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Jon Ross-Perkins
6cc5d7ed2a
This is a bit of an experiment to see if there's a reasonable way to write a shared enum type, rather than writing per-case wrappers for things like `HasTypeQualifiers` or the printing. I think it's a bit borderline complexity right now, but I'm not sure I can reduce it much further. This changes from things like `Internal::EnumClassName##RawEnum` to `Internal::EnumClassName##Data::RawEnum` so that the enum entries can have back references to bit shifts without needing to know the containing type name. Because I'm trying to reduce duplication between mask and non-mask enums, I did this to non-mask enums too. This was motivated by #6035 adding another enum mask (which will grow more entries, and is intended to switch if this is accepted), but I'm not using that PR as a base here because I didn't want the merge dependency.
57 lines
1.9 KiB
C++
57 lines
1.9 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_PARSE_NODE_CATEGORY_H_
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#define CARBON_TOOLCHAIN_PARSE_NODE_CATEGORY_H_
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#include "common/enum_mask_base.h"
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#include "common/ostream.h"
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namespace Carbon::Parse {
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// An X-macro for node categories. Uses should look like:
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//
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// #define CARBON_NODE_CATEGORY_FOR_XYZ(Name) ...
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// CARBON_NODE_CATEGORY(CARBON_NODE_CATEGORY_FOR_XYZ)
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// #undef CARBON_NODE_CATEGORY_FOR_XYZ
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#define CARBON_NODE_CATEGORY(X) \
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X(Decl) \
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X(Expr) \
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X(ImplAs) \
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X(IntConst) \
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X(MemberExpr) \
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X(MemberName) \
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X(Modifier) \
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X(NonExprName) \
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X(PackageName) \
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X(Pattern) \
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X(Requirement) \
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X(Statement)
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// We expect this to grow, so are using a bigger size than needed.
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CARBON_DEFINE_RAW_ENUM_MASK(NodeCategory, uint32_t) {
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CARBON_NODE_CATEGORY(CARBON_RAW_ENUM_MASK_ENUMERATOR)
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};
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// Represents a set of keyword modifiers, using a separate bit per modifier.
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class NodeCategory : public CARBON_ENUM_MASK_BASE(NodeCategory) {
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public:
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CARBON_NODE_CATEGORY(CARBON_ENUM_MASK_CONSTANT_DECL)
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using EnumMaskBase::EnumMaskBase;
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// Provide implicit conversion because the raw enum is used in templates.
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explicit(false) constexpr NodeCategory(RawEnumType value) {
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*this = EnumBase::Make(value);
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}
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};
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#define CARBON_NODE_CATEGORY_WITH_TYPE(X) \
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CARBON_ENUM_MASK_CONSTANT_DEFINITION(NodeCategory, X)
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CARBON_NODE_CATEGORY(CARBON_NODE_CATEGORY_WITH_TYPE)
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#undef CARBON_NODE_CATEGORY_WITH_TYPE
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} // namespace Carbon::Parse
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#endif // CARBON_TOOLCHAIN_PARSE_NODE_CATEGORY_H_
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