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llvm-project/clang/AST/StmtDumper.cpp

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//===--- StmtDumper.cpp - Dumping implementation for Stmt ASTs ------------===//
//
// 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 Stmt::dump/Stmt::print methods, which dump out the
// AST in a form that exposes type details and other fields.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/StmtVisitor.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/ExprCXX.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Basic/SourceManager.h"
#include "llvm/Support/Compiler.h"
#include <cstdio>
using namespace clang;
//===----------------------------------------------------------------------===//
// StmtDumper Visitor
//===----------------------------------------------------------------------===//
namespace {
class VISIBILITY_HIDDEN StmtDumper : public StmtVisitor<StmtDumper> {
SourceManager *SM;
FILE *F;
unsigned IndentLevel;
/// MaxDepth - When doing a normal dump (not dumpAll) we only want to dump
/// the first few levels of an AST. This keeps track of how many ast levels
/// are left.
unsigned MaxDepth;
/// LastLocFilename/LastLocLine - Keep track of the last location we print
/// out so that we can print out deltas from then on out.
const char *LastLocFilename;
unsigned LastLocLine;
public:
StmtDumper(SourceManager *sm, FILE *f, unsigned maxDepth)
: SM(sm), F(f), IndentLevel(0-1), MaxDepth(maxDepth) {
LastLocFilename = "";
LastLocLine = ~0U;
}
void DumpSubTree(Stmt *S) {
// Prune the recursion if not using dump all.
if (MaxDepth == 0) return;
++IndentLevel;
if (S) {
if (DeclStmt* DS = dyn_cast<DeclStmt>(S))
VisitDeclStmt(DS);
else {
Visit(S);
// Print out children.
Stmt::child_iterator CI = S->child_begin(), CE = S->child_end();
if (CI != CE) {
while (CI != CE) {
fprintf(F, "\n");
DumpSubTree(*CI++);
}
}
fprintf(F, ")");
}
} else {
Indent();
fprintf(F, "<<<NULL>>>");
}
--IndentLevel;
}
void DumpDeclarator(Decl *D);
void Indent() const {
for (int i = 0, e = IndentLevel; i < e; ++i)
fprintf(F, " ");
}
void DumpType(QualType T) {
fprintf(F, "'%s'", T.getAsString().c_str());
// If the type is directly a typedef, strip off typedefness to give at
// least one level of concreteness.
if (TypedefType *TDT = dyn_cast<TypedefType>(T))
fprintf(F, ":'%s'", TDT->LookThroughTypedefs().getAsString().c_str());
}
void DumpStmt(const Stmt *Node) {
Indent();
fprintf(F, "(%s %p", Node->getStmtClassName(), (void*)Node);
DumpSourceRange(Node);
}
void DumpExpr(const Expr *Node) {
DumpStmt(Node);
fprintf(F, " ");
DumpType(Node->getType());
}
void DumpSourceRange(const Stmt *Node);
void DumpLocation(SourceLocation Loc);
// Stmts.
void VisitStmt(Stmt *Node);
void VisitDeclStmt(DeclStmt *Node);
void VisitLabelStmt(LabelStmt *Node);
void VisitGotoStmt(GotoStmt *Node);
// Exprs
void VisitExpr(Expr *Node);
void VisitDeclRefExpr(DeclRefExpr *Node);
void VisitPreDefinedExpr(PreDefinedExpr *Node);
void VisitCharacterLiteral(CharacterLiteral *Node);
void VisitIntegerLiteral(IntegerLiteral *Node);
void VisitFloatingLiteral(FloatingLiteral *Node);
void VisitStringLiteral(StringLiteral *Str);
void VisitUnaryOperator(UnaryOperator *Node);
void VisitSizeOfAlignOfTypeExpr(SizeOfAlignOfTypeExpr *Node);
void VisitMemberExpr(MemberExpr *Node);
void VisitOCUVectorElementExpr(OCUVectorElementExpr *Node);
void VisitBinaryOperator(BinaryOperator *Node);
void VisitCompoundAssignOperator(CompoundAssignOperator *Node);
void VisitAddrLabelExpr(AddrLabelExpr *Node);
void VisitTypesCompatibleExpr(TypesCompatibleExpr *Node);
// C++
void VisitCXXCastExpr(CXXCastExpr *Node);
void VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *Node);
// ObjC
void VisitObjCEncodeExpr(ObjCEncodeExpr *Node);
void VisitObjCMessageExpr(ObjCMessageExpr* Node);
void VisitObjCSelectorExpr(ObjCSelectorExpr *Node);
void VisitObjCProtocolExpr(ObjCProtocolExpr *Node);
};
}
//===----------------------------------------------------------------------===//
// Utilities
//===----------------------------------------------------------------------===//
void StmtDumper::DumpLocation(SourceLocation Loc) {
SourceLocation PhysLoc = SM->getPhysicalLoc(Loc);
// The general format we print out is filename:line:col, but we drop pieces
// that haven't changed since the last loc printed.
