зеркало из https://github.com/microsoft/clang-1.git
676 строки
18 KiB
C++
676 строки
18 KiB
C++
//===--- StmtPrinter.cpp - Printing implementation for Stmt ASTs ----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Chris Lattner and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Stmt::dumpPretty/Stmt::printPretty methods, which
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// pretty print the AST back out to C code.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/StmtVisitor.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/ExprCXX.h"
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#include "clang/AST/PrettyPrinter.h"
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#include "clang/Basic/IdentifierTable.h"
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#include "llvm/Support/Compiler.h"
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#include <iostream>
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#include <iomanip>
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// StmtPrinter Visitor
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//===----------------------------------------------------------------------===//
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namespace {
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class VISIBILITY_HIDDEN StmtPrinter : public StmtVisitor<StmtPrinter> {
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std::ostream &OS;
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unsigned IndentLevel;
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clang::PrinterHelper* Helper;
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public:
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StmtPrinter(std::ostream &os, PrinterHelper* helper) :
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OS(os), IndentLevel(0), Helper(helper) {}
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void PrintStmt(Stmt *S, int SubIndent = 1) {
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IndentLevel += SubIndent;
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if (S && isa<Expr>(S)) {
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// If this is an expr used in a stmt context, indent and newline it.
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Indent();
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Visit(S);
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OS << ";\n";
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} else if (S) {
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Visit(S);
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} else {
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Indent() << "<<<NULL STATEMENT>>>\n";
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}
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IndentLevel -= SubIndent;
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}
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void PrintRawCompoundStmt(CompoundStmt *S);
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void PrintRawDecl(Decl *D);
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void PrintRawIfStmt(IfStmt *If);
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void PrintExpr(Expr *E) {
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if (E)
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Visit(E);
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else
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OS << "<null expr>";
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}
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std::ostream &Indent(int Delta = 0) const {
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for (int i = 0, e = IndentLevel+Delta; i < e; ++i)
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OS << " ";
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return OS;
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}
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bool PrintOffsetOfDesignator(Expr *E);
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void VisitUnaryOffsetOf(UnaryOperator *Node);
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void Visit(Stmt* S) {
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if (Helper && Helper->handledStmt(S,OS))
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return;
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else StmtVisitor<StmtPrinter>::Visit(S);
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}
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void VisitStmt(Stmt *Node);
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#define STMT(N, CLASS, PARENT) \
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void Visit##CLASS(CLASS *Node);
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#include "clang/AST/StmtNodes.def"
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};
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}
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//===----------------------------------------------------------------------===//
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// Stmt printing methods.
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//===----------------------------------------------------------------------===//
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void StmtPrinter::VisitStmt(Stmt *Node) {
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Indent() << "<<unknown stmt type>>\n";
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}
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/// PrintRawCompoundStmt - Print a compound stmt without indenting the {, and
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/// with no newline after the }.
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void StmtPrinter::PrintRawCompoundStmt(CompoundStmt *Node) {
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OS << "{\n";
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for (CompoundStmt::body_iterator I = Node->body_begin(), E = Node->body_end();
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I != E; ++I)
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PrintStmt(*I);
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Indent() << "}";
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}
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void StmtPrinter::PrintRawDecl(Decl *D) {
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// FIXME: Need to complete/beautify this... this code simply shows the
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// nodes are where they need to be.
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if (TypedefDecl *localType = dyn_cast<TypedefDecl>(D)) {
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OS << "typedef " << localType->getUnderlyingType().getAsString();
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OS << " " << localType->getName();
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} else if (ValueDecl *VD = dyn_cast<ValueDecl>(D)) {
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// Emit storage class for vardecls.
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if (VarDecl *V = dyn_cast<VarDecl>(VD)) {
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switch (V->getStorageClass()) {
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default: assert(0 && "Unknown storage class!");
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case VarDecl::None: break;
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case VarDecl::Extern: OS << "extern "; break;
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case VarDecl::Static: OS << "static "; break;
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case VarDecl::Auto: OS << "auto "; break;
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case VarDecl::Register: OS << "register "; break;
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}
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}
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std::string Name = VD->getName();
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VD->getType().getAsStringInternal(Name);
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OS << Name;
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// If this is a vardecl with an initializer, emit it.
