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https://github.com/carbon-language/carbon-lang.git
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Jon Ross-Perkins
2d3842fc06
Support for types (particularly classes) is left as a TODO. There's also an issue I'm observing with a "define in impl" test, but this is probably an issue with resolving the prior declaration which is imported indirectly. The PR was already feeling big, so I'm choosing to cut here. Note, this does not implement the rule "The owning library's API file must import the `extern` declaration, and must also contain a declaration."
72 lines
3.1 KiB
C++
72 lines
3.1 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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#ifndef CARBON_TOOLCHAIN_CHECK_MODIFIERS_H_
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#define CARBON_TOOLCHAIN_CHECK_MODIFIERS_H_
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#include "toolchain/check/context.h"
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namespace Carbon::Check {
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// Reports a diagnostic if access control modifiers on this are not allowed for
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// a declaration in `parent_scope_inst`, and updates `introducer`.
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//
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// `parent_scope_inst` may be nullopt for a declaration in a block scope.
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auto CheckAccessModifiersOnDecl(Context& context,
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DeclIntroducerState& introducer,
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std::optional<SemIR::Inst> parent_scope_inst)
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-> void;
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// Reports a diagnostic if the method function modifiers `abstract`, `virtual`,
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// or `impl` are present but not permitted on a function declaration in
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// `parent_scope_inst`.
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//
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// `parent_scope_inst` may be nullopt for a declaration in a block scope.
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auto CheckMethodModifiersOnFunction(
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Context& context, DeclIntroducerState& introducer,
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SemIR::InstId parent_scope_inst_id,
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std::optional<SemIR::Inst> parent_scope_inst) -> void;
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// Like `LimitModifiersOnDecl`, except says which modifiers are forbidden, and a
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// `context_string` (and optional `context_loc_id`) specifying the context in
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// which those modifiers are forbidden.
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// TODO: Take another look at diagnostic phrasing for callers.
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auto ForbidModifiersOnDecl(Context& context, DeclIntroducerState& introducer,
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KeywordModifierSet forbidden,
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llvm::StringRef context_string,
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SemIR::LocId context_loc_id = SemIR::LocId::Invalid)
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-> void;
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// Reports a diagnostic (using `decl_kind`) if modifiers on this declaration are
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// not in `allowed`. Updates `introducer`.
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inline auto LimitModifiersOnDecl(Context& context,
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DeclIntroducerState& introducer,
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KeywordModifierSet allowed) -> void {
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ForbidModifiersOnDecl(context, introducer, ~allowed, "");
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}
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// Restricts the `extern` modifier to only be used on namespace-scoped
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// declarations. Diagnoses and cleans up:
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// - `extern library` on a definition.
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// - `extern` on a scoped entity.
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//
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// `parent_scope_inst` may be nullopt for a declaration in a block scope.
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auto RestrictExternModifierOnDecl(Context& context,
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DeclIntroducerState& introducer,
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std::optional<SemIR::Inst> parent_scope_inst,
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bool is_definition) -> void;
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// Report a diagonostic if `default` and `final` modifiers are used on
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// declarations where they are not allowed. Right now they are only allowed
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// inside interfaces.
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//
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// `parent_scope_inst` may be nullopt for a declaration in a block scope.
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auto RequireDefaultFinalOnlyInInterfaces(
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Context& context, DeclIntroducerState& introducer,
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std::optional<SemIR::Inst> parent_scope_inst) -> void;
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} // namespace Carbon::Check
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#endif // CARBON_TOOLCHAIN_CHECK_MODIFIERS_H_
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