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aaa5008ec6
ccls/src/indexer.cc
Fangrui Song 0d4f4b68c0 Remove ls prefix from many LSP interfaces 
Rename SymbolKind to Kind & lsSymbolKind to SymbolKind
Use textDocumentSync: TextDocumentSyncOptions
2019-11-09 20:09:13 -08:00

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// Copyright 2017-2018 ccls Authors
// SPDX-License-Identifier: Apache-2.0
#include "indexer.hh"
#include "clang_complete.hh"
#include "clang_tu.hh"
#include "log.hh"
#include "match.hh"
#include "pipeline.hh"
#include "platform.hh"
#include "serializer.hh"
#include <clang/AST/AST.h>
#include <clang/Frontend/FrontendAction.h>
#include <clang/Index/IndexDataConsumer.h>
#include <clang/Index/IndexingAction.h>
#include <clang/Index/USRGeneration.h>
#include <clang/Lex/PreprocessorOptions.h>
#include <llvm/ADT/DenseSet.h>
#include <llvm/Support/CrashRecoveryContext.h>
#include <llvm/Support/Path.h>
#include <algorithm>
#include <inttypes.h>
#include <map>
#include <unordered_set>
using namespace clang;
namespace ccls {
namespace {
constexpr int kInitializerMaxLines = 3;
GroupMatch *multiVersionMatcher;
struct File {
std::string path;
int64_t mtime;
std::string content;
std::unique_ptr<IndexFile> db;
};
struct IndexParam {
std::unordered_map<llvm::sys::fs::UniqueID, File> UID2File;
std::unordered_map<llvm::sys::fs::UniqueID, bool> UID2multi;
struct DeclInfo {
Usr usr;
std::string short_name;
std::string qualified;
};
std::unordered_map<const Decl *, DeclInfo> Decl2Info;
VFS &vfs;
ASTContext *Ctx;
IndexParam(VFS &vfs) : vfs(vfs) {}
void SeenFile(const FileEntry &File) {
// If this is the first time we have seen the file (ignoring if we are
// generating an index for it):
auto [it, inserted] = UID2File.try_emplace(File.getUniqueID());
if (inserted) {
std::string path = PathFromFileEntry(File);
it->second.path = path;
it->second.mtime = File.getModificationTime();
if (!it->second.mtime)
if (auto tim = LastWriteTime(path))
it->second.mtime = *tim;
if (std::optional<std::string> content = ReadContent(path))
it->second.content = *content;
if (!vfs.Stamp(path, it->second.mtime, 1))
return;
it->second.db = std::make_unique<IndexFile>(File.getUniqueID(), path,
it->second.content);
}
}
IndexFile *ConsumeFile(const FileEntry &FE) {
SeenFile(FE);
return UID2File[FE.getUniqueID()].db.get();
}
bool UseMultiVersion(const FileEntry &FE) {
auto it = UID2multi.try_emplace(FE.getUniqueID());
if (it.second)
it.first->second = multiVersionMatcher->IsMatch(PathFromFileEntry(FE));
return it.first->second;
}
};
StringRef GetSourceInRange(const SourceManager &SM, const LangOptions &LangOpts,
SourceRange R) {
SourceLocation BLoc = R.getBegin(), ELoc = R.getEnd();
std::pair<FileID, unsigned> BInfo = SM.getDecomposedLoc(BLoc),
EInfo = SM.getDecomposedLoc(ELoc);
bool invalid = false;
StringRef Buf = SM.getBufferData(BInfo.first, &invalid);
if (invalid)
return "";
return Buf.substr(BInfo.second,
EInfo.second +
Lexer::MeasureTokenLength(ELoc, SM, LangOpts) -
BInfo.second);
}
Kind GetKind(const Decl *D, SymbolKind &kind) {
switch (D->getKind()) {
case Decl::LinkageSpec:
return Kind::Invalid;
case Decl::Namespace:
kind = SymbolKind::Namespace;
return Kind::Type;
case Decl::NamespaceAlias:
kind = SymbolKind::TypeAlias;
return Kind::Type;
case Decl::ObjCCategory:
case Decl::ObjCImplementation:
case Decl::ObjCInterface:
case Decl::ObjCProtocol:
kind = SymbolKind::Interface;
return Kind::Type;
case Decl::ObjCMethod:
kind = SymbolKind::Method;
return Kind::Func;
case Decl::ObjCProperty:
kind = SymbolKind::Property;
return Kind::Type;
case Decl::ClassTemplate:
kind = SymbolKind::Class;
return Kind::Type;
case Decl::FunctionTemplate:
kind = SymbolKind::Function;
return Kind::Func;
case Decl::TypeAliasTemplate:
kind = SymbolKind::TypeAlias;
return Kind::Type;
case Decl::VarTemplate:
kind = SymbolKind::Variable;
return Kind::Var;
case Decl::TemplateTemplateParm:
kind = SymbolKind::TypeParameter;
return Kind::Type;
case Decl::Enum:
kind = SymbolKind::Enum;
return Kind::Type;
case Decl::CXXRecord:
case Decl::Record:
kind = SymbolKind::Class;
// spec has no Union, use Class
if (auto *RD = dyn_cast<RecordDecl>(D))
if (RD->getTagKind() == TTK_Struct)
kind = SymbolKind::Struct;
return Kind::Type;
case Decl::ClassTemplateSpecialization:
case Decl::ClassTemplatePartialSpecialization:
kind = SymbolKind::Class;
return Kind::Type;
case Decl::TypeAlias:
case Decl::Typedef:
case Decl::UnresolvedUsingTypename:
kind = SymbolKind::TypeAlias;
return Kind::Type;
case Decl::Binding:
kind = SymbolKind::Variable;
return Kind::Var;
case Decl::Field:
case Decl::ObjCIvar:
kind = SymbolKind::Field;
return Kind::Var;
case Decl::Function:
kind = SymbolKind::Function;
return Kind::Func;
case Decl::CXXMethod: {
const auto *MD = cast<CXXMethodDecl>(D);
kind = MD->isStatic() ? SymbolKind::StaticMethod : SymbolKind::Method;
return Kind::Func;
}
case Decl::CXXConstructor:
kind = SymbolKind::Constructor;
return Kind::Func;
case Decl::CXXConversion:
case Decl::CXXDestructor:
kind = SymbolKind::Method;
return Kind::Func;
case Decl::Var:
case Decl::Decomposition:
kind = SymbolKind::Variable;
return Kind::Var;
case Decl::ImplicitParam:
case Decl::ParmVar:
// ccls extension
kind = SymbolKind::Parameter;
return Kind::Var;
case Decl::VarTemplateSpecialization:
case Decl::VarTemplatePartialSpecialization:
kind = SymbolKind::Variable;
return Kind::Var;
case Decl::EnumConstant:
kind = SymbolKind::EnumMember;
return Kind::Var;
case Decl::UnresolvedUsingValue:
