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Utils.cpp
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//===--- Utils.cpp - Misc utilities ---------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 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 "swift/IDE/Utils.h"
#include "swift/AST/SourceFile.h"
#include "swift/Basic/Edit.h"
#include "swift/Basic/Platform.h"
#include "swift/Basic/SourceManager.h"
#include "swift/ClangImporter/ClangModule.h"
#include "swift/Parse/Parser.h"
#include "swift/Subsystems.h"
#include "clang/AST/ASTContext.h"
#include "clang/Rewrite/Core/RewriteBuffer.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
using namespace swift;
using namespace ide;
static const char *skipStringInCode(const char *p, const char *End);
static const char *skipParenExpression(const char *p, const char *End) {
const char *e = p;
if (*e == '(') {
uint32_t ParenCount = 1;
bool done = false;
for (++e; e < End; ++e) {
switch (*e) {
case ')':
done = --ParenCount == 0;
break;
case '(':
++ParenCount;
break;
case '"':
e = skipStringInCode (e, End);
break;
default:
break;
}
// If "done" is true make sure we don't increment "e"
if (done)
break;
}
}
if (e >= End)
return End;
return e;
}
static const char *skipStringInCode(const char *p, const char *End) {
const char *e = p;
if (*e == '"') {
bool done = false;
for (++e; e < End; ++e) {
switch (*e) {
case '"':
done = true;
break;
case '\\':
++e;
if (e >= End)
done = true;
else if (*e == '(')
e = skipParenExpression (e, End);
break;
default:
break;
}
// If "done" is true make sure we don't increment "e"
if (done)
break;
}
}
if (e >= End)
return End;
return e;
}
SourceCompleteResult
ide::isSourceInputComplete(std::unique_ptr<llvm::MemoryBuffer> MemBuf,
SourceFileKind SFKind) {
SourceManager SM;
auto BufferID = SM.addNewSourceBuffer(std::move(MemBuf));
ParserUnit Parse(SM, SFKind, BufferID);
Parse.parse();
SourceCompleteResult SCR;
SCR.IsComplete = !Parse.getParser().isInputIncomplete();
// Use the same code that was in the REPL code to track the indent level
// for now. In the future we should get this from the Parser if possible.
CharSourceRange entireRange = SM.getRangeForBuffer(BufferID);
StringRef Buffer = SM.extractText(entireRange);
const char *SourceStart = Buffer.data();
const char *SourceEnd = Buffer.data() + Buffer.size();
const char *LineStart = SourceStart;
const char *LineSourceStart = nullptr;
uint32_t LineIndent = 0;
struct IndentInfo {
StringRef Prefix;
uint32_t Indent;
IndentInfo(const char *s, size_t n, uint32_t i) :
Prefix(s, n),
Indent(i) {}
};
SmallVector<IndentInfo, 4> IndentInfos;
for (const char *p = SourceStart; p<SourceEnd; ++p) {
switch (*p) {
case '\r':
case '\n':
LineIndent = 0;
LineSourceStart = nullptr;
LineStart = p + 1;
break;
case '"':
p = skipStringInCode (p, SourceEnd);
break;
case '{':
case '(':
case '[':
++LineIndent;
if (LineSourceStart == nullptr)
IndentInfos.push_back(IndentInfo(LineStart,
p - LineStart,
LineIndent));
else
IndentInfos.push_back(IndentInfo(LineStart,
