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SwiftDeclSynthesizer.cpp
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//===--- DeclSynthesizer.cpp - Synthesize helper Swift decls --------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2022 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "SwiftDeclSynthesizer.h"
#include "swift/AST/ASTMangler.h"
#include "swift/AST/Builtins.h"
#include "swift/AST/Expr.h"
#include "swift/AST/ParameterList.h"
#include "swift/AST/Pattern.h"
#include "swift/AST/Stmt.h"
#include "swift/Basic/Assertions.h"
#include "swift/ClangImporter/CXXMethodBridging.h"
#include "clang/AST/Mangle.h"
#include "clang/Sema/DelayedDiagnostic.h"
using namespace swift;
using namespace importer;
static Argument createSelfArg(AccessorDecl *accessorDecl) {
ASTContext &ctx = accessorDecl->getASTContext();
auto selfDecl = accessorDecl->getImplicitSelfDecl();
auto selfRefExpr = new (ctx) DeclRefExpr(selfDecl, DeclNameLoc(),
/*implicit*/ true);
if (!accessorDecl->isMutating()) {
selfRefExpr->setType(selfDecl->getInterfaceType());
return Argument::unlabeled(selfRefExpr);
}
selfRefExpr->setType(LValueType::get(selfDecl->getInterfaceType()));
return Argument::implicitInOut(ctx, selfRefExpr);
}
static CallExpr *createAccessorImplCallExpr(FuncDecl *accessorImpl,
Argument selfArg,
DeclRefExpr *keyRefExpr = nullptr) {
ASTContext &ctx = accessorImpl->getASTContext();
auto accessorImplExpr =
new (ctx) DeclRefExpr(ConcreteDeclRef(accessorImpl), DeclNameLoc(),
/*Implicit*/ true);
accessorImplExpr->setType(accessorImpl->getInterfaceType());
auto accessorImplDotCallExpr =
DotSyntaxCallExpr::create(ctx, accessorImplExpr, SourceLoc(), selfArg);
accessorImplDotCallExpr->setType(accessorImpl->getMethodInterfaceType());
accessorImplDotCallExpr->setThrows(nullptr);
ArgumentList *argList;
if (keyRefExpr) {
argList = ArgumentList::forImplicitUnlabeled(ctx, {keyRefExpr});
} else {
argList = ArgumentList::forImplicitUnlabeled(ctx, {});
}
auto *accessorImplCallExpr =
CallExpr::createImplicit(ctx, accessorImplDotCallExpr, argList);
accessorImplCallExpr->setType(accessorImpl->getResultInterfaceType());
accessorImplCallExpr->setThrows(nullptr);
return accessorImplCallExpr;
}
static DeclRefExpr *createParamRefExpr(AccessorDecl *accessorDecl,
unsigned index) {
ASTContext &ctx = accessorDecl->getASTContext();
auto paramDecl = accessorDecl->getParameters()->get(index);
auto paramRefExpr = new (ctx) DeclRefExpr(paramDecl, DeclNameLoc(),
/*Implicit*/ true);
paramRefExpr->setType(paramDecl->getTypeInContext());
return paramRefExpr;
}
static AccessorDecl *makeFieldGetterDecl(ClangImporter::Implementation &Impl,
NominalTypeDecl *importedDecl,
VarDecl *importedFieldDecl,
ClangNode clangNode = ClangNode()) {
auto &C = Impl.SwiftContext;
auto *params = ParameterList::createEmpty(C);
auto getterType = importedFieldDecl->getInterfaceType();
auto getterDecl = AccessorDecl::create(
C,
/*declLoc=*/importedFieldDecl->getLoc(),
/*AccessorKeywordLoc=*/SourceLoc(), AccessorKind::Get, importedFieldDecl,
/*Async=*/false, /*AsyncLoc=*/SourceLoc(),
/*Throws=*/false,
/*ThrowsLoc=*/SourceLoc(), /*ThrownType=*/TypeLoc(),
params, getterType, importedDecl, clangNode);
getterDecl->setAccess(importedFieldDecl->getFormalAccess());
getterDecl->setIsObjC(false);
getterDecl->setIsDynamic(false);
return getterDecl;
}
static AccessorDecl *makeFieldSetterDecl(ClangImporter::Implementation &Impl,
NominalTypeDecl *importedDecl,
VarDecl *importedFieldDecl,
ClangNode clangNode = ClangNode()) {
auto &C = Impl.SwiftContext;
auto newValueDecl = new (C) ParamDecl(SourceLoc(), SourceLoc(), Identifier(),
SourceLoc(), C.Id_value, importedDecl);
newValueDecl->setSpecifier(ParamSpecifier::Default);
newValueDecl->setInterfaceType(importedFieldDecl->getInterfaceType());
auto *params = ParameterList::createWithoutLoc(newValueDecl);
auto voidTy = TupleType::getEmpty(C);
auto setterDecl = AccessorDecl::create(
C,
/*declLoc=*/SourceLoc(),
/*AccessorKeywordLoc=*/SourceLoc(), AccessorKind::Set, importedFieldDecl,
/*Async=*/false, /*AsyncLoc=*/SourceLoc(),
/*Throws=*/false,
/*ThrowsLoc=*/SourceLoc(), /*ThrownType=*/TypeLoc(),
params, voidTy, importedDecl, clangNode);
setterDecl->setIsObjC(false);
setterDecl->setIsDynamic(false);
setterDecl->setSelfAccessKind(SelfAccessKind::Mutating);
setterDecl->setAccess(importedFieldDecl->getFormalAccess());
return setterDecl;
}
std::pair<VarDecl *, PatternBindingDecl *>
SwiftDeclSynthesizer::createVarWithPattern(DeclContext *dc, Identifier name,
Type ty,
VarDecl::Introducer introducer,
bool isImplicit, AccessLevel access,
AccessLevel setterAccess) {
ASTContext &ctx = dc->getASTContext();
// Create a variable to store the underlying value.
