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llvm/utils/TableGen/ClangAttrEmitter.cpp
Anders Carlsson 238777eb58 Add a way to emit StringSwitch of clang attribute spellings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116899 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-20 01:21:53 +00:00

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//===- ClangAttrEmitter.cpp - Generate Clang attribute handling =-*- C++ -*--=//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// These tablegen backends emit Clang attribute processing code
//
//===----------------------------------------------------------------------===//
#include "ClangAttrEmitter.h"
#include "Record.h"
#include "llvm/ADT/StringSwitch.h"
#include <algorithm>
#include <cctype>
using namespace llvm;
static const std::vector<StringRef>
getValueAsListOfStrings(Record &R, StringRef FieldName) {
ListInit *List = R.getValueAsListInit(FieldName);
assert (List && "Got a null ListInit");
std::vector<StringRef> Strings;
Strings.reserve(List->getSize());
for (ListInit::iterator i = List->begin(), e = List->end(); i != e; ++i) {
assert(*i && "Got a null element in a ListInit");
if (StringInit *S = dynamic_cast<StringInit *>(*i))
Strings.push_back(S->getValue());
else if (CodeInit *C = dynamic_cast<CodeInit *>(*i))
Strings.push_back(C->getValue());
else
assert(false && "Got a non-string, non-code element in a ListInit");
}
return Strings;
}
std::string ReadPCHRecord(StringRef type) {
return StringSwitch<std::string>(type)
.EndsWith("Decl *", "cast_or_null<" + std::string(type, 0, type.size()-1) +
">(GetDecl(Record[Idx++]))")
.Case("QualType", "GetType(Record[Idx++])")
.Default("Record[Idx++]");
}
// Assumes that the way to get the value is SA->getname()
std::string WritePCHRecord(StringRef type, StringRef name) {
return StringSwitch<std::string>(type)
.EndsWith("Decl *", "AddDeclRef(" + std::string(name) +
", Record);\n")
.Case("QualType", "AddTypeRef(" + std::string(name) + ", Record);\n")
.Default("Record.push_back(" + std::string(name) + ");\n");
}
namespace {
class Argument {
std::string lowerName, upperName;
StringRef attrName;
public:
Argument(Record &Arg, StringRef Attr)
: lowerName(Arg.getValueAsString("Name")), upperName(lowerName),
attrName(Attr) {
if (!lowerName.empty()) {
lowerName[0] = std::tolower(lowerName[0]);
upperName[0] = std::toupper(upperName[0]);
}
}
virtual ~Argument() {}
StringRef getLowerName() const { return lowerName; }
StringRef getUpperName() const { return upperName; }
StringRef getAttrName() const { return attrName; }
// These functions print the argument contents formatted in different ways.
virtual void writeAccessors(raw_ostream &OS) const = 0;
virtual void writeAccessorDefinitions(raw_ostream &OS) const {}
virtual void writeCloneArgs(raw_ostream &OS) const = 0;
virtual void writeCtorBody(raw_ostream &OS) const {}
virtual void writeCtorInitializers(raw_ostream &OS) const = 0;
virtual void writeCtorParameters(raw_ostream &OS) const = 0;
virtual void writeDeclarations(raw_ostream &OS) const = 0;
virtual void writePCHReadArgs(raw_ostream &OS) const = 0;
virtual void writePCHReadDecls(raw_ostream &OS) const = 0;
virtual void writePCHWrite(raw_ostream &OS) const = 0;
};
class SimpleArgument : public Argument {
std::string type;
public:
SimpleArgument(Record &Arg, StringRef Attr, std::string T)
: Argument(Arg, Attr), type(T)
{}
void writeAccessors(raw_ostream &OS) const {
OS << " " << type << " get" << getUpperName() << "() const {\n";
OS << " return " << getLowerName() << ";\n";
OS << " }";
}
void writeCloneArgs(raw_ostream &OS) const {
OS << getLowerName();
}
void writeCtorInitializers(raw_ostream &OS) const {
OS << getLowerName() << "(" << getUpperName() << ")";
}
void writeCtorParameters(raw_ostream &OS) const {
