mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Jon Ross-Perkins
40b2217421
This adds a `BindExport` instruction in order to better track the location of the `export` itself, but a `bind_name_id` is also added to `ImportRef` so that we know quickly where to put it in name lookup. Merging identical names is a TODO. I haven't quite decided how best to achieve that, because I do think the BindExport should be what's actually added to name lookup. Also, I will probably add a mode to DeclNameStack that blocks non-namespace scopes. This seems to already be an error, but the wrong one (maybe due to lack of support for cross-file decl/def support).
59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|
|
#include "toolchain/check/context.h"
|
|
#include "toolchain/check/decl_name_stack.h"
|
|
#include "toolchain/parse/typed_nodes.h"
|
|
#include "toolchain/sem_ir/ids.h"
|
|
#include "toolchain/sem_ir/typed_insts.h"
|
|
|
|
namespace Carbon::Check {
|
|
|
|
auto HandleExportIntroducer(Context& context,
|
|
Parse::ExportIntroducerId /*node_id*/) -> bool {
|
|
// TODO: Probably need to update DeclNameStack to restrict to only namespaces.
|
|
context.decl_name_stack().PushScopeAndStartName();
|
|
return true;
|
|
}
|
|
|
|
auto HandleExportDirective(Context& context, Parse::ExportDirectiveId node_id)
|
|
-> bool {
|
|
auto name_context = context.decl_name_stack().FinishName();
|
|
context.decl_name_stack().PopScope();
|
|
|
|
if (name_context.state == DeclNameStack::NameContext::State::Error) {
|
|
// Should already be diagnosed.
|
|
return true;
|
|
}
|
|
|
|
auto inst_id = name_context.prev_inst_id();
|
|
if (!inst_id.is_valid()) {
|
|
context.DiagnoseNameNotFound(node_id, name_context.name_id_for_new_inst());
|
|
return true;
|
|
}
|
|
|
|
auto import_ref = context.insts().TryGetAs<SemIR::ImportRefLoaded>(inst_id);
|
|
if (!import_ref) {
|
|
CARBON_DIAGNOSTIC(ExportNotImportedEntity, Error,
|
|
"Only imported entities are valid for `export`.");
|
|
CARBON_DIAGNOSTIC(ExportNotImportedEntitySource, Note,
|
|
"Name is declared here.");
|
|
context.emitter()
|
|
.Build(node_id, ExportNotImportedEntity)
|
|
.Note(inst_id, ExportNotImportedEntitySource)
|
|
.Emit();
|
|
return true;
|
|
}
|
|
|
|
auto export_id = context.AddInst(
|
|
{node_id, SemIR::BindExport{.type_id = import_ref->type_id,
|
|
.bind_name_id = import_ref->bind_name_id,
|
|
.value_id = inst_id}});
|
|
context.AddExport(export_id);
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace Carbon::Check
|