LineSourceStart - LineStart,
LineIndent));
break;
case '}':
case ')':
case ']':
if (LineIndent > 0)
--LineIndent;
if (!IndentInfos.empty())
IndentInfos.pop_back();
break;
default:
if (LineSourceStart == nullptr && !isspace(*p))
LineSourceStart = p;
break;
}
if (*p == '\0')
break;
}
if (!IndentInfos.empty()) {
SCR.IndentPrefix = IndentInfos.back().Prefix.str();
// Trim off anything that follows a non-space character
const size_t pos = SCR.IndentPrefix.find_first_not_of(" \t");
if (pos != std::string::npos)
SCR.IndentPrefix.erase(pos);
SCR.IndentLevel = IndentInfos.back().Indent;
}
return SCR;
}
SourceCompleteResult
ide::isSourceInputComplete(StringRef Text,SourceFileKind SFKind) {
return ide::isSourceInputComplete(llvm::MemoryBuffer::getMemBufferCopy(Text),
SFKind);
}
template <typename FnTy>
static void walkOverriddenClangDecls(const clang::NamedDecl *D, const FnTy &Fn){
SmallVector<const clang::NamedDecl *, 8> OverDecls;
D->getASTContext().getOverriddenMethods(D, OverDecls);
for (auto Over : OverDecls)
Fn(Over);
for (auto Over : OverDecls)
walkOverriddenClangDecls(Over, Fn);
}
void
ide::walkOverriddenDecls(const ValueDecl *VD,
llvm::function_ref<void(llvm::PointerUnion<
const ValueDecl*, const clang::NamedDecl*>)> Fn) {
for (auto CurrOver = VD; CurrOver; CurrOver = CurrOver->getOverriddenDecl()) {
if (CurrOver != VD)
Fn(CurrOver);
if (auto ClangD =
dyn_cast_or_null<clang::NamedDecl>(CurrOver->getClangDecl())) {
walkOverriddenClangDecls(ClangD, Fn);
return;
}
for (auto Conf: CurrOver->getSatisfiedProtocolRequirements())
Fn(Conf);
}
}
/// \returns true if a placeholder was found.
static bool findPlaceholder(StringRef Input, PlaceholderOccurrence &Occur) {
while (true) {
size_t Pos = Input.find("<#");
if (Pos == StringRef::npos)
return false;
const char *Begin = Input.begin() + Pos;
const char *Ptr = Begin + 2;
const char *End = Input.end();
for (; Ptr < End-1; ++Ptr) {
if (*Ptr == '\n')
break;
if (Ptr[0] == '<' && Ptr[1] == '#')
break;
if (Ptr[0] == '#' && Ptr[1] == '>') {
// Found it.
Occur.FullPlaceholder = Input.substr(Pos, Ptr-Begin + 2);
Occur.PlaceholderContent =
Occur.FullPlaceholder.drop_front(2).drop_back(2);
return true;
}
}
// Try again.
Input = Input.substr(Ptr - Input.begin());
}
}
std::unique_ptr<llvm::MemoryBuffer>
ide::replacePlaceholders(std::unique_ptr<llvm::MemoryBuffer> InputBuf,
llvm::function_ref<void(const PlaceholderOccurrence &)> Callback) {
StringRef Input = InputBuf->getBuffer();
PlaceholderOccurrence Occur;
bool Found = findPlaceholder(Input, Occur);
if (!Found)
return InputBuf;
std::unique_ptr<llvm::MemoryBuffer> NewBuf =
llvm::MemoryBuffer::getMemBufferCopy(InputBuf->getBuffer(),
InputBuf->getBufferIdentifier());
unsigned Counter = 0;
auto replacePlaceholder = [&](PlaceholderOccurrence &Occur) {
llvm::SmallString<10> Id;
Id = "$_";
llvm::raw_svector_ostream(Id) << (Counter++);
assert(Occur.FullPlaceholder.size() >= 2);
if (Id.size() > Occur.FullPlaceholder.size()) {
// The identifier+counter exceeds placeholder size; replace it without
// using the counter.
