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e5cb871428
Add `AdditiveArithmetic` derived conformances for structs, gated by the
`-enable-experimential-additive-arithmetic-derivation` flag.
Structs whose stored properties all conform to `AdditiveArithmetic` can derive
`AdditiveArithmetic`:
- `static var zero: Self`
- `static func +(lhs: Self, rhs: Self) -> Self`
- `static func -(lhs: Self, rhs: Self) -> Self`
- An "effective memberwise initializer":
- Either a synthesized memberwise initializer or a user-defined initializer
with the same type.
Effective memberwise initializers are used only by derived conformances for
`Self`-returning protocol requirements like `AdditiveArithmetic.+`, which
require memberwise initialization.
Resolves TF-844.
Unblocks TF-845: upstream `Differentiable` derived conformances.
72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
//===--- CodeSynthesis.h - Typechecker code synthesis -----------*- 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 a typechecker-internal interface to a bunch of
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// routines for synthesizing various declarations.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_TYPECHECKING_CODESYNTHESIS_H
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#define SWIFT_TYPECHECKING_CODESYNTHESIS_H
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#include "swift/AST/ForeignErrorConvention.h"
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#include "swift/Basic/ExternalUnion.h"
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#include "swift/Basic/LLVM.h"
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#include "llvm/ADT/Optional.h"
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namespace swift {
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class AbstractFunctionDecl;
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class AbstractStorageDecl;
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class ASTContext;
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class ClassDecl;
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class ConstructorDecl;
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class FuncDecl;
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class GenericParamList;
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class NominalTypeDecl;
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class ObjCReason;
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class ParamDecl;
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class Type;
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class ValueDecl;
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class VarDecl;
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enum class SelfAccessorKind {
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/// We're building a derived accessor on top of whatever this
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/// class provides.
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Peer,
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/// We're building a setter or something around an underlying
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/// implementation, which might be storage or inherited from a
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/// superclass.
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Super,
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};
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Expr *buildSelfReference(VarDecl *selfDecl,
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SelfAccessorKind selfAccessorKind,
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bool isLValue,
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ASTContext &ctx);
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/// Build an expression that evaluates the specified parameter list as a tuple
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/// or paren expr, suitable for use in an apply expr.
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Expr *buildArgumentForwardingExpr(ArrayRef<ParamDecl*> params,
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ASTContext &ctx);
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/// Returns the protocol requirement with the specified name.
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ValueDecl *getProtocolRequirement(ProtocolDecl *protocol, Identifier name);
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// Returns true if given nominal type has a `let` stored with an initial value.
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bool hasLetStoredPropertyWithInitialValue(NominalTypeDecl *nominal);
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} // end namespace swift
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#endif
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