/// decimal integer: [1-9] [0-9]*
/// binary integer: "0" [bB] [01]+
/// octal integer: "0" [0-7]*
/// hex integer: "0" [xX] [0-9a-fA-F]+
///
/// float: "0" [a-zA-Z except bB or xX]
/// [-+]? [0-9]* ([.] [0-9]*)? ([eE] [-+]? [0-9]+)?
///
GasNumericParser::GasNumericParser(llvm::StringRef str,
SourceLocation loc,
Preprocessor& pp,
bool force_float)
: NumericParser(str)
{
// This routine assumes that the range begin/end matches the regex for
// integer and FP constants, and assumes that the byte at "*end" is both
// valid and not part of the regex. Because of this, it doesn't have to
// check for 'overscan' in various places.
assert(!isalnum(*m_digits_end) && *m_digits_end != '.' &&
"Lexer didn't maximally munch?");
const char* s = str.begin();
// Look for key radix prefixes
if (force_float)
{
// forced decimal float; skip the prefix if present
m_radix = 10;
m_is_float = true;
if (*s == '0' && isalpha(s[1]))
s += 2;
}
else if (*s == '0' && (s[1] == 'x' || s[1] == 'X'))
{
m_radix = 16;
s += 2;
}
else if (*s == '0' && (s[1] == 'b' || s[1] == 'B'))
{
m_radix = 2;
s += 2;
}
else if (*s == '0' && isalpha(s[1]))
{
// it's a decimal float; skip the prefix
m_radix = 10;
s += 2;
m_is_float = true;
}
else if (*s == '0')
{
// It's an octal integer
m_radix = 8;
}
else
{
// Otherwise it's a decimal
m_radix = 10;
}
m_digits_begin = s;
switch (m_radix)
{
case 2: s = SkipBinaryDigits(s); break;
case 8: s = SkipOctalDigits(s); break;
case 10: s = SkipDigits(s); break;
case 16: s = SkipHexDigits(s); break;
}
if (s == m_digits_end)
{
// Done.
}
else if (isxdigit(*s) && (!m_is_float || (*s != 'e' && *s != 'E')))
{
unsigned int err;
switch (m_radix)
{
case 2: err = diag::err_invalid_binary_digit; break;
case 8: err = diag::err_invalid_octal_digit; break;
case 10: err = diag::err_invalid_decimal_digit; break;
case 16:
default:
assert(false && "unexpected radix");
err = diag::err_invalid_decimal_digit;
break;
}
pp.Diag(pp.AdvanceToTokenCharacter(loc, s-str.begin()), err)
<< std::string(s, s+1);
m_had_error = true;
return;
}
else if (m_is_float)
{
if (*s == '-' || *s == '+')
{
++s;
s = SkipDigits(s);
}
if (*s == '.')
{
++s;
s = SkipDigits(s);
}
if (*s == 'e' || *s == 'E')
{
// Float exponent
const char* exponent = s;
++s;
if (*s == '+' || *s == '-') // sign
++s;
const char* first_non_digit = SkipDigits(s);
if (first_non_digit == s)
{
pp.Diag(pp.AdvanceToTokenCharacter(loc, exponent-str.begin()),
diag::err_exponent_has_no_digits);
m_had_error = true;
return;
}
s = first_non_digit;
}
}
// Report an error if there are any.
if (s != m_digits_end)
{
pp.Diag(pp.AdvanceToTokenCharacter(loc, s-str.begin()),
m_is_float ? diag::err_invalid_suffix_float_constant :
diag::err_invalid_suffix_integer_constant)
<< std::string(s, str.end());
m_had_error = true;
return;
}
}
/// EvaluateHasIncludeCommon - Process a '__has_include("path")'
/// or '__has_include_next("path")' expression.
/// Returns true if successful.
static bool EvaluateHasIncludeCommon(bool &Result, Token &Tok,
IdentifierInfo *II, Preprocessor &PP,
const DirectoryLookup *LookupFrom) {
SourceLocation LParenLoc;
// Get '('.
PP.LexNonComment(Tok);
// Ensure we have a '('.
if (Tok.isNot(tok::l_paren)) {
PP.Diag(Tok.getLocation(), diag::err_pp_missing_lparen) << II->getName();
return false;
}
// Save '(' location for possible missing ')' message.
LParenLoc = Tok.getLocation();
// Get the file name.
PP.getCurrentLexer()->LexIncludeFilename(Tok);
// Reserve a buffer to get the spelling.
llvm::SmallString<128> FilenameBuffer;
llvm::StringRef Filename;
switch (Tok.getKind()) {
case tok::eom:
// If the token kind is EOM, the error has already been diagnosed.
return false;
case tok::angle_string_literal:
case tok::string_literal: {
FilenameBuffer.resize(Tok.getLength());
const char *FilenameStart = &FilenameBuffer[0];
unsigned Len = PP.getSpelling(Tok, FilenameStart);
Filename = llvm::StringRef(FilenameStart, Len);
break;
}
case tok::less:
// This could be a <foo/bar.h> file coming from a macro expansion. In this
// case, glue the tokens together into FilenameBuffer and interpret those.
FilenameBuffer.push_back('<');
if (PP.ConcatenateIncludeName(FilenameBuffer))
return false; // Found <eom> but no ">"? Diagnostic already emitted.
Filename = FilenameBuffer.str();
break;
default:
PP.Diag(Tok.getLocation(), diag::err_pp_expects_filename);
return false;
}
bool isAngled = PP.GetIncludeFilenameSpelling(Tok.getLocation(), Filename);
// If GetIncludeFilenameSpelling set the start ptr to null, there was an
// error.
if (Filename.empty())
return false;
// Search include directories.
const DirectoryLookup *CurDir;
const FileEntry *File = PP.LookupFile(Filename, isAngled, LookupFrom, CurDir);
// Get the result value. Result = true means the file exists.
Result = File != 0;
// Get ')'.
PP.LexNonComment(Tok);
// Ensure we have a trailing ).
if (Tok.isNot(tok::r_paren)) {
PP.Diag(Tok.getLocation(), diag::err_pp_missing_rparen) << II->getName();
PP.Diag(LParenLoc, diag::note_matching) << "(";
return false;
}
return true;
}
/// StringifyArgument - Implement C99 6.10.3.2p2, converting a sequence of
/// tokens into the literal string token that should be produced by the C #
/// preprocessor operator. If Charify is true, then it should be turned into
/// a character literal for the Microsoft charize (#@) extension.
///
Token MacroArgs::StringifyArgument(const Token *ArgToks,
Preprocessor &PP, bool Charify) {
Token Tok;
Tok.startToken();
Tok.setKind(Charify ? tok::char_constant : tok::string_literal);
const Token *ArgTokStart = ArgToks;
// Stringify all the tokens.
llvm::SmallString<128> Result;
Result += "\"";
bool isFirst = true;
for (; ArgToks->isNot(tok::eof); ++ArgToks) {
const Token &Tok = *ArgToks;
if (!isFirst && (Tok.hasLeadingSpace() || Tok.isAtStartOfLine()))
Result += ' ';
isFirst = false;
// If this is a string or character constant, escape the token as specified
// by 6.10.3.2p2.
if (Tok.is(tok::string_literal) || // "foo"
Tok.is(tok::wide_string_literal) || // L"foo"
Tok.is(tok::char_constant)) { // 'x' and L'x'.
std::string Str = Lexer::Stringify(PP.getSpelling(Tok));
Result.append(Str.begin(), Str.end());
} else {
// Otherwise, just append the token. Do some gymnastics to get the token
// in place and avoid copies where possible.
unsigned CurStrLen = Result.size();
Result.resize(CurStrLen+Tok.getLength());
const char *BufPtr = &Result[CurStrLen];
unsigned ActualTokLen = PP.getSpelling(Tok, BufPtr);
// If getSpelling returned a pointer to an already uniqued version of the
// string instead of filling in BufPtr, memcpy it onto our string.
if (BufPtr != &Result[CurStrLen])
memcpy(&Result[CurStrLen], BufPtr, ActualTokLen);
// If the token was dirty, the spelling may be shorter than the token.
if (ActualTokLen != Tok.getLength())
Result.resize(CurStrLen+ActualTokLen);
}
}
// If the last character of the string is a \, and if it isn't escaped, this
// is an invalid string literal, diagnose it as specified in C99.
if (Result.back() == '\\') {
// Count the number of consequtive \ characters. If even, then they are
// just escaped backslashes, otherwise it's an error.
unsigned FirstNonSlash = Result.size()-2;
// Guaranteed to find the starting " if nothing else.
while (Result[FirstNonSlash] == '\\')
--FirstNonSlash;
if ((Result.size()-1-FirstNonSlash) & 1) {
// Diagnose errors for things like: #define F(X) #X / F(\)
PP.Diag(ArgToks[-1], diag::pp_invalid_string_literal);
Result.pop_back(); // remove one of the \'s.
