/// InitializePreprocessor - Initialize the preprocessor getting it and the
/// environment ready to process a single file. This returns true on error.
///
void clang::InitializePreprocessor(Preprocessor &PP,
const PreprocessorOptions &InitOpts,
const HeaderSearchOptions &HSOpts) {
std::vector<char> PredefineBuffer;
InitializeFileRemapping(PP.getDiagnostics(), PP.getSourceManager(),
PP.getFileManager(), InitOpts);
const char *LineDirective = "# 1 \"<built-in>\" 3\n";
PredefineBuffer.insert(PredefineBuffer.end(),
LineDirective, LineDirective+strlen(LineDirective));
// Install things like __POWERPC__, __GNUC__, etc into the macro table.
if (InitOpts.UsePredefines)
InitializePredefinedMacros(PP.getTargetInfo(), PP.getLangOptions(),
PredefineBuffer);
// Add on the predefines from the driver. Wrap in a #line directive to report
// that they come from the command line.
LineDirective = "# 1 \"<command line>\" 1\n";
PredefineBuffer.insert(PredefineBuffer.end(),
LineDirective, LineDirective+strlen(LineDirective));
// Process #define's and #undef's in the order they are given.
for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) {
if (InitOpts.Macros[i].second) // isUndef
UndefineBuiltinMacro(PredefineBuffer, InitOpts.Macros[i].first.c_str());
else
DefineBuiltinMacro(PredefineBuffer, InitOpts.Macros[i].first.c_str(),
&PP.getDiagnostics());
}
// If -imacros are specified, include them now. These are processed before
// any -include directives.
for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
AddImplicitIncludeMacros(PredefineBuffer, InitOpts.MacroIncludes[i]);
// Process -include directives.
for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
const std::string &Path = InitOpts.Includes[i];
if (Path == InitOpts.ImplicitPTHInclude)
AddImplicitIncludePTH(PredefineBuffer, PP, Path);
else
AddImplicitInclude(PredefineBuffer, Path);
}
// Exit the command line and go back to <built-in> (2 is LC_LEAVE).
LineDirective = "# 1 \"<built-in>\" 2\n";
PredefineBuffer.insert(PredefineBuffer.end(),
LineDirective, LineDirective+strlen(LineDirective));
// Null terminate PredefinedBuffer and add it.
PredefineBuffer.push_back(0);
PP.setPredefines(&PredefineBuffer[0]);
// Initialize the header search object.
ApplyHeaderSearchOptions(PP.getHeaderSearchInfo(), HSOpts,
PP.getLangOptions(),
PP.getTargetInfo().getTriple());
}
/// HasFeature - Return true if we recognize and implement the specified feature
/// specified by the identifier.
static bool HasFeature(const Preprocessor &PP, const IdentifierInfo *II) {
const LangOptions &LangOpts = PP.getLangOptions();
return llvm::StringSwitch<bool>(II->getName())
.Case("attribute_analyzer_noreturn", true)
.Case("attribute_cf_returns_not_retained", true)
.Case("attribute_cf_returns_retained", true)
.Case("attribute_ext_vector_type", true)
.Case("attribute_ns_returns_not_retained", true)
.Case("attribute_ns_returns_retained", true)
.Case("attribute_objc_ivar_unused", true)
.Case("attribute_overloadable", true)
.Case("blocks", LangOpts.Blocks)
.Case("cxx_attributes", LangOpts.CPlusPlus0x)
.Case("cxx_auto_type", LangOpts.CPlusPlus0x)
.Case("cxx_decltype", LangOpts.CPlusPlus0x)
.Case("cxx_deleted_functions", LangOpts.CPlusPlus0x)
.Case("cxx_exceptions", LangOpts.Exceptions)
.Case("cxx_rtti", LangOpts.RTTI)
.Case("cxx_static_assert", LangOpts.CPlusPlus0x)
.Case("objc_nonfragile_abi", LangOpts.ObjCNonFragileABI)
.Case("objc_weak_class", LangOpts.ObjCNonFragileABI)
.Case("ownership_holds", true)
.Case("ownership_returns", true)
.Case("ownership_takes", true)
.Case("cxx_inline_namespaces", true)
//.Case("cxx_concepts", false)
//.Case("cxx_lambdas", false)
//.Case("cxx_nullptr", false)
//.Case("cxx_rvalue_references", false)
//.Case("cxx_variadic_templates", false)
.Case("tls", PP.getTargetInfo().isTLSSupported())
.Default(false);
}
/// InitializePreprocessor - Initialize the preprocessor getting it and the
/// environment ready to process a single file. This returns true on error.
///
bool InitializePreprocessor(Preprocessor &PP,
const PreprocessorInitOptions& InitOpts) {
std::vector<char> PredefineBuffer;
const char *LineDirective = "# 1 \"<built-in>\" 3\n";
PredefineBuffer.insert(PredefineBuffer.end(),
LineDirective, LineDirective+strlen(LineDirective));
// Install things like __POWERPC__, __GNUC__, etc into the macro table.
InitializePredefinedMacros(PP.getTargetInfo(), PP.getLangOptions(),
PredefineBuffer);
// Add on the predefines from the driver. Wrap in a #line directive to report
// that they come from the command line.