Id = "$";
Id.append(Occur.FullPlaceholder.size()-1, '_');
} else {
Id.append(Occur.FullPlaceholder.size()-Id.size(), '_');
}
assert(Id.size() == Occur.FullPlaceholder.size());
unsigned Offset = Occur.FullPlaceholder.data() - InputBuf->getBufferStart();
char *Ptr = const_cast<char *>(NewBuf->getBufferStart()) + Offset;
std::copy(Id.begin(), Id.end(), Ptr);
Occur.IdentifierReplacement = Id.str();
Callback(Occur);
};
while (true) {
replacePlaceholder(Occur);
unsigned Offset = Occur.FullPlaceholder.data() - InputBuf->getBufferStart();
Input = InputBuf->getBuffer().substr(Offset+Occur.FullPlaceholder.size());
bool Found = findPlaceholder(Input, Occur);
if (!Found)
break;
}
return NewBuf;
}
std::unique_ptr<llvm::MemoryBuffer>
ide::replacePlaceholders(std::unique_ptr<llvm::MemoryBuffer> InputBuf,
bool *HadPlaceholder) {
if (HadPlaceholder)
*HadPlaceholder = false;
return replacePlaceholders(std::move(InputBuf),
[&](const PlaceholderOccurrence &){
if (HadPlaceholder)
*HadPlaceholder = true;
});
}
// Modules failing to load are commented-out.
static const char *OSXModuleList[] = {
"AGL",
"AVFoundation",
"AVKit",
"Accelerate",
"Accounts",
"AddressBook",
"AppKit",
"AppKitScripting",
"AppleScriptKit",
"AppleScriptObjC",
"ApplicationServices",
"AudioToolbox",
"AudioUnit",
"AudioVideoBridging",
"Automator",
"CFNetwork",
// "CalendarStore",
"Carbon",
"CloudKit",
"Cocoa",
"Collaboration",
"Contacts",
"CoreAudio",
"CoreAudioKit",
"CoreBluetooth",
"CoreData",
"CoreFoundation",
"CoreGraphics",
"CoreImage",
"CoreLocation",
"CoreMIDI",
// "CoreMIDIServer",
"CoreMedia",
"CoreMediaIO",
"CoreServices",
"CoreTelephony",
"CoreText",
"CoreVideo",
"CoreWLAN",
// "CryptoTokenKit",
// "DVComponentGlue",
"DVDPlayback",
"Darwin",
"DirectoryService",
"DiscRecording",
"DiscRecordingUI",
"DiskArbitration",
"Dispatch",
// "DrawSprocket",
"EventKit",
"ExceptionHandling",
"FWAUserLib",
"FinderSync",
"ForceFeedback",
"Foundation",
"GLKit",
"GLUT",
"GSS",
"GameController",
"GameKit",
"GameplayKit",
"Hypervisor",
// "ICADevices",
"IMServicePlugIn",
"IOBluetooth",
"IOBluetoothUI",
"IOKit",
"IOSurface",
"ImageCaptureCore",
"ImageIO",
"InputMethodKit",
// "InstallerPlugins",
// "InstantMessage",
// "JavaFrameEmbedding",
"JavaScriptCore",
// "JavaVM",
// "Kerberos",
// "LDAP",
"LatentSemanticMapping",
"LocalAuthentication",
"MachO",
"MapKit",
"MediaAccessibility",
"MediaLibrary",
"MediaToolbox",
// "Message",
"Metal",
"MetalKit",
"ModelIO",
"MultipeerConnectivity",
"NetFS",
// "NetworkExtension",
"NotificationCenter",
"OSAKit",
"ObjectiveC",
"OpenAL",
"OpenCL",
"OpenDirectory",
"OpenGL",
// "PCSC",
"PreferencePanes",
"PubSub",
"Python",
// "QTKit", QTKit is unavailable on Swift.