kind = SymbolKind::Variable;
return Kind::Var;
case Decl::TranslationUnit:
return Kind::Invalid;
default:
LOG_S(INFO) << "unhandled " << int(D->getKind());
return Kind::Invalid;
}
}
LanguageId GetDeclLanguage(const Decl *D) {
switch (D->getKind()) {
default:
return LanguageId::C;
case Decl::ImplicitParam:
case Decl::ObjCAtDefsField:
case Decl::ObjCCategory:
case Decl::ObjCCategoryImpl:
case Decl::ObjCCompatibleAlias:
case Decl::ObjCImplementation:
case Decl::ObjCInterface:
case Decl::ObjCIvar:
case Decl::ObjCMethod:
case Decl::ObjCProperty:
case Decl::ObjCPropertyImpl:
case Decl::ObjCProtocol:
case Decl::ObjCTypeParam:
return LanguageId::ObjC;
case Decl::CXXConstructor:
case Decl::CXXConversion:
case Decl::CXXDestructor:
case Decl::CXXMethod:
case Decl::CXXRecord:
case Decl::ClassTemplate:
case Decl::ClassTemplatePartialSpecialization:
case Decl::ClassTemplateSpecialization:
case Decl::Friend:
case Decl::FriendTemplate:
case Decl::FunctionTemplate:
case Decl::LinkageSpec:
case Decl::Namespace:
case Decl::NamespaceAlias:
case Decl::NonTypeTemplateParm:
case Decl::StaticAssert:
case Decl::TemplateTemplateParm:
case Decl::TemplateTypeParm:
case Decl::UnresolvedUsingTypename:
case Decl::UnresolvedUsingValue:
case Decl::Using:
case Decl::UsingDirective:
case Decl::UsingShadow:
return LanguageId::Cpp;
}
}
// clang/lib/AST/DeclPrinter.cpp
QualType GetBaseType(QualType T, bool deduce_auto) {
QualType BaseType = T;
while (!BaseType.isNull() && !BaseType->isSpecifierType()) {
if (const PointerType *PTy = BaseType->getAs<PointerType>())
BaseType = PTy->getPointeeType();
else if (const BlockPointerType *BPy = BaseType->getAs<BlockPointerType>())
BaseType = BPy->getPointeeType();
else if (const ArrayType *ATy = dyn_cast<ArrayType>(BaseType))
BaseType = ATy->getElementType();
else if (const VectorType *VTy = BaseType->getAs<VectorType>())
BaseType = VTy->getElementType();
else if (const ReferenceType *RTy = BaseType->getAs<ReferenceType>())
BaseType = RTy->getPointeeType();
else if (const ParenType *PTy = BaseType->getAs<ParenType>())
BaseType = PTy->desugar();
else if (deduce_auto) {
if (const AutoType *ATy = BaseType->getAs<AutoType>())
BaseType = ATy->getDeducedType();
else
break;
} else
break;
}
return BaseType;
}
const Decl *GetTypeDecl(QualType T, bool *specialization = nullptr) {
Decl *D = nullptr;
T = GetBaseType(T.getUnqualifiedType(), true);
const Type *TP = T.getTypePtrOrNull();
if (!TP)
return nullptr;
try_again:
switch (TP->getTypeClass()) {
case Type::Typedef:
D = cast<TypedefType>(TP)->getDecl();
break;
case Type::ObjCObject:
D = cast<ObjCObjectType>(TP)->getInterface();
break;
case Type::ObjCInterface:
D = cast<ObjCInterfaceType>(TP)->getDecl();
break;
case Type::Record:
case Type::Enum:
D = cast<TagType>(TP)->getDecl();
break;
case Type::TemplateTypeParm:
D = cast<TemplateTypeParmType>(TP)->getDecl();
break;
case Type::TemplateSpecialization:
if (specialization)
*specialization = true;
if (const RecordType *Record = TP->getAs<RecordType>())
D = Record->getDecl();
else
D = cast<TemplateSpecializationType>(TP)
->getTemplateName()
.getAsTemplateDecl();
break;
case Type::Auto:
case Type::DeducedTemplateSpecialization:
TP = cast<DeducedType>(TP)->getDeducedType().getTypePtrOrNull();
if (TP)
goto try_again;
break;
case Type::InjectedClassName:
D = cast<InjectedClassNameType>(TP)->getDecl();
break;
// FIXME: Template type parameters!
case Type::Elaborated:
TP = cast<ElaboratedType>(TP)->getNamedType().getTypePtrOrNull();
goto try_again;
default:
break;
}
return D;
}
const Decl *GetAdjustedDecl(const Decl *D) {
while (D) {
if (auto *R = dyn_cast<CXXRecordDecl>(D)) {
if (auto *S = dyn_cast<ClassTemplateSpecializationDecl>(R)) {
if (!S->getTypeAsWritten()) {
llvm::PointerUnion<ClassTemplateDecl *,
ClassTemplatePartialSpecializationDecl *>
Result = S->getSpecializedTemplateOrPartial();
if (Result.is<ClassTemplateDecl *>())
D = Result.get<ClassTemplateDecl *>();
else
D = Result.get<ClassTemplatePartialSpecializationDecl *>();
continue;
}
} else if (auto *D1 = R->getInstantiatedFromMemberClass()) {
D = D1;
continue;
}
} else if (auto *ED = dyn_cast<EnumDecl>(D)) {
if (auto *D1 = ED->getInstantiatedFromMemberEnum()) {
D = D1;
continue;
}
}
break;
}
return D;
}
bool ValidateRecord(const RecordDecl *RD) {
for (const auto *I : RD->fields()) {
QualType FQT = I->getType();
if (FQT->isIncompleteType() || FQT->isDependentType())
return false;
if (const RecordType *ChildType = I->getType()->getAs<RecordType>())
if (const RecordDecl *Child = ChildType->getDecl())
if (!ValidateRecord(Child))
return false;
}
return true;
}
class IndexDataConsumer : public index::IndexDataConsumer {
public:
ASTContext *Ctx;
IndexParam &param;
std::string GetComment(const Decl *D) {
SourceManager &SM = Ctx->getSourceManager();
const RawComment *RC = Ctx->getRawCommentForAnyRedecl(D);
if (!RC)
return "";
StringRef Raw = RC->getRawText(Ctx->getSourceManager());
SourceRange R = RC->getSourceRange();
std::pair<FileID, unsigned> BInfo = SM.getDecomposedLoc(R.getBegin());
unsigned start_column = SM.getLineNumber(BInfo.first, BInfo.second);
std::string ret;
int pad = -1;
for (const char *p = Raw.data(), *E = Raw.end(); p < E;) {
// The first line starts with a comment marker, but the rest needs
// un-indenting.
unsigned skip = start_column - 1;
for (; skip > 0 && p < E && (*p == ' ' || *p == '\t'); p++)
skip--;
const char *q = p;
while (q < E && *q != '\n')
q++;
if (q < E)
q++;
// A minimalist approach to skip Doxygen comment markers.