LineDirective = "# 1 \"<command line>\" 1\n";
PredefineBuffer.insert(PredefineBuffer.end(),
LineDirective, LineDirective+strlen(LineDirective));
// Process #define's and #undef's in the order they are given.
for (PreprocessorInitOptions::macro_iterator I = InitOpts.macro_begin(),
E = InitOpts.macro_end(); I != E; ++I) {
if (I->second) // isUndef
UndefineBuiltinMacro(PredefineBuffer, I->first.c_str());
else
DefineBuiltinMacro(PredefineBuffer, I->first.c_str());
}
// If -imacros are specified, include them now. These are processed before
// any -include directives.
for (PreprocessorInitOptions::imacro_iterator I = InitOpts.imacro_begin(),
E = InitOpts.imacro_end(); I != E; ++I)
AddImplicitIncludeMacros(PredefineBuffer, *I);
// Process -include directives.
for (PreprocessorInitOptions::include_iterator I = InitOpts.include_begin(),
E = InitOpts.include_end(); I != E; ++I) {
if (I->second) // isPTH
AddImplicitIncludePTH(PredefineBuffer, PP, I->first);
else
AddImplicitInclude(PredefineBuffer, I->first);
}
// Null terminate PredefinedBuffer and add it.
PredefineBuffer.push_back(0);
PP.setPredefines(&PredefineBuffer[0]);
// Once we've read this, we're done.
return false;
}
/// Finish - This does final analysis of the declspec, rejecting things like
/// "_Imaginary" (lacking an FP type). This returns a diagnostic to issue or
/// diag::NUM_DIAGNOSTICS if there is no error. After calling this method,
/// DeclSpec is guaranteed self-consistent, even if an error occurred.
void DeclSpec::Finish(DiagnosticsEngine &D, Preprocessor &PP, const PrintingPolicy &Policy) {
// Before possibly changing their values, save specs as written.
SaveWrittenBuiltinSpecs();
// Check the type specifier components first.
// If decltype(auto) is used, no other type specifiers are permitted.
if (TypeSpecType == TST_decltype_auto &&
(TypeSpecWidth != TSW_unspecified ||
TypeSpecComplex != TSC_unspecified ||
TypeSpecSign != TSS_unspecified ||
TypeAltiVecVector || TypeAltiVecPixel || TypeAltiVecBool ||
TypeQualifiers)) {
const unsigned NumLocs = 8;
SourceLocation ExtraLocs[NumLocs] = {
TSWLoc, TSCLoc, TSSLoc, AltiVecLoc,
TQ_constLoc, TQ_restrictLoc, TQ_volatileLoc, TQ_atomicLoc
};
FixItHint Hints[NumLocs];
SourceLocation FirstLoc;
for (unsigned I = 0; I != NumLocs; ++I) {
if (!ExtraLocs[I].isInvalid()) {
if (FirstLoc.isInvalid() ||
PP.getSourceManager().isBeforeInTranslationUnit(ExtraLocs[I],
FirstLoc))
FirstLoc = ExtraLocs[I];
Hints[I] = FixItHint::CreateRemoval(ExtraLocs[I]);
}
}
TypeSpecWidth = TSW_unspecified;
TypeSpecComplex = TSC_unspecified;
TypeSpecSign = TSS_unspecified;
TypeAltiVecVector = TypeAltiVecPixel = TypeAltiVecBool = false;
TypeQualifiers = 0;
Diag(D, TSTLoc, diag::err_decltype_auto_cannot_be_combined)
<< Hints[0] << Hints[1] << Hints[2] << Hints[3]
<< Hints[4] << Hints[5] << Hints[6] << Hints[7];
}
// Validate and finalize AltiVec vector declspec.
if (TypeAltiVecVector) {
if (TypeAltiVecBool) {
// Sign specifiers are not allowed with vector bool. (PIM 2.1)
if (TypeSpecSign != TSS_unspecified) {
Diag(D, TSSLoc, diag::err_invalid_vector_bool_decl_spec)
<< getSpecifierName((TSS)TypeSpecSign);
}
// Only char/int are valid with vector bool. (PIM 2.1)
if (((TypeSpecType != TST_unspecified) && (TypeSpecType != TST_char) &&
(TypeSpecType != TST_int)) || TypeAltiVecPixel) {
Diag(D, TSTLoc, diag::err_invalid_vector_bool_decl_spec)
<< (TypeAltiVecPixel ? "__pixel" :
getSpecifierName((TST)TypeSpecType, Policy));
}
// Only 'short' and 'long long' are valid with vector bool. (PIM 2.1)
if ((TypeSpecWidth != TSW_unspecified) && (TypeSpecWidth != TSW_short) &&
(TypeSpecWidth != TSW_longlong))
Diag(D, TSWLoc, diag::err_invalid_vector_bool_decl_spec)
<< getSpecifierName((TSW)TypeSpecWidth);
// vector bool long long requires VSX support.
if ((TypeSpecWidth == TSW_longlong) &&
(!PP.getTargetInfo().hasFeature("vsx")) &&
(!PP.getTargetInfo().hasFeature("power8-vector")))
Diag(D, TSTLoc, diag::err_invalid_vector_long_long_decl_spec);
// Elements of vector bool are interpreted as unsigned. (PIM 2.1)
if ((TypeSpecType == TST_char) || (TypeSpecType == TST_int) ||
(TypeSpecWidth != TSW_unspecified))
TypeSpecSign = TSS_unsigned;
} else if (TypeSpecType == TST_double) {
// vector long double and vector long long double are never allowed.
