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llvm-project/clang/lib/Frontend/ASTConsumers.cpp

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//===--- ASTConsumers.cpp - ASTConsumer implementations -------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// AST Consumer Implementations.
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/ASTConsumers.h"
#include "clang/AST/AST.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/AST/RecordLayout.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/raw_ostream.h"
using namespace clang;
//===----------------------------------------------------------------------===//
/// ASTPrinter - Pretty-printer and dumper of ASTs
namespace {
class ASTPrinter : public ASTConsumer,
public RecursiveASTVisitor<ASTPrinter> {
typedef RecursiveASTVisitor<ASTPrinter> base;
public:
ASTPrinter(raw_ostream *Out = nullptr, bool Dump = false,
StringRef FilterString = "", bool DumpLookups = false)
: Out(Out ? *Out : llvm::outs()), Dump(Dump),
FilterString(FilterString), DumpLookups(DumpLookups) {}
void HandleTranslationUnit(ASTContext &Context) override {
TranslationUnitDecl *D = Context.getTranslationUnitDecl();
if (FilterString.empty())
return print(D);
TraverseDecl(D);
}
bool shouldWalkTypesOfTypeLocs() const { return false; }
bool TraverseDecl(Decl *D) {
if (D && filterMatches(D)) {
bool ShowColors = Out.has_colors();
if (ShowColors)
Out.changeColor(raw_ostream::BLUE);
Out << (Dump ? "Dumping " : "Printing ") << getName(D) << ":\n";
if (ShowColors)
Out.resetColor();
print(D);
Out << "\n";
// Don't traverse child nodes to avoid output duplication.
return true;
}
return base::TraverseDecl(D);
}
private:
std::string getName(Decl *D) {
if (isa<NamedDecl>(D))
return cast<NamedDecl>(D)->getQualifiedNameAsString();
return "";
}
bool filterMatches(Decl *D) {
return getName(D).find(FilterString) != std::string::npos;
}
void print(Decl *D) {
if (DumpLookups) {
if (DeclContext *DC = dyn_cast<DeclContext>(D))
DC->dumpLookups(Out);
else
Out << "Not a DeclContext\n";
} else if (Dump)
D->dump(Out);
else
D->print(Out, /*Indentation=*/0, /*PrintInstantiation=*/true);
}
raw_ostream &Out;
bool Dump;
std::string FilterString;
bool DumpLookups;
};
class ASTDeclNodeLister : public ASTConsumer,
public RecursiveASTVisitor<ASTDeclNodeLister> {
public:
ASTDeclNodeLister(raw_ostream *Out = nullptr)
: Out(Out ? *Out : llvm::outs()) {}
void HandleTranslationUnit(ASTContext &Context) override {
TraverseDecl(Context.getTranslationUnitDecl());
}
bool shouldWalkTypesOfTypeLocs() const { return false; }
bool VisitNamedDecl(NamedDecl *D) {
D->printQualifiedName(Out);
Out << '\n';
return true;
}
private:
raw_ostream &Out;
};
} // end anonymous namespace
ASTConsumer *clang::CreateASTPrinter(raw_ostream *Out,
StringRef FilterString) {
return new ASTPrinter(Out, /*Dump=*/ false, FilterString);
}
ASTConsumer *clang::CreateASTDumper(StringRef FilterString, bool DumpLookups) {
return new ASTPrinter(nullptr, /*Dump=*/true, FilterString, DumpLookups);
}
ASTConsumer *clang::CreateASTDeclNodeLister() {
return new ASTDeclNodeLister(nullptr);
}
//===----------------------------------------------------------------------===//
/// ASTViewer - AST Visualization
namespace {
class ASTViewer : public ASTConsumer {
ASTContext *Context;
public:
void Initialize(ASTContext &Context) override {
this->Context = &Context;
}
bool HandleTopLevelDecl(DeclGroupRef D) override {
for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I)
HandleTopLevelSingleDecl(*I);
return true;
}
void HandleTopLevelSingleDecl(Decl *D);
};
}
void ASTViewer::HandleTopLevelSingleDecl(Decl *D) {
if (isa<FunctionDecl>(D) || isa<ObjCMethodDecl>(D)) {
D->print(llvm::errs());
if (Stmt *Body = D->getBody()) {
llvm::errs() << '\n';
Body->viewAST();
llvm::errs() << '\n';
}
}
}
ASTConsumer *clang::CreateASTViewer() { return new ASTViewer(); }
//===----------------------------------------------------------------------===//
/// DeclContextPrinter - Decl and DeclContext Visualization
namespace {
class DeclContextPrinter : public ASTConsumer {
raw_ostream& Out;
public:
DeclContextPrinter() : Out(llvm::errs()) {}
void HandleTranslationUnit(ASTContext &C) override {
PrintDeclContext(C.getTranslationUnitDecl(), 4);
}
void PrintDeclContext(const DeclContext* DC, unsigned Indentation);
};
} // end anonymous namespace
void DeclContextPrinter::PrintDeclContext(const DeclContext* DC,
unsigned Indentation) {
// Print DeclContext name.