"Quartz",
"QuartzCore",
"QuickLook",
"QuickTime",
// "Ruby",
"SceneKit",
"ScreenSaver",
"Scripting",
"ScriptingBridge",
"Security",
"SecurityFoundation",
"SecurityInterface",
// "ServiceManagement",
"Social",
"SpriteKit",
"StoreKit",
// "SyncServices",
"SystemConfiguration",
"TWAIN",
"Tcl",
// "VideoDecodeAcceleration",
"VideoToolbox",
"WebKit",
"XPC",
"libkern",
"os",
// "vecLib",
"vmnet",
};
// Modules failing to load are commented-out.
static const char *iOSModuleList[] = {
"AVFoundation",
"AVKit",
"Accelerate",
"Accounts",
"AdSupport",
"AddressBook",
"AddressBookUI",
"AssetsLibrary",
"AudioToolbox",
"AudioUnit",
"CFNetwork",
"CloudKit",
"Contacts",
"ContactsUI",
"CoreAudio",
"CoreAudioKit",
"CoreBluetooth",
"CoreData",
"CoreFoundation",
"CoreGraphics",
"CoreImage",
"CoreLocation",
"CoreMIDI",
"CoreMedia",
"CoreMotion",
"CoreSpotlight",
"CoreTelephony",
"CoreText",
"CoreVideo",
"Darwin",
"Dispatch",
"EventKit",
"EventKitUI",
"ExternalAccessory",
"Foundation",
"GLKit",
"GSS",
"GameController",
"GameFoundation",
"GameKit",
"GameplayKit",
"HealthKit",
"HomeKit",
"IMCommonCore",
// "IOKit",
"ImageIO",
"JavaScriptCore",
"LocalAuthentication",
"MachO",
"MapKit",
"MediaAccessibility",
"MediaPlayer",
"MediaToolbox",
"MessageUI",
"MobileCoreServices",
"ModelIO",
"MultipeerConnectivity",
"NetworkExtension",
"NewsstandKit",
"NotificationCenter",
"ObjectiveC",
"OpenAL",
"OpenGLES",
"PassKit",
"Photos",
"PhotosUI",
"PushKit",
"QuartzCore",
"QuickLook",
"SafariServices",
"SceneKit",
"ScreenRecorder",
"Security",
"Social",
"SpriteKit",
"StoreKit",
"SystemConfiguration",
"Twitter",
"UIKit",
"UIKit.UIGestureRecognizerSubclass",
"VideoToolbox",
"WatchConnectivity",
"WatchKit",
"WebKit",
"iAd",
"libkern",
"os",
};
static const char *DeviceOnlyModuleList[] = {
"Metal",
"MetalKit",
"MetalShaders",
};
static ArrayRef<const char *> getOSXModuleList() {
return OSXModuleList;
}
static ArrayRef<const char *> getiOSModuleList() {
return iOSModuleList;
}
static ArrayRef<const char *> getDeviceOnlyModuleList() {
return DeviceOnlyModuleList;
}
void ide::collectModuleNames(StringRef SDKPath,
std::vector<std::string> &Modules) {
std::string SDKName = getSDKName(SDKPath);
std::string lowerSDKName = StringRef(SDKName).lower();
bool isOSXSDK = StringRef(lowerSDKName).contains("macosx");
bool isDeviceOnly = StringRef(lowerSDKName).contains("iphoneos");
auto Mods = isOSXSDK ? getOSXModuleList() : getiOSModuleList();
Modules.insert(Modules.end(), Mods.begin(), Mods.end());
if (isDeviceOnly) {
Mods = getDeviceOnlyModuleList();
Modules.insert(Modules.end(), Mods.begin(), Mods.end());
}
}
DeclNameViewer::DeclNameViewer(StringRef Text): IsValid(true), HasParen(false) {
auto ArgStart = Text.find_first_of('(');
if (ArgStart == StringRef::npos) {
BaseName = Text;
return;
}
HasParen = true;
BaseName = Text.substr(0, ArgStart);
auto ArgEnd = Text.find_last_of(')');
if (ArgEnd == StringRef::npos) {
IsValid = false;
return;
}
StringRef AllArgs = Text.substr(ArgStart + 1, ArgEnd - ArgStart - 1);