OS << type << " " << getUpperName();
}
void writeDeclarations(raw_ostream &OS) const {
OS << type << " " << getLowerName() << ";";
}
void writePCHReadDecls(raw_ostream &OS) const {
std::string read = ReadPCHRecord(type);
OS << " " << type << " " << getLowerName() << " = " << read << ";\n";
}
void writePCHReadArgs(raw_ostream &OS) const {
OS << getLowerName();
}
void writePCHWrite(raw_ostream &OS) const {
OS << " " << WritePCHRecord(type, "SA->get" +
std::string(getUpperName()) + "()");
}
};
class StringArgument : public Argument {
public:
StringArgument(Record &Arg, StringRef Attr)
: Argument(Arg, Attr)
{}
void writeAccessors(raw_ostream &OS) const {
OS << " llvm::StringRef get" << getUpperName() << "() const {\n";
OS << " return llvm::StringRef(" << getLowerName() << ", "
<< getLowerName() << "Length);\n";
OS << " }\n";
OS << " unsigned get" << getUpperName() << "Length() const {\n";
OS << " return " << getLowerName() << "Length;\n";
OS << " }\n";
OS << " void set" << getUpperName()
<< "(ASTContext &C, llvm::StringRef S) {\n";
OS << " " << getLowerName() << "Length = S.size();\n";
OS << " this->" << getLowerName() << " = new (C, 1) char ["
<< getLowerName() << "Length];\n";
OS << " std::memcpy(this->" << getLowerName() << ", S.data(), "
<< getLowerName() << "Length);\n";
OS << " }";
}
void writeCloneArgs(raw_ostream &OS) const {
OS << "get" << getUpperName() << "()";
}
void writeCtorBody(raw_ostream &OS) const {
OS << " std::memcpy(" << getLowerName() << ", " << getUpperName()
<< ".data(), " << getLowerName() << "Length);";
}
void writeCtorInitializers(raw_ostream &OS) const {
OS << getLowerName() << "Length(" << getUpperName() << ".size()),"
<< getLowerName() << "(new (Ctx, 1) char[" << getLowerName()
<< "Length])";
}
void writeCtorParameters(raw_ostream &OS) const {
OS << "llvm::StringRef " << getUpperName();
}
void writeDeclarations(raw_ostream &OS) const {
OS << "unsigned " << getLowerName() << "Length;\n";
OS << "char *" << getLowerName() << ";";
}
void writePCHReadDecls(raw_ostream &OS) const {
OS << " std::string " << getLowerName()
<< "= ReadString(Record, Idx);\n";
}
void writePCHReadArgs(raw_ostream &OS) const {
OS << getLowerName();
}
void writePCHWrite(raw_ostream &OS) const {
OS << " AddString(SA->get" << getUpperName() << "(), Record);\n";
}
};
class AlignedArgument : public Argument {
public:
AlignedArgument(Record &Arg, StringRef Attr)
: Argument(Arg, Attr)
{}
void writeAccessors(raw_ostream &OS) const {
OS << " bool is" << getUpperName() << "Dependent() const;\n";
OS << " unsigned get" << getUpperName() << "(ASTContext &Ctx) const;\n";
OS << " bool is" << getUpperName() << "Expr() const {\n";
OS << " return is" << getLowerName() << "Expr;\n";
OS << " }\n";
OS << " Expr *get" << getUpperName() << "Expr() const {\n";
OS << " assert(is" << getLowerName() << "Expr);\n";
OS << " return " << getLowerName() << "Expr;\n";
OS << " }\n";
OS << " TypeSourceInfo *get" << getUpperName() << "Type() const {\n";
OS << " assert(!is" << getLowerName() << "Expr);\n";
OS << " return " << getLowerName() << "Type;\n";
OS << " }";
}
void writeAccessorDefinitions(raw_ostream &OS) const {
OS << "bool " << getAttrName() << "Attr::is" << getUpperName()
<< "Dependent() const {\n";
OS << " if (is" << getLowerName() << "Expr)\n";
OS << " return " << getLowerName() << "Expr && (" << getLowerName()
<< "Expr->isValueDependent() || " << getLowerName()
<< "Expr->isTypeDependent());\n";
OS << " else\n";
OS << " return " << getLowerName()
<< "Type->getType()->isDependentType();\n";
OS << "}\n";
// FIXME: Do not do the calculation here
// FIXME: Handle types correctly
// A null pointer means maximum alignment
// FIXME: Load the platform-specific maximum alignment, rather than
// 16, the x86 max.