switch (DC->getDeclKind()) {
case Decl::TranslationUnit:
Out << "[translation unit] " << DC;
break;
case Decl::Namespace: {
Out << "[namespace] ";
const NamespaceDecl* ND = cast<NamespaceDecl>(DC);
Out << *ND;
break;
}
case Decl::Enum: {
const EnumDecl* ED = cast<EnumDecl>(DC);
if (ED->isCompleteDefinition())
Out << "[enum] ";
else
Out << "<enum> ";
Out << *ED;
break;
}
case Decl::Record: {
const RecordDecl* RD = cast<RecordDecl>(DC);
if (RD->isCompleteDefinition())
Out << "[struct] ";
else
Out << "<struct> ";
Out << *RD;
break;
}
case Decl::CXXRecord: {
const CXXRecordDecl* RD = cast<CXXRecordDecl>(DC);
if (RD->isCompleteDefinition())
Out << "[class] ";
else
Out << "<class> ";
Out << *RD << ' ' << DC;
break;
}
case Decl::ObjCMethod:
Out << "[objc method]";
break;
case Decl::ObjCInterface:
Out << "[objc interface]";
break;
case Decl::ObjCCategory:
Out << "[objc category]";
break;
case Decl::ObjCProtocol:
Out << "[objc protocol]";
break;
case Decl::ObjCImplementation:
Out << "[objc implementation]";
break;
case Decl::ObjCCategoryImpl:
Out << "[objc categoryimpl]";
break;
case Decl::LinkageSpec:
Out << "[linkage spec]";
break;
case Decl::Block:
Out << "[block]";
break;
case Decl::Function: {
const FunctionDecl* FD = cast<FunctionDecl>(DC);
if (FD->doesThisDeclarationHaveABody())
Out << "[function] ";
else
Out << "<function> ";
Out << *FD;
// Print the parameters.
Out << "(";
bool PrintComma = false;
for (auto I : FD->params()) {
if (PrintComma)
Out << ", ";
else
PrintComma = true;
Out << *I;
}
Out << ")";
break;
}
case Decl::CXXMethod: {
const CXXMethodDecl* D = cast<CXXMethodDecl>(DC);
if (D->isOutOfLine())
Out << "[c++ method] ";
else if (D->isImplicit())
Out << "(c++ method) ";
else
Out << "<c++ method> ";
Out << *D;
// Print the parameters.
Out << "(";
bool PrintComma = false;
for (FunctionDecl::param_const_iterator I = D->param_begin(),
E = D->param_end(); I != E; ++I) {
if (PrintComma)
Out << ", ";
else
PrintComma = true;
Out << **I;
}
Out << ")";
// Check the semantic DeclContext.
const DeclContext* SemaDC = D->getDeclContext();
const DeclContext* LexicalDC = D->getLexicalDeclContext();
if (SemaDC != LexicalDC)
Out << " [[" << SemaDC << "]]";
break;
}
case Decl::CXXConstructor: {
const CXXConstructorDecl* D = cast<CXXConstructorDecl>(DC);
if (D->isOutOfLine())
Out << "[c++ ctor] ";
else if (D->isImplicit())
Out << "(c++ ctor) ";
else
Out << "<c++ ctor> ";
Out << *D;
// Print the parameters.
Out << "(";
bool PrintComma = false;
for (FunctionDecl::param_const_iterator I = D->param_begin(),
E = D->param_end(); I != E; ++I) {
if (PrintComma)
Out << ", ";
else
PrintComma = true;
Out << **I;
}
Out << ")";
// Check the semantic DC.
const DeclContext* SemaDC = D->getDeclContext();
const DeclContext* LexicalDC = D->getLexicalDeclContext();
if (SemaDC != LexicalDC)
Out << " [[" << SemaDC << "]]";
break;
}
case Decl::CXXDestructor: {
const CXXDestructorDecl* D = cast<CXXDestructorDecl>(DC);
if (D->isOutOfLine())
Out << "[c++ dtor] ";
else if (D->isImplicit())
Out << "(c++ dtor) ";
else
Out << "<c++ dtor> ";
Out << *D;
// Check the semantic DC.
