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llvm-project/clang/AST/Decl.cpp

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//===--- Decl.cpp - Declaration AST Node Implementation -------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the Decl class and subclasses.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/Decl.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/Attr.h"
#include "clang/Basic/IdentifierTable.h"
#include "llvm/ADT/DenseMap.h"
using namespace clang;
// temporary statistics gathering
static unsigned nFuncs = 0;
static unsigned nBlockVars = 0;
static unsigned nFileVars = 0;
static unsigned nParmVars = 0;
static unsigned nSUC = 0;
static unsigned nEnumConst = 0;
static unsigned nEnumDecls = 0;
static unsigned nTypedef = 0;
static unsigned nFieldDecls = 0;
static unsigned nInterfaceDecls = 0;
static unsigned nClassDecls = 0;
static unsigned nMethodDecls = 0;
static unsigned nProtocolDecls = 0;
static unsigned nForwardProtocolDecls = 0;
static unsigned nCategoryDecls = 0;
static unsigned nIvarDecls = 0;
static unsigned nObjCImplementationDecls = 0;
static unsigned nObjCCategoryImpl = 0;
static unsigned nObjCCompatibleAlias = 0;
static unsigned nObjCPropertyDecl = 0;
static unsigned nLinkageSpecDecl = 0;
static unsigned nFileScopeAsmDecl = 0;
static bool StatSwitch = false;
// This keeps track of all decl attributes. Since so few decls have attrs, we
// keep them in a hash map instead of wasting space in the Decl class.
typedef llvm::DenseMap<const Decl*, Attr*> DeclAttrMapTy;
static DeclAttrMapTy *DeclAttrs = 0;
const char *Decl::getDeclKindName() const {
switch (DeclKind) {
default: assert(0 && "Unknown decl kind!");
case Typedef:
return "Typedef";
case Function:
return "Function";
case BlockVar:
return "BlockVar";
case FileVar:
return "FileVar";
case ParmVar:
return "ParmVar";
case EnumConstant:
return "EnumConstant";
case ObjCInterface:
return "ObjCInterface";
case ObjCClass:
return "ObjCClass";
case ObjCMethod:
return "ObjCMethod";
case ObjCProtocol:
return "ObjCProtocol";
case ObjCForwardProtocol:
return "ObjCForwardProtocol";
case Struct:
return "Struct";
case Union:
return "Union";
case Class:
return "Class";
case Enum:
return "Enum";
}
}
bool Decl::CollectingStats(bool enable) {
if (enable) StatSwitch = true;
return StatSwitch;
}
void Decl::PrintStats() {
fprintf(stderr, "*** Decl Stats:\n");
fprintf(stderr, " %d decls total.\n",
int(nFuncs+nBlockVars+nFileVars+nParmVars+nFieldDecls+nSUC+
nEnumDecls+nEnumConst+nTypedef+nInterfaceDecls+nClassDecls+
nMethodDecls+nProtocolDecls+nCategoryDecls+nIvarDecls));
fprintf(stderr, " %d function decls, %d each (%d bytes)\n",
nFuncs, (int)sizeof(FunctionDecl), int(nFuncs*sizeof(FunctionDecl)));
fprintf(stderr, " %d block variable decls, %d each (%d bytes)\n",
nBlockVars, (int)sizeof(BlockVarDecl),
int(nBlockVars*sizeof(BlockVarDecl)));
fprintf(stderr, " %d file variable decls, %d each (%d bytes)\n",
nFileVars, (int)sizeof(FileVarDecl),
int(nFileVars*sizeof(FileVarDecl)));
fprintf(stderr, " %d parameter variable decls, %d each (%d bytes)\n",
nParmVars, (int)sizeof(ParmVarDecl),
int(nParmVars*sizeof(ParmVarDecl)));
fprintf(stderr, " %d field decls, %d each (%d bytes)\n",
nFieldDecls, (int)sizeof(FieldDecl),
int(nFieldDecls*sizeof(FieldDecl)));
fprintf(stderr, " %d struct/union/class decls, %d each (%d bytes)\n",
nSUC, (int)sizeof(RecordDecl),
int(nSUC*sizeof(RecordDecl)));
fprintf(stderr, " %d enum decls, %d each (%d bytes)\n",
nEnumDecls, (int)sizeof(EnumDecl),
int(nEnumDecls*sizeof(EnumDecl)));
fprintf(stderr, " %d enum constant decls, %d each (%d bytes)\n",
nEnumConst, (int)sizeof(EnumConstantDecl),
int(nEnumConst*sizeof(EnumConstantDecl)));
fprintf(stderr, " %d typedef decls, %d each (%d bytes)\n",
nTypedef, (int)sizeof(TypedefDecl),int(nTypedef*sizeof(TypedefDecl)));
// Objective-C decls...