// vector double is OK for Power7 and later.
if (TypeSpecWidth == TSW_long || TypeSpecWidth == TSW_longlong)
Diag(D, TSWLoc, diag::err_invalid_vector_long_double_decl_spec);
else if (!PP.getTargetInfo().hasFeature("vsx"))
Diag(D, TSTLoc, diag::err_invalid_vector_double_decl_spec);
} else if (TypeSpecWidth == TSW_long) {
Diag(D, TSWLoc, diag::warn_vector_long_decl_spec_combination)
<< getSpecifierName((TST)TypeSpecType, Policy);
}
if (TypeAltiVecPixel) {
//TODO: perform validation
TypeSpecType = TST_int;
TypeSpecSign = TSS_unsigned;
TypeSpecWidth = TSW_short;
TypeSpecOwned = false;
}
}
// signed/unsigned are only valid with int/char/wchar_t.
if (TypeSpecSign != TSS_unspecified) {
if (TypeSpecType == TST_unspecified)
TypeSpecType = TST_int; // unsigned -> unsigned int, signed -> signed int.
else if (TypeSpecType != TST_int && TypeSpecType != TST_int128 &&
TypeSpecType != TST_char && TypeSpecType != TST_wchar) {
Diag(D, TSSLoc, diag::err_invalid_sign_spec)
<< getSpecifierName((TST)TypeSpecType, Policy);
// signed double -> double.
TypeSpecSign = TSS_unspecified;
}
}
// Validate the width of the type.
switch (TypeSpecWidth) {
case TSW_unspecified: break;
case TSW_short: // short int
case TSW_longlong: // long long int
if (TypeSpecType == TST_unspecified)
TypeSpecType = TST_int; // short -> short int, long long -> long long int.
else if (TypeSpecType != TST_int) {
Diag(D, TSWLoc,
TypeSpecWidth == TSW_short ? diag::err_invalid_short_spec
: diag::err_invalid_longlong_spec)
<< getSpecifierName((TST)TypeSpecType, Policy);
TypeSpecType = TST_int;
TypeSpecOwned = false;
}
break;
case TSW_long: // long double, long int
if (TypeSpecType == TST_unspecified)
TypeSpecType = TST_int; // long -> long int.
else if (TypeSpecType != TST_int && TypeSpecType != TST_double) {
Diag(D, TSWLoc, diag::err_invalid_long_spec)
<< getSpecifierName((TST)TypeSpecType, Policy);
TypeSpecType = TST_int;
TypeSpecOwned = false;
}
break;
}
// TODO: if the implementation does not implement _Complex or _Imaginary,
// disallow their use. Need information about the backend.
if (TypeSpecComplex != TSC_unspecified) {
if (TypeSpecType == TST_unspecified) {
Diag(D, TSCLoc, diag::ext_plain_complex)
<< FixItHint::CreateInsertion(
PP.getLocForEndOfToken(getTypeSpecComplexLoc()),
" double");
TypeSpecType = TST_double; // _Complex -> _Complex double.
} else if (TypeSpecType == TST_int || TypeSpecType == TST_char) {
// Note that this intentionally doesn't include _Complex _Bool.
if (!PP.getLangOpts().CPlusPlus)
Diag(D, TSTLoc, diag::ext_integer_complex);
} else if (TypeSpecType != TST_float && TypeSpecType != TST_double) {
Diag(D, TSCLoc, diag::err_invalid_complex_spec)
<< getSpecifierName((TST)TypeSpecType, Policy);
TypeSpecComplex = TSC_unspecified;
}
}
// C11 6.7.1/3, C++11 [dcl.stc]p1, GNU TLS: __thread, thread_local and
// _Thread_local can only appear with the 'static' and 'extern' storage class
// specifiers. We also allow __private_extern__ as an extension.
if (ThreadStorageClassSpec != TSCS_unspecified) {
switch (StorageClassSpec) {
case SCS_unspecified:
case SCS_extern:
case SCS_private_extern:
case SCS_static:
break;
default:
if (PP.getSourceManager().isBeforeInTranslationUnit(
getThreadStorageClassSpecLoc(), getStorageClassSpecLoc()))
Diag(D, getStorageClassSpecLoc(),
diag::err_invalid_decl_spec_combination)
<< DeclSpec::getSpecifierName(getThreadStorageClassSpec())
<< SourceRange(getThreadStorageClassSpecLoc());
else
Diag(D, getThreadStorageClassSpecLoc(),
diag::err_invalid_decl_spec_combination)
<< DeclSpec::getSpecifierName(getStorageClassSpec())
<< SourceRange(getStorageClassSpecLoc());
// Discard the thread storage class specifier to recover.
ThreadStorageClassSpec = TSCS_unspecified;
ThreadStorageClassSpecLoc = SourceLocation();
}
}
// If no type specifier was provided and we're parsing a language where
// the type specifier is not optional, but we got 'auto' as a storage
// class specifier, then assume this is an attempt to use C++0x's 'auto'
// type specifier.
if (PP.getLangOpts().CPlusPlus &&
TypeSpecType == TST_unspecified && StorageClassSpec == SCS_auto) {
TypeSpecType = TST_auto;
StorageClassSpec = SCS_unspecified;
TSTLoc = TSTNameLoc = StorageClassSpecLoc;
StorageClassSpecLoc = SourceLocation();
}
// Diagnose if we've recovered from an ill-formed 'auto' storage class
// specifier in a pre-C++11 dialect of C++.