}
}
Result += '"';
// If this is the charify operation and the result is not a legal character
// constant, diagnose it.
if (Charify) {
// First step, turn double quotes into single quotes:
Result[0] = '\'';
Result[Result.size()-1] = '\'';
// Check for bogus character.
bool isBad = false;
if (Result.size() == 3)
isBad = Result[1] == '\''; // ''' is not legal. '\' already fixed above.
else
isBad = (Result.size() != 4 || Result[1] != '\\'); // Not '\x'
if (isBad) {
PP.Diag(ArgTokStart[0], diag::err_invalid_character_to_charify);
Result = "' '"; // Use something arbitrary, but legal.
}
}
PP.CreateString(&Result[0], Result.size(), Tok);
return Tok;
}
// #pragma unused(identifier)
void PragmaUnusedHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &UnusedTok) {
// FIXME: Should we be expanding macros here? My guess is no.
SourceLocation UnusedLoc = UnusedTok.getLocation();
// Lex the left '('.
Token Tok;
PP.Lex(Tok);
if (Tok.isNot(tok::l_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_lparen) << "unused";
return;
}
// Lex the declaration reference(s).
SmallVector<Token, 5> Identifiers;
SourceLocation RParenLoc;
bool LexID = true;
while (true) {
PP.Lex(Tok);
if (LexID) {
if (Tok.is(tok::identifier)) {
Identifiers.push_back(Tok);
LexID = false;
continue;
}
// Illegal token!
PP.Diag(Tok.getLocation(), diag::warn_pragma_unused_expected_var);
return;
}
// We are execting a ')' or a ','.
if (Tok.is(tok::comma)) {
LexID = true;
continue;
}
if (Tok.is(tok::r_paren)) {
RParenLoc = Tok.getLocation();
break;
}
// Illegal token!
PP.Diag(Tok.getLocation(), diag::warn_pragma_unused_expected_punc);
return;
}
PP.Lex(Tok);
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol) <<
"unused";
return;
}
// Verify that we have a location for the right parenthesis.
assert(RParenLoc.isValid() && "Valid '#pragma unused' must have ')'");
assert(!Identifiers.empty() && "Valid '#pragma unused' must have arguments");
// For each identifier token, insert into the token stream a
// annot_pragma_unused token followed by the identifier token.
// This allows us to cache a "#pragma unused" that occurs inside an inline
// C++ member function.
Token *Toks = new Token[2*Identifiers.size()];
for (unsigned i=0; i != Identifiers.size(); i++) {
Token &pragmaUnusedTok = Toks[2*i], &idTok = Toks[2*i+1];
pragmaUnusedTok.startToken();
pragmaUnusedTok.setKind(tok::annot_pragma_unused);
pragmaUnusedTok.setLocation(UnusedLoc);
idTok = Identifiers[i];
}
PP.EnterTokenStream(Toks, 2*Identifiers.size(), /*DisableMacroExpansion=*/true, /*OwnsTokens=*/true);
}
// #pragma pack(...) comes in the following delicious flavors:
// pack '(' [integer] ')'
// pack '(' 'show' ')'
// pack '(' ('push' | 'pop') [',' identifier] [, integer] ')'
void PragmaPackHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &PackTok) {
SourceLocation PackLoc = PackTok.getLocation();
Token Tok;
PP.Lex(Tok);
if (Tok.isNot(tok::l_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_lparen) << "pack";
return;
}
Sema::PragmaPackKind Kind = Sema::PPK_Default;
IdentifierInfo *Name = 0;
ExprResult Alignment;
SourceLocation LParenLoc = Tok.getLocation();
PP.Lex(Tok);
if (Tok.is(tok::numeric_constant)) {
Alignment = Actions.ActOnNumericConstant(Tok);
if (Alignment.isInvalid())
return;
PP.Lex(Tok);
// In MSVC/gcc, #pragma pack(4) sets the alignment without affecting
// the push/pop stack.
// In Apple gcc, #pragma pack(4) is equivalent to #pragma pack(push, 4)
if (PP.getLangOptions().ApplePragmaPack)
Kind = Sema::PPK_Push;
} else if (Tok.is(tok::identifier)) {
const IdentifierInfo *II = Tok.getIdentifierInfo();
if (II->isStr("show")) {
Kind = Sema::PPK_Show;
PP.Lex(Tok);
} else {
if (II->isStr("push")) {
Kind = Sema::PPK_Push;
} else if (II->isStr("pop")) {
Kind = Sema::PPK_Pop;
} else {
PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_invalid_action);
return;
}
PP.Lex(Tok);
if (Tok.is(tok::comma)) {
PP.Lex(Tok);
if (Tok.is(tok::numeric_constant)) {
Alignment = Actions.ActOnNumericConstant(Tok);
if (Alignment.isInvalid())
return;
PP.Lex(Tok);
} else if (Tok.is(tok::identifier)) {
Name = Tok.getIdentifierInfo();
PP.Lex(Tok);
if (Tok.is(tok::comma)) {
PP.Lex(Tok);
if (Tok.isNot(tok::numeric_constant)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_malformed);
return;
}
Alignment = Actions.ActOnNumericConstant(Tok);
if (Alignment.isInvalid())
return;
PP.Lex(Tok);
}
} else {
PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_malformed);
return;
}
}
}
} else if (PP.getLangOptions().ApplePragmaPack) {
// In MSVC/gcc, #pragma pack() resets the alignment without affecting
// the push/pop stack.
// In Apple gcc #pragma pack() is equivalent to #pragma pack(pop).
Kind = Sema::PPK_Pop;
}
if (Tok.isNot(tok::r_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_rparen) << "pack";
return;
}
SourceLocation RParenLoc = Tok.getLocation();
PP.Lex(Tok);
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol) << "pack";
return;
}
Actions.ActOnPragmaPack(Kind, Name, Alignment.release(), PackLoc,
LParenLoc, RParenLoc);
}
/// EvaluateDefined - Process a 'defined(sym)' expression.
static bool EvaluateDefined(PPValue &Result, Token &PeekTok, DefinedTracker &DT,
bool ValueLive, Preprocessor &PP) {
IdentifierInfo *II;
Result.setBegin(PeekTok.getLocation());
// Get the next token, don't expand it.
PP.LexUnexpandedNonComment(PeekTok);
// Two options, it can either be a pp-identifier or a (.
SourceLocation LParenLoc;
if (PeekTok.is(tok::l_paren)) {
// Found a paren, remember we saw it and skip it.
LParenLoc = PeekTok.getLocation();
PP.LexUnexpandedNonComment(PeekTok);
}
if (PeekTok.is(tok::code_completion)) {
if (PP.getCodeCompletionHandler())
PP.getCodeCompletionHandler()->CodeCompleteMacroName(false);
PP.setCodeCompletionReached();
PP.LexUnexpandedNonComment(PeekTok);
}
// If we don't have a pp-identifier now, this is an error.
if ((II = PeekTok.getIdentifierInfo()) == 0) {
PP.Diag(PeekTok, diag::err_pp_defined_requires_identifier);
return true;
}
// Otherwise, we got an identifier, is it defined to something?
