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https://github.com/carbon-language/carbon-lang.git
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Jon Ross-Perkins
1c673041f0
This replaces all invalid node IDs in import_ref.cpp with references to the imported instruction. This splits out ReplaceInstBeforeConstantUse into a separate function when the LocationId is replaced, as for splicing. That's the less common case, whereas others would need to provide the LocationId in order just to not change the value.
57 lines
2.3 KiB
C++
57 lines
2.3 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/check/context.h"
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#include "toolchain/check/decl_state.h"
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#include "toolchain/check/modifiers.h"
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#include "toolchain/sem_ir/ids.h"
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namespace Carbon::Check {
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auto HandleNamespaceStart(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_state_stack().Push(DeclState::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 HandleNamespace(Context& context, Parse::NamespaceId node_id) -> bool {
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auto name_context = context.decl_name_stack().FinishName();
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LimitModifiersOnDecl(context, KeywordModifierSet::None,
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Lex::TokenKind::Namespace);
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auto namespace_inst = SemIR::Namespace{
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context.GetBuiltinType(SemIR::BuiltinKind::NamespaceType),
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SemIR::NameScopeId::Invalid, SemIR::InstId::Invalid};
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auto namespace_id = context.AddPlaceholderInst({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.enclosing_scope_id_for_new_inst());
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context.ReplaceInstBeforeConstantUse(namespace_id, namespace_inst);
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auto existing_inst_id =
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context.decl_name_stack().LookupOrAddName(name_context, namespace_id);
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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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// 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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if (existing->import_id.is_valid() &&
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!context.insts().GetLocationId(existing_inst_id).is_valid()) {
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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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context.decl_state_stack().Pop(DeclState::Namespace);
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return true;
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}
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} // namespace Carbon::Check
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