if (!PP.getLangOpts().CPlusPlus11 && TypeSpecType == TST_auto)
Diag(D, TSTLoc, diag::ext_auto_type_specifier);
if (PP.getLangOpts().CPlusPlus && !PP.getLangOpts().CPlusPlus11 &&
StorageClassSpec == SCS_auto)
Diag(D, StorageClassSpecLoc, diag::warn_auto_storage_class)
<< FixItHint::CreateRemoval(StorageClassSpecLoc);
if (TypeSpecType == TST_char16 || TypeSpecType == TST_char32)
Diag(D, TSTLoc, diag::warn_cxx98_compat_unicode_type)
<< (TypeSpecType == TST_char16 ? "char16_t" : "char32_t");
if (Constexpr_specified)
Diag(D, ConstexprLoc, diag::warn_cxx98_compat_constexpr);
// C++ [class.friend]p6:
// No storage-class-specifier shall appear in the decl-specifier-seq
// of a friend declaration.
if (isFriendSpecified() &&
(getStorageClassSpec() || getThreadStorageClassSpec())) {
SmallString<32> SpecName;
SourceLocation SCLoc;
FixItHint StorageHint, ThreadHint;
if (DeclSpec::SCS SC = getStorageClassSpec()) {
SpecName = getSpecifierName(SC);
SCLoc = getStorageClassSpecLoc();
StorageHint = FixItHint::CreateRemoval(SCLoc);
}
if (DeclSpec::TSCS TSC = getThreadStorageClassSpec()) {
if (!SpecName.empty()) SpecName += " ";
SpecName += getSpecifierName(TSC);
SCLoc = getThreadStorageClassSpecLoc();
ThreadHint = FixItHint::CreateRemoval(SCLoc);
}
Diag(D, SCLoc, diag::err_friend_decl_spec)
<< SpecName << StorageHint << ThreadHint;
ClearStorageClassSpecs();
}
// C++11 [dcl.fct.spec]p5:
// The virtual specifier shall be used only in the initial
// declaration of a non-static class member function;
// C++11 [dcl.fct.spec]p6:
// The explicit specifier shall be used only in the declaration of
// a constructor or conversion function within its class
// definition;
if (isFriendSpecified() && (isVirtualSpecified() || isExplicitSpecified())) {
StringRef Keyword;
SourceLocation SCLoc;
if (isVirtualSpecified()) {
Keyword = "virtual";
SCLoc = getVirtualSpecLoc();
} else {
Keyword = "explicit";
SCLoc = getExplicitSpecLoc();
}
FixItHint Hint = FixItHint::CreateRemoval(SCLoc);
Diag(D, SCLoc, diag::err_friend_decl_spec)
<< Keyword << Hint;
FS_virtual_specified = FS_explicit_specified = false;
FS_virtualLoc = FS_explicitLoc = SourceLocation();
}
assert(!TypeSpecOwned || isDeclRep((TST) TypeSpecType));
// Okay, now we can infer the real type.
// TODO: return "auto function" and other bad things based on the real type.
// 'data definition has no type or storage class'?
}
/// InitializePreprocessor - Initialize the preprocessor getting it and the
/// environment ready to process a single file. This returns true on error.
///
void clang::InitializePreprocessor(
Preprocessor &PP, const PreprocessorOptions &InitOpts,
const PCHContainerReader &PCHContainerRdr,
const FrontendOptions &FEOpts) {
const LangOptions &LangOpts = PP.getLangOpts();
std::string PredefineBuffer;
PredefineBuffer.reserve(4080);
llvm::raw_string_ostream Predefines(PredefineBuffer);
MacroBuilder Builder(Predefines);
// Emit line markers for various builtin sections of the file. We don't do
// this in asm preprocessor mode, because "# 4" is not a line marker directive
// in this mode.
if (!PP.getLangOpts().AsmPreprocessor)
Builder.append("# 1 \"<built-in>\" 3");
// Install things like __POWERPC__, __GNUC__, etc into the macro table.
if (InitOpts.UsePredefines) {
if (LangOpts.CUDA && PP.getAuxTargetInfo())
InitializePredefinedMacros(*PP.getAuxTargetInfo(), LangOpts, FEOpts,
Builder);
InitializePredefinedMacros(PP.getTargetInfo(), LangOpts, FEOpts, Builder);
// Install definitions to make Objective-C++ ARC work well with various
// C++ Standard Library implementations.
if (LangOpts.ObjC1 && LangOpts.CPlusPlus &&
(LangOpts.ObjCAutoRefCount || LangOpts.ObjCWeak)) {
switch (InitOpts.ObjCXXARCStandardLibrary) {
case ARCXX_nolib:
case ARCXX_libcxx:
break;
case ARCXX_libstdcxx:
AddObjCXXARCLibstdcxxDefines(LangOpts, Builder);
break;
}
}
}
// Even with predefines off, some macros are still predefined.
// These should all be defined in the preprocessor according to the
// current language configuration.
