_id, node_id);
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}
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} else {
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context.DiagnoseDuplicateName(namespace_id, existing_inst_id);
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}
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}
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context.decl_name_stack().PopScope();
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return true;
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}
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} // namespace Carbon::Check
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