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ASTPrinter.cpp
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//===--- ASTPrinter.cpp - Swift Language AST Printer---------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
// This file implements printing for the Swift ASTs.
//
//===----------------------------------------------------------------------===//
#include "swift/AST/ArchetypeBuilder.h"
#include "swift/AST/ASTContext.h"
#include "swift/AST/ASTPrinter.h"
#include "swift/AST/ASTVisitor.h"
#include "swift/AST/Attr.h"
#include "swift/AST/Decl.h"
#include "swift/AST/Expr.h"
#include "swift/AST/Module.h"
#include "swift/AST/NameLookup.h"
#include "swift/AST/PrintOptions.h"
#include "swift/AST/Stmt.h"
#include "swift/AST/TypeVisitor.h"
#include "swift/AST/TypeWalker.h"
#include "swift/AST/Types.h"
#include "swift/Basic/Fallthrough.h"
#include "swift/Basic/PrimitiveParsing.h"
#include "swift/Basic/STLExtras.h"
#include "swift/Config.h"
#include "swift/Sema/CodeCompletionTypeChecking.h"
#include "swift/Strings.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/Basic/Module.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/SaveAndRestore.h"
#include <algorithm>
using namespace swift;
namespace swift {
class PrinterArchetypeTransformer {
Type BaseTy;
DeclContext *DC;
llvm::DenseMap<TypeBase *, Type> Cache;
llvm::DenseMap<StringRef, Type> IdMap;
public:
PrinterArchetypeTransformer(Type Ty, DeclContext *DC) :
BaseTy(Ty->getRValueType()), DC(DC){
(void) this->DC;
auto D = BaseTy->getNominalOrBoundGenericNominal();
if (!D || !D->getGenericParams())
return;
SmallVector<Type, 3> Scrach;
auto Args = BaseTy->getAllGenericArgs(Scrach);
const auto ParamDecls = D->getGenericParams()->getParams();
assert(ParamDecls.size() == Args.size());
// Map type parameter names with their instantiating arguments.
for(unsigned I = 0, N = ParamDecls.size(); I < N; I ++) {
IdMap[ParamDecls[I]->getName().str()] = Args[I];
}
}
Type transformByName(Type Ty) {
if (Ty->getKind() != TypeKind::Archetype)
return Ty;
// First, we try to find the map from cache.
if (Cache.count(Ty.getPointer()) > 0) {
return Cache[Ty.getPointer()];
}
auto Id = cast<ArchetypeType>(Ty.getPointer())->getName().str();
auto Result = Ty;
// Iterate the IdMap to find the argument type of the given param name.
for (auto It = IdMap.begin(); It != IdMap.end(); ++ It) {
if (Id == It->getFirst()) {
Result = It->getSecond();
break;
}
}
// Put the result into cache.
Cache[Ty.getPointer()] = Result;
return Result;
}
};
}
PrintOptions PrintOptions::printTypeInterface(Type T, DeclContext *DC) {
PrintOptions result = printInterface();
result.pTransformer = std::make_shared<PrinterArchetypeTransformer>(T, DC);
result.TypeToPrint = T.getPointer();
return result;
}
std::string ASTPrinter::sanitizeUtf8(StringRef Text) {
llvm::SmallString<256> Builder;
Builder.reserve(Text.size());
const UTF8* Data = reinterpret_cast<const UTF8*>(Text.begin());
const UTF8* End = reinterpret_cast<const UTF8*>(Text.end());
StringRef Replacement = "\ufffd";
while (Data < End) {
auto Step = getNumBytesForUTF8(*Data);
if (Data + Step > End) {
Builder.append(Replacement);
break;
}
if (isLegalUTF8Sequence(Data, Data + Step)) {
Builder.append(Data, Data + Step);
} else {
// If malformatted, add replacement characters.