Result.Val = II->hasMacroDefinition();
Result.Val.setIsUnsigned(false); // Result is signed intmax_t.
MacroDirective *Macro = 0;
// If there is a macro, mark it used.
if (Result.Val != 0 && ValueLive) {
Macro = PP.getMacroDirective(II);
PP.markMacroAsUsed(Macro->getMacroInfo());
}
// Invoke the 'defined' callback.
if (PPCallbacks *Callbacks = PP.getPPCallbacks()) {
MacroDirective *MD = Macro;
// Pass the MacroInfo for the macro name even if the value is dead.
if (!MD && Result.Val != 0)
MD = PP.getMacroDirective(II);
Callbacks->Defined(PeekTok, MD);
}
// If we are in parens, ensure we have a trailing ).
if (LParenLoc.isValid()) {
// Consume identifier.
Result.setEnd(PeekTok.getLocation());
PP.LexUnexpandedNonComment(PeekTok);
if (PeekTok.isNot(tok::r_paren)) {
PP.Diag(PeekTok.getLocation(), diag::err_pp_missing_rparen) << "defined";
PP.Diag(LParenLoc, diag::note_matching) << "(";
return true;
}
// Consume the ).
Result.setEnd(PeekTok.getLocation());
PP.LexNonComment(PeekTok);
} else {
// Consume identifier.
Result.setEnd(PeekTok.getLocation());
PP.LexNonComment(PeekTok);
}
// Success, remember that we saw defined(X).
DT.State = DefinedTracker::DefinedMacro;
DT.TheMacro = II;
return false;
}
/// EvaluateDefined - Process a 'defined(sym)' expression.
static bool EvaluateDefined(PPValue &Result, Token &PeekTok, DefinedTracker &DT,
bool ValueLive, Preprocessor &PP) {
SourceLocation beginLoc(PeekTok.getLocation());
Result.setBegin(beginLoc);
// Get the next token, don't expand it.
PP.LexUnexpandedNonComment(PeekTok);
// Two options, it can either be a pp-identifier or a (.
SourceLocation LParenLoc;
if (PeekTok.is(tok::l_paren)) {
// Found a paren, remember we saw it and skip it.
LParenLoc = PeekTok.getLocation();
PP.LexUnexpandedNonComment(PeekTok);
}
if (PeekTok.is(tok::code_completion)) {
if (PP.getCodeCompletionHandler())
PP.getCodeCompletionHandler()->CodeCompleteMacroName(false);
PP.setCodeCompletionReached();
PP.LexUnexpandedNonComment(PeekTok);
}
// If we don't have a pp-identifier now, this is an error.
if (PP.CheckMacroName(PeekTok, MU_Other))
return true;
// Otherwise, we got an identifier, is it defined to something?
IdentifierInfo *II = PeekTok.getIdentifierInfo();
MacroDefinition Macro = PP.getMacroDefinition(II);
Result.Val = !!Macro;
Result.Val.setIsUnsigned(false); // Result is signed intmax_t.
// If there is a macro, mark it used.
if (Result.Val != 0 && ValueLive)
PP.markMacroAsUsed(Macro.getMacroInfo());
// Save macro token for callback.
Token macroToken(PeekTok);
// If we are in parens, ensure we have a trailing ).
if (LParenLoc.isValid()) {
// Consume identifier.
Result.setEnd(PeekTok.getLocation());
PP.LexUnexpandedNonComment(PeekTok);
if (PeekTok.isNot(tok::r_paren)) {
PP.Diag(PeekTok.getLocation(), diag::err_pp_expected_after)
<< "'defined'" << tok::r_paren;
PP.Diag(LParenLoc, diag::note_matching) << tok::l_paren;
return true;
}
// Consume the ).
Result.setEnd(PeekTok.getLocation());
PP.LexNonComment(PeekTok);
} else {
// Consume identifier.
Result.setEnd(PeekTok.getLocation());
PP.LexNonComment(PeekTok);
}
// Invoke the 'defined' callback.
if (PPCallbacks *Callbacks = PP.getPPCallbacks()) {
Callbacks->Defined(macroToken, Macro,
SourceRange(beginLoc, PeekTok.getLocation()));
}
// Success, remember that we saw defined(X).
DT.State = DefinedTracker::DefinedMacro;
DT.TheMacro = II;
return false;
}
/// ParseNumberStartingWithZero - This method is called when the first character
/// of the number is found to be a zero. This means it is either an octal
/// number (like '04') or a hex number ('0x123a') a binary number ('0b1010') or
/// a floating point number (01239.123e4). Eat the prefix, determining the
/// radix etc.
void NumericLiteralParser::ParseNumberStartingWithZero(SourceLocation TokLoc) {
assert(s[0] == '0' && "Invalid method call");
s++;
int c1 = s[0];
// Handle a hex number like 0x1234.
if ((c1 == 'x' || c1 == 'X') && (isHexDigit(s[1]) || s[1] == '.')) {
s++;
assert(s < ThisTokEnd && "didn't maximally munch?");
radix = 16;
DigitsBegin = s;
s = SkipHexDigits(s);
bool noSignificand = (s == DigitsBegin);
if (s == ThisTokEnd) {
// Done.
} else if (*s == '.') {
s++;
saw_period = true;
const char *floatDigitsBegin = s;
checkSeparator(TokLoc, s, CSK_BeforeDigits);
s = SkipHexDigits(s);
noSignificand &= (floatDigitsBegin == s);
}
if (noSignificand) {
PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s - ThisTokBegin),
diag::err_hexconstant_requires_digits);
hadError = true;
return;
}
// A binary exponent can appear with or with a '.'. If dotted, the
// binary exponent is required.
if (*s == 'p' || *s == 'P') {
checkSeparator(TokLoc, s, CSK_AfterDigits);
const char *Exponent = s;
s++;
saw_exponent = true;
if (*s == '+' || *s == '-') s++; // sign
const char *first_non_digit = SkipDigits(s);
if (first_non_digit == s) {
PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-ThisTokBegin),
diag::err_exponent_has_no_digits);
hadError = true;
return;
}
checkSeparator(TokLoc, s, CSK_BeforeDigits);
s = first_non_digit;
if (!PP.getLangOpts().HexFloats)
PP.Diag(TokLoc, diag::ext_hexconstant_invalid);
} else if (saw_period) {
PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin),
diag::err_hexconstant_requires_exponent);
hadError = true;
}
return;
}
// Handle simple binary numbers 0b01010
if ((c1 == 'b' || c1 == 'B') && (s[1] == '0' || s[1] == '1')) {
// 0b101010 is a C++1y / GCC extension.
PP.Diag(TokLoc,
PP.getLangOpts().CPlusPlus14
? diag::warn_cxx11_compat_binary_literal
: PP.getLangOpts().CPlusPlus
? diag::ext_binary_literal_cxx14
: diag::ext_binary_literal);
++s;
assert(s < ThisTokEnd && "didn't maximally munch?");
radix = 2;
DigitsBegin = s;
s = SkipBinaryDigits(s);
if (s == ThisTokEnd) {
// Done.
} else if (isHexDigit(*s)) {
PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin),
diag::err_invalid_binary_digit) << StringRef(s, 1);
hadError = true;
}
// Other suffixes will be diagnosed by the caller.
return;
}
// For now, the radix is set to 8. If we discover that we have a
// floating point constant, the radix will change to 10. Octal floating
// point constants are not permitted (only decimal and hexadecimal).
radix = 8;
DigitsBegin = s;
s = SkipOctalDigits(s);
if (s == ThisTokEnd)
return; // Done, simple octal number like 01234
// If we have some other non-octal digit that *is* a decimal digit, see if
// this is part of a floating point number like 094.123 or 09e1.
if (isDigit(*s)) {
const char *EndDecimal = SkipDigits(s);
if (EndDecimal[0] == '.' || EndDecimal[0] == 'e' || EndDecimal[0] == 'E') {
s = EndDecimal;
radix = 10;
}
}
// If we have a hex digit other than 'e' (which denotes a FP exponent) then
// the code is using an incorrect base.
if (isHexDigit(*s) && *s != 'e' && *s != 'E') {
PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin),
diag::err_invalid_octal_digit) << StringRef(s, 1);
hadError = true;
return;
}
if (*s == '.') {
s++;
radix = 10;
saw_period = true;
checkSeparator(TokLoc, s, CSK_BeforeDigits);
s = SkipDigits(s); // Skip suffix.