auto var = new (ctx) VarDecl(
/*IsStatic*/ false, introducer, SourceLoc(), name, dc);
if (isImplicit)
var->setImplicit();
var->setInterfaceType(ty);
var->setAccess(access);
var->setSetterAccess(setterAccess);
// Create a pattern binding to describe the variable.
Pattern *varPattern = createTypedNamedPattern(var);
auto *patternBinding = PatternBindingDecl::create(
ctx, /*StaticLoc*/ SourceLoc(), StaticSpellingKind::None,
/*VarLoc*/ SourceLoc(), varPattern, /*EqualLoc*/ SourceLoc(),
/*InitExpr*/ nullptr, dc);
if (isImplicit)
patternBinding->setImplicit();
return {var, patternBinding};
}
Pattern *SwiftDeclSynthesizer::createTypedNamedPattern(VarDecl *decl) {
ASTContext &Ctx = decl->getASTContext();
Type ty = decl->getTypeInContext();
Pattern *P = new (Ctx) NamedPattern(decl);
P->setType(ty);
P->setImplicit();
return TypedPattern::createImplicit(Ctx, P, ty);
}
namespace {
using ConstantGetterBodyContextData =
llvm::PointerIntPair<Expr *, 2, ConstantConvertKind>;
}
Type SwiftDeclSynthesizer::getConstantLiteralType(
Type type, ConstantConvertKind convertKind) {
switch (convertKind) {
case ConstantConvertKind::Construction:
case ConstantConvertKind::ConstructionWithUnwrap: {
auto found = ImporterImpl.RawTypes.find(type->getAnyNominal());
assert(found != ImporterImpl.RawTypes.end());
return found->second;
}
default:
return type;
}
}
ValueDecl *SwiftDeclSynthesizer::createConstant(
Identifier name, DeclContext *dc, Type type, const clang::APValue &value,
ConstantConvertKind convertKind, bool isStatic, ClangNode ClangN) {
auto &context = ImporterImpl.SwiftContext;
// Create the integer literal value.
Expr *expr = nullptr;
switch (value.getKind()) {
case clang::APValue::AddrLabelDiff:
case clang::APValue::Array:
case clang::APValue::ComplexFloat:
case clang::APValue::ComplexInt:
case clang::APValue::FixedPoint:
case clang::APValue::Indeterminate:
case clang::APValue::LValue:
case clang::APValue::MemberPointer:
case clang::APValue::None:
case clang::APValue::Struct:
case clang::APValue::Union:
case clang::APValue::Vector:
llvm_unreachable("Unhandled APValue kind");
case clang::APValue::Float:
case clang::APValue::Int: {
// Print the value.
llvm::SmallString<16> printedValueBuf;
if (value.getKind() == clang::APValue::Int) {
value.getInt().toString(printedValueBuf);
} else {
assert(value.getFloat().isFinite() && "can't handle infinities or NaNs");
value.getFloat().toString(printedValueBuf);
}
StringRef printedValue = printedValueBuf.str();
// If this was a negative number, record that and strip off the '-'.
bool isNegative = printedValue.front() == '-';
if (isNegative)
printedValue = printedValue.drop_front();
auto literalType = getConstantLiteralType(type, convertKind);
// Create the expression node.
StringRef printedValueCopy(context.AllocateCopy(printedValue));
if (value.getKind() == clang::APValue::Int) {
bool isBool = type->getCanonicalType()->isBool();
// Check if "type" is a C++ enum with an underlying type of "bool".