Builder.append(Replacement);
}
Data += Step;
}
return Builder.str();
}
bool ASTPrinter::printTypeInterface(Type Ty, DeclContext *DC,
llvm::raw_ostream &OS) {
if (!Ty)
return false;
Ty = Ty->getRValueType();
PrintOptions Options = PrintOptions::printTypeInterface(Ty.getPointer(), DC);
if (auto ND = Ty->getNominalOrBoundGenericNominal()) {
Options.printExtensionContentAsMembers = [&](const ExtensionDecl *ED) {
return isExtensionApplied(*ND->getDeclContext(), Ty, ED);
};
ND->print(OS, Options);
return true;
}
return false;
}
bool ASTPrinter::printTypeInterface(Type Ty, DeclContext *DC, std::string &Buffer) {
llvm::raw_string_ostream OS(Buffer);
auto Result = printTypeInterface(Ty, DC, OS);
OS.str();
return Result;
}
void ASTPrinter::anchor() {}
void ASTPrinter::printIndent() {
llvm::SmallString<16> Str;
for (unsigned i = 0; i != CurrentIndentation; ++i)
Str += ' ';
printText(Str);
}
void ASTPrinter::printTextImpl(StringRef Text) {
if (PendingNewlines != 0) {
llvm::SmallString<16> Str;
for (unsigned i = 0; i != PendingNewlines; ++i)
Str += '\n';
PendingNewlines = 0;
printText(Str);
printIndent();
}
const Decl *PreD = PendingDeclPreCallback;
const Decl *LocD = PendingDeclLocCallback;
PendingDeclPreCallback = nullptr;
PendingDeclLocCallback = nullptr;
if (PreD) {
printDeclPre(PreD);
}
if (LocD) {
printDeclLoc(LocD);
}
printText(Text);
}
void ASTPrinter::printTypeRef(const TypeDecl *TD, Identifier Name) {
PrintNameContext Context = PrintNameContext::Normal;
if (auto GP = dyn_cast<GenericTypeParamDecl>(TD)) {
if (GP->isProtocolSelf())
Context = PrintNameContext::GenericParameter;
}
printName(Name, Context);
}
void ASTPrinter::printModuleRef(ModuleEntity Mod, Identifier Name) {
printName(Name);
}
ASTPrinter &ASTPrinter::operator<<(unsigned long long N) {
llvm::SmallString<32> Str;
llvm::raw_svector_ostream OS(Str);
OS << N;
printTextImpl(OS.str());
return *this;
}
ASTPrinter &ASTPrinter::operator<<(UUID UU) {
llvm::SmallString<UUID::StringBufferSize> Str;
UU.toString(Str);
printTextImpl(Str);
return *this;
}
/// Determine whether to escape the fiven keyword in the given context.
static bool escapeKeywordInContext(StringRef keyword, PrintNameContext context){
switch (context) {
case PrintNameContext::Normal:
return true;
case PrintNameContext::GenericParameter:
return keyword != "Self";
}
}
void ASTPrinter::printName(Identifier Name, PrintNameContext Context) {
if (Name.empty()) {
*this << "_";
return;
}
bool IsKeyword = llvm::StringSwitch<bool>(Name.str())
#define KEYWORD(KW) \
.Case(#KW, true)
#include "swift/Parse/Tokens.def"
.Default(false);
if (IsKeyword)
IsKeyword = escapeKeywordInContext(Name.str(), Context);
if (IsKeyword)
*this << "`";
*this << Name.str();
if (IsKeyword)
*this << "`";
}
void StreamPrinter::printText(StringRef Text) {
OS << Text;
}
namespace {
/// \brief AST pretty-printer.
class PrintAST : public ASTVisitor<PrintAST> {
ASTPrinter &Printer;
PrintOptions Options;
unsigned IndentLevel = 0;
friend DeclVisitor<PrintAST>;
/// \brief RAII object that increases the indentation level.
class IndentRAII {
PrintAST &Self;
bool DoIndent;
public:
IndentRAII(PrintAST &self, bool DoIndent = true)
: Self(self), DoIndent(DoIndent) {
if (DoIndent)
Self.IndentLevel += Self.Options.Indent;
}
~IndentRAII() {
if (DoIndent)
Self.IndentLevel -= Self.Options.Indent;
}
};
/// \brief Indent the current number of indentation spaces.
void indent() {
Printer.setIndent(IndentLevel);
}
/// \brief Record the location of this declaration, which is about to
/// be printed.