OS << "unsigned " << getAttrName() << "Attr::get" << getUpperName()
<< "(ASTContext &Ctx) const {\n";
OS << " assert(!is" << getUpperName() << "Dependent());\n";
OS << " if (is" << getLowerName() << "Expr)\n";
OS << " return (" << getLowerName() << "Expr ? " << getLowerName()
<< "Expr->EvaluateAsInt(Ctx).getZExtValue() : 16)"
<< "* Ctx.getCharWidth();\n";
OS << " else\n";
OS << " return 0; // FIXME\n";
OS << "}\n";
}
void writeCloneArgs(raw_ostream &OS) const {
OS << "is" << getLowerName() << "Expr, is" << getLowerName()
<< "Expr ? static_cast<void*>(" << getLowerName()
<< "Expr) : " << getLowerName()
<< "Type";
}
void writeCtorBody(raw_ostream &OS) const {
OS << " if (is" << getLowerName() << "Expr)\n";
OS << " " << getLowerName() << "Expr = reinterpret_cast<Expr *>("
<< getUpperName() << ");\n";
OS << " else\n";
OS << " " << getLowerName()
<< "Type = reinterpret_cast<TypeSourceInfo *>(" << getUpperName()
<< ");";
}
void writeCtorInitializers(raw_ostream &OS) const {
OS << "is" << getLowerName() << "Expr(Is" << getUpperName() << "Expr)";
}
void writeCtorParameters(raw_ostream &OS) const {
OS << "bool Is" << getUpperName() << "Expr, void *" << getUpperName();
}
void writeDeclarations(raw_ostream &OS) const {
OS << "bool is" << getLowerName() << "Expr;\n";
OS << "union {\n";
OS << "Expr *" << getLowerName() << "Expr;\n";
OS << "TypeSourceInfo *" << getLowerName() << "Type;\n";
OS << "};";
}
void writePCHReadArgs(raw_ostream &OS) const {
OS << "is" << getLowerName() << "Expr, " << getLowerName() << "Ptr";
}
void writePCHReadDecls(raw_ostream &OS) const {
OS << " bool is" << getLowerName() << "Expr = Record[Idx++];\n";
OS << " void *" << getLowerName() << "Ptr;\n";
OS << " if (is" << getLowerName() << "Expr)\n";
OS << " " << getLowerName() << "Ptr = ReadExpr(F);\n";
OS << " else\n";
OS << " " << getLowerName()
<< "Ptr = GetTypeSourceInfo(F, Record, Idx);\n";
}
void writePCHWrite(raw_ostream &OS) const {
OS << " Record.push_back(SA->is" << getUpperName() << "Expr());\n";
OS << " if (SA->is" << getUpperName() << "Expr())\n";
OS << " AddStmt(SA->get" << getUpperName() << "Expr());\n";
OS << " else\n";
OS << " AddTypeSourceInfo(SA->get" << getUpperName()
<< "Type(), Record);\n";
}
};
class VariadicArgument : public Argument {
std::string type;
public:
VariadicArgument(Record &Arg, StringRef Attr, std::string T)
: Argument(Arg, Attr), type(T)
{}
std::string getType() const { return type; }
void writeAccessors(raw_ostream &OS) const {
OS << " typedef " << type << "* " << getLowerName() << "_iterator;\n";
OS << " " << getLowerName() << "_iterator " << getLowerName()
<< "_begin() const {\n";
OS << " return " << getLowerName() << ";\n";
OS << " }\n";
OS << " " << getLowerName() << "_iterator " << getLowerName()
<< "_end() const {\n";
OS << " return " << getLowerName() << " + " << getLowerName()
<< "Size;\n";
OS << " }\n";
OS << " unsigned " << getLowerName() << "_size() const {\n"
<< " return " << getLowerName() << "Size;\n;";
OS << " }";
}
void writeCloneArgs(raw_ostream &OS) const {
OS << getLowerName() << ", " << getLowerName() << "Size";
}
void writeCtorBody(raw_ostream &OS) const {
// FIXME: memcpy is not safe on non-trivial types.