InitializeStandardPredefinedMacros(PP.getTargetInfo(), PP.getLangOpts(),
FEOpts, Builder);
// Add on the predefines from the driver. Wrap in a #line directive to report
// that they come from the command line.
if (!PP.getLangOpts().AsmPreprocessor)
Builder.append("# 1 \"<command line>\" 1");
// Process #define's and #undef's in the order they are given.
for (unsigned i = 0, e = InitOpts.Macros.size(); i != e; ++i) {
if (InitOpts.Macros[i].second) // isUndef
Builder.undefineMacro(InitOpts.Macros[i].first);
else
DefineBuiltinMacro(Builder, InitOpts.Macros[i].first,
PP.getDiagnostics());
}
// Exit the command line and go back to <built-in> (2 is LC_LEAVE).
if (!PP.getLangOpts().AsmPreprocessor)
Builder.append("# 1 \"<built-in>\" 2");
// If -imacros are specified, include them now. These are processed before
// any -include directives.
for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]);
// Process -include-pch/-include-pth directives.
if (!InitOpts.ImplicitPCHInclude.empty())
AddImplicitIncludePCH(Builder, PP, PCHContainerRdr,
InitOpts.ImplicitPCHInclude);
if (!InitOpts.ImplicitPTHInclude.empty())
AddImplicitIncludePTH(Builder, PP, InitOpts.ImplicitPTHInclude);
// Process -include directives.
for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
const std::string &Path = InitOpts.Includes[i];
AddImplicitInclude(Builder, Path);
}
// Instruct the preprocessor to skip the preamble.
PP.setSkipMainFilePreamble(InitOpts.PrecompiledPreambleBytes.first,
InitOpts.PrecompiledPreambleBytes.second);
// Copy PredefinedBuffer into the Preprocessor.
PP.setPredefines(Predefines.str());
}
/// HasFeature - Return true if we recognize and implement the feature
/// specified by the identifier as a standard language feature.
static bool HasFeature(const Preprocessor &PP, const IdentifierInfo *II) {
const LangOptions &LangOpts = PP.getLangOptions();
return llvm::StringSwitch<bool>(II->getName())
.Case("address_sanitizer", LangOpts.AddressSanitizer)
.Case("attribute_analyzer_noreturn", true)
.Case("attribute_availability", true)
.Case("attribute_cf_returns_not_retained", true)
.Case("attribute_cf_returns_retained", true)
.Case("attribute_deprecated_with_message", true)
.Case("attribute_ext_vector_type", true)
.Case("attribute_ns_returns_not_retained", true)
.Case("attribute_ns_returns_retained", true)
.Case("attribute_ns_consumes_self", true)
.Case("attribute_ns_consumed", true)
.Case("attribute_cf_consumed", true)
.Case("attribute_objc_ivar_unused", true)
.Case("attribute_objc_method_family", true)
.Case("attribute_overloadable", true)
.Case("attribute_unavailable_with_message", true)
.Case("blocks", LangOpts.Blocks)
.Case("cxx_exceptions", LangOpts.Exceptions)
.Case("cxx_rtti", LangOpts.RTTI)
.Case("enumerator_attributes", true)
// Objective-C features
.Case("objc_arr", LangOpts.ObjCAutoRefCount) // FIXME: REMOVE?
.Case("objc_arc", LangOpts.ObjCAutoRefCount)
.Case("objc_arc_weak", LangOpts.ObjCAutoRefCount &&
LangOpts.ObjCRuntimeHasWeak)
.Case("objc_fixed_enum", LangOpts.ObjC2)
.Case("objc_instancetype", LangOpts.ObjC2)
.Case("objc_nonfragile_abi", LangOpts.ObjCNonFragileABI)
.Case("objc_weak_class", LangOpts.ObjCNonFragileABI)
.Case("ownership_holds", true)
.Case("ownership_returns", true)
.Case("ownership_takes", true)
.Case("arc_cf_code_audited", true)
// C11 features
.Case("c_alignas", LangOpts.C11)
.Case("c_generic_selections", LangOpts.C11)
.Case("c_static_assert", LangOpts.C11)
// C++0x features
.Case("cxx_access_control_sfinae", LangOpts.CPlusPlus0x)
.Case("cxx_alias_templates", LangOpts.CPlusPlus0x)
.Case("cxx_alignas", LangOpts.CPlusPlus0x)
.Case("cxx_attributes", LangOpts.CPlusPlus0x)
.Case("cxx_auto_type", LangOpts.CPlusPlus0x)
//.Case("cxx_constexpr", false);
.Case("cxx_decltype", LangOpts.CPlusPlus0x)
.Case("cxx_default_function_template_args", LangOpts.CPlusPlus0x)
.Case("cxx_defaulted_functions", LangOpts.CPlusPlus0x)
.Case("cxx_delegating_constructors", LangOpts.CPlusPlus0x)
.Case("cxx_deleted_functions", LangOpts.CPlusPlus0x)
.Case("cxx_explicit_conversions", LangOpts.CPlusPlus0x)
//.Case("cxx_generalized_initializers", LangOpts.CPlusPlus0x)
.Case("cxx_implicit_moves", LangOpts.CPlusPlus0x)
//.Case("cxx_inheriting_constructors", false)
.Case("cxx_inline_namespaces", LangOpts.CPlusPlus0x)
//.Case("cxx_lambdas", false)
.Case("cxx_nonstatic_member_init", LangOpts.CPlusPlus0x)
.Case("cxx_noexcept", LangOpts.CPlusPlus0x)
.Case("cxx_nullptr", LangOpts.CPlusPlus0x)
.Case("cxx_override_control", LangOpts.CPlusPlus0x)
.Case("cxx_range_for", LangOpts.CPlusPlus0x)
.Case("cxx_raw_string_literals", LangOpts.CPlusPlus0x)
.Case("cxx_reference_qualified_functions", LangOpts.CPlusPlus0x)
.Case("cxx_rvalue_references", LangOpts.CPlusPlus0x)
.Case("cxx_strong_enums", LangOpts.CPlusPlus0x)
.Case("cxx_static_assert", LangOpts.CPlusPlus0x)
.Case("cxx_trailing_return", LangOpts.CPlusPlus0x)
.Case("cxx_unicode_literals", LangOpts.CPlusPlus0x)
//.Case("cxx_unrestricted_unions", false)
//.Case("cxx_user_literals", false)
.Case("cxx_variadic_templates", LangOpts.CPlusPlus0x)
// Type traits
.Case("has_nothrow_assign", LangOpts.CPlusPlus)
.Case("has_nothrow_copy", LangOpts.CPlusPlus)
.Case("has_nothrow_constructor", LangOpts.CPlusPlus)
.Case("has_trivial_assign", LangOpts.CPlusPlus)
.Case("has_trivial_copy", LangOpts.CPlusPlus)
.Case("has_trivial_constructor", LangOpts.CPlusPlus)
.Case("has_trivial_destructor", LangOpts.CPlusPlus)
.Case("has_virtual_destructor", LangOpts.CPlusPlus)
.Case("is_abstract", LangOpts.CPlusPlus)
.Case("is_base_of", LangOpts.CPlusPlus)
.Case("is_class", LangOpts.CPlusPlus)
.Case("is_convertible_to", LangOpts.CPlusPlus)
// __is_empty is available only if the horrible
// "struct __is_empty" parsing hack hasn't been needed in this
// translation unit. If it has, __is_empty reverts to a normal
// identifier and __has_feature(is_empty) evaluates false.