if (!isBool && type->getStructOrBoundGenericStruct() &&
type->getStructOrBoundGenericStruct()->getClangDecl()) {
if (auto enumDecl = dyn_cast<clang::EnumDecl>(
type->getStructOrBoundGenericStruct()->getClangDecl())) {
isBool = enumDecl->getIntegerType()->isBooleanType();
}
}
if (isBool) {
auto *boolExpr = new (context)
BooleanLiteralExpr(value.getInt().getBoolValue(), SourceLoc(),
/*Implicit=*/true);
boolExpr->setBuiltinInitializer(context.getBoolBuiltinInitDecl());
boolExpr->setType(literalType);
expr = boolExpr;
} else {
auto *intExpr =
new (context) IntegerLiteralExpr(printedValueCopy, SourceLoc(),
/*Implicit=*/true);
auto *intDecl = literalType->getAnyNominal();
intExpr->setBuiltinInitializer(context.getIntBuiltinInitDecl(intDecl));
intExpr->setType(literalType);
expr = intExpr;
}
} else {
auto *floatExpr =
new (context) FloatLiteralExpr(printedValueCopy, SourceLoc(),
/*Implicit=*/true);
auto maxFloatTypeDecl = context.get_MaxBuiltinFloatTypeDecl();
floatExpr->setBuiltinType(maxFloatTypeDecl->getUnderlyingType());
auto *floatDecl = literalType->getAnyNominal();
floatExpr->setBuiltinInitializer(
context.getFloatBuiltinInitDecl(floatDecl));
floatExpr->setType(literalType);
expr = floatExpr;
}
if (isNegative)
cast<NumberLiteralExpr>(expr)->setNegative(SourceLoc());
break;
}
}
assert(expr);
return createConstant(name, dc, type, expr, convertKind, isStatic, ClangN);
}
ValueDecl *SwiftDeclSynthesizer::createConstant(
Identifier name, DeclContext *dc, Type type, StringRef value,
ConstantConvertKind convertKind, bool isStatic, ClangNode ClangN) {
ASTContext &ctx = ImporterImpl.SwiftContext;
auto expr = new (ctx) StringLiteralExpr(value, SourceRange());
auto literalType = getConstantLiteralType(type, convertKind);
auto *stringDecl = literalType->getAnyNominal();
expr->setBuiltinInitializer(ctx.getStringBuiltinInitDecl(stringDecl));
expr->setType(literalType);
return createConstant(name, dc, type, expr, convertKind, isStatic, ClangN);
}
/// Synthesizer callback to synthesize the getter for a constant value.
static std::pair<BraceStmt *, bool>
synthesizeConstantGetterBody(AbstractFunctionDecl *afd, void *voidContext) {
ASTContext &ctx = afd->getASTContext();
auto func = cast<AccessorDecl>(afd);
VarDecl *constantVar = cast<VarDecl>(func->getStorage());
Type type = func->mapTypeIntoContext(constantVar->getValueInterfaceType());
auto contextData =
ConstantGetterBodyContextData::getFromOpaqueValue(voidContext);
Expr *expr = contextData.getPointer();
ConstantConvertKind convertKind = contextData.getInt();
// If we need a conversion, add one now.
switch (convertKind) {
case ConstantConvertKind::None:
break;
case ConstantConvertKind::Construction:
case ConstantConvertKind::ConstructionWithUnwrap: {
auto typeRef = TypeExpr::createImplicit(type, ctx);
// Reference init(rawValue: T)
ConstructorDecl *init = nullptr;
DeclName initName =
DeclName(ctx, DeclBaseName::createConstructor(), {ctx.Id_rawValue});
auto nominal = type->getAnyNominal();
for (auto found : nominal->lookupDirect(initName)) {
init = dyn_cast<ConstructorDecl>(found);
if (init && init->getDeclContext() == nominal)
break;
}
assert(init && "did not find init(rawValue:)");
auto initTy = init->getInterfaceType()->removeArgumentLabels(1);
auto declRef = new (ctx) DeclRefExpr(init, DeclNameLoc(), /*Implicit=*/true,
AccessSemantics::Ordinary, initTy);
// (Self) -> ...
initTy = initTy->castTo<FunctionType>()->getResult();
auto initRef = DotSyntaxCallExpr::create(
ctx, declRef, SourceLoc(), Argument::unlabeled(typeRef), initTy);
initRef->setThrows(nullptr);
// (rawValue: T) -> ...
initTy = initTy->castTo<FunctionType>()->getResult();
auto *argList = ArgumentList::forImplicitSingle(ctx, ctx.Id_rawValue, expr);
auto initCall = CallExpr::createImplicit(ctx, initRef, argList);
initCall->setType(initTy);
initCall->setThrows(nullptr);
expr = initCall;
// Force unwrap if our init(rawValue:) is failable, which is currently
// the case with enums.
if (convertKind == ConstantConvertKind::ConstructionWithUnwrap) {
initTy = initTy->getOptionalObjectType();
expr = new (ctx) ForceValueExpr(expr, SourceLoc());
expr->setType(initTy);
}
assert(initTy->isEqual(type));
break;
}
}
// Create the return statement.
auto ret = ReturnStmt::createImplicit(ctx, expr);
return {BraceStmt::create(ctx, SourceLoc(), ASTNode(ret), SourceLoc()),
/*isTypeChecked=*/true};
}
ValueDecl *SwiftDeclSynthesizer::createConstant(
Identifier name, DeclContext *dc, Type type, Expr *valueExpr,
ConstantConvertKind convertKind, bool isStatic, ClangNode ClangN) {
auto &C = ImporterImpl.SwiftContext;
VarDecl *var = nullptr;
if (ClangN) {
var = ImporterImpl.createDeclWithClangNode<VarDecl>(
ClangN, AccessLevel::Public,
/*IsStatic*/ isStatic, VarDecl::Introducer::Var, SourceLoc(), name, dc);
} else {
var = new (C) VarDecl(
/*IsStatic*/ isStatic, VarDecl::Introducer::Var, SourceLoc(), name, dc);
}
var->setInterfaceType(type);
var->setIsObjC(false);
var->setIsDynamic(false);
auto *params = ParameterList::createEmpty(C);
// Create the getter function declaration.