template<typename FnTy>
void recordDeclLoc(Decl *decl, const FnTy &Fn) {
Printer.callPrintDeclLoc(decl);
Fn();
Printer.printDeclNameEndLoc(decl);
}
void printClangDocumentationComment(const clang::Decl *D) {
const auto &ClangContext = D->getASTContext();
const clang::RawComment *RC = ClangContext.getRawCommentForAnyRedecl(D);
if (!RC)
return;
if (!Options.PrintRegularClangComments) {
Printer.printNewline();
indent();
}
bool Invalid;
unsigned StartLocCol =
ClangContext.getSourceManager().getSpellingColumnNumber(
RC->getLocStart(), &Invalid);
if (Invalid)
StartLocCol = 0;
unsigned WhitespaceToTrim = StartLocCol ? StartLocCol - 1 : 0;
SmallVector<StringRef, 8> Lines;
StringRef RawText =
RC->getRawText(ClangContext.getSourceManager()).rtrim("\n\r");
trimLeadingWhitespaceFromLines(RawText, WhitespaceToTrim, Lines);
for (auto Line : Lines) {
Printer << ASTPrinter::sanitizeUtf8(Line);
Printer.printNewline();
}
}
void printSwiftDocumentationComment(const Decl *D) {
auto RC = D->getRawComment();
if (RC.isEmpty())
return;
indent();
SmallVector<StringRef, 8> Lines;
for (const auto &SRC : RC.Comments) {
Lines.clear();
StringRef RawText = SRC.RawText.rtrim("\n\r");
unsigned WhitespaceToTrim = SRC.StartColumn - 1;
trimLeadingWhitespaceFromLines(RawText, WhitespaceToTrim, Lines);
for (auto Line : Lines) {
Printer << Line;
Printer.printNewline();
}
}
}
void printDocumentationComment(const Decl *D) {
if (!Options.PrintDocumentationComments)
return;
// Try to print a comment from Clang.
auto MaybeClangNode = D->getClangNode();
if (MaybeClangNode) {
if (auto *CD = MaybeClangNode.getAsDecl())
printClangDocumentationComment(CD);
return;
}
printSwiftDocumentationComment(D);
}
void printStaticKeyword(StaticSpellingKind StaticSpelling) {
switch (StaticSpelling) {
case StaticSpellingKind::None:
llvm_unreachable("should not be called for non-static decls");
case StaticSpellingKind::KeywordStatic:
Printer << "static ";
break;
case StaticSpellingKind::KeywordClass:
Printer<< "class ";
break;
}
}
void printAccessibility(Accessibility access, StringRef suffix = "") {
switch (access) {
case Accessibility::Private:
Printer << "private";
break;
case Accessibility::Internal:
if (!Options.PrintInternalAccessibilityKeyword)
return;
Printer << "internal";
break;
case Accessibility::Public:
Printer << "public";
break;
}
Printer << suffix << " ";
}
void printAccessibility(const ValueDecl *D) {
if (!Options.PrintAccessibility || !D->hasAccessibility() ||
D->getAttrs().hasAttribute<AccessibilityAttr>())
return;
printAccessibility(D->getFormalAccess());
if (auto storageDecl = dyn_cast<AbstractStorageDecl>(D)) {
if (auto setter = storageDecl->getSetter()) {
Accessibility setterAccess = setter->getFormalAccess();
if (setterAccess != D->getFormalAccess())
printAccessibility(setterAccess, "(set)");
}
}
}
void printTypeLoc(const TypeLoc &TL) {
if (Options.pTransformer && TL.getType()) {
if (auto RT = Options.pTransformer->transformByName(TL.getType())) {
PrintOptions FreshOptions;
RT.print(Printer, FreshOptions);
return;
}
}
// Print a TypeRepr if instructed to do so by options, or if the type
// is null.
if ((Options.PreferTypeRepr && TL.hasLocation()) ||
TL.getType().isNull()) {
TL.getTypeRepr()->print(Printer, Options);
return;
}
TL.getType().print(Printer, Options);
}
void printAttributes(const Decl *D);
void printTypedPattern(const TypedPattern *TP,
bool StripOuterSliceType = false);
public:
void printPattern(const Pattern *pattern);
void printGenericParams(GenericParamList *params);
void printWhereClause(ArrayRef<RequirementRepr> requirements);
private:
bool shouldPrint(const Decl *D, bool Notify = false);
bool shouldPrintPattern(const Pattern *P);
void printPatternType(const Pattern *P);
void printAccessors(AbstractStorageDecl *ASD);
void printMembersOfDecl(Decl * NTD, bool needComma = false);
void printMembers(ArrayRef<Decl *> members, bool needComma = false);
void printNominalDeclName(NominalTypeDecl *decl);
void printInherited(const Decl *decl,
ArrayRef<TypeLoc> inherited,
ArrayRef<ProtocolDecl *> protos,
Type superclass = {},
bool explicitClass = false,
bool PrintAsProtocolComposition = false);
void printInherited(const NominalTypeDecl *decl,
bool explicitClass = false);
void printInherited(const EnumDecl *D);
void printInherited(const ExtensionDecl *decl);
void printInherited(const GenericTypeParamDecl *D);
void printEnumElement(EnumElementDecl *elt);
/// \returns true if anything was printed.
