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114 lines
4.0 KiB
C++
114 lines
4.0 KiB
C++
//===--- GenericRequirement.h - Generic requirements ------------*- 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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// This class describes types for working with requirements of generic
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// signatures and the layout of the generic arguments section of
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// generic type metadata.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_IRGEN_GENERICREQUIREMENT_H
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#define SWIFT_IRGEN_GENERICREQUIREMENT_H
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#include "swift/AST/Type.h"
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#include "swift/IRGen/GenericRequirement.h"
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#include "llvm/ADT/DenseMapInfo.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallVector.h"
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namespace llvm {
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class Value;
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}
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namespace swift {
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class CanGenericSignature;
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enum class MetadataState : size_t;
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class ModuleDecl;
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class NominalTypeDecl;
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class ProtocolDecl;
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class SubstitutionMap;
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namespace irgen {
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class Address;
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class IRGenFunction;
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class IRGenModule;
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class DynamicMetadataRequest;
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using RequirementCallback =
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llvm::function_ref<void(GenericRequirement requirement)>;
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/// Enumerate the generic requirements imposed by a generic signature.
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void enumerateGenericSignatureRequirements(CanGenericSignature signature,
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const RequirementCallback &callback);
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/// Given a substitution map and a generic requirement for the
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/// substitution map's input generic signature, emit the required value.
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llvm::Value *
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emitGenericRequirementFromSubstitutions(IRGenFunction &IGF,
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GenericRequirement requirement,
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MetadataState metadataState,
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SubstitutionMap subs,
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bool onHeapPacks=false);
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void emitInitOfGenericRequirementsBuffer(IRGenFunction &IGF,
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ArrayRef<GenericRequirement> reqts,
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Address buffer,
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MetadataState metadataState,
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SubstitutionMap subs,
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bool onHeapPacks=false);
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/// Given a required value, map the requirement into the given
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/// context and bind the value.
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void bindGenericRequirement(IRGenFunction &IGF,
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GenericRequirement requirement,
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llvm::Value *requiredValue,
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MetadataState metadataState,
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SubstitutionMap subs);
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void bindFromGenericRequirementsBuffer(IRGenFunction &IGF,
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ArrayRef<GenericRequirement> reqts,
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Address buffer,
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MetadataState metadataState,
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SubstitutionMap subs);
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/// A class describing the layout of the generic requirements of a
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/// nominal type metadata.
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///
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/// The generic requirements are always laid out as a sequence of shape
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/// parameters, followed by type metadata and witness tables.
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class GenericTypeRequirements {
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llvm::SmallVector<GenericRequirement, 4> Requirements;
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public:
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GenericTypeRequirements(IRGenModule &IGM, NominalTypeDecl *decl);
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GenericTypeRequirements(IRGenModule &IGM, GenericSignature sig);
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/// Return the layout chunks.
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ArrayRef<GenericRequirement> getRequirements() const {
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return Requirements;
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}
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bool empty() const { return Requirements.empty(); }
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void emitInitOfBuffer(IRGenFunction &IGF, SubstitutionMap subs,
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Address buffer);
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void bindFromBuffer(IRGenFunction &IGF, Address buffer, MetadataState state,
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SubstitutionMap subs);
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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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