auto func = AccessorDecl::create(
C,
/*declLoc=*/SourceLoc(),
/*AccessorKeywordLoc=*/SourceLoc(), AccessorKind::Get, var,
/*Async=*/false, /*AsyncLoc=*/SourceLoc(),
/*Throws=*/false,
/*ThrowsLoc=*/SourceLoc(), /*ThrownType=*/TypeLoc(),
params, type, dc);
func->setStatic(isStatic);
func->setAccess(getOverridableAccessLevel(dc));
func->setIsObjC(false);
func->setIsDynamic(false);
func->setBodySynthesizer(
synthesizeConstantGetterBody,
ConstantGetterBodyContextData(valueExpr, convertKind).getOpaqueValue());
// Mark the function transparent so that we inline it away completely.
func->getAttrs().add(new (C) TransparentAttr(/*implicit*/ true));
auto nonisolatedAttr =
new (C) NonisolatedAttr(/*unsafe=*/false, /*implicit=*/true);
var->getAttrs().add(nonisolatedAttr);
// Set the function up as the getter.
ImporterImpl.makeComputed(var, func, nullptr);
return var;
}
// MARK: Struct default initializers
/// Synthesize the body for an struct default initializer.
static std::pair<BraceStmt *, bool>
synthesizeStructDefaultConstructorBody(AbstractFunctionDecl *afd,
void *context) {
auto constructor = cast<ConstructorDecl>(afd);
ASTContext &ctx = constructor->getASTContext();
auto structDecl = static_cast<StructDecl *>(context);
// Use a builtin to produce a zero initializer, and assign it to self.
// Construct the left-hand reference to self.
auto *selfDecl = constructor->getImplicitSelfDecl();
Expr *lhs = new (ctx) DeclRefExpr(selfDecl, DeclNameLoc(), /*Implicit=*/true);
auto selfType = structDecl->getDeclaredInterfaceType();
lhs->setType(LValueType::get(selfType));
auto emptyTuple = TupleType::getEmpty(ctx);
// Construct the right-hand call to Builtin.zeroInitializer.
Identifier zeroInitID = ctx.getIdentifier("zeroInitializer");
auto zeroInitializerFunc =
cast<FuncDecl>(getBuiltinValueDecl(ctx, zeroInitID));
SubstitutionMap subMap = SubstitutionMap::get(
zeroInitializerFunc->getGenericSignature(), llvm::ArrayRef(selfType),
LookUpConformanceInModule());
ConcreteDeclRef concreteDeclRef(zeroInitializerFunc, subMap);
auto zeroInitializerRef =
new (ctx) DeclRefExpr(concreteDeclRef, DeclNameLoc(), /*implicit*/ true);
// FIXME: Verify ExtInfo state is correct, not working by accident.
FunctionType::ExtInfo info;
zeroInitializerRef->setType(FunctionType::get({}, selfType, info));
auto call = CallExpr::createImplicitEmpty(ctx, zeroInitializerRef);
call->setType(selfType);
call->setThrows(nullptr);
auto assign = new (ctx) AssignExpr(lhs, SourceLoc(), call, /*implicit*/ true);
assign->setType(emptyTuple);
auto *ret = ReturnStmt::createImplicit(ctx, /*expr*/ nullptr);
// Create the function body.
auto body = BraceStmt::create(ctx, SourceLoc(), {assign, ret}, SourceLoc());
return {body, /*isTypeChecked*/ true};
}
ConstructorDecl *
SwiftDeclSynthesizer::createDefaultConstructor(NominalTypeDecl *structDecl) {
auto &context = ImporterImpl.SwiftContext;
auto emptyPL = ParameterList::createEmpty(context);
// Create the constructor.
DeclName name(context, DeclBaseName::createConstructor(), emptyPL);
auto constructor = new (context)
ConstructorDecl(name, structDecl->getLoc(),
/*Failable=*/false, /*FailabilityLoc=*/SourceLoc(),
/*Async=*/false, /*AsyncLoc=*/SourceLoc(),
/*Throws=*/false, /*ThrowsLoc=*/SourceLoc(),
/*ThrownType=*/TypeLoc(), emptyPL,
/*GenericParams=*/nullptr, structDecl,
/*LifetimeDependentTypeRepr*/ nullptr);
constructor->setAccess(AccessLevel::Public);
// Mark the constructor transparent so that we inline it away completely.
constructor->getAttrs().add(new (context) TransparentAttr(/*implicit*/ true));
constructor->setBodySynthesizer(synthesizeStructDefaultConstructorBody,
structDecl);
// We're done.
return constructor;
}
// MARK: Struct value initializers
/// Synthesizer callback for the body of a struct value constructor.
static std::pair<BraceStmt *, bool>
synthesizeValueConstructorBody(AbstractFunctionDecl *afd, void *context) {
auto constructor = cast<ConstructorDecl>(afd);
ArrayRef<VarDecl *> members(static_cast<VarDecl **>(context) + 1,
static_cast<uintptr_t *>(context)[0]);
ASTContext &ctx = constructor->getASTContext();
// Assign all of the member variables appropriately.