bool printASTNodes(const ArrayRef<ASTNode> &Elements, bool NeedIndent = true);
void printOneParameter(const Pattern *BodyPattern,
bool ArgNameIsAPIByDefault,
bool StripOuterSliceType,
bool Curried);
/// \brief Print the function parameters in curried or selector style,
/// to match the original function declaration.
void printFunctionParameters(AbstractFunctionDecl *AFD);
#define DECL(Name,Parent) void visit##Name##Decl(Name##Decl *decl);
#define ABSTRACT_DECL(Name, Parent)
#define DECL_RANGE(Name,Start,End)
#include "swift/AST/DeclNodes.def"
#define STMT(Name, Parent) void visit##Name##Stmt(Name##Stmt *stmt);
#include "swift/AST/StmtNodes.def"
public:
PrintAST(ASTPrinter &Printer, const PrintOptions &Options)
: Printer(Printer), Options(Options) {}
using ASTVisitor::visit;
bool visit(Decl *D) {
if (!shouldPrint(D, true))
return false;
Printer.callPrintDeclPre(D);
ASTVisitor::visit(D);
Printer.printDeclPost(D);
return true;
}
};
} // unnamed namespace
void PrintAST::printAttributes(const Decl *D) {
if (Options.SkipAttributes)
return;
D->getAttrs().print(Printer, Options);
}
void PrintAST::printTypedPattern(const TypedPattern *TP,
bool StripOuterSliceType) {
auto TheTypeLoc = TP->getTypeLoc();
if (TheTypeLoc.hasLocation()) {
// If the outer typeloc is an InOutTypeRepr, print the inout before the
// subpattern.
if (auto *IOT = dyn_cast<InOutTypeRepr>(TheTypeLoc.getTypeRepr())) {
TheTypeLoc = TypeLoc(IOT->getBase());
Type T = TheTypeLoc.getType();
if (T) {
if (auto *IOT = T->getAs<InOutType>()) {
T = IOT->getObjectType();
TheTypeLoc.setType(T);
}
}
Printer << "inout ";
}
printPattern(TP->getSubPattern());
Printer << ": ";
if (StripOuterSliceType) {
Type T = TP->getType();
if (auto *BGT = T->getAs<BoundGenericType>()) {
BGT->getGenericArgs()[0].print(Printer, Options);
return;
}
}
printTypeLoc(TheTypeLoc);
return;
}
Type T = TP->getType();
if (auto *IOT = T->getAs<InOutType>()) {
T = IOT->getObjectType();
Printer << "inout ";
}
printPattern(TP->getSubPattern());
Printer << ": ";
if (StripOuterSliceType) {
if (auto *BGT = T->getAs<BoundGenericType>()) {
BGT->getGenericArgs()[0].print(Printer, Options);
return;
}
}
T.print(Printer, Options);
}
void PrintAST::printPattern(const Pattern *pattern) {
switch (pattern->getKind()) {
case PatternKind::Any:
Printer << "_";
break;
case PatternKind::Named: {
auto named = cast<NamedPattern>(pattern);
recordDeclLoc(named->getDecl(),
[&]{
Printer.printName(named->getBodyName());
});
break;
}
case PatternKind::Paren:
Printer << "(";
printPattern(cast<ParenPattern>(pattern)->getSubPattern());
Printer << ")";
break;
case PatternKind::Tuple: {
Printer << "(";
auto TP = cast<TuplePattern>(pattern);
auto Fields = TP->getElements();
for (unsigned i = 0, e = Fields.size(); i != e; ++i) {
const auto &Elt = Fields[i];
if (i != 0)
Printer << ", ";
if (Elt.hasEllipsis()) {
printTypedPattern(cast<TypedPattern>(Elt.getPattern()),
/*StripOuterSliceType=*/true);
Printer << "...";
} else {
printPattern(Elt.getPattern());
}
if (Elt.getDefaultArgKind() != DefaultArgumentKind::None) {
if (Options.PrintDefaultParameterPlaceholder)
Printer << " = default";
else if (Options.VarInitializers) {
// FIXME: Print initializer here.