// See https://www.stack.nl/~dimitri/doxygen/manual/docblocks.html
if (pad < 0) {
// First line, detect the length of comment marker and put into |pad|
const char *begin = p;
while (p < E && (*p == '/' || *p == '*' || *p == '-' || *p == '='))
p++;
if (p < E && (*p == '<' || *p == '!'))
p++;
if (p < E && *p == ' ')
p++;
if (p + 1 == q)
p++;
else
pad = int(p - begin);
} else {
// Other lines, skip |pad| bytes
int prefix = pad;
while (prefix > 0 && p < E &&
(*p == ' ' || *p == '/' || *p == '*' || *p == '<' || *p == '!'))
prefix--, p++;
}
ret.insert(ret.end(), p, q);
p = q;
}
while (ret.size() && isspace(ret.back()))
ret.pop_back();
if (StringRef(ret).endswith("*/") || StringRef(ret).endswith("\n/"))
ret.resize(ret.size() - 2);
while (ret.size() && isspace(ret.back()))
ret.pop_back();
return ret;
}
Usr GetUsr(const Decl *D, IndexParam::DeclInfo **info = nullptr) const {
D = D->getCanonicalDecl();
auto [it, inserted] = param.Decl2Info.try_emplace(D);
if (inserted) {
SmallString<256> USR;
index::generateUSRForDecl(D, USR);
auto &info = it->second;
info.usr = HashUsr(USR);
if (auto *ND = dyn_cast<NamedDecl>(D)) {
info.short_name = ND->getNameAsString();
info.qualified = ND->getQualifiedNameAsString();
SimplifyAnonymous(info.qualified);
}
}
if (info)
*info = &it->second;
return it->second.usr;
}
PrintingPolicy GetDefaultPolicy() const {
PrintingPolicy PP(Ctx->getLangOpts());
PP.AnonymousTagLocations = false;
PP.TerseOutput = true;
PP.PolishForDeclaration = true;
PP.ConstantsAsWritten = true;
PP.SuppressTagKeyword = true;
PP.SuppressInitializers = true;
PP.FullyQualifiedName = false;
return PP;
}
static void SimplifyAnonymous(std::string &name) {
for (std::string::size_type i = 0;;) {
if ((i = name.find("(anonymous ", i)) == std::string::npos)
break;
i++;
if (name.size() - i > 19 && name.compare(i + 10, 9, "namespace") == 0)
name.replace(i, 19, "anon ns");
else
name.replace(i, 9, "anon");
}
}
template <typename Def>
void SetName(const Decl *D, std::string_view short_name,
std::string_view qualified, Def &def) {
SmallString<256> Str;
llvm::raw_svector_ostream OS(Str);
D->print(OS, GetDefaultPolicy());
std::string name = OS.str();
SimplifyAnonymous(name);
// Remove \n in DeclPrinter.cpp "{\n" + if(!TerseOutput)something + "}"
for (std::string::size_type i = 0;;) {
if ((i = name.find("{\n}", i)) == std::string::npos)
break;
name.replace(i, 3, "{}");
}
auto i = name.find(short_name);
if (short_name.size())
while (i != std::string::npos && ((i && isalnum(name[i - 1])) ||
isalnum(name[i + short_name.size()])))
i = name.find(short_name, i + short_name.size());
if (i == std::string::npos) {
// e.g. operator type-parameter-1
i = 0;
def.short_name_offset = 0;
} else if (short_name.size() && (!i || name[i - 1] != ':')) {
name.replace(i, short_name.size(), qualified);
def.short_name_offset = i + qualified.size() - short_name.size();
} else {
def.short_name_offset = i;
}
def.short_name_size = short_name.size();
for (int paren = 0; i; i--) {
// Skip parentheses in "(anon struct)::name"
if (name[i - 1] == ')')
paren++;
else if (name[i - 1] == '(')
paren--;
else if (!(paren > 0 || isalnum(name[i - 1]) || name[i - 1] == '_' ||
name[i - 1] == ':'))
break;
}
def.qual_name_offset = i;
def.detailed_name = Intern(name);
}
void SetVarName(const Decl *D, std::string_view short_name,
std::string_view qualified, IndexVar::Def &def) {
QualType T;
const Expr *init = nullptr;
bool binding = false;
if (auto *VD = dyn_cast<VarDecl>(D)) {
T = VD->getType();
init = VD->getAnyInitializer();
def.storage = VD->getStorageClass();
} else if (auto *FD = dyn_cast<FieldDecl>(D)) {
T = FD->getType();
init = FD->getInClassInitializer();
} else if (auto *BD = dyn_cast<BindingDecl>(D)) {
T = BD->getType();
binding = true;
}
if (!T.isNull() && (binding || T->getContainedDeducedType())) {
SmallString<256> Str;
llvm::raw_svector_ostream OS(Str);
PrintingPolicy PP = GetDefaultPolicy();
T.print(OS, PP);
if (Str.size() &&
(Str.back() != ' ' && Str.back() != '*' && Str.back() != '&'))
Str += ' ';
def.qual_name_offset = Str.size();
def.short_name_offset = Str.size() + qualified.size() - short_name.size();
def.short_name_size = short_name.size();
Str += StringRef(qualified.data(), qualified.size());
def.detailed_name = Intern(Str);
} else {