OS << " std::memcpy(" << getLowerName() << ", " << getUpperName()
<< ", " << getLowerName() << "Size * sizeof(" << getType() << "));\n";
}
void writeCtorInitializers(raw_ostream &OS) const {
OS << getLowerName() << "Size(" << getUpperName() << "Size), "
<< getLowerName() << "(new (Ctx, 16) " << getType() << "["
<< getLowerName() << "Size])";
}
void writeCtorParameters(raw_ostream &OS) const {
OS << getType() << " *" << getUpperName() << ", unsigned "
<< getUpperName() << "Size";
}
void writeDeclarations(raw_ostream &OS) const {
OS << " unsigned " << getLowerName() << "Size;\n";
OS << " " << getType() << " *" << getLowerName() << ";";
}
void writePCHReadDecls(raw_ostream &OS) const {
OS << " unsigned " << getLowerName() << "Size = Record[Idx++];\n";
OS << " llvm::SmallVector<" << type << ", 4> " << getLowerName()
<< ";\n";
OS << " " << getLowerName() << ".reserve(" << getLowerName()
<< "Size);\n";
OS << " for (unsigned i = " << getLowerName() << "Size; i; --i)\n";
std::string read = ReadPCHRecord(type);
OS << " " << getLowerName() << ".push_back(" << read << ");\n";
}
void writePCHReadArgs(raw_ostream &OS) const {
OS << getLowerName() << ".data(), " << getLowerName() << "Size";
}
void writePCHWrite(raw_ostream &OS) const{
OS << " Record.push_back(SA->" << getLowerName() << "_size());\n";
OS << " for (" << getAttrName() << "Attr::" << getLowerName()
<< "_iterator i = SA->" << getLowerName() << "_begin(), e = SA->"
<< getLowerName() << "_end(); i != e; ++i)\n";
OS << " " << WritePCHRecord(type, "(*i)");
}
};
class EnumArgument : public Argument {
std::string type;
std::vector<StringRef> values, enums;
public:
EnumArgument(Record &Arg, StringRef Attr)
: Argument(Arg, Attr), type(Arg.getValueAsString("Type")),
values(getValueAsListOfStrings(Arg, "Values")),
enums(getValueAsListOfStrings(Arg, "Enums"))
{}
void writeAccessors(raw_ostream &OS) const {
OS << " " << type << " get" << getUpperName() << "() const {\n";
OS << " return " << getLowerName() << ";\n";
OS << " }";
}
void writeCloneArgs(raw_ostream &OS) const {
OS << getLowerName();
}
void writeCtorInitializers(raw_ostream &OS) const {
OS << getLowerName() << "(" << getUpperName() << ")";
}
void writeCtorParameters(raw_ostream &OS) const {
OS << type << " " << getUpperName();
}
void writeDeclarations(raw_ostream &OS) const {
// Calculate the various enum values
std::vector<StringRef> uniques(enums);
std::sort(uniques.begin(), uniques.end());
uniques.erase(std::unique(uniques.begin(), uniques.end()),
uniques.end());
// FIXME: Emit a proper error
assert(!uniques.empty());
std::vector<StringRef>::iterator i = uniques.begin(),
e = uniques.end();
// The last one needs to not have a comma.
--e;
OS << "public:\n";
OS << " enum " << type << " {\n";
for (; i != e; ++i)
OS << " " << *i << ",\n";
OS << " " << *e << "\n";
OS << " };\n";
OS << "private:\n";
OS << " " << type << " " << getLowerName() << ";";
}
void writePCHReadDecls(raw_ostream &OS) const {
OS << " " << getAttrName() << "Attr::" << type << " " << getLowerName()
<< "(static_cast<" << getAttrName() << "Attr::" << type
<< ">(Record[Idx++]));\n";
}
void writePCHReadArgs(raw_ostream &OS) const {
OS << getLowerName();
}
void writePCHWrite(raw_ostream &OS) const {
OS << "Record.push_back(SA->get" << getUpperName() << "());\n";
}
};
}
static Argument *createArgument(Record &Arg, StringRef Attr,
Record *Search = 0) {
if (!Search)
Search = &Arg;
Argument *Ptr = 0;
llvm::StringRef ArgName = Search->getName();
if (ArgName == "AlignedArgument") Ptr = new AlignedArgument(Arg, Attr);
else if (ArgName == "EnumArgument") Ptr = new EnumArgument(Arg, Attr);
else if (ArgName == "ExprArgument") Ptr = new SimpleArgument(Arg, Attr,
"Expr *");
else if (ArgName == "FunctionArgument")
Ptr = new SimpleArgument(Arg, Attr, "FunctionDecl *");
else if (ArgName == "IdentifierArgument")