SmallVector<ASTNode, 4> stmts;
auto *selfDecl = constructor->getImplicitSelfDecl();
// To keep DI happy, initialize stored properties before computed.
auto parameters = constructor->getParameters();
for (unsigned pass = 0; pass < 2; ++pass) {
unsigned paramPos = 0;
for (unsigned i = 0, e = members.size(); i < e; ++i) {
auto var = members[i];
if (isa_and_nonnull<clang::IndirectFieldDecl>(var->getClangDecl()))
continue;
if (var->hasStorage() == (pass != 0)) {
++paramPos;
continue;
}
// Construct left-hand side.
Expr *lhs = new (ctx) DeclRefExpr(selfDecl, DeclNameLoc(),
/*Implicit=*/true);
lhs->setType(LValueType::get(selfDecl->getTypeInContext()));
auto semantics = (var->hasStorage() ? AccessSemantics::DirectToStorage
: AccessSemantics::Ordinary);
lhs = new (ctx) MemberRefExpr(lhs, SourceLoc(), var, DeclNameLoc(),
/*Implicit=*/true, semantics);
lhs->setType(LValueType::get(var->getTypeInContext()));
// Construct right-hand side.
auto rhs = new (ctx) DeclRefExpr(parameters->get(paramPos), DeclNameLoc(),
/*Implicit=*/true);
rhs->setType(parameters->get(paramPos)->getTypeInContext());
// Add assignment.
auto assign = new (ctx) AssignExpr(lhs, SourceLoc(), rhs,
/*Implicit=*/true);
assign->setType(TupleType::getEmpty(ctx));
stmts.push_back(assign);
++paramPos;
}
}
stmts.push_back(ReturnStmt::createImplicit(ctx, /*expr*/ nullptr));
// Create the function body.
auto body = BraceStmt::create(ctx, SourceLoc(), stmts, SourceLoc());
return {body, /*isTypeChecked=*/true};
}
ConstructorDecl *SwiftDeclSynthesizer::createValueConstructor(
NominalTypeDecl *structDecl, ArrayRef<VarDecl *> members,
bool wantCtorParamNames, bool wantBody) {
auto &context = ImporterImpl.SwiftContext;
// Construct the set of parameters from the list of members.
SmallVector<ParamDecl *, 8> valueParameters;
for (auto var : members) {
if (var->isStatic())
continue;
bool generateParamName = wantCtorParamNames;
if (var->hasClangNode()) {
// TODO create value constructor with indirect fields instead of the
// generated __Anonymous_field.
if (isa<clang::IndirectFieldDecl>(var->getClangDecl()))
continue;
if (auto clangField = dyn_cast<clang::FieldDecl>(var->getClangDecl()))
if (clangField->isAnonymousStructOrUnion() ||
clangField->getDeclName().isEmpty())
generateParamName = false;
}
Identifier argName = generateParamName ? var->getName() : Identifier();
auto param =
new (context) ParamDecl(SourceLoc(), SourceLoc(), argName, SourceLoc(),
var->getName(), structDecl);
param->setSpecifier(ParamSpecifier::Default);
param->setInterfaceType(var->getInterfaceType());
ImporterImpl.recordImplicitUnwrapForDecl(
param, var->isImplicitlyUnwrappedOptional());
// Don't allow the parameter to accept temporary pointer conversions.
param->setNonEphemeralIfPossible();
valueParameters.push_back(param);
}
auto *paramList = ParameterList::create(context, valueParameters);
// Create the constructor
DeclName name(context, DeclBaseName::createConstructor(), paramList);
auto constructor = new (context)
ConstructorDecl(name, structDecl->getLoc(),
/*Failable=*/false, /*FailabilityLoc=*/SourceLoc(),
/*Async=*/false, /*AsyncLoc=*/SourceLoc(),
/*Throws=*/false, /*ThrowsLoc=*/SourceLoc(),
/*ThrownType=*/TypeLoc(), paramList,
/*GenericParams=*/nullptr, structDecl,
/*LifetimeDependentTypeRepr*/ nullptr);
constructor->setAccess(AccessLevel::Public);
// Make the constructor transparent so we inline it away completely.
constructor->getAttrs().add(new (context) TransparentAttr(/*implicit*/ true));
if (wantBody) {
auto memberMemory =
context.AllocateUninitialized<uintptr_t>(members.size() + 1);
memberMemory[0] = members.size();
for (unsigned i : indices(members)) {
memberMemory[i + 1] = reinterpret_cast<uintptr_t>(members[i]);
}
constructor->setBodySynthesizer(synthesizeValueConstructorBody,
memberMemory.data());
}
// We're done.
return constructor;
}
// MARK: Struct RawValue initializers
/// Synthesizer callback for a raw value bridging constructor body.
static std::pair<BraceStmt *, bool>
synthesizeRawValueBridgingConstructorBody(AbstractFunctionDecl *afd,
void *context) {
auto init = cast<ConstructorDecl>(afd);
VarDecl *storedRawValue = static_cast<VarDecl *>(context);
ASTContext &ctx = init->getASTContext();
auto selfDecl = init->getImplicitSelfDecl();
auto storedType = storedRawValue->getInterfaceType();
// Construct left-hand side.