const char *Filename = SM->getSourceName(PhysLoc);
unsigned LineNo = SM->getLineNumber(PhysLoc);
if (strcmp(Filename, LastLocFilename) != 0) {
fprintf(stderr, "%s:%u:%u", Filename, LineNo, SM->getColumnNumber(PhysLoc));
LastLocFilename = Filename;
LastLocLine = LineNo;
} else if (LineNo != LastLocLine) {
fprintf(stderr, "line:%u:%u", LineNo, SM->getColumnNumber(PhysLoc));
LastLocLine = LineNo;
} else {
fprintf(stderr, "col:%u", SM->getColumnNumber(PhysLoc));
}
}
void StmtDumper::DumpSourceRange(const Stmt *Node) {
// Can't translate locations if a SourceManager isn't available.
if (SM == 0) return;
// TODO: If the parent expression is available, we can print a delta vs its
// location.
SourceRange R = Node->getSourceRange();
fprintf(stderr, " <");
DumpLocation(R.getBegin());
if (R.getBegin() != R.getEnd()) {
fprintf(stderr, ", ");
DumpLocation(R.getEnd());
}
fprintf(stderr, ">");
// <t2.c:123:421[blah], t2.c:412:321>
}
//===----------------------------------------------------------------------===//
// Stmt printing methods.
//===----------------------------------------------------------------------===//
void StmtDumper::VisitStmt(Stmt *Node) {
DumpStmt(Node);
}
void StmtDumper::DumpDeclarator(Decl *D) {
// FIXME: Need to complete/beautify this... this code simply shows the
// nodes are where they need to be.
if (TypedefDecl *localType = dyn_cast<TypedefDecl>(D)) {
fprintf(F, "\"typedef %s %s\"",
localType->getUnderlyingType().getAsString().c_str(),
localType->getName());
} else if (ValueDecl *VD = dyn_cast<ValueDecl>(D)) {
fprintf(F, "\"");
// Emit storage class for vardecls.
if (VarDecl *V = dyn_cast<VarDecl>(VD)) {
switch (V->getStorageClass()) {
default: assert(0 && "Unknown storage class!");
case VarDecl::None: break;
case VarDecl::Extern: fprintf(F, "extern "); break;
case VarDecl::Static: fprintf(F, "static "); break;
case VarDecl::Auto: fprintf(F, "auto "); break;
case VarDecl::Register: fprintf(F, "register "); break;
}
}
std::string Name = VD->getName();
VD->getType().getAsStringInternal(Name);
fprintf(F, "%s", Name.c_str());
// If this is a vardecl with an initializer, emit it.
if (VarDecl *V = dyn_cast<VarDecl>(VD)) {
if (V->getInit()) {
fprintf(F, " =\n");
DumpSubTree(V->getInit());
}
}
fprintf(F, "\"");
} else if (TagDecl *TD = dyn_cast<TagDecl>(D)) {
// print a free standing tag decl (e.g. "struct x;").
const char *tagname;
if (const IdentifierInfo *II = TD->getIdentifier())
tagname = II->getName();
else
tagname = "<anonymous>";
fprintf(F, "\"%s %s;\"", TD->getKindName(), tagname);
// FIXME: print tag bodies.
} else {
assert(0 && "Unexpected decl");
}
}
void StmtDumper::VisitDeclStmt(DeclStmt *Node) {
DumpStmt(Node);
fprintf(F,"\n");
for (ScopedDecl *D = Node->getDecl(); D; D = D->getNextDeclarator()) {
++IndentLevel;
Indent();
fprintf(F, "%p ", (void*) D);
DumpDeclarator(D);
if (D->getNextDeclarator())
fprintf(F,"\n");
--IndentLevel;
}
}
void StmtDumper::VisitLabelStmt(LabelStmt *Node) {
DumpStmt(Node);
fprintf(F, " '%s'\n", Node->getName());
}
void StmtDumper::VisitGotoStmt(GotoStmt *Node) {
DumpStmt(Node);
fprintf(F, " '%s':%p", Node->getLabel()->getName(), (void*)Node->getLabel());
}
//===----------------------------------------------------------------------===//
// Expr printing methods.