SetName(D, short_name, qualified, def);
}
if (init) {
SourceManager &SM = Ctx->getSourceManager();
const LangOptions &Lang = Ctx->getLangOpts();
SourceRange R = SM.getExpansionRange(init->getSourceRange())
#if LLVM_VERSION_MAJOR >= 7
.getAsRange()
#endif
;
SourceLocation L = D->getLocation();
if (L.isMacroID() || !SM.isBeforeInTranslationUnit(L, R.getBegin()))
return;
StringRef Buf = GetSourceInRange(SM, Lang, R);
Twine Init = Buf.count('\n') <= kInitializerMaxLines - 1
? Buf.size() && Buf[0] == ':' ? Twine(" ", Buf)
: Twine(" = ", Buf)
: Twine();
Twine T = def.detailed_name + Init;
def.hover =
def.storage == SC_Static && strncmp(def.detailed_name, "static ", 7)
? Intern(("static " + T).str())
: Intern(T.str());
}
}
static int GetFileLID(IndexFile *db, SourceManager &SM, const FileEntry &FE) {
auto [it, inserted] = db->uid2lid_and_path.try_emplace(FE.getUniqueID());
if (inserted) {
it->second.first = db->uid2lid_and_path.size() - 1;
SmallString<256> Path = FE.tryGetRealPathName();
if (Path.empty())
Path = FE.getName();
if (!llvm::sys::path::is_absolute(Path) &&
!SM.getFileManager().makeAbsolutePath(Path))
return -1;
it->second.second = llvm::sys::path::convert_to_slash(Path.str());
}
return it->second.first;
}
void AddMacroUse(IndexFile *db, SourceManager &SM, Usr usr, Kind kind,
SourceLocation Spell) const {
const FileEntry *FE = SM.getFileEntryForID(SM.getFileID(Spell));
if (!FE)
return;
int lid = GetFileLID(db, SM, *FE);
if (lid < 0)
return;
Range spell =
FromTokenRange(SM, Ctx->getLangOpts(), SourceRange(Spell, Spell));
Use use{{spell, Role::Dynamic}, lid};
switch (kind) {
case Kind::Func:
db->ToFunc(usr).uses.push_back(use);
break;
case Kind::Type:
db->ToType(usr).uses.push_back(use);
break;
case Kind::Var:
db->ToVar(usr).uses.push_back(use);
break;
default:
llvm_unreachable("");
}
}
void CollectRecordMembers(IndexType &type, const RecordDecl *RD) {
SmallVector<std::pair<const RecordDecl *, int>, 2> Stack{{RD, 0}};
llvm::DenseSet<const RecordDecl *> Seen;
Seen.insert(RD);
while (Stack.size()) {
int offset;
std::tie(RD, offset) = Stack.back();
Stack.pop_back();
if (!RD->isCompleteDefinition() || RD->isDependentType() ||
RD->isInvalidDecl() || !ValidateRecord(RD))
offset = -1;
for (FieldDecl *FD : RD->fields()) {
int offset1 = offset < 0 ? -1 : offset + Ctx->getFieldOffset(FD);
if (FD->getIdentifier())
type.def.vars.emplace_back(GetUsr(FD), offset1);
else if (const auto *RT1 = FD->getType()->getAs<RecordType>()) {
if (const RecordDecl *RD1 = RT1->getDecl())
if (Seen.insert(RD1).second)
Stack.push_back({RD1, offset1});
}
}
}
}
public:
IndexDataConsumer(IndexParam &param) : param(param) {}
void initialize(ASTContext &Ctx) override { this->Ctx = param.Ctx = &Ctx; }
bool handleDeclOccurence(const Decl *D, index::SymbolRoleSet Roles,
ArrayRef<index::SymbolRelation> Relations,
#if LLVM_VERSION_MAJOR >= 7
SourceLocation Loc,
#else
FileID LocFID, unsigned LocOffset,
#endif
ASTNodeInfo ASTNode) override {
SourceManager &SM = Ctx->getSourceManager();
const LangOptions &Lang = Ctx->getLangOpts();
#if LLVM_VERSION_MAJOR < 7
SourceLocation Loc;
{
const SrcMgr::SLocEntry &Entry = SM.getSLocEntry(LocFID);
unsigned off = Entry.getOffset() + LocOffset;
if (!Entry.isFile())
off |= 1u << 31;
Loc = SourceLocation::getFromRawEncoding(off);
}
#else
FileID LocFID;
#endif
SourceLocation Spell = SM.getSpellingLoc(Loc);
const FileEntry *FE;
Range loc;
#if LLVM_VERSION_MAJOR < 7
CharSourceRange R;
if (SM.isMacroArgExpansion(Loc))
R = CharSourceRange::getTokenRange(Spell);
else {
auto P = SM.getExpansionRange(Loc);
R = CharSourceRange::getTokenRange(P.first, P.second);
}
#else
auto R = SM.isMacroArgExpansion(Loc) ? CharSourceRange::getTokenRange(Spell)
: SM.getExpansionRange(Loc);
#endif
loc = FromCharSourceRange(SM, Lang, R);
LocFID = SM.getFileID(R.getBegin());
FE = SM.getFileEntryForID(LocFID);
if (!FE)
return true;
int lid = -1;
IndexFile *db;
if (g_config->index.multiVersion && param.UseMultiVersion(*FE)) {
db = param.ConsumeFile(*SM.getFileEntryForID(SM.getMainFileID()));
if (!db)
return true;
param.SeenFile(*FE);
if (!SM.isInMainFile(R.getBegin()))
lid = GetFileLID(db, SM, *FE);
} else {
db = param.ConsumeFile(*FE);
if (!db)
return true;
}
// spell, extent, comments use OrigD while most others use adjusted |D|.