Ptr = new SimpleArgument(Arg, Attr, "IdentifierInfo *");
else if (ArgName == "IntArgument") Ptr = new SimpleArgument(Arg, Attr, "int");
else if (ArgName == "StringArgument") Ptr = new StringArgument(Arg, Attr);
else if (ArgName == "TypeArgument")
Ptr = new SimpleArgument(Arg, Attr, "QualType");
else if (ArgName == "UnsignedArgument")
Ptr = new SimpleArgument(Arg, Attr, "unsigned");
else if (ArgName == "VariadicUnsignedArgument")
Ptr = new VariadicArgument(Arg, Attr, "unsigned");
if (!Ptr) {
std::vector<Record*> Bases = Search->getSuperClasses();
for (std::vector<Record*>::iterator i = Bases.begin(), e = Bases.end();
i != e; ++i) {
Ptr = createArgument(Arg, Attr, *i);
if (Ptr)
break;
}
}
return Ptr;
}
void ClangAttrClassEmitter::run(raw_ostream &OS) {
OS << "// This file is generated by TableGen. Do not edit.\n\n";
OS << "#ifndef LLVM_CLANG_ATTR_CLASSES_INC\n";
OS << "#define LLVM_CLANG_ATTR_CLASSES_INC\n\n";
std::vector<Record*> Attrs = Records.getAllDerivedDefinitions("Attr");
for (std::vector<Record*>::iterator i = Attrs.begin(), e = Attrs.end();
i != e; ++i) {
Record &R = **i;
OS << "class " << R.getName() << "Attr : public Attr {\n";
std::vector<Record*> ArgRecords = R.getValueAsListOfDefs("Args");
std::vector<Argument*> Args;
std::vector<Argument*>::iterator ai, ae;
Args.reserve(ArgRecords.size());
for (std::vector<Record*>::iterator ri = ArgRecords.begin(),
re = ArgRecords.end();
ri != re; ++ri) {
Record &ArgRecord = **ri;
Argument *Arg = createArgument(ArgRecord, R.getName());
assert(Arg);
Args.push_back(Arg);
Arg->writeDeclarations(OS);
OS << "\n\n";
}
ae = Args.end();
OS << "\n public:\n";
OS << " " << R.getName() << "Attr(SourceLocation L, ASTContext &Ctx\n";
for (ai = Args.begin(); ai != ae; ++ai) {
OS << " , ";
(*ai)->writeCtorParameters(OS);
OS << "\n";
}
OS << " )\n";
OS << " : Attr(attr::" << R.getName() << ", L)\n";
for (ai = Args.begin(); ai != ae; ++ai) {
OS << " , ";
(*ai)->writeCtorInitializers(OS);
OS << "\n";
}
OS << " {\n";
for (ai = Args.begin(); ai != ae; ++ai) {
(*ai)->writeCtorBody(OS);
OS << "\n";
}
OS << " }\n\n";
OS << " virtual " << R.getName() << "Attr *clone (ASTContext &C) const;\n";
for (ai = Args.begin(); ai != ae; ++ai) {
(*ai)->writeAccessors(OS);
OS << "\n\n";
}
OS << R.getValueAsCode("AdditionalMembers");
OS << "\n\n";
OS << " static bool classof(const Attr *A) { return A->getKind() == "
<< "attr::" << R.getName() << "; }\n";
OS << " static bool classof(const " << R.getName()
<< "Attr *) { return true; }\n";
OS << "};\n\n";
}
OS << "#endif\n";
}
void ClangAttrImplEmitter::run(raw_ostream &OS) {
OS << "// This file is generated by TableGen. Do not edit.\n\n";
std::vector<Record*> Attrs = Records.getAllDerivedDefinitions("Attr");
std::vector<Record*>::iterator i = Attrs.begin(), e = Attrs.end(), ri, re;
std::vector<Argument*>::iterator ai, ae;
for (; i != e; ++i) {
Record &R = **i;
std::vector<Record*> ArgRecords = R.getValueAsListOfDefs("Args");
std::vector<Argument*> Args;
for (ri = ArgRecords.begin(), re = ArgRecords.end(); ri != re; ++ri)
Args.push_back(createArgument(**ri, R.getName()));
for (ai = Args.begin(), ae = Args.end(); ai != ae; ++ai)
(*ai)->writeAccessorDefinitions(OS);
OS << R.getName() << "Attr *" << R.getName()
<< "Attr::clone(ASTContext &C) const {\n";
OS << " return new (C) " << R.getName() << "Attr(getLocation(), C";
for (ai = Args.begin(); ai != ae; ++ai) {
OS << ", ";
(*ai)->writeCloneArgs(OS);
}
OS << ");\n}\n\n";
}
}
void ClangAttrListEmitter::run(raw_ostream &OS) {
OS << "// This file is generated by TableGen. Do not edit.\n\n";
OS << "#ifndef LAST_ATTR\n";
OS << "#define LAST_ATTR(NAME) ATTR(NAME)\n";
OS << "#endif\n\n";
std::vector<Record*> Attrs = Records.getAllDerivedDefinitions("Attr");
std::vector<Record*>::iterator i = Attrs.begin(), e = Attrs.end();
if (i != e) {
// Move the end iterator back to emit the last attribute.