}
}
}
Printer << ")";
break;
}
case PatternKind::Typed:
printTypedPattern(cast<TypedPattern>(pattern));
break;
case PatternKind::Is: {
auto isa = cast<IsPattern>(pattern);
Printer << "is ";
isa->getCastTypeLoc().getType().print(Printer, Options);
break;
}
case PatternKind::NominalType: {
auto type = cast<NominalTypePattern>(pattern);
type->getCastTypeLoc().getType().print(Printer, Options);
Printer << "(";
interleave(type->getElements().begin(), type->getElements().end(),
[&](const NominalTypePattern::Element &elt) {
Printer << elt.getPropertyName().str() << ":";
printPattern(elt.getSubPattern());
}, [&] {
Printer << ", ";
});
break;
}
case PatternKind::EnumElement: {
auto elt = cast<EnumElementPattern>(pattern);
// FIXME: Print element expr.
if (elt->hasSubPattern())
printPattern(elt->getSubPattern());
break;
}
case PatternKind::OptionalSome:
printPattern(cast<OptionalSomePattern>(pattern)->getSubPattern());
Printer << '?';
break;
case PatternKind::Bool:
Printer << (cast<BoolPattern>(pattern)->getValue() ? "true" : "false");
break;
case PatternKind::Expr:
// FIXME: Print expr.
break;
case PatternKind::Var:
if (!Options.SkipIntroducerKeywords)
Printer << (cast<VarPattern>(pattern)->isLet() ? "let " : "var ");
printPattern(cast<VarPattern>(pattern)->getSubPattern());
}
}
void PrintAST::printGenericParams(GenericParamList *Params) {
if (!Params)
return;
Printer << "<";
bool IsFirst = true;
SmallVector<Type, 4> Scrach;
if (Options.pTransformer) {
auto ArgArr = Options.TypeToPrint->getAllGenericArgs(Scrach);
for (auto Arg : ArgArr) {
if (IsFirst) {
IsFirst = false;
} else {
Printer << ", ";
}
auto NM = Arg->getAnyNominal();
assert(NM && "Cannot get nominal type.");
Printer << NM->getNameStr();
}
} else {
for (auto GP : Params->getParams()) {
if (IsFirst) {
IsFirst = false;
} else {
Printer << ", ";
}
Printer.printName(GP->getName());
printInherited(GP);
}
printWhereClause(Params->getRequirements());
}
Printer << ">";
}
void PrintAST::printWhereClause(ArrayRef<RequirementRepr> requirements) {
if (requirements.empty())
return;
bool isFirst = true;
for (auto &req : requirements) {
if (req.isInvalid() ||
req.getKind() == RequirementKind::WitnessMarker)
continue;
if (isFirst) {
Printer << " where ";
isFirst = false;
} else {
Printer << ", ";
}
auto asWrittenStr = req.getAsWrittenString();
if (!asWrittenStr.empty()) {
Printer << asWrittenStr;
continue;
}
switch (req.getKind()) {
case RequirementKind::Conformance:
printTypeLoc(req.getSubjectLoc());
Printer << " : ";
printTypeLoc(req.getConstraintLoc());
break;
case RequirementKind::SameType:
printTypeLoc(req.getFirstTypeLoc());
Printer << " == ";
printTypeLoc(req.getSecondTypeLoc());
break;
case RequirementKind::WitnessMarker:
llvm_unreachable("Handled above");
}
}
}
bool swift::shouldPrintPattern(const Pattern *P, PrintOptions &Options) {
bool ShouldPrint = false;
P->forEachVariable([&](VarDecl *VD) {
ShouldPrint |= shouldPrint(VD, Options);
});
return ShouldPrint;
}
bool PrintAST::shouldPrintPattern(const Pattern *P) {
return swift::shouldPrintPattern(P, Options);
}
void PrintAST::printPatternType(const Pattern *P) {
if (P->hasType()) {
Printer << ": ";
P->getType().print(Printer, Options);
}
}
bool swift::shouldPrint(const Decl *D, PrintOptions &Options) {
if (auto *ED= dyn_cast<ExtensionDecl>(D)) {
if (Options.printExtensionContentAsMembers(ED))
return false;
}
if (Options.SkipDeinit && isa<DestructorDecl>(D)) {
return false;
}
if (Options.SkipImports && isa<ImportDecl>(D)) {
return false;
}
if (Options.SkipImplicit && D->isImplicit())
return false;
if (Options.SkipUnavailable &&
D->getAttrs().isUnavailable(D->getASTContext()))
return false;
// Skip declarations that are not accessible.