const Decl *OrigD = ASTNode.OrigD;
const DeclContext *SemDC = OrigD->getDeclContext()->getRedeclContext();
const DeclContext *LexDC = ASTNode.ContainerDC->getRedeclContext();
{
const NamespaceDecl *ND;
while ((ND = dyn_cast<NamespaceDecl>(cast<Decl>(SemDC))) &&
ND->isAnonymousNamespace())
SemDC = ND->getDeclContext()->getRedeclContext();
while ((ND = dyn_cast<NamespaceDecl>(cast<Decl>(LexDC))) &&
ND->isAnonymousNamespace())
LexDC = ND->getDeclContext()->getRedeclContext();
}
Role role = static_cast<Role>(Roles);
db->language = LanguageId((int)db->language | (int)GetDeclLanguage(D));
bool is_decl = Roles & uint32_t(index::SymbolRole::Declaration);
bool is_def = Roles & uint32_t(index::SymbolRole::Definition);
if (is_decl && D->getKind() == Decl::Binding)
is_def = true;
IndexFunc *func = nullptr;
IndexType *type = nullptr;
IndexVar *var = nullptr;
SymbolKind ls_kind;
Kind kind = GetKind(D, ls_kind);
if (is_def)
switch (D->getKind()) {
case Decl::CXXConversion: // *operator* int => *operator int*
case Decl::CXXDestructor: // *~*A => *~A*
case Decl::CXXMethod: // *operator*= => *operator=*
case Decl::Function: // operator delete
if (Loc.isFileID()) {
SourceRange R =
cast<FunctionDecl>(OrigD)->getNameInfo().getSourceRange();
if (R.getEnd().isFileID())
loc = FromTokenRange(SM, Lang, R);
}
break;
default:
break;
}
else {
// e.g. typedef Foo<int> gg; => Foo has an unadjusted `D`
const Decl *D1 = GetAdjustedDecl(D);
if (D1 && D1 != D)
D = D1;
}
IndexParam::DeclInfo *info;
Usr usr = GetUsr(D, &info);
auto do_def_decl = [&](auto *entity) {
Use use{{loc, role}, lid};
if (is_def) {
SourceRange R = OrigD->getSourceRange();
entity->def.spell = {use,
FromTokenRangeDefaulted(SM, Lang, R, FE, loc)};
entity->def.parent_kind = SymbolKind::File;
GetKind(cast<Decl>(SemDC), entity->def.parent_kind);
} else if (is_decl) {
SourceRange R = OrigD->getSourceRange();
entity->declarations.push_back(
{use, FromTokenRangeDefaulted(SM, Lang, R, FE, loc)});
} else {
entity->uses.push_back(use);
return;
}
if (entity->def.comments[0] == '\0' && g_config->index.comments)
entity->def.comments = Intern(GetComment(OrigD));
};
switch (kind) {
case Kind::Invalid:
LOG_S(INFO) << "Unhandled " << int(D->getKind()) << " " << info->qualified
<< " in " << db->path << ":" << loc.start.line + 1;
return true;
case Kind::File:
return true;
case Kind::Func:
func = &db->ToFunc(usr);
func->def.kind = ls_kind;
// Mark as Role::Implicit to span one more column to the left/right.
if (!is_def && !is_decl &&
(D->getKind() == Decl::CXXConstructor ||
D->getKind() == Decl::CXXConversion))
role = Role(role | Role::Implicit);
do_def_decl(func);
if (Spell != Loc)
AddMacroUse(db, SM, usr, Kind::Func, Spell);
if (func->def.detailed_name[0] == '\0')
SetName(D, info->short_name, info->qualified, func->def);
if (is_def || is_decl) {
const Decl *DC = cast<Decl>(SemDC);
if (GetKind(DC, ls_kind) == Kind::Type)
db->ToType(GetUsr(DC)).def.funcs.push_back(usr);
} else {
const Decl *DC = cast<Decl>(LexDC);
if (GetKind(DC, ls_kind) == Kind::Func)
db->ToFunc(GetUsr(DC))
.def.callees.push_back({loc, usr, Kind::Func, role});
}
break;
case Kind::Type:
type = &db->ToType(usr);
type->def.kind = ls_kind;
do_def_decl(type);
if (Spell != Loc)
AddMacroUse(db, SM, usr, Kind::Type, Spell);
if (type->def.detailed_name[0] == '\0' && info->short_name.size())
SetName(D, info->short_name, info->qualified, type->def);
if (is_def || is_decl) {
const Decl *DC = cast<Decl>(SemDC);
if (GetKind(DC, ls_kind) == Kind::Type)
db->ToType(GetUsr(DC)).def.types.push_back(usr);
}
break;
case Kind::Var:
var = &db->ToVar(usr);
var->def.kind = ls_kind;
do_def_decl(var);
if (Spell != Loc)
AddMacroUse(db, SM, usr, Kind::Var, Spell);
if (var->def.detailed_name[0] == '\0')
SetVarName(D, info->short_name, info->qualified, var->def);
QualType T;
if (auto *VD = dyn_cast<ValueDecl>(D))
T = VD->getType();
if (is_def || is_decl) {
const Decl *DC = cast<Decl>(SemDC);
Kind kind = GetKind(DC, var->def.parent_kind);
if (kind == Kind::Func)
db->ToFunc(GetUsr(DC)).def.vars.push_back(usr);
else if (kind == Kind::Type && !isa<RecordDecl>(SemDC))
db->ToType(GetUsr(DC)).def.vars.emplace_back(usr, -1);
if (!T.isNull()) {
if (auto *BT = T->getAs<BuiltinType>()) {
Usr usr1 = static_cast<Usr>(BT->getKind());
var->def.type = usr1;
if (!isa<EnumConstantDecl>(D))
db->ToType(usr1).instances.push_back(usr);
} else if (const Decl *D1 = GetAdjustedDecl(GetTypeDecl(T))) {
if (isa<TemplateTypeParmDecl>(D1)) {
// e.g. TemplateTypeParmDecl is not handled by
// handleDeclOccurence.