Expr *lhs = new (ctx) DeclRefExpr(selfDecl, DeclNameLoc(),
/*Implicit=*/true);
lhs->setType(LValueType::get(selfDecl->getTypeInContext()));
lhs = new (ctx)
MemberRefExpr(lhs, SourceLoc(), storedRawValue, DeclNameLoc(),
/*Implicit=*/true, AccessSemantics::DirectToStorage);
lhs->setType(LValueType::get(storedType));
// Construct right-hand side.
// FIXME: get the parameter from the init, and plug it in here.
auto *paramDecl = init->getParameters()->get(0);
auto *paramRef =
new (ctx) DeclRefExpr(paramDecl, DeclNameLoc(), /*Implicit=*/true);
paramRef->setType(paramDecl->getTypeInContext());
Expr *rhs = paramRef;
if (!storedRawValue->getInterfaceType()->isEqual(paramDecl->getInterfaceType())) {
auto bridge = new (ctx) BridgeToObjCExpr(paramRef, storedType);
bridge->setType(storedType);
rhs = CoerceExpr::createImplicit(ctx, bridge, storedType);
}
// Add assignment.
auto assign = new (ctx) AssignExpr(lhs, SourceLoc(), rhs,
/*Implicit=*/true);
assign->setType(TupleType::getEmpty(ctx));
auto *ret = ReturnStmt::createImplicit(ctx, /*expr*/ nullptr);
auto body = BraceStmt::create(ctx, SourceLoc(), {assign, ret}, SourceLoc());
return {body, /*isTypeChecked=*/true};
}
ConstructorDecl *SwiftDeclSynthesizer::createRawValueBridgingConstructor(
StructDecl *structDecl, VarDecl *computedRawValue, VarDecl *storedRawValue,
bool wantLabel, bool wantBody) {
auto init = createValueConstructor(structDecl, computedRawValue,
/*wantCtorParamNames=*/wantLabel,
/*wantBody=*/false);
// Insert our custom init body
if (wantBody) {
init->setBodySynthesizer(synthesizeRawValueBridgingConstructorBody,
storedRawValue);
}
return init;
}
void SwiftDeclSynthesizer::makeStructRawValuedWithBridge(
StructDecl *structDecl, Type storedUnderlyingType, Type bridgedType,
ArrayRef<KnownProtocolKind> synthesizedProtocolAttrs,
bool makeUnlabeledValueInit) {
auto &ctx = ImporterImpl.SwiftContext;
ImporterImpl.addSynthesizedProtocolAttrs(structDecl,
synthesizedProtocolAttrs);
auto storedVarName = ctx.getIdentifier("_rawValue");
auto computedVarName = ctx.Id_rawValue;
// Create a variable to store the underlying value.
VarDecl *storedVar;
PatternBindingDecl *storedPatternBinding;
std::tie(storedVar, storedPatternBinding) = createVarWithPattern(
structDecl, storedVarName, storedUnderlyingType, VarDecl::Introducer::Var,
/*isImplicit=*/true, AccessLevel::Private, AccessLevel::Private);
// Create a computed value variable.
auto computedVar = new (ctx) VarDecl(
/*IsStatic*/ false, VarDecl::Introducer::Var, SourceLoc(),
computedVarName, structDecl);
computedVar->setInterfaceType(bridgedType);
computedVar->setImplicit();
computedVar->setAccess(AccessLevel::Public);
computedVar->setSetterAccess(AccessLevel::Private);
// Create the getter for the computed value variable.
auto computedVarGetter =
makeStructRawValueGetter(structDecl, computedVar, storedVar);
ImporterImpl.makeComputed(computedVar, computedVarGetter, nullptr);
// Create a pattern binding to describe the variable.
Pattern *computedBindingPattern = createTypedNamedPattern(computedVar);
auto *computedPatternBinding = PatternBindingDecl::createImplicit(
ctx, StaticSpellingKind::None, computedBindingPattern,
/*InitExpr*/ nullptr, structDecl);
auto init =
createRawValueBridgingConstructor(structDecl, computedVar, storedVar,
/*wantLabel*/ true,
/*wantBody*/ true);
ConstructorDecl *unlabeledCtor = nullptr;
if (makeUnlabeledValueInit)
unlabeledCtor = createRawValueBridgingConstructor(
structDecl, computedVar, storedVar,
/*wantLabel*/ false, /*wantBody*/ true);
if (unlabeledCtor)
structDecl->addMember(unlabeledCtor);
structDecl->addMember(init);
structDecl->addMember(storedPatternBinding);
structDecl->addMember(storedVar);
structDecl->addMember(computedPatternBinding);
structDecl->addMember(computedVar);
ImporterImpl.addSynthesizedTypealias(structDecl, ctx.Id_RawValue,
bridgedType);
ImporterImpl.RawTypes[structDecl] = bridgedType;
}
void SwiftDeclSynthesizer::makeStructRawValued(
StructDecl *structDecl, Type underlyingType,
ArrayRef<KnownProtocolKind> synthesizedProtocolAttrs,
MakeStructRawValuedOptions options, AccessLevel setterAccess) {
auto &ctx = ImporterImpl.SwiftContext;
ImporterImpl.addSynthesizedProtocolAttrs(structDecl,
synthesizedProtocolAttrs);
// Create a variable to store the underlying value.