for(--e; i != e; ++i)
OS << "ATTR(" << (*i)->getName() << ")\n";
OS << "LAST_ATTR(" << (*i)->getName() << ")\n\n";
}
OS << "#undef LAST_ATTR\n";
OS << "#undef ATTR\n";
}
void ClangAttrPCHReadEmitter::run(raw_ostream &OS) {
OS << "// This file is generated by TableGen. Do not edit.\n\n";
std::vector<Record*> Attrs = Records.getAllDerivedDefinitions("Attr"),
ArgRecords;
std::vector<Record*>::iterator i = Attrs.begin(), e = Attrs.end(), ai, ae;
std::vector<Argument*> Args;
std::vector<Argument*>::iterator ri, re;
OS << " switch (Kind) {\n";
OS << " default:\n";
OS << " assert(0 && \"Unknown attribute!\");\n";
OS << " break;\n";
for (; i != e; ++i) {
Record &R = **i;
OS << " case attr::" << R.getName() << ": {\n";
ArgRecords = R.getValueAsListOfDefs("Args");
Args.clear();
for (ai = ArgRecords.begin(), ae = ArgRecords.end(); ai != ae; ++ai) {
Argument *A = createArgument(**ai, R.getName());
Args.push_back(A);
A->writePCHReadDecls(OS);
}
OS << " New = new (*Context) " << R.getName() << "Attr(Loc, *Context";
for (ri = Args.begin(), re = Args.end(); ri != re; ++ri) {
OS << ", ";
(*ri)->writePCHReadArgs(OS);
}
OS << ");\n";
OS << " break;\n";
OS << " }\n";
}
OS << " }\n";
}
void ClangAttrPCHWriteEmitter::run(raw_ostream &OS) {
std::vector<Record*> Attrs = Records.getAllDerivedDefinitions("Attr"), Args;
std::vector<Record*>::iterator i = Attrs.begin(), e = Attrs.end(), ai, ae;
OS << " switch (A->getKind()) {\n";
OS << " default:\n";
OS << " llvm_unreachable(\"Unknown attribute kind!\");\n";
OS << " break;\n";
for (; i != e; ++i) {
Record &R = **i;
OS << " case attr::" << R.getName() << ": {\n";
Args = R.getValueAsListOfDefs("Args");
if (!Args.empty())
OS << " const " << R.getName() << "Attr *SA = cast<" << R.getName()
<< "Attr>(A);\n";
for (ai = Args.begin(), ae = Args.end(); ai != ae; ++ai)
createArgument(**ai, R.getName())->writePCHWrite(OS);
OS << " break;\n";
OS << " }\n";
}
OS << " }\n";
}
void ClangAttrSpellingListEmitter::run(raw_ostream &OS) {
OS << "// This file is generated by TableGen. Do not edit.\n\n";
std::vector<Record*> Attrs = Records.getAllDerivedDefinitions("Attr");
for (std::vector<Record*>::iterator I = Attrs.begin(), E = Attrs.end(); I != E; ++I) {
Record &Attr = **I;
std::vector<StringRef> Spellings = getValueAsListOfStrings(Attr, "Spellings");
for (std::vector<StringRef>::const_iterator I = Spellings.begin(), E = Spellings.end(); I != E; ++I) {
StringRef Spelling = *I;
OS << ".Case(\"" << Spelling << "\", true)\n";
}
}
}
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