fprintf(stderr, " %d interface decls, %d each (%d bytes)\n",
nInterfaceDecls, (int)sizeof(ObjCInterfaceDecl),
int(nInterfaceDecls*sizeof(ObjCInterfaceDecl)));
fprintf(stderr, " %d instance variable decls, %d each (%d bytes)\n",
nIvarDecls, (int)sizeof(ObjCIvarDecl),
int(nIvarDecls*sizeof(ObjCIvarDecl)));
fprintf(stderr, " %d class decls, %d each (%d bytes)\n",
nClassDecls, (int)sizeof(ObjCClassDecl),
int(nClassDecls*sizeof(ObjCClassDecl)));
fprintf(stderr, " %d method decls, %d each (%d bytes)\n",
nMethodDecls, (int)sizeof(ObjCMethodDecl),
int(nMethodDecls*sizeof(ObjCMethodDecl)));
fprintf(stderr, " %d protocol decls, %d each (%d bytes)\n",
nProtocolDecls, (int)sizeof(ObjCProtocolDecl),
int(nProtocolDecls*sizeof(ObjCProtocolDecl)));
fprintf(stderr, " %d forward protocol decls, %d each (%d bytes)\n",
nForwardProtocolDecls, (int)sizeof(ObjCForwardProtocolDecl),
int(nForwardProtocolDecls*sizeof(ObjCForwardProtocolDecl)));
fprintf(stderr, " %d category decls, %d each (%d bytes)\n",
nCategoryDecls, (int)sizeof(ObjCCategoryDecl),
int(nCategoryDecls*sizeof(ObjCCategoryDecl)));
fprintf(stderr, " %d class implementation decls, %d each (%d bytes)\n",
nObjCImplementationDecls, (int)sizeof(ObjCImplementationDecl),
int(nObjCImplementationDecls*sizeof(ObjCImplementationDecl)));
fprintf(stderr, " %d class implementation decls, %d each (%d bytes)\n",
nObjCCategoryImpl, (int)sizeof(ObjCCategoryImplDecl),
int(nObjCCategoryImpl*sizeof(ObjCCategoryImplDecl)));
fprintf(stderr, " %d compatibility alias decls, %d each (%d bytes)\n",
nObjCCompatibleAlias, (int)sizeof(ObjCCompatibleAliasDecl),
int(nObjCCompatibleAlias*sizeof(ObjCCompatibleAliasDecl)));
fprintf(stderr, " %d property decls, %d each (%d bytes)\n",
nObjCPropertyDecl, (int)sizeof(ObjCPropertyDecl),
int(nObjCPropertyDecl*sizeof(ObjCPropertyDecl)));
fprintf(stderr, "Total bytes = %d\n",
int(nFuncs*sizeof(FunctionDecl)+nBlockVars*sizeof(BlockVarDecl)+
nFileVars*sizeof(FileVarDecl)+nParmVars*sizeof(ParmVarDecl)+
nFieldDecls*sizeof(FieldDecl)+nSUC*sizeof(RecordDecl)+
nEnumDecls*sizeof(EnumDecl)+nEnumConst*sizeof(EnumConstantDecl)+
nTypedef*sizeof(TypedefDecl)+
nInterfaceDecls*sizeof(ObjCInterfaceDecl)+
nIvarDecls*sizeof(ObjCIvarDecl)+
nClassDecls*sizeof(ObjCClassDecl)+
nMethodDecls*sizeof(ObjCMethodDecl)+
nProtocolDecls*sizeof(ObjCProtocolDecl)+
nForwardProtocolDecls*sizeof(ObjCForwardProtocolDecl)+
nCategoryDecls*sizeof(ObjCCategoryDecl)+
nObjCImplementationDecls*sizeof(ObjCImplementationDecl)+
nObjCCategoryImpl*sizeof(ObjCCategoryImplDecl)+
nObjCCompatibleAlias*sizeof(ObjCCompatibleAliasDecl)+
nObjCPropertyDecl*sizeof(ObjCPropertyDecl)+