}
if (*s == 'e' || *s == 'E') { // exponent
checkSeparator(TokLoc, s, CSK_AfterDigits);
const char *Exponent = s;
s++;
radix = 10;
saw_exponent = true;
if (*s == '+' || *s == '-') s++; // sign
const char *first_non_digit = SkipDigits(s);
if (first_non_digit != s) {
checkSeparator(TokLoc, s, CSK_BeforeDigits);
s = first_non_digit;
} else {
PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-ThisTokBegin),
diag::err_exponent_has_no_digits);
hadError = true;
return;
}
}
}
/// 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().CPlusPlus11 ?
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::err_integer_literal_too_large)
<< /* Unsigned */ 1;
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()) {
// Octal, hexadecimal, and binary literals are implicitly unsigned if
// the value does not fit into a signed integer type.
if (ValueLive && Literal.getRadix() == 10)
PP.Diag(PeekTok, diag::ext_integer_literal_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::utf8_char_constant: // u8'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.isWide())
Val.setIsUnsigned(!TargetInfo::isTypeSigned(TI.getWCharType()));
else 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) << tok::l_paren;
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
}
}
// #pragma unused(identifier)
void PragmaUnusedHandler::HandlePragma(Preprocessor &PP, Token &UnusedTok) {
// FIXME: Should we be expanding macros here? My guess is no.
SourceLocation UnusedLoc = UnusedTok.getLocation();
// Lex the left '('.
Token Tok;
PP.Lex(Tok);
if (Tok.isNot(tok::l_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_lparen) << "unused";
return;
}
SourceLocation LParenLoc = Tok.getLocation();
// Lex the declaration reference(s).
llvm::SmallVector<Action::ExprTy*, 5> Ex;
SourceLocation RParenLoc;
bool LexID = true;
while (true) {
PP.Lex(Tok);
if (LexID) {
if (Tok.is(tok::identifier)) {
Action::OwningExprResult Name =
Actions.ActOnIdentifierExpr(parser.CurScope, Tok.getLocation(),
*Tok.getIdentifierInfo(), false);
if (Name.isInvalid()) {
if (!Ex.empty())
Action::MultiExprArg Release(Actions, &Ex[0], Ex.size());
return;
}
Ex.push_back(Name.release());
LexID = false;
continue;
}
// Illegal token! Release the parsed expressions (if any) and emit
// a warning.
if (!Ex.empty())
Action::MultiExprArg Release(Actions, &Ex[0], Ex.size());
PP.Diag(Tok.getLocation(), diag::warn_pragma_unused_expected_var);
return;
}
// We are execting a ')' or a ','.
if (Tok.is(tok::comma)) {
LexID = true;
continue;
}
if (Tok.is(tok::r_paren)) {
RParenLoc = Tok.getLocation();
break;
}
// Illegal token! Release the parsed expressions (if any) and emit
// a warning.
if (!Ex.empty())
Action::MultiExprArg Release(Actions, &Ex[0], Ex.size());
PP.Diag(Tok.getLocation(), diag::warn_pragma_unused_expected_punc);
return;
}
// Verify that we have a location for the right parenthesis.
assert(RParenLoc.isValid() && "Valid '#pragma unused' must have ')'");
assert(!Ex.empty() && "Valid '#pragma unused' must have arguments");
// Perform the action to handle the pragma.
Actions.ActOnPragmaUnused(&Ex[0], Ex.size(), UnusedLoc, LParenLoc, RParenLoc);
}
/// integer-constant: [C99 6.4.4.1]
/// decimal-constant integer-suffix
/// octal-constant integer-suffix
/// hexadecimal-constant integer-suffix
/// binary-literal integer-suffix [GNU, C++1y]
/// user-defined-integer-literal: [C++11 lex.ext]
/// decimal-literal ud-suffix
/// octal-literal ud-suffix
/// hexadecimal-literal ud-suffix
/// binary-literal ud-suffix [GNU, C++1y]
/// decimal-constant:
/// nonzero-digit
/// decimal-constant digit
/// octal-constant:
/// 0
/// octal-constant octal-digit
/// hexadecimal-constant:
/// hexadecimal-prefix hexadecimal-digit
/// hexadecimal-constant hexadecimal-digit
/// hexadecimal-prefix: one of
/// 0x 0X
/// binary-literal:
/// 0b binary-digit
/// 0B binary-digit
/// binary-literal binary-digit
/// integer-suffix:
/// unsigned-suffix [long-suffix]
/// unsigned-suffix [long-long-suffix]
/// long-suffix [unsigned-suffix]
/// long-long-suffix [unsigned-sufix]
/// nonzero-digit:
/// 1 2 3 4 5 6 7 8 9
/// octal-digit:
/// 0 1 2 3 4 5 6 7
/// hexadecimal-digit:
/// 0 1 2 3 4 5 6 7 8 9
/// a b c d e f
/// A B C D E F
/// binary-digit:
/// 0
/// 1
/// unsigned-suffix: one of
/// u U
/// long-suffix: one of
/// l L
/// long-long-suffix: one of
/// ll LL
///
/// floating-constant: [C99 6.4.4.2]
/// TODO: add rules...
///
NumericLiteralParser::NumericLiteralParser(StringRef TokSpelling)
: ThisTokBegin(TokSpelling.begin()), ThisTokEnd(TokSpelling.end()) {
// This routine assumes that the range begin/end matches the regex for integer
// and FP constants (specifically, the 'pp-number' regex), and assumes that
// the byte at "*end" is both valid and not part of the regex. Because of
// this, it doesn't have to check for 'overscan' in various places.
assert(!isPreprocessingNumberBody(*ThisTokEnd) && "didn't maximally munch?");
s = DigitsBegin = ThisTokBegin;
saw_exponent = false;
saw_period = false;
saw_ud_suffix = false;
isLong = false;
isUnsigned = false;
isLongLong = false;
isFloat = false;
isImaginary = false;
MicrosoftInteger = 0;
hadError = false;
SourceLocation TokLoc;
if (*s == '0') { // parse radix
ParseNumberStartingWithZero(TokLoc);
if (hadError)
return;
} else { // the first digit is non-zero
radix = 10;
s = SkipDigits(s);
if (s == ThisTokEnd) {
// Done.
} else if (isHexDigit(*s) && !(*s == 'e' || *s == 'E')) {
PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s - ThisTokBegin),
diag::err_invalid_decimal_digit) << StringRef(s, 1);
hadError = true;
return;
} else if (*s == '.') {
checkSeparator(TokLoc, s, CSK_AfterDigits);
s++;
saw_period = true;
checkSeparator(TokLoc, s, CSK_BeforeDigits);
s = SkipDigits(s);
}
if ((*s == 'e' || *s == 'E')) { // exponent
checkSeparator(TokLoc, s, CSK_AfterDigits);
const char *Exponent = s;
s++;
saw_exponent = true;
if (*s == '+' || *s == '-') s++; // sign
checkSeparator(TokLoc, s, CSK_BeforeDigits);
const char *first_non_digit = SkipDigits(s);
if (first_non_digit != s) {
s = first_non_digit;
} else {
PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent - ThisTokBegin),
diag::err_exponent_has_no_digits);
hadError = true;
return;
}
}
}
SuffixBegin = s;
checkSeparator(TokLoc, s, CSK_AfterDigits);
// Parse the suffix. At this point we can classify whether we have an FP or
// integer constant.
bool isFPConstant = isFloatingLiteral();
const char *ImaginarySuffixLoc = nullptr;
// Loop over all of the characters of the suffix. If we see something bad,
// we break out of the loop.
for (; s != ThisTokEnd; ++s) {
switch (*s) {
case 'f': // FP Suffix for "float"
case 'F':
if (!isFPConstant) break; // Error for integer constant.
if (isFloat || isLong) break; // FF, LF invalid.
isFloat = true;
continue; // Success.
case 'u':
case 'U':
if (isFPConstant) break; // Error for floating constant.
if (isUnsigned) break; // Cannot be repeated.
isUnsigned = true;
continue; // Success.
case 'l':
case 'L':
if (isLong || isLongLong) break; // Cannot be repeated.
if (isFloat) break; // LF invalid.