AllArgs.split(Labels, ":");
if (Labels.empty())
return;
if ((IsValid = Labels.back().empty())) {
Labels.pop_back();
llvm::transform(Labels, Labels.begin(), [](StringRef Label) {
return Label == "_" ? StringRef() : Label;
});
}
}
unsigned DeclNameViewer::commonPartsCount(DeclNameViewer &Other) const {
if (base() != Other.base())
return 0;
unsigned Result = 1;
unsigned Len = std::min(args().size(), Other.args().size());
for (unsigned I = 0; I < Len; ++ I) {
if (args()[I] == Other.args()[I])
++Result;
else
return Result;
}
return Result;
}
void swift::ide::SourceEditConsumer::
accept(SourceManager &SM, SourceLoc Loc, StringRef Text,
ArrayRef<NoteRegion> SubRegions) {
accept(SM, CharSourceRange(Loc, 0), Text, SubRegions);
}
void swift::ide::SourceEditConsumer::
accept(SourceManager &SM, CharSourceRange Range, StringRef Text,
ArrayRef<NoteRegion> SubRegions) {
accept(SM, RegionType::ActiveCode,
{{/*Path=*/{}, Range, /*BufferName=*/{}, Text, SubRegions}});
}
void swift::ide::SourceEditConsumer::
insertAfter(SourceManager &SM, SourceLoc Loc, StringRef Text,
ArrayRef<NoteRegion> SubRegions) {
accept(SM, Lexer::getLocForEndOfToken(SM, Loc), Text, SubRegions);
}
void swift::ide::SourceEditConsumer::
remove(SourceManager &SM, CharSourceRange Range) {
accept(SM, Range, "");
}
/// Given the expanded code for a particular macro, perform whitespace
/// adjustments to make the refactoring more suitable for inline insertion.
static StringRef
adjustMacroExpansionWhitespace(GeneratedSourceInfo::Kind kind,
StringRef expandedCode,
llvm::SmallString<64> &scratch) {
scratch.clear();
switch (kind) {
case GeneratedSourceInfo::MemberAttributeMacroExpansion:
// Attributes are added to the beginning, add a space to separate from
// any existing.
scratch += expandedCode;
scratch += " ";
return scratch;
case GeneratedSourceInfo::MemberMacroExpansion:
case GeneratedSourceInfo::PeerMacroExpansion:
case GeneratedSourceInfo::ConformanceMacroExpansion:
case GeneratedSourceInfo::ExtensionMacroExpansion:
// All added to the end. Note that conformances are always expanded as
// extensions, hence treating them the same as peer.
scratch += "\n\n";
scratch += expandedCode;
scratch += "\n";
return scratch;
case GeneratedSourceInfo::ExpressionMacroExpansion:
case GeneratedSourceInfo::DeclarationMacroExpansion:
case GeneratedSourceInfo::CodeItemMacroExpansion:
case GeneratedSourceInfo::AccessorMacroExpansion:
case GeneratedSourceInfo::ReplacedFunctionBody:
case GeneratedSourceInfo::PrettyPrinted:
return expandedCode;
}
}
void swift::ide::SourceEditConsumer::acceptMacroExpansionBuffer(
SourceManager &SM, unsigned bufferID, SourceFile *containingSF,
bool adjustExpansion, bool includeBufferName) {
auto generatedInfo = SM.getGeneratedSourceInfo(bufferID);
if (!generatedInfo || generatedInfo->originalSourceRange.isInvalid())
return;
auto rewrittenBuffer = SM.extractText(generatedInfo->generatedSourceRange);
// If there's no change, drop the edit entirely.