nLinkageSpecDecl*sizeof(LinkageSpecDecl)+
nFileScopeAsmDecl*sizeof(FileScopeAsmDecl)));
}
void Decl::addDeclKind(const Kind k) {
switch (k) {
case Typedef:
nTypedef++;
break;
case Function:
nFuncs++;
break;
case BlockVar:
nBlockVars++;
break;
case FileVar:
nFileVars++;
break;
case ParmVar:
nParmVars++;
break;
case EnumConstant:
nEnumConst++;
break;
case Field:
nFieldDecls++;
break;
case Struct:
case Union:
case Class:
nSUC++;
break;
case Enum:
nEnumDecls++;
break;
case ObjCInterface:
nInterfaceDecls++;
break;
case ObjCClass:
nClassDecls++;
break;
case ObjCMethod:
nMethodDecls++;
break;
case ObjCProtocol:
nProtocolDecls++;
break;
case ObjCForwardProtocol:
nForwardProtocolDecls++;
break;
case ObjCCategory:
nCategoryDecls++;
break;
case ObjCIvar:
nIvarDecls++;
break;
case ObjCImplementation:
nObjCImplementationDecls++;
break;
case ObjCCategoryImpl:
nObjCCategoryImpl++;
break;
case CompatibleAlias:
nObjCCompatibleAlias++;
break;
case PropertyDecl:
nObjCPropertyDecl++;
break;
case LinkageSpec:
nLinkageSpecDecl++;
break;
case FileScopeAsm:
nFileScopeAsmDecl++;
break;
}
}
// Out-of-line virtual method providing a home for Decl.
Decl::~Decl() {
if (!HasAttrs)
return;
DeclAttrMapTy::iterator it = DeclAttrs->find(this);
assert(it != DeclAttrs->end() && "No attrs found but HasAttrs is true!");
delete it->second;
DeclAttrs->erase(it);
if (DeclAttrs->empty()) {
delete DeclAttrs;
DeclAttrs = 0;
}
}
void Decl::addAttr(Attr *newattr)
{
if (!DeclAttrs)
DeclAttrs = new llvm::DenseMap<const Decl*, Attr*>;
Attr *&attr = (*DeclAttrs)[this];
newattr->setNext(attr);
attr = newattr;
HasAttrs = true;
}
const Attr *Decl::getAttrs() const
{
if (!HasAttrs)
return 0;
return (*DeclAttrs)[this];
}
const char *NamedDecl::getName() const {
if (const IdentifierInfo *II = getIdentifier())
return II->getName();
return "";
}
FunctionDecl::~FunctionDecl() {
delete[] ParamInfo;
}
unsigned FunctionDecl::getNumParams() const {
if (isa<FunctionTypeNoProto>(getCanonicalType())) return 0;
return cast<FunctionTypeProto>(getCanonicalType())->getNumArgs();
}
void FunctionDecl::setParams(ParmVarDecl **NewParamInfo, unsigned NumParams) {
assert(ParamInfo == 0 && "Already has param info!");
assert(NumParams == getNumParams() && "Parameter count mismatch!");
// Zero params -> null pointer.
if (NumParams) {
ParamInfo = new ParmVarDecl*[NumParams];
memcpy(ParamInfo, NewParamInfo, sizeof(ParmVarDecl*)*NumParams);
}
}
/// defineBody - When created, RecordDecl's correspond to a forward declared
/// record. This method is used to mark the decl as being defined, with the
/// specified contents.