VarDecl *var;
PatternBindingDecl *patternBinding;
auto introducer = (options.contains(MakeStructRawValuedFlags::IsLet)
? VarDecl::Introducer::Let
: VarDecl::Introducer::Var);
std::tie(var, patternBinding) = createVarWithPattern(
structDecl, ctx.Id_rawValue, underlyingType, introducer,
options.contains(MakeStructRawValuedFlags::IsImplicit),
AccessLevel::Public, setterAccess);
assert(var->hasStorage());
// Create constructors to initialize that value from a value of the
// underlying type.
if (options.contains(MakeStructRawValuedFlags::MakeUnlabeledValueInit))
structDecl->addMember(createValueConstructor(structDecl, var,
/*wantCtorParamNames=*/false,
/*wantBody=*/true));
auto *initRawValue = createValueConstructor(structDecl, var,
/*wantCtorParamNames=*/true,
/*wantBody=*/true);
structDecl->addMember(initRawValue);
structDecl->addMember(patternBinding);
structDecl->addMember(var);
ImporterImpl.addSynthesizedTypealias(structDecl, ctx.Id_RawValue,
underlyingType);
ImporterImpl.RawTypes[structDecl] = underlyingType;
}
// MARK: Unions
/// Synthesizer for the body of a union field getter.
static std::pair<BraceStmt *, bool>
synthesizeUnionFieldGetterBody(AbstractFunctionDecl *afd, void *context) {
auto getterDecl = cast<AccessorDecl>(afd);
ASTContext &ctx = getterDecl->getASTContext();
auto importedFieldDecl = static_cast<VarDecl *>(context);
auto selfDecl = getterDecl->getImplicitSelfDecl();
auto selfRef = new (ctx) DeclRefExpr(selfDecl, DeclNameLoc(),
/*implicit*/ true);
selfRef->setType(selfDecl->getInterfaceType());
auto reinterpretCast = cast<FuncDecl>(
getBuiltinValueDecl(ctx, ctx.getIdentifier("reinterpretCast")));
ConcreteDeclRef reinterpretCastRef(
reinterpretCast,
SubstitutionMap::get(
reinterpretCast->getGenericSignature(),
{selfDecl->getInterfaceType(), importedFieldDecl->getInterfaceType()},
LookUpConformanceInModule()));
auto reinterpretCastRefExpr =
new (ctx) DeclRefExpr(reinterpretCastRef, DeclNameLoc(),
/*implicit*/ true);
// FIXME: Verify ExtInfo state is correct, not working by accident.
FunctionType::ExtInfo info;
reinterpretCastRefExpr->setType(
FunctionType::get(AnyFunctionType::Param(selfDecl->getInterfaceType()),
importedFieldDecl->getInterfaceType(), info));
auto *argList = ArgumentList::forImplicitUnlabeled(ctx, {selfRef});
auto reinterpreted =
CallExpr::createImplicit(ctx, reinterpretCastRefExpr, argList);
reinterpreted->setType(importedFieldDecl->getInterfaceType());
reinterpreted->setThrows(nullptr);
auto *ret = ReturnStmt::createImplicit(ctx, reinterpreted);
auto body = BraceStmt::create(ctx, SourceLoc(), ASTNode(ret), SourceLoc(),
/*implicit*/ true);
return {body, /*isTypeChecked*/ true};
}
/// Synthesizer for the body of a union field setter.
static std::pair<BraceStmt *, bool>
synthesizeUnionFieldSetterBody(AbstractFunctionDecl *afd, void *context) {
auto setterDecl = cast<AccessorDecl>(afd);
ASTContext &ctx = setterDecl->getASTContext();
auto inoutSelfDecl = setterDecl->getImplicitSelfDecl();
auto inoutSelfRef = new (ctx) DeclRefExpr(inoutSelfDecl, DeclNameLoc(),
/*implicit*/ true);
inoutSelfRef->setType(LValueType::get(inoutSelfDecl->getInterfaceType()));
auto newValueDecl = setterDecl->getParameters()->get(0);
auto newValueRef = new (ctx) DeclRefExpr(newValueDecl, DeclNameLoc(),
/*implicit*/ true);
newValueRef->setType(newValueDecl->getInterfaceType());
auto addressofFn =
cast<FuncDecl>(getBuiltinValueDecl(ctx, ctx.getIdentifier("unprotectedAddressOf")));
ConcreteDeclRef addressofFnRef(
addressofFn, SubstitutionMap::get(addressofFn->getGenericSignature(),
{inoutSelfDecl->getInterfaceType()},
LookUpConformanceInModule()));
auto addressofFnRefExpr =
new (ctx) DeclRefExpr(addressofFnRef, DeclNameLoc(), /*implicit*/ true);
// FIXME: Verify ExtInfo state is correct, not working by accident.
