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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, diagnosing and removing it on:
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// - `extern` 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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