if (auto *VD = dyn_cast<ValueDecl>(D)) {
if (Options.AccessibilityFilter > Accessibility::Private &&
VD->hasAccessibility() &&
VD->getFormalAccess() < Options.AccessibilityFilter)
return false;
}
if (Options.SkipPrivateStdlibDecls && D->isPrivateStdlibDecl())
return false;
if (Options.SkipEmptyExtensionDecls && isa<ExtensionDecl>(D)) {
auto Ext = cast<ExtensionDecl>(D);
// If the extension doesn't add protocols or has no members that we should
// print then skip printing it.
if (Ext->getLocalProtocols().empty()) {
bool HasMemberToPrint = false;
for (auto Member : Ext->getMembers()) {
if (shouldPrint(Member, Options)) {
HasMemberToPrint = true;
break;
}
}
if (!HasMemberToPrint)
return false;
}
}
// We need to handle PatternBindingDecl as a special case here because its
// attributes can only be retrieved from the inside VarDecls.
if (auto *PD = dyn_cast<PatternBindingDecl>(D)) {
auto ShouldPrint = false;
for (auto entry : PD->getPatternList()) {
ShouldPrint |= shouldPrintPattern(entry.getPattern(), Options);
if (ShouldPrint)
return true;
}
return false;
}
return true;
}
bool PrintAST::shouldPrint(const Decl *D, bool Notify) {
auto Result = swift::shouldPrint(D, Options);
if (!Result && Notify)
Printer.avoidPrintDeclPost(D);
return Result;
}
static bool isAccessorAssumedNonMutating(FuncDecl *accessor) {
switch (accessor->getAccessorKind()) {
case AccessorKind::IsGetter:
case AccessorKind::IsAddressor:
return true;
case AccessorKind::IsSetter:
case AccessorKind::IsWillSet:
case AccessorKind::IsDidSet:
case AccessorKind::IsMaterializeForSet:
case AccessorKind::IsMutableAddressor:
return false;
case AccessorKind::NotAccessor:
llvm_unreachable("not an addressor!");
}
llvm_unreachable("bad addressor kind");
}
static StringRef getAddressorLabel(FuncDecl *addressor) {
switch (addressor->getAddressorKind()) {
case AddressorKind::NotAddressor:
llvm_unreachable("addressor claims not to be an addressor");
case AddressorKind::Unsafe:
return "unsafeAddress";
case AddressorKind::Owning:
return "addressWithOwner";
case AddressorKind::NativeOwning:
return "addressWithNativeOwner";
case AddressorKind::NativePinning:
return "addressWithPinnedNativeOwner";
}
llvm_unreachable("bad addressor kind");
}
static StringRef getMutableAddressorLabel(FuncDecl *addressor) {
switch (addressor->getAddressorKind()) {
case AddressorKind::NotAddressor:
llvm_unreachable("addressor claims not to be an addressor");
case AddressorKind::Unsafe:
return "unsafeMutableAddress";
case AddressorKind::Owning:
return "mutableAddressWithOwner";
case AddressorKind::NativeOwning:
return "mutableAddressWithNativeOwner";
case AddressorKind::NativePinning:
return "mutableAddressWithPinnedNativeOwner";
}
llvm_unreachable("bad addressor kind");
}
void PrintAST::printAccessors(AbstractStorageDecl *ASD) {
if (isa<VarDecl>(ASD) && !Options.PrintPropertyAccessors)
return;
auto storageKind = ASD->getStorageKind();
// Never print anything for stored properties.