.Case("is_empty",
LangOpts.CPlusPlus &&
PP.getIdentifierInfo("__is_empty")->getTokenID()
!= tok::identifier)
.Case("is_enum", LangOpts.CPlusPlus)
.Case("is_final", LangOpts.CPlusPlus)
.Case("is_literal", LangOpts.CPlusPlus)
.Case("is_standard_layout", LangOpts.CPlusPlus)
// __is_pod is available only if the horrible
// "struct __is_pod" parsing hack hasn't been needed in this
// translation unit. If it has, __is_pod reverts to a normal
// identifier and __has_feature(is_pod) evaluates false.
.Case("is_pod",
LangOpts.CPlusPlus &&
PP.getIdentifierInfo("__is_pod")->getTokenID()
!= tok::identifier)
.Case("is_polymorphic", LangOpts.CPlusPlus)
.Case("is_trivial", LangOpts.CPlusPlus)
.Case("is_trivially_copyable", LangOpts.CPlusPlus)
.Case("is_union", LangOpts.CPlusPlus)
.Case("tls", PP.getTargetInfo().isTLSSupported())
.Case("underlying_type", LangOpts.CPlusPlus)
.Default(false);
}
/// EvaluateValue - Evaluate the token PeekTok (and any others needed) and
/// return the computed value in Result. Return true if there was an error
/// parsing. This function also returns information about the form of the
/// expression in DT. See above for information on what DT means.
///
/// If ValueLive is false, then this value is being evaluated in a context where
/// the result is not used. As such, avoid diagnostics that relate to
/// evaluation.
static bool EvaluateValue(PPValue &Result, Token &PeekTok, DefinedTracker &DT,
bool ValueLive, Preprocessor &PP) {
DT.State = DefinedTracker::Unknown;
if (PeekTok.is(tok::code_completion)) {
if (PP.getCodeCompletionHandler())
PP.getCodeCompletionHandler()->CodeCompletePreprocessorExpression();
PP.setCodeCompletionReached();
PP.LexNonComment(PeekTok);
}
// If this token's spelling is a pp-identifier, check to see if it is
// 'defined' or if it is a macro. Note that we check here because many
// keywords are pp-identifiers, so we can't check the kind.
if (IdentifierInfo *II = PeekTok.getIdentifierInfo()) {
// Handle "defined X" and "defined(X)".
if (II->isStr("defined"))
return(EvaluateDefined(Result, PeekTok, DT, ValueLive, PP));
// If this identifier isn't 'defined' or one of the special
// preprocessor keywords and it wasn't macro expanded, it turns
// into a simple 0, unless it is the C++ keyword "true", in which case it
// turns into "1".
if (ValueLive &&
II->getTokenID() != tok::kw_true &&
II->getTokenID() != tok::kw_false)
PP.Diag(PeekTok, diag::warn_pp_undef_identifier) << II;
Result.Val = II->getTokenID() == tok::kw_true;
Result.Val.setIsUnsigned(false); // "0" is signed intmax_t 0.
Result.setRange(PeekTok.getLocation());
PP.LexNonComment(PeekTok);
return false;
}
switch (PeekTok.getKind()) {
default: // Non-value token.
PP.Diag(PeekTok, diag::err_pp_expr_bad_token_start_expr);
return true;
case tok::eod:
case tok::r_paren:
// If there is no expression, report and exit.