void RecordDecl::defineBody(FieldDecl **members, unsigned numMembers) {
assert(!isDefinition() && "Cannot redefine record!");
setDefinition(true);
NumMembers = numMembers;
if (numMembers) {
Members = new FieldDecl*[numMembers];
memcpy(Members, members, numMembers*sizeof(Decl*));
}
}
FieldDecl* RecordDecl::getMember(IdentifierInfo *name) {
if (Members == 0 || NumMembers < 0)
return 0;
// linear search. When C++ classes come along, will likely need to revisit.
for (int i = 0; i < NumMembers; ++i) {
if (Members[i]->getIdentifier() == name)
return Members[i];
}
return 0;
}
void ObjCMethodDecl::setMethodParams(ParmVarDecl **NewParamInfo,
unsigned NumParams) {
assert(ParamInfo == 0 && "Already has param info!");
// Zero params -> null pointer.
if (NumParams) {
ParamInfo = new ParmVarDecl*[NumParams];
memcpy(ParamInfo, NewParamInfo, sizeof(ParmVarDecl*)*NumParams);
NumMethodParams = NumParams;
}
}
ObjCMethodDecl::~ObjCMethodDecl() {
delete[] ParamInfo;
}
/// ObjCAddInstanceVariablesToClass - Inserts instance variables
/// into ObjCInterfaceDecl's fields.
///
void ObjCInterfaceDecl::addInstanceVariablesToClass(ObjCIvarDecl **ivars,
unsigned numIvars,
SourceLocation RBrac) {
NumIvars = numIvars;
if (numIvars) {
Ivars = new ObjCIvarDecl*[numIvars];
memcpy(Ivars, ivars, numIvars*sizeof(ObjCIvarDecl*));
}
setLocEnd(RBrac);
}
/// ObjCAddInstanceVariablesToClassImpl - Checks for correctness of Instance
/// Variables (Ivars) relative to what declared in @implementation;s class.
/// Ivars into ObjCImplementationDecl's fields.
///
void ObjCImplementationDecl::ObjCAddInstanceVariablesToClassImpl(
ObjCIvarDecl **ivars, unsigned numIvars) {
NumIvars = numIvars;
if (numIvars) {
Ivars = new ObjCIvarDecl*[numIvars];
memcpy(Ivars, ivars, numIvars*sizeof(ObjCIvarDecl*));
}
}
/// addMethods - Insert instance and methods declarations into
/// ObjCInterfaceDecl's InsMethods and ClsMethods fields.
///
void ObjCInterfaceDecl::addMethods(ObjCMethodDecl **insMethods,
unsigned numInsMembers,
ObjCMethodDecl **clsMethods,
unsigned numClsMembers,
SourceLocation endLoc) {
NumInstanceMethods = numInsMembers;
if (numInsMembers) {
InstanceMethods = new ObjCMethodDecl*[numInsMembers];
memcpy(InstanceMethods, insMethods, numInsMembers*sizeof(ObjCMethodDecl*));
}
NumClassMethods = numClsMembers;
if (numClsMembers) {
ClassMethods = new ObjCMethodDecl*[numClsMembers];
memcpy(ClassMethods, clsMethods, numClsMembers*sizeof(ObjCMethodDecl*));
}
AtEndLoc = endLoc;
}
/// addMethods - Insert instance and methods declarations into
/// ObjCProtocolDecl's ProtoInsMethods and ProtoClsMethods fields.
///
void ObjCProtocolDecl::addMethods(ObjCMethodDecl **insMethods,
unsigned numInsMembers,
ObjCMethodDecl **clsMethods,
unsigned numClsMembers,
SourceLocation endLoc) {
NumInstanceMethods = numInsMembers;
if (numInsMembers) {
InstanceMethods = new ObjCMethodDecl*[numInsMembers];
memcpy(InstanceMethods, insMethods, numInsMembers*sizeof(ObjCMethodDecl*));
}
NumClassMethods = numClsMembers;
if (numClsMembers) {
ClassMethods = new ObjCMethodDecl*[numClsMembers];
memcpy(ClassMethods, clsMethods, numClsMembers*sizeof(ObjCMethodDecl*));
}
AtEndLoc = endLoc;
}
/// addMethods - Insert instance and methods declarations into
/// ObjCCategoryDecl's CatInsMethods and CatClsMethods fields.