//===----------------------------------------------------------------------===//
void StmtDumper::VisitExpr(Expr *Node) {
DumpExpr(Node);
}
void StmtDumper::VisitDeclRefExpr(DeclRefExpr *Node) {
DumpExpr(Node);
fprintf(F, " ");
switch (Node->getDecl()->getKind()) {
case Decl::Function: fprintf(F,"FunctionDecl"); break;
case Decl::BlockVar: fprintf(F,"BlockVar"); break;
case Decl::FileVar: fprintf(F,"FileVar"); break;
case Decl::ParmVar: fprintf(F,"ParmVar"); break;
case Decl::EnumConstant: fprintf(F,"EnumConstant"); break;
case Decl::Typedef: fprintf(F,"Typedef"); break;
case Decl::Struct: fprintf(F,"Struct"); break;
case Decl::Union: fprintf(F,"Union"); break;
case Decl::Class: fprintf(F,"Class"); break;
case Decl::Enum: fprintf(F,"Enum"); break;
case Decl::ObjCInterface: fprintf(F,"ObjCInterface"); break;
case Decl::ObjCClass: fprintf(F,"ObjCClass"); break;
default: fprintf(F,"Decl"); break;
}
fprintf(F, "='%s' %p", Node->getDecl()->getName(), (void*)Node->getDecl());
}
void StmtDumper::VisitPreDefinedExpr(PreDefinedExpr *Node) {
DumpExpr(Node);
switch (Node->getIdentType()) {
default:
assert(0 && "unknown case");
case PreDefinedExpr::Func:
fprintf(F, " __func__");
break;
case PreDefinedExpr::Function:
fprintf(F, " __FUNCTION__");
break;
case PreDefinedExpr::PrettyFunction:
fprintf(F, " __PRETTY_FUNCTION__");
break;
}
}
void StmtDumper::VisitCharacterLiteral(CharacterLiteral *Node) {
DumpExpr(Node);
fprintf(F, " %d", Node->getValue());
}
void StmtDumper::VisitIntegerLiteral(IntegerLiteral *Node) {
DumpExpr(Node);
bool isSigned = Node->getType()->isSignedIntegerType();
fprintf(F, " %s", Node->getValue().toString(10, isSigned).c_str());
}
void StmtDumper::VisitFloatingLiteral(FloatingLiteral *Node) {
DumpExpr(Node);
fprintf(F, " %f", Node->getValueAsDouble());
}
void StmtDumper::VisitStringLiteral(StringLiteral *Str) {
DumpExpr(Str);
// FIXME: this doesn't print wstrings right.
fprintf(F, " %s\"", Str->isWide() ? "L" : "");
for (unsigned i = 0, e = Str->getByteLength(); i != e; ++i) {
switch (char C = Str->getStrData()[i]) {
default:
if (isprint(C))
fputc(C, F);
else
fprintf(F, "\\%03o", C);
break;
// Handle some common ones to make dumps prettier.