// Check for long long. The L's need to be adjacent and the same case.
if (s[1] == s[0]) {
assert(s + 1 < ThisTokEnd && "didn't maximally munch?");
if (isFPConstant) break; // long long invalid for floats.
isLongLong = true;
++s; // Eat both of them.
} else {
isLong = true;
}
continue; // Success.
case 'i':
case 'I':
if (PP.getLangOpts().MicrosoftExt) {
if (isLong || isLongLong || MicrosoftInteger)
break;
if (!isFPConstant) {
// Allow i8, i16, i32, i64, and i128.
switch (s[1]) {
case '8':
s += 2; // i8 suffix
MicrosoftInteger = 8;
break;
case '1':
if (s[2] == '6') {
s += 3; // i16 suffix
MicrosoftInteger = 16;
} else if (s[2] == '2' && s[3] == '8') {
s += 4; // i128 suffix
MicrosoftInteger = 128;
}
break;
case '3':
if (s[2] == '2') {
s += 3; // i32 suffix
MicrosoftInteger = 32;
}
break;
case '6':
if (s[2] == '4') {
s += 3; // i64 suffix
MicrosoftInteger = 64;
}
break;
default:
break;
}
}
if (MicrosoftInteger) {
assert(s <= ThisTokEnd && "didn't maximally munch?");
break;
}
}
// "i", "if", and "il" are user-defined suffixes in C++1y.
if (*s == 'i' && PP.getLangOpts().CPlusPlus14)
break;
// fall through.
case 'j':
case 'J':
if (isImaginary) break; // Cannot be repeated.
isImaginary = true;
ImaginarySuffixLoc = s;
continue; // Success.
}
// If we reached here, there was an error or a ud-suffix.
break;
}
if (s != ThisTokEnd) {
// FIXME: Don't bother expanding UCNs if !tok.hasUCN().
expandUCNs(UDSuffixBuf, StringRef(SuffixBegin, ThisTokEnd - SuffixBegin));
if (isValidUDSuffix(PP.getLangOpts(), UDSuffixBuf)) {
// Any suffix pieces we might have parsed are actually part of the
// ud-suffix.
isLong = false;
isUnsigned = false;
isLongLong = false;
isFloat = false;
isImaginary = false;
MicrosoftInteger = 0;
saw_ud_suffix = true;
return;
}
// Report an error if there are any.
PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, SuffixBegin - ThisTokBegin),
isFPConstant ? diag::err_invalid_suffix_float_constant :
diag::err_invalid_suffix_integer_constant)
<< StringRef(SuffixBegin, ThisTokEnd-SuffixBegin);
hadError = true;
return;
}
if (isImaginary) {
PP.Diag(PP.AdvanceToTokenCharacter(TokLoc,
ImaginarySuffixLoc - ThisTokBegin),
diag::ext_imaginary_constant);
}
}
/// EvaluateDefined - Process a 'defined(sym)' expression.
static bool EvaluateDefined(PPValue &Result, Token &PeekTok, DefinedTracker &DT,
bool ValueLive, Preprocessor &PP) {
SourceLocation beginLoc(PeekTok.getLocation());
Result.setBegin(beginLoc);
// Get the next token, don't expand it.
PP.LexUnexpandedNonComment(PeekTok);
// Two options, it can either be a pp-identifier or a (.
SourceLocation LParenLoc;
if (PeekTok.is(tok::l_paren)) {
// Found a paren, remember we saw it and skip it.
LParenLoc = PeekTok.getLocation();
PP.LexUnexpandedNonComment(PeekTok);
}
if (PeekTok.is(tok::code_completion)) {
if (PP.getCodeCompletionHandler())
PP.getCodeCompletionHandler()->CodeCompleteMacroName(false);
PP.setCodeCompletionReached();
PP.LexUnexpandedNonComment(PeekTok);
}
// If we don't have a pp-identifier now, this is an error.
if (PP.CheckMacroName(PeekTok, MU_Other))
return true;
// Otherwise, we got an identifier, is it defined to something?
IdentifierInfo *II = PeekTok.getIdentifierInfo();
MacroDefinition Macro = PP.getMacroDefinition(II);
Result.Val = !!Macro;
Result.Val.setIsUnsigned(false); // Result is signed intmax_t.
// If there is a macro, mark it used.
if (Result.Val != 0 && ValueLive)
PP.markMacroAsUsed(Macro.getMacroInfo());
// Save macro token for callback.
Token macroToken(PeekTok);
// If we are in parens, ensure we have a trailing ).
if (LParenLoc.isValid()) {
// Consume identifier.
Result.setEnd(PeekTok.getLocation());
PP.LexUnexpandedNonComment(PeekTok);
if (PeekTok.isNot(tok::r_paren)) {
PP.Diag(PeekTok.getLocation(), diag::err_pp_expected_after)
<< "'defined'" << tok::r_paren;
PP.Diag(LParenLoc, diag::note_matching) << tok::l_paren;
return true;
}
// Consume the ).
Result.setEnd(PeekTok.getLocation());
PP.LexNonComment(PeekTok);
} else {
// Consume identifier.
Result.setEnd(PeekTok.getLocation());
PP.LexNonComment(PeekTok);
}
// [cpp.cond]p4:
// Prior to evaluation, macro invocations in the list of preprocessing
// tokens that will become the controlling constant expression are replaced
// (except for those macro names modified by the 'defined' unary operator),
// just as in normal text. If the token 'defined' is generated as a result
// of this replacement process or use of the 'defined' unary operator does
// not match one of the two specified forms prior to macro replacement, the
// behavior is undefined.
// This isn't an idle threat, consider this program:
// #define FOO
// #define BAR defined(FOO)
// #if BAR
// ...
// #else
// ...
// #endif
// clang and gcc will pick the #if branch while Visual Studio will take the
// #else branch. Emit a warning about this undefined behavior.
if (beginLoc.isMacroID()) {
bool IsFunctionTypeMacro =
PP.getSourceManager()
.getSLocEntry(PP.getSourceManager().getFileID(beginLoc))
.getExpansion()
.isFunctionMacroExpansion();
// For object-type macros, it's easy to replace
// #define FOO defined(BAR)
// with
// #if defined(BAR)
// #define FOO 1
// #else
// #define FOO 0
// #endif
// and doing so makes sense since compilers handle this differently in
// practice (see example further up). But for function-type macros,
// there is no good way to write
// # define FOO(x) (defined(M_ ## x) && M_ ## x)
// in a different way, and compilers seem to agree on how to behave here.
// So warn by default on object-type macros, but only warn in -pedantic
// mode on function-type macros.
if (IsFunctionTypeMacro)
PP.Diag(beginLoc, diag::warn_defined_in_function_type_macro);
else
PP.Diag(beginLoc, diag::warn_defined_in_object_type_macro);
}
// Invoke the 'defined' callback.
if (PPCallbacks *Callbacks = PP.getPPCallbacks()) {
Callbacks->Defined(macroToken, Macro,
SourceRange(beginLoc, PeekTok.getLocation()));
}
// Success, remember that we saw defined(X).
