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69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
//===--- Substitution.h - Swift Generic Substitution ASTs -------*- 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 file defines the Substitution class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_AST_SUBSTITUTION_H
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#define SWIFT_AST_SUBSTITUTION_H
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#include "swift/AST/Type.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/Optional.h"
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namespace llvm {
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class raw_ostream;
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}
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namespace swift {
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class GenericEnvironment;
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class SubstitutionMap;
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/// Substitution - A substitution into a generic specialization.
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class Substitution {
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Type Replacement;
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ArrayRef<ProtocolConformanceRef> Conformance;
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public:
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/// The replacement type.
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Type getReplacement() const { return Replacement; }
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/// The protocol conformances for the replacement. These appear in the same
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/// order as Archetype->getConformsTo() for the substituted archetype.
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const ArrayRef<ProtocolConformanceRef> getConformances() const {
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return Conformance;
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}
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Substitution() {}
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Substitution(Type Replacement, ArrayRef<ProtocolConformanceRef> Conformance);
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/// Checks whether the current substitution is canonical.
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bool isCanonical() const;
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/// Get the canonicalized substitution. If wasCanonical is not nullptr,
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/// store there whether the current substitution was canonical already.
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Substitution getCanonicalSubstitution(bool *wasCanonical = nullptr) const;
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bool operator!=(const Substitution &other) const { return !(*this == other); }
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bool operator==(const Substitution &other) const;
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void print(llvm::raw_ostream &os,
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const PrintOptions &PO = PrintOptions()) const;
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void dump() const;
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void dump(llvm::raw_ostream &os, unsigned indent = 0) const;
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};
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} // end namespace swift
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#endif
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