SourceRange R1 = D1->getSourceRange();
if (SM.getFileID(R1.getBegin()) == LocFID) {
IndexParam::DeclInfo *info1;
Usr usr1 = GetUsr(D1, &info1);
IndexType &type1 = db->ToType(usr1);
SourceLocation L1 = D1->getLocation();
type1.def.spell = {
Use{{FromTokenRange(SM, Lang, {L1, L1}), Role::Definition},
lid},
FromTokenRange(SM, Lang, R1)};
type1.def.detailed_name = Intern(info1->short_name);
type1.def.short_name_size = int16_t(info1->short_name.size());
type1.def.kind = SymbolKind::TypeParameter;
type1.def.parent_kind = SymbolKind::Class;
var->def.type = usr1;
type1.instances.push_back(usr);
break;
}
}
IndexParam::DeclInfo *info1;
Usr usr1 = GetUsr(D1, &info1);
var->def.type = usr1;
if (!isa<EnumConstantDecl>(D))
db->ToType(usr1).instances.push_back(usr);
}
}
} else if (!var->def.spell && var->declarations.empty()) {
// e.g. lambda parameter
SourceLocation L = D->getLocation();
if (SM.getFileID(L) == LocFID) {
var->def.spell = {
Use{{FromTokenRange(SM, Lang, {L, L}), Role::Definition}, lid},
FromTokenRange(SM, Lang, D->getSourceRange())};
var->def.parent_kind = SymbolKind::Method;
}
}
break;
}
switch (D->getKind()) {
case Decl::Namespace:
if (D->isFirstDecl()) {
auto *ND = cast<NamespaceDecl>(D);
auto *ND1 = cast<Decl>(ND->getParent());
if (isa<NamespaceDecl>(ND1)) {
Usr usr1 = GetUsr(ND1);
type->def.bases.push_back(usr1);
db->ToType(usr1).derived.push_back(usr);
}
}
break;
case Decl::NamespaceAlias: {
auto *NAD = cast<NamespaceAliasDecl>(D);
if (const NamespaceDecl *ND = NAD->getNamespace()) {
Usr usr1 = GetUsr(ND);
type->def.alias_of = usr1;
(void)db->ToType(usr1);
}
break;
}
case Decl::CXXRecord:
if (is_def) {
auto *RD = dyn_cast<CXXRecordDecl>(D);
if (RD && RD->hasDefinition())
for (const CXXBaseSpecifier &Base : RD->bases())
if (const Decl *BaseD =
GetAdjustedDecl(GetTypeDecl(Base.getType()))) {
Usr usr1 = GetUsr(BaseD);
type->def.bases.push_back(usr1);
db->ToType(usr1).derived.push_back(usr);
}
}
[[fallthrough]];
case Decl::Record:
if (auto *RD = dyn_cast<RecordDecl>(D)) {
if (type->def.detailed_name[0] == '\0' && info->short_name.empty()) {
StringRef Tag;
switch (RD->getTagKind()) {
case TTK_Struct: Tag = "struct"; break;
case TTK_Interface: Tag = "__interface"; break;
case TTK_Union: Tag = "union"; break;
case TTK_Class: Tag = "class"; break;
case TTK_Enum: Tag = "enum"; break;
}
if (TypedefNameDecl *TD = RD->getTypedefNameForAnonDecl()) {
StringRef Name = TD->getName();
std::string name = ("anon " + Tag + " " + Name).str();
type->def.detailed_name = Intern(name);
type->def.short_name_size = name.size();
} else {
std::string name = ("anon " + Tag).str();
type->def.detailed_name = Intern(name);
type->def.short_name_size = name.size();
}
}
if (is_def)
if (auto *ORD = dyn_cast<RecordDecl>(OrigD))
CollectRecordMembers(*type, ORD);
}
break;
case Decl::ClassTemplateSpecialization:
case Decl::ClassTemplatePartialSpecialization:
type->def.kind = SymbolKind::Class;
if (is_def) {
if (auto *ORD = dyn_cast<RecordDecl>(OrigD))
CollectRecordMembers(*type, ORD);
if (auto *RD = dyn_cast<CXXRecordDecl>(D)) {
Decl *D1 = nullptr;
if (auto *SD = dyn_cast<ClassTemplatePartialSpecializationDecl>(RD))
D1 = SD->getSpecializedTemplate();
else if (auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(RD)) {
llvm::PointerUnion<ClassTemplateDecl *,
ClassTemplatePartialSpecializationDecl *>
Result = SD->getSpecializedTemplateOrPartial();
if (Result.is<ClassTemplateDecl *>())
D1 = Result.get<ClassTemplateDecl *>();
else
D1 = Result.get<ClassTemplatePartialSpecializationDecl *>();
} else
D1 = RD->getInstantiatedFromMemberClass();
if (D1) {
Usr usr1 = GetUsr(D1);
type->def.bases.push_back(usr1);
db->ToType(usr1).derived.push_back(usr);
}
}
}
break;
case Decl::TypeAlias:
case Decl::Typedef:
case Decl::UnresolvedUsingTypename:
if (auto *TD = dyn_cast<TypedefNameDecl>(D)) {
bool specialization = false;
QualType T = TD->getUnderlyingType();
if (const Decl *D1 = GetAdjustedDecl(GetTypeDecl(T, &specialization))) {
Usr usr1 = GetUsr(D1);
IndexType &type1 = db->ToType(usr1);
type->def.alias_of = usr1;
// Not visited template<class T> struct B {typedef A<T> t;};
if (specialization) {
const TypeSourceInfo *TSI = TD->getTypeSourceInfo();
SourceLocation L1 = TSI->getTypeLoc().getBeginLoc();
if (SM.getFileID(L1) == LocFID)
type1.uses.push_back(
{{FromTokenRange(SM, Lang, {L1, L1}), Role::Reference}, lid});
}
}
}
break;
case Decl::CXXMethod:
if (is_def || is_decl) {
if (auto *ND = dyn_cast<NamedDecl>(D)) {
SmallVector<const NamedDecl *, 8> OverDecls;
Ctx->getOverriddenMethods(ND, OverDecls);
for (const auto *ND1 : OverDecls) {
Usr usr1 = GetUsr(ND1);
func->def.bases.push_back(usr1);
db->ToFunc(usr1).derived.push_back(usr);
}
}
}
break;
case Decl::EnumConstant:
if (is_def && strchr(var->def.detailed_name, '=') == nullptr) {
auto *ECD = cast<EnumConstantDecl>(D);
const auto &Val = ECD->getInitVal();
std::string init =
" = " + (Val.isSigned() ? std::to_string(Val.getSExtValue())
: std::to_string(Val.getZExtValue()));
var->def.hover = Intern(var->def.detailed_name + init);
}
break;
default:
break;
}
return true;
}
};
class IndexPPCallbacks : public PPCallbacks {
SourceManager &SM;
IndexParam &param;
std::pair<StringRef, Usr> GetMacro(const Token &Tok) const {
StringRef Name = Tok.getIdentifierInfo()->getName();