const DeclContext* SemaDC = D->getDeclContext();
const DeclContext* LexicalDC = D->getLexicalDeclContext();
if (SemaDC != LexicalDC)
Out << " [[" << SemaDC << "]]";
break;
}
case Decl::CXXConversion: {
const CXXConversionDecl* D = cast<CXXConversionDecl>(DC);
if (D->isOutOfLine())
Out << "[c++ conversion] ";
else if (D->isImplicit())
Out << "(c++ conversion) ";
else
Out << "<c++ conversion> ";
Out << *D;
// Check the semantic DC.
const DeclContext* SemaDC = D->getDeclContext();
const DeclContext* LexicalDC = D->getLexicalDeclContext();
if (SemaDC != LexicalDC)
Out << " [[" << SemaDC << "]]";
break;
}
default:
llvm_unreachable("a decl that inherits DeclContext isn't handled");
}
Out << "\n";
// Print decls in the DeclContext.
for (auto *I : DC->decls()) {
for (unsigned i = 0; i < Indentation; ++i)
Out << " ";
Decl::Kind DK = I->getKind();
switch (DK) {
case Decl::Namespace:
case Decl::Enum:
case Decl::Record:
case Decl::CXXRecord:
case Decl::ObjCMethod:
case Decl::ObjCInterface:
case Decl::ObjCCategory:
case Decl::ObjCProtocol:
case Decl::ObjCImplementation:
case Decl::ObjCCategoryImpl:
case Decl::LinkageSpec:
case Decl::Block:
case Decl::Function:
case Decl::CXXMethod:
case Decl::CXXConstructor:
case Decl::CXXDestructor:
case Decl::CXXConversion:
{
DeclContext* DC = cast<DeclContext>(I);
PrintDeclContext(DC, Indentation+2);
break;
}
case Decl::IndirectField: {
IndirectFieldDecl* IFD = cast<IndirectFieldDecl>(I);
Out << "<IndirectField> " << *IFD << '\n';
break;
}
case Decl::Label: {
LabelDecl *LD = cast<LabelDecl>(I);
Out << "<Label> " << *LD << '\n';
break;
}
case Decl::Field: {
FieldDecl *FD = cast<FieldDecl>(I);
Out << "<field> " << *FD << '\n';
break;
}
case Decl::Typedef:
case Decl::TypeAlias: {
TypedefNameDecl* TD = cast<TypedefNameDecl>(I);
Out << "<typedef> " << *TD << '\n';
break;
}
case Decl::EnumConstant: {
EnumConstantDecl* ECD = cast<EnumConstantDecl>(I);
Out << "<enum constant> " << *ECD << '\n';
break;
}
case Decl::Var: {
VarDecl* VD = cast<VarDecl>(I);
Out << "<var> " << *VD << '\n';
break;
}
case Decl::ImplicitParam: {
ImplicitParamDecl* IPD = cast<ImplicitParamDecl>(I);
Out << "<implicit parameter> " << *IPD << '\n';
break;
}
case Decl::ParmVar: {
ParmVarDecl* PVD = cast<ParmVarDecl>(I);
Out << "<parameter> " << *PVD << '\n';
break;
}
case Decl::ObjCProperty: {
ObjCPropertyDecl* OPD = cast<ObjCPropertyDecl>(I);
Out << "<objc property> " << *OPD << '\n';
break;
}
case Decl::FunctionTemplate: {
FunctionTemplateDecl* FTD = cast<FunctionTemplateDecl>(I);
Out << "<function template> " << *FTD << '\n';
break;
}
case Decl::FileScopeAsm: {
Out << "<file-scope asm>\n";
break;
}
case Decl::UsingDirective: {
Out << "<using directive>\n";
break;
}
case Decl::NamespaceAlias: {
NamespaceAliasDecl* NAD = cast<NamespaceAliasDecl>(I);
Out << "<namespace alias> " << *NAD << '\n';
break;
}
case Decl::ClassTemplate: {
ClassTemplateDecl *CTD = cast<ClassTemplateDecl>(I);
Out << "<class template> " << *CTD << '\n';
break;
}
case Decl::OMPThreadPrivate: {
Out << "<omp threadprivate> " << '"' << I << "\"\n";
break;
}
default:
Out << "DeclKind: " << DK << '"' << I << "\"\n";
llvm_unreachable("decl unhandled");
}
}
}
ASTConsumer *clang::CreateDeclContextPrinter() {
return new DeclContextPrinter();
}
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