///
void ObjCCategoryDecl::addMethods(ObjCMethodDecl **insMethods,
unsigned numInsMembers,
ObjCMethodDecl **clsMethods,
unsigned numClsMembers,
SourceLocation endLoc) {
NumInstanceMethods = numInsMembers;
if (numInsMembers) {
InstanceMethods = new ObjCMethodDecl*[numInsMembers];
memcpy(InstanceMethods, insMethods, numInsMembers*sizeof(ObjCMethodDecl*));
}
NumClassMethods = numClsMembers;
if (numClsMembers) {
ClassMethods = new ObjCMethodDecl*[numClsMembers];
memcpy(ClassMethods, clsMethods, numClsMembers*sizeof(ObjCMethodDecl*));
}
AtEndLoc = endLoc;
}
ObjCIvarDecl *ObjCInterfaceDecl::lookupInstanceVariable(
IdentifierInfo *ID, ObjCInterfaceDecl *&clsDeclared) {
ObjCInterfaceDecl* ClassDecl = this;
while (ClassDecl != NULL) {
for (ivar_iterator I = ClassDecl->ivar_begin(), E = ClassDecl->ivar_end();
I != E; ++I) {
if ((*I)->getIdentifier() == ID) {
clsDeclared = ClassDecl;
return *I;
}
}
ClassDecl = ClassDecl->getSuperClass();
}
return NULL;
}
/// lookupInstanceMethod - This method returns an instance method by looking in
/// the class, its categories, and its super classes (using a linear search).
ObjCMethodDecl *ObjCInterfaceDecl::lookupInstanceMethod(Selector Sel) {
ObjCInterfaceDecl* ClassDecl = this;
ObjCMethodDecl *MethodDecl = 0;
while (ClassDecl != NULL) {
if ((MethodDecl = ClassDecl->getInstanceMethod(Sel)))
return MethodDecl;
// Didn't find one yet - look through protocols.
ObjCProtocolDecl **protocols = ClassDecl->getReferencedProtocols();
int numProtocols = ClassDecl->getNumIntfRefProtocols();
for (int pIdx = 0; pIdx < numProtocols; pIdx++) {
if ((MethodDecl = protocols[pIdx]->getInstanceMethod(Sel)))
return MethodDecl;
}
// Didn't find one yet - now look through categories.
ObjCCategoryDecl *CatDecl = ClassDecl->getCategoryList();
while (CatDecl) {
if ((MethodDecl = CatDecl->getInstanceMethod(Sel)))
return MethodDecl;
CatDecl = CatDecl->getNextClassCategory();
}
ClassDecl = ClassDecl->getSuperClass();
}
return NULL;
}
// lookupClassMethod - This method returns a class method by looking in the
// class, its categories, and its super classes (using a linear search).
ObjCMethodDecl *ObjCInterfaceDecl::lookupClassMethod(Selector Sel) {
ObjCInterfaceDecl* ClassDecl = this;
ObjCMethodDecl *MethodDecl = 0;
while (ClassDecl != NULL) {
if ((MethodDecl = ClassDecl->getClassMethod(Sel)))
return MethodDecl;
// Didn't find one yet - look through protocols.
ObjCProtocolDecl **protocols = ClassDecl->getReferencedProtocols();
int numProtocols = ClassDecl->getNumIntfRefProtocols();
for (int pIdx = 0; pIdx < numProtocols; pIdx++) {
if ((MethodDecl = protocols[pIdx]->getClassMethod(Sel)))
return MethodDecl;
}
// Didn't find one yet - now look through categories.
ObjCCategoryDecl *CatDecl = ClassDecl->getCategoryList();
while (CatDecl) {
if ((MethodDecl = CatDecl->getClassMethod(Sel)))
return MethodDecl;
CatDecl = CatDecl->getNextClassCategory();
}
ClassDecl = ClassDecl->getSuperClass();
}
return NULL;
}
/// lookupInstanceMethod - This method returns an instance method by looking in
/// the class implementation. Unlike interfaces, we don't look outside the
/// implementation.