SmallString<256> USR("@macro@");
USR += Name;
return {Name, HashUsr(USR)};
}
public:
IndexPPCallbacks(SourceManager &SM, IndexParam &param)
: SM(SM), param(param) {}
void InclusionDirective(SourceLocation HashLoc, const Token &Tok,
StringRef Included, bool IsAngled,
CharSourceRange FilenameRange, const FileEntry *File,
StringRef SearchPath, StringRef RelativePath,
const Module *Imported
#if LLVM_VERSION_MAJOR >= 7
,
SrcMgr::CharacteristicKind FileType
#endif
) override {
if (!File)
return;
llvm::sys::fs::UniqueID UniqueID;
auto spell = FromCharSourceRange(SM, param.Ctx->getLangOpts(),
FilenameRange, &UniqueID);
const FileEntry *FE =
SM.getFileEntryForID(SM.getFileID(FilenameRange.getBegin()));
if (!FE)
return;
if (IndexFile *db = param.ConsumeFile(*FE)) {
std::string path = PathFromFileEntry(*File);
if (path.size())
db->includes.push_back({spell.start.line, Intern(path)});
}
}
void MacroDefined(const Token &Tok, const MacroDirective *MD) override {
llvm::sys::fs::UniqueID UniqueID;
const LangOptions &Lang = param.Ctx->getLangOpts();
SourceLocation L = MD->getLocation();
const FileEntry *FE = SM.getFileEntryForID(SM.getFileID(L));
if (!FE)
return;
if (IndexFile *db = param.ConsumeFile(*FE)) {
auto [Name, usr] = GetMacro(Tok);
IndexVar &var = db->ToVar(usr);
Range range = FromTokenRange(SM, Lang, {L, L}, &UniqueID);
var.def.kind = SymbolKind::Macro;
var.def.parent_kind = SymbolKind::File;
if (var.def.spell)
var.declarations.push_back(*var.def.spell);
const MacroInfo *MI = MD->getMacroInfo();
SourceRange R(MI->getDefinitionLoc(), MI->getDefinitionEndLoc());
Range extent = FromTokenRange(SM, param.Ctx->getLangOpts(), R);
var.def.spell = {Use{{range, Role::Definition}}, extent};
if (var.def.detailed_name[0] == '\0') {
var.def.detailed_name = Intern(Name);
var.def.short_name_size = Name.size();
StringRef Buf = GetSourceInRange(SM, Lang, R);
var.def.hover =
Intern(Buf.count('\n') <= kInitializerMaxLines - 1
? Twine("#define ", GetSourceInRange(SM, Lang, R)).str()
: Twine("#define ", Name).str());
}
}
}
void MacroExpands(const Token &Tok, const MacroDefinition &MD, SourceRange R,
const MacroArgs *Args) override {
llvm::sys::fs::UniqueID UniqueID;
SourceLocation L = SM.getSpellingLoc(R.getBegin());
const FileEntry *FE = SM.getFileEntryForID(SM.getFileID(L));
if (!FE)
return;
if (IndexFile *db = param.ConsumeFile(*FE)) {
IndexVar &var = db->ToVar(GetMacro(Tok).second);
var.uses.push_back(
{{FromTokenRange(SM, param.Ctx->getLangOpts(), {L, L}, &UniqueID),
Role::Dynamic}});
}
}
void MacroUndefined(const Token &Tok, const MacroDefinition &MD,
const MacroDirective *UD) override {
if (UD) {
SourceLocation L = UD->getLocation();
MacroExpands(Tok, MD, {L, L}, nullptr);
}
}
void SourceRangeSkipped(SourceRange Range, SourceLocation EndifLoc) override {
llvm::sys::fs::UniqueID UniqueID;
auto range = FromCharRange(SM, param.Ctx->getLangOpts(), Range, &UniqueID);
if (const FileEntry *FE =
SM.getFileEntryForID(SM.getFileID(Range.getBegin())))
if (IndexFile *db = param.ConsumeFile(*FE))
db->skipped_ranges.push_back(range);
}
};
class IndexFrontendAction : public ASTFrontendAction {
IndexParam &param;
public:
IndexFrontendAction(IndexParam &param) : param(param) {}
std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) override {
Preprocessor &PP = CI.getPreprocessor();
PP.addPPCallbacks(
std::make_unique<IndexPPCallbacks>(PP.getSourceManager(), param));
return std::make_unique<ASTConsumer>();
}
};
} // namespace
const int IndexFile::kMajorVersion = 19;
const int IndexFile::kMinorVersion = 0;
IndexFile::IndexFile(llvm::sys::fs::UniqueID UniqueID, const std::string &path,
const std::string &contents)
: UniqueID(UniqueID), path(path), file_contents(contents) {}
IndexFunc &IndexFile::ToFunc(Usr usr) {
auto [it, inserted] = usr2func.try_emplace(usr);
if (inserted)
it->second.usr = usr;
return it->second;
}
IndexType &IndexFile::ToType(Usr usr) {
auto [it, inserted] = usr2type.try_emplace(usr);
if (inserted)
it->second.usr = usr;
return it->second;
}
IndexVar &IndexFile::ToVar(Usr usr) {
auto [it, inserted] = usr2var.try_emplace(usr);
if (inserted)
it->second.usr = usr;
return it->second;
}
std::string IndexFile::ToString() {
return ccls::Serialize(SerializeFormat::Json, *this);
}
template <typename T> void Uniquify(std::vector<T> &a) {
std::unordered_set<T> seen;
size_t n = 0;
for (size_t i = 0; i < a.size(); i++)
if (seen.insert(a[i]).second)
a[n++] = a[i];
a.resize(n);
}
namespace idx {
void Init() {
multiVersionMatcher = new GroupMatch(g_config->index.multiVersionWhitelist,
g_config->index.multiVersionBlacklist);
}
std::vector<std::unique_ptr<IndexFile>>
Index(CompletionManager *completion, WorkingFiles *wfiles, VFS *vfs,
const std::string &opt_wdir, const std::string &file,
const std::vector<const char *> &args,
const std::vector<std::pair<std::string, std::string>> &remapped, bool &ok) {
ok = true;
auto PCH = std::make_shared<PCHContainerOperations>();
llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS = llvm::vfs::getRealFileSystem();
std::shared_ptr<CompilerInvocation> CI = BuildCompilerInvocation(args, FS);
// e.g. .s
if (!CI)
return {};
ok = false;
// -fparse-all-comments enables documentation in the indexer and in
// code completion.