if (generatedInfo->originalSourceRange.getStart() ==
generatedInfo->originalSourceRange.getEnd() &&
rewrittenBuffer.empty())
return;
SmallString<64> scratchBuffer;
if (adjustExpansion) {
rewrittenBuffer = adjustMacroExpansionWhitespace(
generatedInfo->kind, rewrittenBuffer, scratchBuffer);
}
// `containingFile` is the file of the actual expansion site, where as
// `originalFile` is the possibly enclosing buffer. Concretely:
// ```
// // m.swift
// @AddMemberAttributes
// struct Foo {
// // --- expanded from @AddMemberAttributes eg. @_someBufferName ---
// @AddedAttribute
// // ---
// let someMember: Int
// }
// ```
//
// When expanding `AddedAttribute`, the expansion actually applies to the
// original source (`m.swift`) rather than the buffer of the expansion
// site (`@_someBufferName`). Thus, we need to include the path to the
// original source as well. Note that this path could itself be another
// expansion.
auto originalSourceRange = generatedInfo->originalSourceRange;
SourceFile *originalFile =
containingSF->getParentModule()->getSourceFileContainingLocation(
originalSourceRange.getStart());
StringRef originalPath;
if (originalFile->getBufferID().has_value() &&
containingSF->getBufferID() != originalFile->getBufferID()) {
originalPath = SM.getIdentifierForBuffer(*originalFile->getBufferID());
}
StringRef bufferName;
if (includeBufferName) {
bufferName = SM.getIdentifierForBuffer(bufferID);
}
accept(SM, {originalPath,
originalSourceRange,
bufferName,
rewrittenBuffer,
{}});
}
struct swift::ide::SourceEditJsonConsumer::Implementation {
llvm::raw_ostream &OS;
SourceEdits AllEdits;
Implementation(llvm::raw_ostream &OS) : OS(OS) {}
~Implementation() {
writeEditsInJson(AllEdits, OS);
}
void accept(SourceManager &SM, CharSourceRange Range,
llvm::StringRef Text) {
AllEdits.addEdit(SM, Range, Text);
}
};
swift::ide::SourceEditJsonConsumer::SourceEditJsonConsumer(llvm::raw_ostream &OS) :
Impl(*new Implementation(OS)) {}
swift::ide::SourceEditJsonConsumer::~SourceEditJsonConsumer() { delete &Impl; }
void swift::ide::SourceEditJsonConsumer::
accept(SourceManager &SM, RegionType Type, ArrayRef<Replacement> Replacements) {
for (const auto &Replacement: Replacements) {
Impl.accept(SM, Replacement.Range, Replacement.Text);
}
}
void swift::ide::SourceEditTextConsumer::
accept(SourceManager &SM, RegionType Type, ArrayRef<Replacement> Replacements) {
for (const auto &Replacement: Replacements) {
OS << "// ";
StringRef Path = Replacement.Path;
if (Path.empty()) {
unsigned BufID = SM.findBufferContainingLoc(Replacement.Range.getStart());
Path = SM.getIdentifierForBuffer(BufID);
} else {
OS << "explicit ";
}
OS << Path.str() << " ";
auto Start = SM.getLineAndColumnInBuffer(Replacement.Range.getStart());
auto End = SM.getLineAndColumnInBuffer(Replacement.Range.getEnd());
OS << Start.first << ":" << Start.second << " -> ";
OS << End.first << ":" << End.second;
if (Replacement.BufferName.empty()) {
OS << " (" << Replacement.BufferName << ")\n";
} else {
OS << "\n";
}
OS << Replacement.Text << "\n";
}
}
namespace {
class ClangFileRewriterHelper {
unsigned InterestedId;
clang::RewriteBuffer RewriteBuf;
bool HasChange;
llvm::raw_ostream &OS;
void removeCommentLines(clang::RewriteBuffer &Buffer, StringRef Input,
StringRef LineHeader) {
size_t Pos = 0;
while (true) {
Pos = Input.find(LineHeader, Pos);
if (Pos == StringRef::npos)
break;
Pos = Input.substr(0, Pos).rfind("//");