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if (VarDecl *V = dyn_cast<VarDecl>(VD)) {
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if (V->getInit()) {
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OS << " = ";
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PrintExpr(V->getInit());
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}
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}
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} else {
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// FIXME: "struct x;"
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assert(0 && "Unexpected decl");
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}
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}
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void StmtPrinter::VisitNullStmt(NullStmt *Node) {
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Indent() << ";\n";
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}
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void StmtPrinter::VisitDeclStmt(DeclStmt *Node) {
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for (ScopedDecl *D = Node->getDecl(); D; D = D->getNextDeclarator()) {
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Indent();
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PrintRawDecl(D);
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OS << ";\n";
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}
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}
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void StmtPrinter::VisitCompoundStmt(CompoundStmt *Node) {
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Indent();
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PrintRawCompoundStmt(Node);
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OS << "\n";
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}
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void StmtPrinter::VisitCaseStmt(CaseStmt *Node) {
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Indent(-1) << "case ";
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PrintExpr(Node->getLHS());
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if (Node->getRHS()) {
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OS << " ... ";
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PrintExpr(Node->getRHS());
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}
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OS << ":\n";
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PrintStmt(Node->getSubStmt(), 0);
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}
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void StmtPrinter::VisitDefaultStmt(DefaultStmt *Node) {
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Indent(-1) << "default:\n";
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PrintStmt(Node->getSubStmt(), 0);
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}
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void StmtPrinter::VisitLabelStmt(LabelStmt *Node) {
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Indent(-1) << Node->getName() << ":\n";
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PrintStmt(Node->getSubStmt(), 0);
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}
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void StmtPrinter::PrintRawIfStmt(IfStmt *If) {
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OS << "if ";
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PrintExpr(If->getCond());
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if (CompoundStmt *CS = dyn_cast<CompoundStmt>(If->getThen())) {
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OS << ' ';
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PrintRawCompoundStmt(CS);
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OS << (If->getElse() ? ' ' : '\n');
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} else {
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OS << '\n';
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PrintStmt(If->getThen());
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if (If->getElse()) Indent();
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}
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if (Stmt *Else = If->getElse()) {
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OS << "else";
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if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Else)) {
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OS << ' ';
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PrintRawCompoundStmt(CS);
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OS << '\n';
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} else if (IfStmt *ElseIf = dyn_cast<IfStmt>(Else)) {
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OS << ' ';
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PrintRawIfStmt(ElseIf);
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} else {
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OS << '\n';
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PrintStmt(If->getElse());
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}
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}
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}
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void StmtPrinter::VisitIfStmt(IfStmt *If) {
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Indent();
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PrintRawIfStmt(If);
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}
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void StmtPrinter::VisitSwitchStmt(SwitchStmt *Node) {
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Indent() << "switch (";
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PrintExpr(Node->getCond());
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OS << ")";
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// Pretty print compoundstmt bodies (very common).
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if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
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OS << " ";
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PrintRawCompoundStmt(CS);
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OS << "\n";
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} else {
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OS << "\n";
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PrintStmt(Node->getBody());
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}
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}
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void StmtPrinter::VisitSwitchCase(SwitchCase*) {
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assert(0 && "SwitchCase is an abstract class");
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}
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void StmtPrinter::VisitWhileStmt(WhileStmt *Node) {
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Indent() << "while (";
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PrintExpr(Node->getCond());
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OS << ")\n";
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PrintStmt(Node->getBody());
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}
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void StmtPrinter::VisitDoStmt(DoStmt *Node) {
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Indent() << "do ";
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if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
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PrintRawCompoundStmt(CS);
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OS << " ";
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} else {
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OS << "\n";
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PrintStmt(Node->getBody());
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Indent();
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}
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OS << "while ";
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PrintExpr(Node->getCond());
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OS << ";\n";
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}
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void StmtPrinter::VisitForStmt(ForStmt *Node) {
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Indent() << "for (";
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if (Node->getInit()) {
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if (DeclStmt *DS = dyn_cast<DeclStmt>(Node->getInit()))
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PrintRawDecl(DS->getDecl());
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else
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PrintExpr(cast<Expr>(Node->getInit()));
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}
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OS << ";";
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if (Node->getCond()) {
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OS << " ";
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PrintExpr(Node->getCond());
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}
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OS << ";";
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if (Node->getInc()) {
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OS << " ";
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PrintExpr(Node->getInc());
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}
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OS << ") ";
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if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Node->getBody())) {
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PrintRawCompoundStmt(CS);
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OS << "\n";
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} else {
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OS << "\n";
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PrintStmt(Node->getBody());
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}
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}
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void StmtPrinter::VisitGotoStmt(GotoStmt *Node) {
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Indent() << "goto " << Node->getLabel()->getName() << ";\n";
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}
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void StmtPrinter::VisitIndirectGotoStmt(IndirectGotoStmt *Node) {
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Indent() << "goto *";
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PrintExpr(Node->getTarget());
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OS << ";\n";
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}
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void StmtPrinter::VisitContinueStmt(ContinueStmt *Node) {
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Indent() << "continue;\n";
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}
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void StmtPrinter::VisitBreakStmt(BreakStmt *Node) {
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Indent() << "break;\n";
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}
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void StmtPrinter::VisitReturnStmt(ReturnStmt *Node) {
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Indent() << "return";
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if (Node->getRetValue()) {
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OS << " ";
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PrintExpr(Node->getRetValue());
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}
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OS << ";\n";
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}
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//===----------------------------------------------------------------------===//
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// Expr printing methods.