DT.State = DefinedTracker::DefinedMacro;
DT.TheMacro = II;
return false;
}
// #pragma 'align' '=' {'native','natural','mac68k','power','reset'}
// #pragma 'options 'align' '=' {'native','natural','mac68k','power','reset'}
static void ParseAlignPragma(Preprocessor &PP, Token &FirstTok,
bool IsOptions) {
Token Tok;
if (IsOptions) {
PP.Lex(Tok);
if (Tok.isNot(tok::identifier) ||
!Tok.getIdentifierInfo()->isStr("align")) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_options_expected_align);
return;
}
}
PP.Lex(Tok);
if (Tok.isNot(tok::equal)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_align_expected_equal)
<< IsOptions;
return;
}
PP.Lex(Tok);
if (Tok.isNot(tok::identifier)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_identifier)
<< (IsOptions ? "options" : "align");
return;
}
Sema::PragmaOptionsAlignKind Kind = Sema::POAK_Natural;
const IdentifierInfo *II = Tok.getIdentifierInfo();
if (II->isStr("native"))
Kind = Sema::POAK_Native;
else if (II->isStr("natural"))
Kind = Sema::POAK_Natural;
else if (II->isStr("packed"))
Kind = Sema::POAK_Packed;
else if (II->isStr("power"))
Kind = Sema::POAK_Power;
else if (II->isStr("mac68k"))
Kind = Sema::POAK_Mac68k;
else if (II->isStr("reset"))
Kind = Sema::POAK_Reset;
else {
PP.Diag(Tok.getLocation(), diag::warn_pragma_align_invalid_option)
<< IsOptions;
return;
}
PP.Lex(Tok);
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol)
<< (IsOptions ? "options" : "align");
return;
}
Token *Toks =
(Token*) PP.getPreprocessorAllocator().Allocate(
sizeof(Token) * 1, llvm::alignOf<Token>());
new (Toks) Token();
Toks[0].startToken();
Toks[0].setKind(tok::annot_pragma_align);
Toks[0].setLocation(FirstTok.getLocation());
Toks[0].setAnnotationValue(reinterpret_cast<void*>(
static_cast<uintptr_t>(Kind)));
PP.EnterTokenStream(Toks, 1, /*DisableMacroExpansion=*/true,
/*OwnsTokens=*/false);
}
// #pragma pack(...) comes in the following delicious flavors:
// pack '(' [integer] ')'
// pack '(' 'show' ')'
// pack '(' ('push' | 'pop') [',' identifier] [, integer] ')'
void PragmaPackHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &PackTok) {
SourceLocation PackLoc = PackTok.getLocation();
Token Tok;
PP.Lex(Tok);
if (Tok.isNot(tok::l_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_lparen) << "pack";
return;
}
Sema::PragmaPackKind Kind = Sema::PPK_Default;
IdentifierInfo *Name = 0;
Token Alignment;
Alignment.startToken();
SourceLocation LParenLoc = Tok.getLocation();
PP.Lex(Tok);
if (Tok.is(tok::numeric_constant)) {
Alignment = Tok;
PP.Lex(Tok);
// In MSVC/gcc, #pragma pack(4) sets the alignment without affecting
// the push/pop stack.
// In Apple gcc, #pragma pack(4) is equivalent to #pragma pack(push, 4)
if (PP.getLangOpts().ApplePragmaPack)
Kind = Sema::PPK_Push;
} else if (Tok.is(tok::identifier)) {
const IdentifierInfo *II = Tok.getIdentifierInfo();
if (II->isStr("show")) {
Kind = Sema::PPK_Show;
PP.Lex(Tok);
} else {
if (II->isStr("push")) {
Kind = Sema::PPK_Push;
} else if (II->isStr("pop")) {
Kind = Sema::PPK_Pop;
} else {
PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_invalid_action);
return;
}
PP.Lex(Tok);
if (Tok.is(tok::comma)) {
PP.Lex(Tok);
if (Tok.is(tok::numeric_constant)) {
Alignment = Tok;
PP.Lex(Tok);
} else if (Tok.is(tok::identifier)) {
Name = Tok.getIdentifierInfo();
PP.Lex(Tok);
if (Tok.is(tok::comma)) {
PP.Lex(Tok);
if (Tok.isNot(tok::numeric_constant)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_malformed);
return;
}
Alignment = Tok;
PP.Lex(Tok);
}
} else {
PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_malformed);
return;
}
}
}
} else if (PP.getLangOpts().ApplePragmaPack) {
// In MSVC/gcc, #pragma pack() resets the alignment without affecting
// the push/pop stack.
// In Apple gcc #pragma pack() is equivalent to #pragma pack(pop).
Kind = Sema::PPK_Pop;
}
if (Tok.isNot(tok::r_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_rparen) << "pack";
return;
}
SourceLocation RParenLoc = Tok.getLocation();
PP.Lex(Tok);
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol) << "pack";
return;
}
PragmaPackInfo *Info =
(PragmaPackInfo*) PP.getPreprocessorAllocator().Allocate(
sizeof(PragmaPackInfo), llvm::alignOf<PragmaPackInfo>());
new (Info) PragmaPackInfo();
Info->Kind = Kind;
Info->Name = Name;
Info->Alignment = Alignment;
Info->LParenLoc = LParenLoc;
Info->RParenLoc = RParenLoc;
Token *Toks =
(Token*) PP.getPreprocessorAllocator().Allocate(
sizeof(Token) * 1, llvm::alignOf<Token>());
new (Toks) Token();
Toks[0].startToken();
Toks[0].setKind(tok::annot_pragma_pack);
Toks[0].setLocation(PackLoc);
Toks[0].setAnnotationValue(static_cast<void*>(Info));
PP.EnterTokenStream(Toks, 1, /*DisableMacroExpansion=*/true,
/*OwnsTokens=*/false);
}
// #pragma unused(identifier)
void PragmaUnusedHandler::HandlePragma(Preprocessor &PP, Token &UnusedTok) {
// FIXME: Should we be expanding macros here? My guess is no.
SourceLocation UnusedLoc = UnusedTok.getLocation();
// Lex the left '('.
Token Tok;
PP.Lex(Tok);
if (Tok.isNot(tok::l_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_lparen) << "unused";
return;
}
SourceLocation LParenLoc = Tok.getLocation();
// Lex the declaration reference(s).
llvm::SmallVector<Token, 5> Identifiers;
SourceLocation RParenLoc;
bool LexID = true;
while (true) {
PP.Lex(Tok);
if (LexID) {
if (Tok.is(tok::identifier)) {
Identifiers.push_back(Tok);
LexID = false;
continue;
}
// Illegal token!
PP.Diag(Tok.getLocation(), diag::warn_pragma_unused_expected_var);
return;
}
// We are execting a ')' or a ','.
if (Tok.is(tok::comma)) {
LexID = true;
continue;
}
if (Tok.is(tok::r_paren)) {
RParenLoc = Tok.getLocation();
break;
}
// Illegal token!
PP.Diag(Tok.getLocation(), diag::warn_pragma_unused_expected_punc);
return;
}
PP.Lex(Tok);
if (Tok.isNot(tok::eom)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol) <<
"unused";
return;
}
// Verify that we have a location for the right parenthesis.
assert(RParenLoc.isValid() && "Valid '#pragma unused' must have ')'");
assert(!Identifiers.empty() && "Valid '#pragma unused' must have arguments");
// Perform the action to handle the pragma.
Actions.ActOnPragmaUnused(Identifiers.data(), Identifiers.size(),
parser.CurScope, UnusedLoc, LParenLoc, RParenLoc);
}
/// EvaluateDirectiveSubExpr - Evaluate the subexpression whose first token is
/// PeekTok, and whose precedence is PeekPrec. This returns the result in LHS.
