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Richard Smith
8b59e85b16
For #6830, add support for inline C++ fragments as a declaration rather than as a packaging directive. For now, this uses `inline Cpp <string-literal>;` as syntax. The prior `import Cpp inline <string-literal>;` is left alone for the time being. We can decide separately whether to remove that. `inline Cpp` requires that there was at least one `import Cpp`. It's not clear to me if that's the right design long-term, but it seems reasonable for now. Assisted-by: Gemini via Google Antigravity
57 lines
2.1 KiB
C++
57 lines
2.1 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 "common/check.h"
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#include "toolchain/check/context.h"
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#include "toolchain/check/cpp/generate_ast.h"
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#include "toolchain/check/diagnostic_helpers.h"
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#include "toolchain/check/handle.h"
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#include "toolchain/check/inst.h"
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#include "toolchain/lex/token_kind.h"
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#include "toolchain/parse/node_ids.h"
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#include "toolchain/parse/typed_nodes.h"
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#include "toolchain/sem_ir/typed_insts.h"
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namespace Carbon::Check {
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auto HandleParseNode(Context& /*context*/,
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Parse::InlineIntroducerId /*node_id*/) -> bool {
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return true;
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}
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auto HandleParseNode(Context& context, Parse::InlineCppDeclId node_id) -> bool {
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auto body_id = context.node_stack()
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.PopForSoloNodeId<Parse::NodeKind::InlineImportBody>();
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// If there are no Cpp imports prior to this point, the `Cpp` expression after
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// `import` will have already produced an error.
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//
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// TODO: It'd be nice to produce a clearer error saying to insert an `import
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// Cpp` in a file that uses `inline Cpp` and doesn't otherwise import anything
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// from package `Cpp`.
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if (context.constant_values().Get(
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context.node_stack().Pop<Parse::NodeKind::CppNameExpr>()) ==
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SemIR::ErrorInst::ConstantId) {
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return true;
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}
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CARBON_CHECK(context.cpp_context(), "Have `Cpp` name but no Cpp context");
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auto string_token = context.parse_tree().node_token(body_id);
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auto string_value_id = context.tokens().GetStringLiteralValue(string_token);
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auto string_value = context.string_literal_values().Get(string_value_id);
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if (context.scope_stack().PeekIndex() != ScopeIndex::Package) {
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CARBON_DIAGNOSTIC(InlineDeclNotAtFileScope, Error,
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"`inline Cpp` declaration not at file scope");
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context.emitter().Emit(node_id, InlineDeclNotAtFileScope);
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return true;
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}
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InjectAstFromInlineCode(context, SemIR::LocId(body_id), string_value);
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AddInst<SemIR::InlineCppDecl>(context, node_id, {.text_id = string_value_id});
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return true;
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}
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} // namespace Carbon::Check
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