CI->getLangOpts()->CommentOpts.ParseAllComments =
g_config->index.comments > 1;
CI->getLangOpts()->RetainCommentsFromSystemHeaders = true;
std::string buf = wfiles->GetContent(file);
std::vector<std::unique_ptr<llvm::MemoryBuffer>> Bufs;
if (buf.size()) {
// If there is a completion session, reuse its preamble if exists.
bool done_remap = false;
#if 0
std::shared_ptr<CompletionSession> session =
completion->TryGetSession(file, false, false);
if (session)
if (auto preamble = session->GetPreamble()) {
Bufs.push_back(llvm::MemoryBuffer::getMemBuffer(buf));
auto Bounds = ComputePreambleBounds(*CI->getLangOpts(), Bufs.back().get(), 0);
if (preamble->Preamble.CanReuse(*CI, Bufs.back().get(), Bounds,
FS.get())) {
preamble->Preamble.AddImplicitPreamble(*CI, FS, Bufs.back().get());
done_remap = true;
}
}
#endif
for (auto &[filename, content] : remapped) {
if (filename == file && done_remap)
continue;
Bufs.push_back(llvm::MemoryBuffer::getMemBuffer(content));
CI->getPreprocessorOpts().addRemappedFile(
filename == file ? CI->getFrontendOpts().Inputs[0].getFile()
: StringRef(filename),
Bufs.back().get());
}
}
DiagnosticConsumer DC;
auto Clang = std::make_unique<CompilerInstance>(PCH);
Clang->setInvocation(std::move(CI));
Clang->setVirtualFileSystem(FS);
Clang->createDiagnostics(&DC, false);
Clang->setTarget(TargetInfo::CreateTargetInfo(
Clang->getDiagnostics(), Clang->getInvocation().TargetOpts));
if (!Clang->hasTarget())
return {};
IndexParam param(*vfs);
auto DataConsumer = std::make_shared<IndexDataConsumer>(param);
index::IndexingOptions IndexOpts;
IndexOpts.SystemSymbolFilter =
index::IndexingOptions::SystemSymbolFilterKind::All;
IndexOpts.IndexFunctionLocals = true;
#if LLVM_VERSION_MAJOR >= 7
IndexOpts.IndexImplicitInstantiation = true;
#endif
std::unique_ptr<FrontendAction> Action = createIndexingAction(
DataConsumer, IndexOpts, std::make_unique<IndexFrontendAction>(param));
{
llvm::CrashRecoveryContext CRC;
auto parse = [&]() {
if (!Action->BeginSourceFile(*Clang, Clang->getFrontendOpts().Inputs[0]))
return;
if (!Action->Execute())
return;
Action->EndSourceFile();
ok = true;
};
if (!CRC.RunSafely(parse)) {
LOG_S(ERROR) << "clang crashed for " << file;
return {};
}
}
if (!ok) {
LOG_S(ERROR) << "failed to index " << file;
return {};
}
for (auto &Buf : Bufs)
Buf.release();
std::vector<std::unique_ptr<IndexFile>> result;
for (auto &it : param.UID2File) {
if (!it.second.db)
continue;
std::unique_ptr<IndexFile> &entry = it.second.db;
entry->import_file = file;
entry->args = args;
for (auto &[_, it] : entry->uid2lid_and_path)
entry->lid2path.emplace_back(it.first, std::move(it.second));
entry->uid2lid_and_path.clear();
for (auto &it : entry->usr2func) {
// e.g. declaration + out-of-line definition
Uniquify(it.second.derived);
Uniquify(it.second.uses);
}
for (auto &it : entry->usr2type) {
Uniquify(it.second.derived);
Uniquify(it.second.uses);
// e.g. declaration + out-of-line definition
Uniquify(it.second.def.bases);
Uniquify(it.second.def.funcs);
}
for (auto &it : entry->usr2var)
Uniquify(it.second.uses);
// Update dependencies for the file.
for (auto &[_, file] : param.UID2File) {
const std::string &path = file.path;
if (path == entry->path)
entry->mtime = file.mtime;
else if (path != entry->import_file)
entry->dependencies[llvm::CachedHashStringRef(Intern(path))] =
file.mtime;
}
result.push_back(std::move(entry));
}
return result;
}
} // namespace idx
void Reflect(Reader &vis, SymbolRef &v) {
if (vis.Format() == SerializeFormat::Json) {
std::string t = vis.GetString();
char *s = const_cast<char *>(t.c_str());
v.range = Range::FromString(s);
s = strchr(s, '|');
v.usr = strtoull(s + 1, &s, 10);
v.kind = static_cast<Kind>(strtol(s + 1, &s, 10));
v.role = static_cast<Role>(strtol(s + 1, &s, 10));
} else {
Reflect(vis, v.range);
Reflect(vis, v.usr);
Reflect(vis, v.kind);
Reflect(vis, v.role);
}
}
void Reflect(Writer &vis, SymbolRef &v) {
if (vis.Format() == SerializeFormat::Json) {
char buf[99];
snprintf(buf, sizeof buf, "%s|%" PRIu64 "|%d|%d",
v.range.ToString().c_str(), v.usr, int(v.kind), int(v.role));
std::string s(buf);
Reflect(vis, s);
} else {
Reflect(vis, v.range);
Reflect(vis, v.usr);
Reflect(vis, v.kind);
Reflect(vis, v.role);
}
}
void Reflect(Reader &vis, Use &v) {
if (vis.Format() == SerializeFormat::Json) {
std::string t = vis.GetString();
char *s = const_cast<char *>(t.c_str());
v.range = Range::FromString(s);
s = strchr(s, '|');
v.role = static_cast<Role>(strtol(s + 1, &s, 10));
v.file_id = static_cast<int>(strtol(s + 1, &s, 10));
} else {
Reflect(vis, v.range);
Reflect(vis, v.role);
Reflect(vis, v.file_id);
}
}
void Reflect(Writer &vis, Use &v) {
if (vis.Format() == SerializeFormat::Json) {
char buf[99];
snprintf(buf, sizeof buf, "%s|%d|%d", v.range.ToString().c_str(),
int(v.role), v.file_id);
std::string s(buf);
Reflect(vis, s);
} else {
Reflect(vis, v.range);
Reflect(vis, v.role);
Reflect(vis, v.file_id);
}
}
void Reflect(Reader &vis, DeclRef &v) {
if (vis.Format() == SerializeFormat::Json) {
std::string t = vis.GetString();
char *s = const_cast<char *>(t.c_str());
v.range = Range::FromString(s);
s = strchr(s, '|') + 1;
v.extent = Range::FromString(s);
s = strchr(s, '|');
v.role = static_cast<Role>(strtol(s + 1, &s, 10));
v.file_id = static_cast<int>(strtol(s + 1, &s, 10));
} else {
Reflect(vis, static_cast<Use &>(v));
Reflect(vis, v.extent);
}
}
void Reflect(Writer &vis, DeclRef &v) {
if (vis.Format() == SerializeFormat::Json) {
char buf[99];
snprintf(buf, sizeof buf, "%s|%s|%d|%d", v.range.ToString().c_str(),
v.extent.ToString().c_str(), int(v.role), v.file_id);
std::string s(buf);
Reflect(vis, s);
} else {
Reflect(vis, static_cast<Use &>(v));
Reflect(vis, v.extent);
}
}
} // namespace ccls
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