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//===----------------------------------------------------------------------===//
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void StmtPrinter::VisitExpr(Expr *Node) {
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OS << "<<unknown expr type>>";
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}
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void StmtPrinter::VisitDeclRefExpr(DeclRefExpr *Node) {
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OS << Node->getDecl()->getName();
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}
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void StmtPrinter::VisitPreDefinedExpr(PreDefinedExpr *Node) {
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switch (Node->getIdentType()) {
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default:
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assert(0 && "unknown case");
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case PreDefinedExpr::Func:
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OS << "__func__";
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break;
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case PreDefinedExpr::Function:
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OS << "__FUNCTION__";
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break;
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case PreDefinedExpr::PrettyFunction:
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OS << "__PRETTY_FUNCTION__";
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break;
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}
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}
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void StmtPrinter::VisitCharacterLiteral(CharacterLiteral *Node) {
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// FIXME should print an L for wchar_t constants
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unsigned value = Node->getValue();
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switch (value) {
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case '\\':
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OS << "'\\\\'";
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break;
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case '\'':
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OS << "'\\''";
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break;
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case '\a':
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// TODO: K&R: the meaning of '\\a' is different in traditional C
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OS << "'\\a'";
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break;
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case '\b':
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OS << "'\\b'";
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break;
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// Nonstandard escape sequence.
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/*case '\e':
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OS << "'\\e'";
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break;*/
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case '\f':
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OS << "'\\f'";
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break;
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case '\n':
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OS << "'\\n'";
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break;
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case '\r':
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OS << "'\\r'";
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break;
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case '\t':
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OS << "'\\t'";
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break;
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case '\v':
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OS << "'\\v'";
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break;
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default:
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if (isprint(value) && value < 256) {
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OS << "'" << (char)value << "'";
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} else if (value < 256) {
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OS << "'\\x" << std::hex << value << std::dec << "'";
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} else {
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// FIXME what to really do here?
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OS << value;
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}
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}
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}
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void StmtPrinter::VisitIntegerLiteral(IntegerLiteral *Node) {
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bool isSigned = Node->getType()->isSignedIntegerType();
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OS << Node->getValue().toString(10, isSigned);
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// Emit suffixes. Integer literals are always a builtin integer type.
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switch (cast<BuiltinType>(Node->getType().getCanonicalType())->getKind()) {
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default: assert(0 && "Unexpected type for integer literal!");
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case BuiltinType::Int: break; // no suffix.
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case BuiltinType::UInt: OS << 'U'; break;
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case BuiltinType::Long: OS << 'L'; break;
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case BuiltinType::ULong: OS << "UL"; break;
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case BuiltinType::LongLong: OS << "LL"; break;
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case BuiltinType::ULongLong: OS << "ULL"; break;
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}
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}
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void StmtPrinter::VisitFloatingLiteral(FloatingLiteral *Node) {
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// FIXME: print value more precisely.
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OS << Node->getValueAsDouble();
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}
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void StmtPrinter::VisitImaginaryLiteral(ImaginaryLiteral *Node) {
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PrintExpr(Node->getSubExpr());
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OS << "i";
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}
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void StmtPrinter::VisitStringLiteral(StringLiteral *Str) {
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if (Str->isWide()) OS << 'L';
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OS << '"';
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// FIXME: this doesn't print wstrings right.
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for (unsigned i = 0, e = Str->getByteLength(); i != e; ++i) {
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switch (Str->getStrData()[i]) {
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default: OS << Str->getStrData()[i]; break;
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// Handle some common ones to make dumps prettier.
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case '\\': OS << "\\\\"; break;
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case '"': OS << "\\\""; break;
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case '\n': OS << "\\n"; break;
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case '\t': OS << "\\t"; break;
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case '\a': OS << "\\a"; break;
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case '\b': OS << "\\b"; break;
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}
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}
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OS << '"';
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}
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void StmtPrinter::VisitParenExpr(ParenExpr *Node) {
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OS << "(";
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PrintExpr(Node->getSubExpr());
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OS << ")";
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}
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void StmtPrinter::VisitUnaryOperator(UnaryOperator *Node) {
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if (!Node->isPostfix()) {
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OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
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// Print a space if this is an "identifier operator" like sizeof or __real.