PP.Diag(PeekTok, diag::err_pp_expected_value_in_expr);
return true;
case tok::numeric_constant: {
SmallString<64> IntegerBuffer;
bool NumberInvalid = false;
StringRef Spelling = PP.getSpelling(PeekTok, IntegerBuffer,
&NumberInvalid);
if (NumberInvalid)
return true; // a diagnostic was already reported
NumericLiteralParser Literal(Spelling, PeekTok.getLocation(), PP);
if (Literal.hadError)
return true; // a diagnostic was already reported.
if (Literal.isFloatingLiteral() || Literal.isImaginary) {
PP.Diag(PeekTok, diag::err_pp_illegal_floating_literal);
return true;
}
assert(Literal.isIntegerLiteral() && "Unknown ppnumber");
// Complain about, and drop, any ud-suffix.
if (Literal.hasUDSuffix())
PP.Diag(PeekTok, diag::err_pp_invalid_udl) << /*integer*/1;
// 'long long' is a C99 or C++11 feature.
if (!PP.getLangOpts().C99 && Literal.isLongLong) {
if (PP.getLangOpts().CPlusPlus)
PP.Diag(PeekTok,
PP.getLangOpts().CPlusPlus0x ?
diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong);
else
PP.Diag(PeekTok, diag::ext_c99_longlong);
}
// Parse the integer literal into Result.
if (Literal.GetIntegerValue(Result.Val)) {
// Overflow parsing integer literal.
if (ValueLive) PP.Diag(PeekTok, diag::warn_integer_too_large);
Result.Val.setIsUnsigned(true);
} else {
// Set the signedness of the result to match whether there was a U suffix
// or not.
Result.Val.setIsUnsigned(Literal.isUnsigned);
// Detect overflow based on whether the value is signed. If signed
// and if the value is too large, emit a warning "integer constant is so
// large that it is unsigned" e.g. on 12345678901234567890 where intmax_t
// is 64-bits.
if (!Literal.isUnsigned && Result.Val.isNegative()) {
// Don't warn for a hex literal: 0x8000..0 shouldn't warn.
if (ValueLive && Literal.getRadix() != 16)
PP.Diag(PeekTok, diag::warn_integer_too_large_for_signed);
Result.Val.setIsUnsigned(true);
}
}
// Consume the token.
Result.setRange(PeekTok.getLocation());
PP.LexNonComment(PeekTok);
return false;
}
case tok::char_constant: // 'x'
case tok::wide_char_constant: { // L'x'
case tok::utf16_char_constant: // u'x'
case tok::utf32_char_constant: // U'x'
// Complain about, and drop, any ud-suffix.
if (PeekTok.hasUDSuffix())
PP.Diag(PeekTok, diag::err_pp_invalid_udl) << /*character*/0;
SmallString<32> CharBuffer;
bool CharInvalid = false;
StringRef ThisTok = PP.getSpelling(PeekTok, CharBuffer, &CharInvalid);
if (CharInvalid)
return true;
CharLiteralParser Literal(ThisTok.begin(), ThisTok.end(),
PeekTok.getLocation(), PP, PeekTok.getKind());
if (Literal.hadError())
return true; // A diagnostic was already emitted.
// Character literals are always int or wchar_t, expand to intmax_t.
const TargetInfo &TI = PP.getTargetInfo();
unsigned NumBits;
if (Literal.isMultiChar())
NumBits = TI.getIntWidth();
else if (Literal.isWide())
NumBits = TI.getWCharWidth();
else if (Literal.isUTF16())
NumBits = TI.getChar16Width();
else if (Literal.isUTF32())
NumBits = TI.getChar32Width();
else
NumBits = TI.getCharWidth();
// Set the width.
llvm::APSInt Val(NumBits);
// Set the value.
Val = Literal.getValue();
// Set the signedness. UTF-16 and UTF-32 are always unsigned
if (!Literal.isUTF16() && !Literal.isUTF32())
Val.setIsUnsigned(!PP.getLangOpts().CharIsSigned);
if (Result.Val.getBitWidth() > Val.getBitWidth()) {
Result.Val = Val.extend(Result.Val.getBitWidth());
} else {
assert(Result.Val.getBitWidth() == Val.getBitWidth() &&
"intmax_t smaller than char/wchar_t?");
Result.Val = Val;
}
// Consume the token.
Result.setRange(PeekTok.getLocation());
PP.LexNonComment(PeekTok);
return false;
}
case tok::l_paren: {
SourceLocation Start = PeekTok.getLocation();
PP.LexNonComment(PeekTok); // Eat the (.
// Parse the value and if there are any binary operators involved, parse
// them.
if (EvaluateValue(Result, PeekTok, DT, ValueLive, PP)) return true;
// If this is a silly value like (X), which doesn't need parens, check for
// !(defined X).
if (PeekTok.is(tok::r_paren)) {
// Just use DT unmodified as our result.
} else {
// Otherwise, we have something like (x+y), and we consumed '(x'.
if (EvaluateDirectiveSubExpr(Result, 1, PeekTok, ValueLive, PP))
return true;
if (PeekTok.isNot(tok::r_paren)) {
PP.Diag(PeekTok.getLocation(), diag::err_pp_expected_rparen)
<< Result.getRange();
PP.Diag(Start, diag::note_matching) << "(";
return true;
}
DT.State = DefinedTracker::Unknown;
}
Result.setRange(Start, PeekTok.getLocation());
PP.LexNonComment(PeekTok); // Eat the ).
return false;
}
case tok::plus: {
SourceLocation Start = PeekTok.getLocation();
// Unary plus doesn't modify the value.
PP.LexNonComment(PeekTok);
if (EvaluateValue(Result, PeekTok, DT, ValueLive, PP)) return true;
Result.setBegin(Start);
return false;
}
case tok::minus: {
SourceLocation Loc = PeekTok.getLocation();
PP.LexNonComment(PeekTok);
if (EvaluateValue(Result, PeekTok, DT, ValueLive, PP)) return true;
Result.setBegin(Loc);
// C99 6.5.3.3p3: The sign of the result matches the sign of the operand.