///
/// 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, such as division by zero warnings.
static bool EvaluateDirectiveSubExpr(PPValue &LHS, unsigned MinPrec,
Token &PeekTok, bool ValueLive,
Preprocessor &PP) {
unsigned PeekPrec = getPrecedence(PeekTok.getKind());
// If this token isn't valid, report the error.
if (PeekPrec == ~0U) {
PP.Diag(PeekTok.getLocation(), diag::err_pp_expr_bad_token_binop)
<< LHS.getRange();
return true;
}
while (1) {
// If this token has a lower precedence than we are allowed to parse, return
// it so that higher levels of the recursion can parse it.
if (PeekPrec < MinPrec)
return false;
tok::TokenKind Operator = PeekTok.getKind();
// If this is a short-circuiting operator, see if the RHS of the operator is
// dead. Note that this cannot just clobber ValueLive. Consider
// "0 && 1 ? 4 : 1 / 0", which is parsed as "(0 && 1) ? 4 : (1 / 0)". In
// this example, the RHS of the && being dead does not make the rest of the
// expr dead.
bool RHSIsLive;
if (Operator == tok::ampamp && LHS.Val == 0)
RHSIsLive = false; // RHS of "0 && x" is dead.
else if (Operator == tok::pipepipe && LHS.Val != 0)
RHSIsLive = false; // RHS of "1 || x" is dead.
else if (Operator == tok::question && LHS.Val == 0)
RHSIsLive = false; // RHS (x) of "0 ? x : y" is dead.
else
RHSIsLive = ValueLive;
// Consume the operator, remembering the operator's location for reporting.
SourceLocation OpLoc = PeekTok.getLocation();
PP.LexNonComment(PeekTok);
PPValue RHS(LHS.getBitWidth());
// Parse the RHS of the operator.
DefinedTracker DT;
if (EvaluateValue(RHS, PeekTok, DT, RHSIsLive, PP)) return true;
// Remember the precedence of this operator and get the precedence of the
// operator immediately to the right of the RHS.
unsigned ThisPrec = PeekPrec;
PeekPrec = getPrecedence(PeekTok.getKind());
// If this token isn't valid, report the error.
if (PeekPrec == ~0U) {
PP.Diag(PeekTok.getLocation(), diag::err_pp_expr_bad_token_binop)
<< RHS.getRange();
return true;
}
// Decide whether to include the next binop in this subexpression. For
// example, when parsing x+y*z and looking at '*', we want to recursively
// handle y*z as a single subexpression. We do this because the precedence
// of * is higher than that of +. The only strange case we have to handle
// here is for the ?: operator, where the precedence is actually lower than
// the LHS of the '?'. The grammar rule is:
//
// conditional-expression ::=
// logical-OR-expression ? expression : conditional-expression
// where 'expression' is actually comma-expression.
unsigned RHSPrec;
if (Operator == tok::question)
// The RHS of "?" should be maximally consumed as an expression.
RHSPrec = getPrecedence(tok::comma);
else // All others should munch while higher precedence.
RHSPrec = ThisPrec+1;
if (PeekPrec >= RHSPrec) {
if (EvaluateDirectiveSubExpr(RHS, RHSPrec, PeekTok, RHSIsLive, PP))
return true;
PeekPrec = getPrecedence(PeekTok.getKind());
}
assert(PeekPrec <= ThisPrec && "Recursion didn't work!");
// Usual arithmetic conversions (C99 6.3.1.8p1): result is unsigned if
// either operand is unsigned.
llvm::APSInt Res(LHS.getBitWidth());
switch (Operator) {
case tok::question: // No UAC for x and y in "x ? y : z".
case tok::lessless: // Shift amount doesn't UAC with shift value.
case tok::greatergreater: // Shift amount doesn't UAC with shift value.
case tok::comma: // Comma operands are not subject to UACs.
case tok::pipepipe: // Logical || does not do UACs.
case tok::ampamp: // Logical && does not do UACs.
break; // No UAC
default:
Res.setIsUnsigned(LHS.isUnsigned()|RHS.isUnsigned());
// If this just promoted something from signed to unsigned, and if the
// value was negative, warn about it.
if (ValueLive && Res.isUnsigned()) {
if (!LHS.isUnsigned() && LHS.Val.isNegative())
PP.Diag(OpLoc, diag::warn_pp_convert_lhs_to_positive)
<< LHS.Val.toString(10, true) + " to " +
LHS.Val.toString(10, false)
<< LHS.getRange() << RHS.getRange();
if (!RHS.isUnsigned() && RHS.Val.isNegative())
PP.Diag(OpLoc, diag::warn_pp_convert_rhs_to_positive)
<< RHS.Val.toString(10, true) + " to " +
RHS.Val.toString(10, false)
<< LHS.getRange() << RHS.getRange();
}
LHS.Val.setIsUnsigned(Res.isUnsigned());
RHS.Val.setIsUnsigned(Res.isUnsigned());
}
bool Overflow = false;
switch (Operator) {
default: llvm_unreachable("Unknown operator token!");
case tok::percent:
if (RHS.Val != 0)
Res = LHS.Val % RHS.Val;
else if (ValueLive) {
PP.Diag(OpLoc, diag::err_pp_remainder_by_zero)
<< LHS.getRange() << RHS.getRange();
return true;
}
break;
case tok::slash:
if (RHS.Val != 0) {
if (LHS.Val.isSigned())
Res = llvm::APSInt(LHS.Val.sdiv_ov(RHS.Val, Overflow), false);
else
Res = LHS.Val / RHS.Val;
} else if (ValueLive) {
PP.Diag(OpLoc, diag::err_pp_division_by_zero)
<< LHS.getRange() << RHS.getRange();
return true;
}
break;
case tok::star:
if (Res.isSigned())
Res = llvm::APSInt(LHS.Val.smul_ov(RHS.Val, Overflow), false);
else
Res = LHS.Val * RHS.Val;
break;
case tok::lessless: {
// Determine whether overflow is about to happen.
if (LHS.isUnsigned())
Res = LHS.Val.ushl_ov(RHS.Val, Overflow);
else
Res = llvm::APSInt(LHS.Val.sshl_ov(RHS.Val, Overflow), false);
break;
}
case tok::greatergreater: {
// Determine whether overflow is about to happen.
unsigned ShAmt = static_cast<unsigned>(RHS.Val.getLimitedValue());
if (ShAmt >= LHS.getBitWidth())
Overflow = true, ShAmt = LHS.getBitWidth()-1;
Res = LHS.Val >> ShAmt;
break;
}
case tok::plus:
if (LHS.isUnsigned())
Res = LHS.Val + RHS.Val;
else
Res = llvm::APSInt(LHS.Val.sadd_ov(RHS.Val, Overflow), false);
break;
case tok::minus:
if (LHS.isUnsigned())
Res = LHS.Val - RHS.Val;
else
Res = llvm::APSInt(LHS.Val.ssub_ov(RHS.Val, Overflow), false);
break;
case tok::lessequal:
Res = LHS.Val <= RHS.Val;
Res.setIsUnsigned(false); // C99 6.5.8p6, result is always int (signed)
break;
case tok::less:
Res = LHS.Val < RHS.Val;
Res.setIsUnsigned(false); // C99 6.5.8p6, result is always int (signed)
break;
case tok::greaterequal:
Res = LHS.Val >= RHS.Val;
Res.setIsUnsigned(false); // C99 6.5.8p6, result is always int (signed)
break;
case tok::greater:
Res = LHS.Val > RHS.Val;
Res.setIsUnsigned(false); // C99 6.5.8p6, result is always int (signed)
break;
case tok::exclaimequal:
Res = LHS.Val != RHS.Val;
Res.setIsUnsigned(false); // C99 6.5.9p3, result is always int (signed)
break;
case tok::equalequal:
Res = LHS.Val == RHS.Val;
Res.setIsUnsigned(false); // C99 6.5.9p3, result is always int (signed)
break;
case tok::amp:
Res = LHS.Val & RHS.Val;
break;
case tok::caret:
Res = LHS.Val ^ RHS.Val;
break;
case tok::pipe:
Res = LHS.Val | RHS.Val;
break;
case tok::ampamp:
Res = (LHS.Val != 0 && RHS.Val != 0);
Res.setIsUnsigned(false); // C99 6.5.13p3, result is always int (signed)
break;
case tok::pipepipe:
Res = (LHS.Val != 0 || RHS.Val != 0);
Res.setIsUnsigned(false); // C99 6.5.14p3, result is always int (signed)
break;
case tok::comma:
// Comma is invalid in pp expressions in c89/c++ mode, but is valid in C99
// if not being evaluated.
if (!PP.getLangOpts().C99 || ValueLive)
PP.Diag(OpLoc, diag::ext_pp_comma_expr)
<< LHS.getRange() << RHS.getRange();
Res = RHS.Val; // LHS = LHS,RHS -> RHS.
break;
case tok::question: {
// Parse the : part of the expression.
if (PeekTok.isNot(tok::colon)) {
PP.Diag(PeekTok.getLocation(), diag::err_expected)
<< tok::colon << LHS.getRange() << RHS.getRange();
PP.Diag(OpLoc, diag::note_matching) << tok::question;
return true;
}
// Consume the :.