if (storageKind == AbstractStorageDecl::Stored)
return;
// Treat StoredWithTrivialAccessors the same as Stored unless
// we're printing for SIL, in which case we want to distinguish it
// from a pure stored property.
if (storageKind == AbstractStorageDecl::StoredWithTrivialAccessors) {
if (!Options.PrintForSIL) return;
// Don't print an accessor for a let; the parser can't handle it.
if (isa<VarDecl>(ASD) && cast<VarDecl>(ASD)->isLet())
return;
}
// We sometimes want to print the accessors abstractly
// instead of listing out how they're actually implemented.
bool inProtocol = isa<ProtocolDecl>(ASD->getDeclContext());
if (inProtocol ||
(Options.AbstractAccessors && !Options.FunctionDefinitions)) {
bool mutatingGetter = ASD->isGetterMutating();
bool settable = ASD->isSettable(nullptr);
bool nonmutatingSetter = false;
if (settable && ASD->isSetterNonMutating() && ASD->isInstanceMember() &&
!ASD->getDeclContext()->getDeclaredTypeInContext()
->hasReferenceSemantics())
nonmutatingSetter = true;
// We're about to print something like this:
// { mutating? get (nonmutating? set)? }
// But don't print "{ get set }" if we don't have to.
if (!inProtocol && !Options.PrintGetSetOnRWProperties &&
settable && !mutatingGetter && !nonmutatingSetter) {
return;
}
Printer << " {";
if (mutatingGetter) Printer << " mutating";
Printer << " get";
if (settable) {
if (nonmutatingSetter) Printer << " nonmutating";
Printer << " set";
}
Printer << " }";
return;
}
// Honor !Options.PrintGetSetOnRWProperties in the only remaining
// case where we could end up printing { get set }.
if (storageKind == AbstractStorageDecl::StoredWithTrivialAccessors ||
storageKind == AbstractStorageDecl::Computed) {
if (!Options.PrintGetSetOnRWProperties &&
!Options.FunctionDefinitions &&
ASD->getSetter() &&
!ASD->getGetter()->isMutating() &&
!ASD->getSetter()->isExplicitNonMutating()) {
return;
}
}
// Otherwise, print all the concrete defining accessors.
bool PrintAccessorBody = Options.FunctionDefinitions;
auto PrintAccessor = [&](FuncDecl *Accessor, StringRef Label) {
if (!Accessor)
return;
if (!PrintAccessorBody) {
if (isAccessorAssumedNonMutating(Accessor)) {
if (Accessor->isMutating())
Printer << " mutating";
} else {
if (Accessor->isExplicitNonMutating()) {
Printer << " nonmutating";
}
}
Printer << " " << Label;
} else {
Printer.printNewline();
IndentRAII IndentMore(*this);
indent();
visit(Accessor);
}
};
auto PrintAddressor = [&](FuncDecl *accessor) {
if (!accessor) return;
PrintAccessor(accessor, getAddressorLabel(accessor));
};
auto PrintMutableAddressor = [&](FuncDecl *accessor) {
if (!accessor) return;
PrintAccessor(accessor, getMutableAddressorLabel(accessor));
};
Printer << " {";
switch (storageKind) {
case AbstractStorageDecl::Stored:
llvm_unreachable("filtered out above!");
case AbstractStorageDecl::StoredWithTrivialAccessors:
case AbstractStorageDecl::Computed:
PrintAccessor(ASD->getGetter(), "get");
PrintAccessor(ASD->getSetter(), "set");
break;
case AbstractStorageDecl::StoredWithObservers:
case AbstractStorageDecl::InheritedWithObservers:
PrintAccessor(ASD->getWillSetFunc(), "willSet");
PrintAccessor(ASD->getDidSetFunc(), "didSet");
break;
case AbstractStorageDecl::Addressed:
case AbstractStorageDecl::AddressedWithTrivialAccessors:
case AbstractStorageDecl::AddressedWithObservers:
PrintAddressor(ASD->getAddressor());
PrintMutableAddressor(ASD->getMutableAddressor());
if (ASD->hasObservers()) {
PrintAccessor(ASD->getWillSetFunc(), "willSet");
PrintAccessor(ASD->getDidSetFunc(), "didSet");
}
break;
case AbstractStorageDecl::ComputedWithMutableAddress:
PrintAccessor(ASD->getGetter(), "get");