case '\\': fprintf(F, "\\\\"); break;
case '"': fprintf(F, "\\\""); break;
case '\n': fprintf(F, "\\n"); break;
case '\t': fprintf(F, "\\t"); break;
case '\a': fprintf(F, "\\a"); break;
case '\b': fprintf(F, "\\b"); break;
}
}
fprintf(F, "\"");
}
void StmtDumper::VisitUnaryOperator(UnaryOperator *Node) {
DumpExpr(Node);
fprintf(F, " %s '%s'", Node->isPostfix() ? "postfix" : "prefix",
UnaryOperator::getOpcodeStr(Node->getOpcode()));
}
void StmtDumper::VisitSizeOfAlignOfTypeExpr(SizeOfAlignOfTypeExpr *Node) {
DumpExpr(Node);
fprintf(F, " %s ", Node->isSizeOf() ? "sizeof" : "alignof");
DumpType(Node->getArgumentType());
}
void StmtDumper::VisitMemberExpr(MemberExpr *Node) {
DumpExpr(Node);
fprintf(F, " %s%s %p", Node->isArrow() ? "->" : ".",
Node->getMemberDecl()->getName(), (void*)Node->getMemberDecl());
}
void StmtDumper::VisitOCUVectorElementExpr(OCUVectorElementExpr *Node) {
DumpExpr(Node);
fprintf(F, " %s", Node->getAccessor().getName());
}
void StmtDumper::VisitBinaryOperator(BinaryOperator *Node) {
DumpExpr(Node);
fprintf(F, " '%s'", BinaryOperator::getOpcodeStr(Node->getOpcode()));
}
void StmtDumper::VisitCompoundAssignOperator(CompoundAssignOperator *Node) {
DumpExpr(Node);
fprintf(F, " '%s' ComputeTy=",
BinaryOperator::getOpcodeStr(Node->getOpcode()));
DumpType(Node->getComputationType());
}
// GNU extensions.
void StmtDumper::VisitAddrLabelExpr(AddrLabelExpr *Node) {
DumpExpr(Node);
fprintf(F, " %s %p", Node->getLabel()->getName(), (void*)Node->getLabel());
}
void StmtDumper::VisitTypesCompatibleExpr(TypesCompatibleExpr *Node) {
DumpExpr(Node);
fprintf(F, " ");
DumpType(Node->getArgType1());
fprintf(F, " ");
DumpType(Node->getArgType2());
}
//===----------------------------------------------------------------------===//
// C++ Expressions
//===----------------------------------------------------------------------===//
void StmtDumper::VisitCXXCastExpr(CXXCastExpr *Node) {
DumpExpr(Node);
fprintf(F, " %s", CXXCastExpr::getOpcodeStr(Node->getOpcode()));
}
void StmtDumper::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *Node) {
DumpExpr(Node);
fprintf(F, " %s", Node->getValue() ? "true" : "false");
}
//===----------------------------------------------------------------------===//
// Obj-C Expressions
//===----------------------------------------------------------------------===//
void StmtDumper::VisitObjCMessageExpr(ObjCMessageExpr* Node) {
DumpExpr(Node);
fprintf(F, " selector=%s", Node->getSelector().getName().c_str());
}
void StmtDumper::VisitObjCEncodeExpr(ObjCEncodeExpr *Node) {
DumpExpr(Node);
fprintf(F, " ");
DumpType(Node->getEncodedType());
}
void StmtDumper::VisitObjCSelectorExpr(ObjCSelectorExpr *Node) {
DumpExpr(Node);
fprintf(F, " ");
Selector &selector = Node->getSelector();
fprintf(F, "%s", selector.getName().c_str());
}
void StmtDumper::VisitObjCProtocolExpr(ObjCProtocolExpr *Node) {
DumpExpr(Node);
fprintf(F, " ");
fprintf(F, "%s", Node->getProtocol()->getName());
}
//===----------------------------------------------------------------------===//
// Stmt method implementations
//===----------------------------------------------------------------------===//
/// dump - This does a local dump of the specified AST fragment. It dumps the
/// specified node and a few nodes underneath it, but not the whole subtree.
/// This is useful in a debugger.
void Stmt::dump(SourceManager &SM) const {
StmtDumper P(&SM, stderr, 4);
P.DumpSubTree(const_cast<Stmt*>(this));
fprintf(stderr, "\n");
}
/// dump - This does a local dump of the specified AST fragment. It dumps the
/// specified node and a few nodes underneath it, but not the whole subtree.
/// This is useful in a debugger.
void Stmt::dump() const {
StmtDumper P(0, stderr, 4);
P.DumpSubTree(const_cast<Stmt*>(this));
fprintf(stderr, "\n");
}
/// dumpAll - This does a dump of the specified AST fragment and all subtrees.
void Stmt::dumpAll(SourceManager &SM) const {
StmtDumper P(&SM, stderr, ~0U);
P.DumpSubTree(const_cast<Stmt*>(this));
fprintf(stderr, "\n");
}
/// dumpAll - This does a dump of the specified AST fragment and all subtrees.
void Stmt::dumpAll() const {
StmtDumper P(0, stderr, ~0U);
P.DumpSubTree(const_cast<Stmt*>(this));
fprintf(stderr, "\n");
}
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