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Add namespace-scoped private keyword support. (#4026)

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Adds access to the name lookup table in name scopes. This is so that we
can quickly check access during name lookup without resolving the entity
itself. Does this for names in general, but does not implement handling
for entity-scoped names, only namespace-scoped names (where they're
essentially just not exported).

Excludes `private` names from exports. Although names should be
accessible to `impl` files, that's not implemented here because we'll
probably want to do it by directly copying name lookup tables.
This commit is contained in:
Jon Ross-Perkins
2024-06-06 00:19:56 +00:00
committed by GitHub
parent d1862e829b
commit 807a3f1370
33 changed files with 2022 additions and 335 deletions
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toolchain/check/decl_name_stack.cpp
+14 -8
View File
@@ -11,6 +11,7 @@
#include "toolchain/check/name_component.h"
#include "toolchain/diagnostics/diagnostic.h"
#include "toolchain/sem_ir/ids.h"
#include "toolchain/sem_ir/name_scope.h"
namespace Carbon::Check {
@@ -114,8 +115,8 @@ auto DeclNameStack::Restore(SuspendedName sus) -> void {
}
}
auto DeclNameStack::AddName(NameContext name_context, SemIR::InstId target_id)
-> void {
auto DeclNameStack::AddName(NameContext name_context, SemIR::InstId target_id,
SemIR::AccessKind access_kind) -> void {
switch (name_context.state) {
case NameContext::State::Error:
return;
@@ -141,12 +142,14 @@ auto DeclNameStack::AddName(NameContext name_context, SemIR::InstId target_id)
// Exports are only tracked when the declaration is at the file-level
// scope. Otherwise, it's in some other entity, such as a class.
if (name_context.initial_scope_index == ScopeIndex::Package) {
if (access_kind == SemIR::AccessKind::Public &&
name_context.initial_scope_index == ScopeIndex::Package) {
context_->AddExport(target_id);
}
auto [_, success] = name_scope.names.insert(
{name_context.unresolved_name_id, target_id});
{name_context.unresolved_name_id,
{.inst_id = target_id, .access_kind = access_kind}});
CARBON_CHECK(success)
<< "Duplicate names should have been resolved previously: "
<< name_context.unresolved_name_id << " in "
@@ -161,21 +164,24 @@ auto DeclNameStack::AddName(NameContext name_context, SemIR::InstId target_id)
}
auto DeclNameStack::AddNameOrDiagnoseDuplicate(NameContext name_context,
SemIR::InstId target_id)
SemIR::InstId target_id,
SemIR::AccessKind access_kind)
-> void {
if (auto id = name_context.prev_inst_id(); id.is_valid()) {
context_->DiagnoseDuplicateName(target_id, id);
} else {
AddName(name_context, target_id);
AddName(name_context, target_id, access_kind);
}
}
auto DeclNameStack::LookupOrAddName(NameContext name_context,
SemIR::InstId target_id) -> SemIR::InstId {
SemIR::InstId target_id,
SemIR::AccessKind access_kind)
-> SemIR::InstId {
if (auto id = name_context.prev_inst_id(); id.is_valid()) {
return id;
}
AddName(name_context, target_id);
AddName(name_context, target_id, access_kind);
return SemIR::InstId::Invalid;
}