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switch (Node->getOpcode()) {
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default: break;
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case UnaryOperator::SizeOf:
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case UnaryOperator::AlignOf:
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case UnaryOperator::Real:
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case UnaryOperator::Imag:
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case UnaryOperator::Extension:
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OS << ' ';
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break;
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}
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}
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PrintExpr(Node->getSubExpr());
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if (Node->isPostfix())
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OS << UnaryOperator::getOpcodeStr(Node->getOpcode());
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}
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bool StmtPrinter::PrintOffsetOfDesignator(Expr *E) {
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if (isa<CompoundLiteralExpr>(E)) {
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// Base case, print the type and comma.
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OS << E->getType().getAsString() << ", ";
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return true;
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} else if (ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E)) {
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PrintOffsetOfDesignator(ASE->getLHS());
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OS << "[";
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PrintExpr(ASE->getRHS());
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OS << "]";
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return false;
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} else {
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MemberExpr *ME = cast<MemberExpr>(E);
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bool IsFirst = PrintOffsetOfDesignator(ME->getBase());
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OS << (IsFirst ? "" : ".") << ME->getMemberDecl()->getName();
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return false;
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}
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}
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void StmtPrinter::VisitUnaryOffsetOf(UnaryOperator *Node) {
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OS << "__builtin_offsetof(";
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PrintOffsetOfDesignator(Node->getSubExpr());
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OS << ")";
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}
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void StmtPrinter::VisitSizeOfAlignOfTypeExpr(SizeOfAlignOfTypeExpr *Node) {
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OS << (Node->isSizeOf() ? "sizeof(" : "__alignof(");
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OS << Node->getArgumentType().getAsString() << ")";
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}
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void StmtPrinter::VisitArraySubscriptExpr(ArraySubscriptExpr *Node) {
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PrintExpr(Node->getLHS());
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OS << "[";
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PrintExpr(Node->getRHS());
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OS << "]";
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}
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void StmtPrinter::VisitCallExpr(CallExpr *Call) {
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PrintExpr(Call->getCallee());
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OS << "(";
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for (unsigned i = 0, e = Call->getNumArgs(); i != e; ++i) {
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if (i) OS << ", ";
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PrintExpr(Call->getArg(i));
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}
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OS << ")";
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}
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void StmtPrinter::VisitMemberExpr(MemberExpr *Node) {
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PrintExpr(Node->getBase());
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OS << (Node->isArrow() ? "->" : ".");
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FieldDecl *Field = Node->getMemberDecl();
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assert(Field && "MemberExpr should alway reference a field!");
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OS << Field->getName();
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}
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void StmtPrinter::VisitOCUVectorElementExpr(OCUVectorElementExpr *Node) {
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PrintExpr(Node->getBase());
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OS << ".";
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OS << Node->getAccessor().getName();
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}
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void StmtPrinter::VisitCastExpr(CastExpr *Node) {
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OS << "(" << Node->getType().getAsString() << ")";
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PrintExpr(Node->getSubExpr());
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}
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void StmtPrinter::VisitCompoundLiteralExpr(CompoundLiteralExpr *Node) {
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OS << "(" << Node->getType().getAsString() << ")";
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PrintExpr(Node->getInitializer());
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}
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void StmtPrinter::VisitImplicitCastExpr(ImplicitCastExpr *Node) {
|
|
// No need to print anything, simply forward to the sub expression.
|
|
PrintExpr(Node->getSubExpr());
|
|
}
|
|
void StmtPrinter::VisitBinaryOperator(BinaryOperator *Node) {
|
|
PrintExpr(Node->getLHS());
|
|
OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
|
|
PrintExpr(Node->getRHS());
|
|
}
|
|
void StmtPrinter::VisitCompoundAssignOperator(CompoundAssignOperator *Node) {
|
|
PrintExpr(Node->getLHS());
|
|
OS << " " << BinaryOperator::getOpcodeStr(Node->getOpcode()) << " ";
|
|
PrintExpr(Node->getRHS());
|
|
}
|
|
void StmtPrinter::VisitConditionalOperator(ConditionalOperator *Node) {
|
|
PrintExpr(Node->getCond());
|
|
OS << " ? ";
|
|
PrintExpr(Node->getLHS());
|
|
OS << " : ";
|
|
PrintExpr(Node->getRHS());
|
|
}
|
|
|
|
// GNU extensions.