FunctionType::ExtInfo addressOfInfo;
addressofFnRefExpr->setType(FunctionType::get(
AnyFunctionType::Param(inoutSelfDecl->getInterfaceType(), Identifier(),
ParameterTypeFlags().withInOut(true)),
ctx.TheRawPointerType, addressOfInfo));
auto *selfPtrArgs = ArgumentList::createImplicit(
ctx, {Argument::implicitInOut(ctx, inoutSelfRef)});
auto selfPointer =
CallExpr::createImplicit(ctx, addressofFnRefExpr, selfPtrArgs);
selfPointer->setType(ctx.TheRawPointerType);
selfPointer->setThrows(nullptr);
auto initializeFn =
cast<FuncDecl>(getBuiltinValueDecl(ctx, ctx.getIdentifier("initialize")));
ConcreteDeclRef initializeFnRef(
initializeFn, SubstitutionMap::get(initializeFn->getGenericSignature(),
{newValueDecl->getInterfaceType()},
LookUpConformanceInModule()));
auto initializeFnRefExpr =
new (ctx) DeclRefExpr(initializeFnRef, DeclNameLoc(), /*implicit*/ true);
// FIXME: Verify ExtInfo state is correct, not working by accident.
FunctionType::ExtInfo initializeInfo;
initializeFnRefExpr->setType(FunctionType::get(
{AnyFunctionType::Param(newValueDecl->getInterfaceType()),
AnyFunctionType::Param(ctx.TheRawPointerType)},
TupleType::getEmpty(ctx), initializeInfo));
auto *initArgs =
ArgumentList::forImplicitUnlabeled(ctx, {newValueRef, selfPointer});
auto initialize =
CallExpr::createImplicit(ctx, initializeFnRefExpr, initArgs);
initialize->setType(TupleType::getEmpty(ctx));
initialize->setThrows(nullptr);
auto body = BraceStmt::create(ctx, SourceLoc(), {initialize}, SourceLoc(),
/*implicit*/ true);
return {body, /*isTypeChecked*/ true};
}
std::pair<AccessorDecl *, AccessorDecl *>
SwiftDeclSynthesizer::makeUnionFieldAccessors(
NominalTypeDecl *importedUnionDecl, VarDecl *importedFieldDecl) {
auto &C = ImporterImpl.SwiftContext;
auto getterDecl =
makeFieldGetterDecl(ImporterImpl, importedUnionDecl, importedFieldDecl);
getterDecl->setBodySynthesizer(synthesizeUnionFieldGetterBody,
importedFieldDecl);
getterDecl->getAttrs().add(new (C) TransparentAttr(/*implicit*/ true));
auto setterDecl =
makeFieldSetterDecl(ImporterImpl, importedUnionDecl, importedFieldDecl);
setterDecl->setBodySynthesizer(synthesizeUnionFieldSetterBody,
importedFieldDecl);
setterDecl->getAttrs().add(new (C) TransparentAttr(/*implicit*/ true));
ImporterImpl.makeComputed(importedFieldDecl, getterDecl, setterDecl);
return {getterDecl, setterDecl};
}
static clang::DeclarationName
getAccessorDeclarationName(clang::ASTContext &Ctx, NominalTypeDecl *structDecl,
VarDecl *fieldDecl, const char *suffix) {
std::string id;
llvm::raw_string_ostream IdStream(id);
Mangle::ASTMangler mangler(structDecl->getASTContext());
IdStream << "$" << mangler.mangleDeclAsUSR(structDecl, "") << "$"
<< fieldDecl->getName() << "$" << suffix;
return clang::DeclarationName(&Ctx.Idents.get(IdStream.str()));
}
std::pair<FuncDecl *, FuncDecl *> SwiftDeclSynthesizer::makeBitFieldAccessors(
clang::RecordDecl *structDecl, NominalTypeDecl *importedStructDecl,
clang::FieldDecl *fieldDecl, VarDecl *importedFieldDecl) {
clang::ASTContext &Ctx = ImporterImpl.getClangASTContext();
// Getter: static inline FieldType get(RecordType self);
auto recordType = Ctx.getRecordType(structDecl);
auto recordPointerType = Ctx.getPointerType(recordType);
auto fieldType = fieldDecl->getType();
auto cGetterName = getAccessorDeclarationName(Ctx, importedStructDecl,
importedFieldDecl, "getter");
auto cGetterType =
Ctx.getFunctionType(fieldDecl->getType(), recordType,
clang::FunctionProtoType::ExtProtoInfo());
auto cGetterTypeInfo = Ctx.getTrivialTypeSourceInfo(cGetterType);
auto cGetterDecl = clang::FunctionDecl::Create(
Ctx, structDecl->getDeclContext(), clang::SourceLocation(),
clang::SourceLocation(), cGetterName, cGetterType, cGetterTypeInfo,
clang::SC_Static);
cGetterDecl->setImplicit();
cGetterDecl->setImplicitlyInline();
assert(!cGetterDecl->isExternallyVisible());
auto getterDecl = makeFieldGetterDecl(ImporterImpl, importedStructDecl,
importedFieldDecl, cGetterDecl);
// Setter: static inline void set(FieldType newValue, RecordType *self);
SmallVector<clang::QualType, 8> cSetterParamTypes;
cSetterParamTypes.push_back(fieldType);
cSetterParamTypes.push_back(recordPointerType);
auto cSetterName = getAccessorDeclarationName(Ctx, importedStructDecl,
importedFieldDecl, "setter");
auto cSetterType = Ctx.getFunctionType(
Ctx.VoidTy, cSetterParamTypes, clang::FunctionProtoType::ExtProtoInfo());
auto cSetterTypeInfo = Ctx.getTrivialTypeSourceInfo(cSetterType);