assert(Pos != StringRef::npos);
size_t EndLine = Input.find('\n', Pos);
assert(EndLine != StringRef::npos);
++EndLine;
Buffer.RemoveText(Pos, EndLine-Pos);
Pos = EndLine;
}
}
public:
ClangFileRewriterHelper(SourceManager &SM, unsigned InterestedId,
llvm::raw_ostream &OS)
: InterestedId(InterestedId), HasChange(false), OS(OS) {
StringRef Input(SM.getLLVMSourceMgr().getMemoryBuffer(InterestedId)->
getBuffer());
RewriteBuf.Initialize(Input);
removeCommentLines(RewriteBuf, Input, "RUN");
removeCommentLines(RewriteBuf, Input, "CHECK");
}
void replaceText(SourceManager &SM, CharSourceRange Range, StringRef Text) {
auto BufferId = SM.findBufferContainingLoc(Range.getStart());
if (BufferId == InterestedId) {
HasChange = true;
auto StartLoc = SM.getLocOffsetInBuffer(Range.getStart(), BufferId);
if (!Range.getByteLength())
RewriteBuf.InsertText(StartLoc, Text);
else
RewriteBuf.ReplaceText(StartLoc, Range.str().size(), Text);
}
}
~ClangFileRewriterHelper() {
if (HasChange)
RewriteBuf.write(OS);
}
};
} // end anonymous namespace
struct swift::ide::SourceEditOutputConsumer::Implementation {
ClangFileRewriterHelper Rewriter;
Implementation(SourceManager &SM, unsigned BufferId, llvm::raw_ostream &OS)
: Rewriter(SM, BufferId, OS) {}
void accept(SourceManager &SM, CharSourceRange Range, StringRef Text) {
Rewriter.replaceText(SM, Range, Text);
}
};
swift::ide::SourceEditOutputConsumer::
SourceEditOutputConsumer(SourceManager &SM, unsigned BufferId,
llvm::raw_ostream &OS) : Impl(*new Implementation(SM, BufferId, OS)) {}
swift::ide::SourceEditOutputConsumer::~SourceEditOutputConsumer() { delete &Impl; }
void swift::ide::SourceEditOutputConsumer::
accept(SourceManager &SM, RegionType RegionType,
ArrayRef<Replacement> Replacements) {
// ignore mismatched or
if (RegionType == RegionType::Unmatched || RegionType == RegionType::Mismatch)
return;
for (const auto &Replacement : Replacements) {
Impl.accept(SM, Replacement.Range, Replacement.Text);
}
}
void swift::ide::BroadcastingSourceEditConsumer::accept(
SourceManager &SM, RegionType RegionType,
ArrayRef<Replacement> Replacements) {
for (auto &Consumer : Consumers) {
Consumer->accept(SM, RegionType, Replacements);
}
}
bool swift::ide::isFromClang(const Decl *D) {
if (getEffectiveClangNode(D))
return true;
if (auto *Ext = dyn_cast<ExtensionDecl>(D))
return static_cast<bool>(extensionGetClangNode(Ext));
return false;
}
ClangNode swift::ide::getEffectiveClangNode(const Decl *decl) {
auto &ctx = decl->getASTContext();
auto *importer = static_cast<ClangImporter *>(ctx.getClangModuleLoader());
return importer->getEffectiveClangNode(decl);
}
/// Retrieve the Clang node for the given extension, if it has one.
ClangNode swift::ide::extensionGetClangNode(const ExtensionDecl *ext) {
// If it has a Clang node (directly),
if (ext->hasClangNode()) return ext->getClangNode();
// Check whether it was syntheszed into a module-scope context.
if (!isa<ClangModuleUnit>(ext->getModuleScopeContext()))
return ClangNode();
// It may have a global imported as a member.
for (auto member : ext->getMembers()) {
if (auto clangNode = getEffectiveClangNode(member))
return clangNode;
}
return ClangNode();
}
std::pair<Type, ConcreteDeclRef> swift::ide::getReferencedDecl(Expr *expr,
bool semantic) {
if (semantic)
expr = expr->getSemanticsProvidingExpr();
auto exprTy = expr->getType();
// Look through unbound instance member accesses.
