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https://github.com/carbon-language/carbon-lang.git
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Jon Ross-PerkinsandRichard Smith
7ded56ef35
This implements a few closely related features: - Starts merging namespaces discovered inside imports. - Stores results of cross-package name lookup as an entry inside the scope. - Note this is particularly visible with `i32`. - Moves more of the imported instructions to the import scope. Note this is primarily for executing the namespace TODO in check.cpp, which is removed here. `testdata/namespace/merging_with_indirections.carbon` tests key behavior. --------- Co-authored-by: Richard Smith <richard@metafoo.co.uk>
61 lines
2.8 KiB
C++
61 lines
2.8 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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#ifndef CARBON_TOOLCHAIN_CHECK_IMPORT_H_
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#define CARBON_TOOLCHAIN_CHECK_IMPORT_H_
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#include "toolchain/check/context.h"
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#include "toolchain/parse/node_ids.h"
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#include "toolchain/sem_ir/file.h"
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namespace Carbon::Check {
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// Imports the API file's name lookup information into a corresponding
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// implementation file. Only information for the current package will be copied;
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// information for other packages should be handled through
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// ImportLibrariesFromOtherPackage.
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auto ImportApiFile(Context& context, SemIR::TypeId namespace_type_id,
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const SemIR::File& api_sem_ir) -> void;
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// Add the current package's imports to name lookup. This pulls in all names;
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// conflicts for things such as `package.a.b.c` will be flagged even though they
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// are several layers deep.
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auto ImportLibrariesFromCurrentPackage(
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Context& context, SemIR::TypeId namespace_type_id,
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llvm::ArrayRef<SemIR::ImportIR> import_irs) -> void;
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// Adds another package's imports to name lookup. This only adds the package
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// name to lookup, so that `package.ImportedPackage` will resolve, and will
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// provide a name scope that can be used for further qualified name lookups.
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//
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// import_irs may be empty. has_load_error is used to indicate if any library in
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// the package failed to import correctly.
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auto ImportLibrariesFromOtherPackage(Context& context,
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SemIR::TypeId namespace_type_id,
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SemIR::InstId import_decl_id,
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IdentifierId package_id,
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llvm::ArrayRef<SemIR::ImportIR> import_irs,
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bool has_load_error) -> void;
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// Given a name scope that corresponds to another package (having one or more
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// import_irs), looks for the name in imports. Name resolution results are added
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// to the scope, and the InstId (possibly invalid) is returned.
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//
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// In general, this will add an ImportRef and load it; it's never left unloaded
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// because the result is expected to be immediately used. Namespaces will be
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// directly produced, similar to how they function for imports from the current
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// package. Conflicts will be resolved and diagnosed.
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//
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// Arguments are all in the context of the current IR. Scope lookup is expected
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// to be resolved first.
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auto ImportNameFromOtherPackage(
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Context& context, SemIRLoc loc, SemIR::NameScopeId scope_id,
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llvm::ArrayRef<std::pair<SemIR::ImportIRId, SemIR::NameScopeId>>
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import_ir_scopes,
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SemIR::NameId name_id) -> SemIR::InstId;
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} // namespace Carbon::Check
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#endif // CARBON_TOOLCHAIN_CHECK_IMPORT_H_
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