Result.Val = -Result.Val;
// -MININT is the only thing that overflows. Unsigned never overflows.
bool Overflow = !Result.isUnsigned() && Result.Val.isMinSignedValue();
// If this operator is live and overflowed, report the issue.
if (Overflow && ValueLive)
PP.Diag(Loc, diag::warn_pp_expr_overflow) << Result.getRange();
DT.State = DefinedTracker::Unknown;
return false;
}
case tok::tilde: {
SourceLocation Start = PeekTok.getLocation();
PP.LexNonComment(PeekTok);
if (EvaluateValue(Result, PeekTok, DT, ValueLive, PP)) return true;
Result.setBegin(Start);
// C99 6.5.3.3p4: The sign of the result matches the sign of the operand.
Result.Val = ~Result.Val;
DT.State = DefinedTracker::Unknown;
return false;
}
case tok::exclaim: {
SourceLocation Start = PeekTok.getLocation();
PP.LexNonComment(PeekTok);
if (EvaluateValue(Result, PeekTok, DT, ValueLive, PP)) return true;
Result.setBegin(Start);
Result.Val = !Result.Val;
// C99 6.5.3.3p5: The sign of the result is 'int', aka it is signed.
Result.Val.setIsUnsigned(false);
if (DT.State == DefinedTracker::DefinedMacro)
DT.State = DefinedTracker::NotDefinedMacro;
else if (DT.State == DefinedTracker::NotDefinedMacro)
DT.State = DefinedTracker::DefinedMacro;
return false;
}
// FIXME: Handle #assert
}
}
/// HasFeature - Return true if we recognize and implement the specified feature
/// specified by the identifier.
static bool HasFeature(const Preprocessor &PP, const IdentifierInfo *II) {
const LangOptions &LangOpts = PP.getLangOptions();
return llvm::StringSwitch<bool>(II->getName())
.Case("attribute_analyzer_noreturn", true)
.Case("attribute_cf_returns_not_retained", true)
.Case("attribute_cf_returns_retained", true)
.Case("attribute_deprecated_with_message", true)
.Case("attribute_ext_vector_type", true)
.Case("attribute_ns_returns_not_retained", true)
.Case("attribute_ns_returns_retained", true)
.Case("attribute_ns_consumes_self", true)
.Case("attribute_ns_consumed", true)
.Case("attribute_cf_consumed", true)
.Case("attribute_objc_ivar_unused", true)
.Case("attribute_objc_method_family", true)
.Case("attribute_overloadable", true)
.Case("attribute_unavailable_with_message", true)
.Case("blocks", LangOpts.Blocks)
.Case("cxx_exceptions", LangOpts.Exceptions)
.Case("cxx_rtti", LangOpts.RTTI)
.Case("enumerator_attributes", true)
.Case("objc_nonfragile_abi", LangOpts.ObjCNonFragileABI)
.Case("objc_weak_class", LangOpts.ObjCNonFragileABI)
.Case("ownership_holds", true)
.Case("ownership_returns", true)
.Case("ownership_takes", true)
// C++0x features
.Case("cxx_attributes", LangOpts.CPlusPlus0x)
.Case("cxx_auto_type", LangOpts.CPlusPlus0x)
.Case("cxx_decltype", LangOpts.CPlusPlus0x)
.Case("cxx_default_function_template_args", LangOpts.CPlusPlus0x)
.Case("cxx_deleted_functions", LangOpts.CPlusPlus0x)
.Case("cxx_inline_namespaces", LangOpts.CPlusPlus0x)
//.Case("cxx_lambdas", false)
//.Case("cxx_nullptr", false)
.Case("cxx_reference_qualified_functions", LangOpts.CPlusPlus0x)
.Case("cxx_rvalue_references", LangOpts.CPlusPlus0x)
.Case("cxx_strong_enums", LangOpts.CPlusPlus0x)
.Case("cxx_static_assert", LangOpts.CPlusPlus0x)
.Case("cxx_trailing_return", LangOpts.CPlusPlus0x)
.Case("cxx_variadic_templates", LangOpts.CPlusPlus0x)
// Type traits
.Case("has_nothrow_assign", LangOpts.CPlusPlus)
.Case("has_nothrow_copy", LangOpts.CPlusPlus)
.Case("has_nothrow_constructor", LangOpts.CPlusPlus)
.Case("has_trivial_assign", LangOpts.CPlusPlus)
.Case("has_trivial_copy", LangOpts.CPlusPlus)
.Case("has_trivial_constructor", LangOpts.CPlusPlus)
.Case("has_trivial_destructor", LangOpts.CPlusPlus)
.Case("has_virtual_destructor", LangOpts.CPlusPlus)
.Case("is_abstract", LangOpts.CPlusPlus)
.Case("is_base_of", LangOpts.CPlusPlus)
.Case("is_class", LangOpts.CPlusPlus)
.Case("is_convertible_to", LangOpts.CPlusPlus)
.Case("is_empty", LangOpts.CPlusPlus)
.Case("is_enum", LangOpts.CPlusPlus)
.Case("is_pod", LangOpts.CPlusPlus)
.Case("is_polymorphic", LangOpts.CPlusPlus)
.Case("is_union", LangOpts.CPlusPlus)
.Case("is_literal", LangOpts.CPlusPlus)
.Case("tls", PP.getTargetInfo().isTLSSupported())
.Default(false);
}