if (auto *dotSyntaxExpr = dyn_cast<DotSyntaxBaseIgnoredExpr>(expr))
expr = dotSyntaxExpr->getRHS();
// Look through the 'self' application.
if (auto *selfApplyExpr = dyn_cast<SelfApplyExpr>(expr))
expr = selfApplyExpr->getFn();
// Look through curry thunks.
if (auto *closure = dyn_cast<AutoClosureExpr>(expr))
if (auto *unwrappedThunk = closure->getUnwrappedCurryThunkExpr())
expr = unwrappedThunk;
// If this is an IUO result, unwrap the optional type.
auto refDecl = expr->getReferencedDecl();
if (!refDecl) {
if (auto *applyExpr = dyn_cast<ApplyExpr>(expr)) {
auto fnDecl = applyExpr->getFn()->getReferencedDecl();
if (auto *func = fnDecl.getDecl()) {
if (func->isImplicitlyUnwrappedOptional()) {
if (auto objectTy = exprTy->getOptionalObjectType())
exprTy = objectTy;
}
}
}
}
return std::make_pair(exprTy, refDecl);
}
bool swift::ide::isBeingCalled(ArrayRef<Expr *> ExprStack) {
if (ExprStack.empty())
return false;
Expr *Target = ExprStack.back();
auto UnderlyingDecl = getReferencedDecl(Target).second;
for (Expr *E: reverse(ExprStack)) {
auto *LE = dyn_cast<LiteralExpr>(E);
if (LE && getReferencedDecl(LE).second == UnderlyingDecl)
return true;
auto *CE = dyn_cast<CollectionExpr>(E);
if (CE && getReferencedDecl(CE).second == UnderlyingDecl)
return true;
auto *AE = dyn_cast<ApplyExpr>(E);
if (!AE || AE->isImplicit())
continue;
if (auto *CRCE = dyn_cast<ConstructorRefCallExpr>(AE->getFn())) {
auto *Base = CRCE->getBase();
while (auto *ICE = dyn_cast<ImplicitConversionExpr>(Base))
Base = ICE->getSubExpr();
if (Base == Target)
return true;
}
if (isa<SelfApplyExpr>(AE))
continue;
if (getReferencedDecl(AE->getFn()).second == UnderlyingDecl)
return true;
}
return false;
}
static Expr *getContainingExpr(ArrayRef<Expr *> ExprStack, size_t index) {
if (ExprStack.size() > index)
return ExprStack.end()[-std::ptrdiff_t(index + 1)];
return nullptr;
}
Expr *swift::ide::getBase(ArrayRef<Expr *> ExprStack) {
if (ExprStack.empty())
return nullptr;
Expr *CurrentE = ExprStack.back();
Expr *ParentE = getContainingExpr(ExprStack, 1);
if (ParentE && isa<FunctionConversionExpr>(ParentE)) {
ParentE = getContainingExpr(ExprStack, 2);
}
Expr *Base = nullptr;
if (auto DSE = dyn_cast_or_null<DotSyntaxCallExpr>(ParentE))
Base = DSE->getBase();
else if (auto MRE = dyn_cast<MemberRefExpr>(CurrentE))
Base = MRE->getBase();
else if (auto SE = dyn_cast<SubscriptExpr>(CurrentE))
Base = SE->getBase();
// Look through curry thunks
if (auto ACE = dyn_cast_or_null<AutoClosureExpr>(Base))
if (auto *Unwrapped = ACE->getUnwrappedCurryThunkExpr())
Base = Unwrapped;
if (Base) {
while (auto ICE = dyn_cast<ImplicitConversionExpr>(Base))
Base = ICE->getSubExpr();
// DotSyntaxCallExpr with getBase() == CurrentE (ie. the current call is
// the base of another expression)
if (Base == CurrentE)