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b0e424f469
Extracted a base CRTP class MetadataVisitor from NominalMetadataVisitor Added new tuple metadata visitors extending the new MetadataVisitor
50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
//===--- MetadataVisitor.h - CRTP for metadata layout -----------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// A CRTP helper class for preparing the common metadata of all metadata
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// objects.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_IRGEN_METADATAVISITOR_H
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#define SWIFT_IRGEN_METADATAVISITOR_H
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namespace swift {
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namespace irgen {
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/// A CRTP class for laying out a type metadata's common fields. Note that this
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/// does *not* handle the metadata template stuff.
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template <class Impl> class MetadataVisitor {
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protected:
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Impl &asImpl() { return *static_cast<Impl*>(this); }
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IRGenModule &IGM;
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MetadataVisitor(IRGenModule &IGM) : IGM(IGM) {}
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public:
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void layout() {
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// Common fields.
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asImpl().addValueWitnessTable();
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asImpl().noteAddressPoint();
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asImpl().addMetadataFlags();
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}
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/// This is the address point.
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void noteAddressPoint() {}
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};
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} // end namespace irgen
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} // end namespace swift
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#endif
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