|
|
|
|
void StmtPrinter::VisitAddrLabelExpr(AddrLabelExpr *Node) {
|
|
OS << "&&" << Node->getLabel()->getName();
|
|
}
|
|
|
|
void StmtPrinter::VisitStmtExpr(StmtExpr *E) {
|
|
OS << "(";
|
|
PrintRawCompoundStmt(E->getSubStmt());
|
|
OS << ")";
|
|
}
|
|
|
|
void StmtPrinter::VisitTypesCompatibleExpr(TypesCompatibleExpr *Node) {
|
|
OS << "__builtin_types_compatible_p(";
|
|
OS << Node->getArgType1().getAsString() << ",";
|
|
OS << Node->getArgType2().getAsString() << ")";
|
|
}
|
|
|
|
void StmtPrinter::VisitChooseExpr(ChooseExpr *Node) {
|
|
OS << "__builtin_choose_expr(";
|
|
PrintExpr(Node->getCond());
|
|
OS << ", ";
|
|
PrintExpr(Node->getLHS());
|
|
OS << ", ";
|
|
PrintExpr(Node->getRHS());
|
|
OS << ")";
|
|
}
|
|
|
|
void StmtPrinter::VisitInitListExpr(InitListExpr* Node) {
|
|
OS << "{ ";
|
|
for (unsigned i = 0, e = Node->getNumInits(); i != e; ++i) {
|
|
if (i) OS << ", ";
|
|
PrintExpr(Node->getInit(i));
|
|
}
|
|
OS << " }";
|
|
}
|
|
|
|
void StmtPrinter::VisitVAArgExpr(VAArgExpr *Node) {
|
|
OS << "va_arg(";
|
|
PrintExpr(Node->getSubExpr());
|
|
OS << ", ";
|
|
OS << Node->getType().getAsString();
|
|
OS << ")";
|
|
}
|
|
|
|
// C++
|
|
|
|
void StmtPrinter::VisitCXXCastExpr(CXXCastExpr *Node) {
|
|
OS << CXXCastExpr::getOpcodeStr(Node->getOpcode()) << '<';
|
|
OS << Node->getDestType().getAsString() << ">(";
|
|
PrintExpr(Node->getSubExpr());
|
|
OS << ")";
|
|
}
|
|
|
|
void StmtPrinter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *Node) {
|
|
OS << (Node->getValue() ? "true" : "false");
|
|
}
|
|
|
|
// Obj-C
|
|
|
|
void StmtPrinter::VisitObjCStringLiteral(ObjCStringLiteral *Node) {
|
|
OS << "@";
|
|
VisitStringLiteral(Node->getString());
|
|
}
|
|
|
|
void StmtPrinter::VisitObjCEncodeExpr(ObjCEncodeExpr *Node) {
|
|
OS << "@encode(";
|
|
OS << Node->getEncodedType().getAsString() << ")";
|
|
}
|
|
|
|
void StmtPrinter::VisitObjCSelectorExpr(ObjCSelectorExpr *Node) {
|
|
OS << "@selector(";
|
|
Selector &selector = Node->getSelector();
|
|
OS << " " << selector.getName();
|
|
OS << ")";
|
|
}
|
|
|
|
void StmtPrinter::VisitObjCMessageExpr(ObjCMessageExpr *Mess) {
|
|
OS << "[";
|
|
Expr *receiver = Mess->getReceiver();
|
|
if (receiver) PrintExpr(receiver);
|
|
else OS << Mess->getClassName()->getName();
|
|
Selector &selector = Mess->getSelector();
|
|
if (selector.isUnarySelector()) {
|
|
OS << " " << selector.getIdentifierInfoForSlot(0)->getName();
|
|
} else {
|
|
for (unsigned i = 0, e = Mess->getNumArgs(); i != e; ++i) {
|
|
if (selector.getIdentifierInfoForSlot(i))
|
|
OS << selector.getIdentifierInfoForSlot(i)->getName() << ":";
|
|
else
|
|
OS << ":";
|
|
PrintExpr(Mess->getArg(i));
|
|
}
|
|
}
|
|
OS << "]";
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Stmt method implementations
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void Stmt::dumpPretty() const {
|
|
// FIXME: eliminate use of <iostream>
|
|
printPretty(std::cerr);
|
|
}
|
|
|
|
void Stmt::printPretty(std::ostream &OS, PrinterHelper* Helper) const {
|
|
if (this == 0) {
|
|
OS << "<NULL>";
|
|
return;
|
|
}
|
|
|
|
StmtPrinter P(OS, Helper);
|
|
P.Visit(const_cast<Stmt*>(this));
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// PrinterHelper
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// Implement virtual destructor.
|
|
PrinterHelper::~PrinterHelper() {}
|