ObjCMethodDecl *ObjCImplementationDecl::getInstanceMethod(Selector Sel) {
for (instmeth_iterator I = instmeth_begin(), E = instmeth_end(); I != E; ++I)
if ((*I)->getSelector() == Sel)
return *I;
return NULL;
}
/// lookupClassMethod - This method returns a class method by looking in
/// the class implementation. Unlike interfaces, we don't look outside the
/// implementation.
ObjCMethodDecl *ObjCImplementationDecl::getClassMethod(Selector Sel) {
for (classmeth_iterator I = classmeth_begin(), E = classmeth_end();
I != E; ++I)
if ((*I)->getSelector() == Sel)
return *I;
return NULL;
}
// lookupInstanceMethod - This method returns an instance method by looking in
// the class implementation. Unlike interfaces, we don't look outside the
// implementation.
ObjCMethodDecl *ObjCCategoryImplDecl::getInstanceMethod(Selector Sel) {
for (instmeth_iterator I = instmeth_begin(), E = instmeth_end(); I != E; ++I)
if ((*I)->getSelector() == Sel)
return *I;
return NULL;
}
// lookupClassMethod - This method returns an instance method by looking in
// the class implementation. Unlike interfaces, we don't look outside the
// implementation.
ObjCMethodDecl *ObjCCategoryImplDecl::getClassMethod(Selector Sel) {
for (classmeth_iterator I = classmeth_begin(), E = classmeth_end();
I != E; ++I)
if ((*I)->getSelector() == Sel)
return *I;
return NULL;
}
// lookupInstanceMethod - Lookup a instance method in the protocol and protocols
// it inherited.
ObjCMethodDecl *ObjCProtocolDecl::lookupInstanceMethod(Selector Sel) {
ObjCMethodDecl *MethodDecl = NULL;
if ((MethodDecl = getInstanceMethod(Sel)))
return MethodDecl;
if (getNumReferencedProtocols() > 0) {
ObjCProtocolDecl **RefPDecl = getReferencedProtocols();
for (unsigned i = 0; i < getNumReferencedProtocols(); i++) {
if ((MethodDecl = RefPDecl[i]->getInstanceMethod(Sel)))
return MethodDecl;
}
}
return NULL;
}
// lookupInstanceMethod - Lookup a class method in the protocol and protocols
// it inherited.
ObjCMethodDecl *ObjCProtocolDecl::lookupClassMethod(Selector Sel) {
ObjCMethodDecl *MethodDecl = NULL;
if ((MethodDecl = getClassMethod(Sel)))
return MethodDecl;
if (getNumReferencedProtocols() > 0) {
ObjCProtocolDecl **RefPDecl = getReferencedProtocols();
for(unsigned i = 0; i < getNumReferencedProtocols(); i++) {
if ((MethodDecl = RefPDecl[i]->getClassMethod(Sel)))
return MethodDecl;
}
}
return NULL;
}
/// getSynthesizedMethodSize - Compute size of synthesized method name
/// as done be the rewrite.
///
unsigned ObjCMethodDecl::getSynthesizedMethodSize() const {
// syntesized method name is a concatenation of -/+[class-name selector]
// Get length of this name.
unsigned length = 3; // _I_ or _C_
length += strlen(getClassInterface()->getName()) +1; // extra for _
NamedDecl *MethodContext = getMethodContext();
if (ObjCCategoryImplDecl *CID =
dyn_cast<ObjCCategoryImplDecl>(MethodContext))
length += strlen(CID->getName()) +1;
length += getSelector().getName().size(); // selector name
return length;
}
ObjCInterfaceDecl *const ObjCMethodDecl::getClassInterface() const {
if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(MethodContext))
return ID;
if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(MethodContext))
return CD->getClassInterface();
if (ObjCImplementationDecl *IMD =
dyn_cast<ObjCImplementationDecl>(MethodContext))
return IMD->getClassInterface();
if (ObjCCategoryImplDecl *CID =
dyn_cast<ObjCCategoryImplDecl>(MethodContext))
return CID->getClassInterface();
assert(false && "unknown method context");
return 0;
}
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