PP.LexNonComment(PeekTok);
// Evaluate the value after the :.
bool AfterColonLive = ValueLive && LHS.Val == 0;
PPValue AfterColonVal(LHS.getBitWidth());
DefinedTracker DT;
if (EvaluateValue(AfterColonVal, PeekTok, DT, AfterColonLive, PP))
return true;
// Parse anything after the : with the same precedence as ?. We allow
// things of equal precedence because ?: is right associative.
if (EvaluateDirectiveSubExpr(AfterColonVal, ThisPrec,
PeekTok, AfterColonLive, PP))
return true;
// Now that we have the condition, the LHS and the RHS of the :, evaluate.
Res = LHS.Val != 0 ? RHS.Val : AfterColonVal.Val;
RHS.setEnd(AfterColonVal.getRange().getEnd());
// Usual arithmetic conversions (C99 6.3.1.8p1): result is unsigned if
// either operand is unsigned.
Res.setIsUnsigned(RHS.isUnsigned() | AfterColonVal.isUnsigned());
// Figure out the precedence of the token after the : part.
PeekPrec = getPrecedence(PeekTok.getKind());
break;
}
case tok::colon:
// Don't allow :'s to float around without being part of ?: exprs.
PP.Diag(OpLoc, diag::err_pp_colon_without_question)
<< LHS.getRange() << RHS.getRange();
return true;
}
// If this operator is live and overflowed, report the issue.
if (Overflow && ValueLive)
PP.Diag(OpLoc, diag::warn_pp_expr_overflow)
<< LHS.getRange() << RHS.getRange();
// Put the result back into 'LHS' for our next iteration.
LHS.Val = Res;
LHS.setEnd(RHS.getRange().getEnd());
}
}
// #pragma pack(...) comes in the following delicious flavors:
// pack '(' [integer] ')'
// pack '(' 'show' ')'
// pack '(' ('push' | 'pop') [',' identifier] [, integer] ')'
void PragmaPackHandler::HandlePragma(Preprocessor &PP, Token &PackTok) {
// FIXME: Should we be expanding macros here? My guess is no.
SourceLocation PackLoc = PackTok.getLocation();
Token Tok;
PP.Lex(Tok);
if (Tok.isNot(tok::l_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_lparen) << "pack";
return;
}
Action::PragmaPackKind Kind = Action::PPK_Default;
IdentifierInfo *Name = 0;
Action::OwningExprResult Alignment(Actions);
SourceLocation LParenLoc = Tok.getLocation();
PP.Lex(Tok);
if (Tok.is(tok::numeric_constant)) {
Alignment = Actions.ActOnNumericConstant(Tok);
if (Alignment.isInvalid())
return;
PP.Lex(Tok);
} else if (Tok.is(tok::identifier)) {
const IdentifierInfo *II = Tok.getIdentifierInfo();
if (II->isStr("show")) {
Kind = Action::PPK_Show;
PP.Lex(Tok);
} else {
if (II->isStr("push")) {
Kind = Action::PPK_Push;
} else if (II->isStr("pop")) {
Kind = Action::PPK_Pop;
} else {
PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_invalid_action);
return;
}
PP.Lex(Tok);
if (Tok.is(tok::comma)) {
PP.Lex(Tok);
if (Tok.is(tok::numeric_constant)) {
Alignment = Actions.ActOnNumericConstant(Tok);
if (Alignment.isInvalid())
return;
PP.Lex(Tok);
} else if (Tok.is(tok::identifier)) {
Name = Tok.getIdentifierInfo();
PP.Lex(Tok);
if (Tok.is(tok::comma)) {
PP.Lex(Tok);
if (Tok.isNot(tok::numeric_constant)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_malformed);
return;
}
Alignment = Actions.ActOnNumericConstant(Tok);
if (Alignment.isInvalid())
return;
PP.Lex(Tok);
}
} else {
PP.Diag(Tok.getLocation(), diag::warn_pragma_pack_malformed);
return;
}
}
}
}
if (Tok.isNot(tok::r_paren)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_expected_rparen) << "pack";
return;
}
PP.Lex(Tok);
if (Tok.isNot(tok::eom)) {
PP.Diag(Tok.getLocation(), diag::warn_pragma_extra_tokens_at_eol) << "pack";
return;
}
SourceLocation RParenLoc = Tok.getLocation();
Actions.ActOnPragmaPack(Kind, Name, Alignment.release(), PackLoc,
LParenLoc, RParenLoc);
}
/// \brief Handle the microsoft \#pragma comment extension.
///
/// The syntax is:
/// \code
/// #pragma comment(linker, "foo")
/// \endcode
/// 'linker' is one of five identifiers: compiler, exestr, lib, linker, user.
/// "foo" is a string, which is fully macro expanded, and permits string
/// concatenation, embedded escape characters etc. See MSDN for more details.
void PragmaCommentHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducerKind Introducer,
Token &Tok) {
SourceLocation CommentLoc = Tok.getLocation();
PP.Lex(Tok);
if (Tok.isNot(tok::l_paren)) {
PP.Diag(CommentLoc, diag::err_pragma_comment_malformed);
return;
}
// Read the identifier.
PP.Lex(Tok);
if (Tok.isNot(tok::identifier)) {
PP.Diag(CommentLoc, diag::err_pragma_comment_malformed);
return;
}
// Verify that this is one of the 5 whitelisted options.
IdentifierInfo *II = Tok.getIdentifierInfo();
Sema::PragmaMSCommentKind Kind =
llvm::StringSwitch<Sema::PragmaMSCommentKind>(II->getName())
.Case("linker", Sema::PCK_Linker)
.Case("lib", Sema::PCK_Lib)
.Case("compiler", Sema::PCK_Compiler)
.Case("exestr", Sema::PCK_ExeStr)
.Case("user", Sema::PCK_User)
.Default(Sema::PCK_Unknown);
if (Kind == Sema::PCK_Unknown) {
PP.Diag(Tok.getLocation(), diag::err_pragma_comment_unknown_kind);
return;
}
// Read the optional string if present.
PP.Lex(Tok);
std::string ArgumentString;
if (Tok.is(tok::comma) && !PP.LexStringLiteral(Tok, ArgumentString,
"pragma comment",
/*MacroExpansion=*/true))
return;
// FIXME: warn that 'exestr' is deprecated.
// FIXME: If the kind is "compiler" warn if the string is present (it is
// ignored).
// The MSDN docs say that "lib" and "linker" require a string and have a short
// whitelist of linker options they support, but in practice MSVC doesn't
// issue a diagnostic. Therefore neither does clang.
if (Tok.isNot(tok::r_paren)) {
PP.Diag(Tok.getLocation(), diag::err_pragma_comment_malformed);
return;
}
PP.Lex(Tok); // eat the r_paren.
if (Tok.isNot(tok::eod)) {
PP.Diag(Tok.getLocation(), diag::err_pragma_comment_malformed);
return;
}
// If the pragma is lexically sound, notify any interested PPCallbacks.
if (PP.getPPCallbacks())
PP.getPPCallbacks()->PragmaComment(CommentLoc, II, ArgumentString);
Actions.ActOnPragmaMSComment(Kind, ArgumentString);
}