C++ StringRef::endswith_lower方法代码示例

llvm::SmallString<32> getTargetDependentLibraryOption(const llvm::Triple &T,
                                                      StringRef library) {
  llvm::SmallString<32> buffer;

  if (T.isWindowsMSVCEnvironment() || T.isWindowsItaniumEnvironment()) {
    bool quote = library.find(' ') != StringRef::npos;

    buffer += "/DEFAULTLIB:";
    if (quote)
      buffer += '"';
    buffer += library;
    if (!library.endswith_lower(".lib"))
      buffer += ".lib";
    if (quote)
      buffer += '"';
  } else if (T.isPS4()) {
    bool quote = library.find(' ') != StringRef::npos;

    buffer += "\01";
    if (quote)
      buffer += '"';
    buffer += library;
    if (quote)
      buffer += '"';
  } else {
    buffer += "-l";
    buffer += library;
  }

  return buffer;
}

bool MSP430AsmParser::ParseInstruction(ParseInstructionInfo &Info,
                                       StringRef Name, SMLoc NameLoc,
                                       OperandVector &Operands) {
  // Drop .w suffix
  if (Name.endswith_lower(".w"))
    Name = Name.drop_back(2);

  if (!parseJccInstruction(Info, Name, NameLoc, Operands))
    return false;

  // First operand is instruction mnemonic
  Operands.push_back(MSP430Operand::CreateToken(Name, NameLoc));

  // If there are no more operands, then finish
  if (getLexer().is(AsmToken::EndOfStatement))
    return false;

  // Parse first operand
  if (ParseOperand(Operands))
    return true;

  // Parse second operand if any
  if (getLexer().is(AsmToken::Comma)) {
    getLexer().Lex(); // Eat ','
    if (ParseOperand(Operands))
      return true;
  }

  if (getLexer().isNot(AsmToken::EndOfStatement)) {
    SMLoc Loc = getLexer().getLoc();
    getParser().eatToEndOfStatement();
    return Error(Loc, "unexpected token");
  }

  getParser().Lex(); // Consume the EndOfStatement.
  return false;
}

/// Match a word within a name to a word within a type.
static bool matchNameWordToTypeWord(StringRef nameWord, StringRef typeWord) {
  // If the name word is longer, there's no match.
  if (nameWord.size() > typeWord.size()) return false;

  // If the name word is shorter, try for a partial match.
  if (nameWord.size() < typeWord.size()) {
    // We can match the suffix of the type so long as everything preceding the
    // match is neither a lowercase letter nor a '_'. This ignores type
    // prefixes for acronyms, e.g., the 'NS' in 'NSURL'.
    if (typeWord.endswith_lower(nameWord) && 
        !clang::isLowercase(typeWord[typeWord.size()-nameWord.size()])) {
      // Check that everything preceding the match is neither a lowercase letter
      // nor a '_'.
      for (unsigned i = 0, n = nameWord.size(); i != n; ++i) {
        if (clang::isLowercase(typeWord[i]) || typeWord[i] == '_') return false;
      }

      return true;
    }

    // We can match a prefix so long as everything following the match is
    // a number.
    if (typeWord.startswith_lower(nameWord)) {
      for (unsigned i = nameWord.size(), n = typeWord.size(); i != n; ++i) {
        if (!clang::isDigit(typeWord[i])) return false;
      }

      return true;
    }

    return false;
  }

  // Check for an exact match.
  return nameWord.equals_lower(typeWord);
}

bool isCOFFLibraryFileExtension(StringRef path) {
  return path.endswith_lower(".lib") || path.endswith_lower(".imp");
}

static bool isAutorelease(const FunctionDecl *FD, StringRef FName) {
  return FName.startswith_lower("autorelease") ||
         FName.endswith_lower("autorelease");
}

static bool isRetain(const FunctionDecl *FD, StringRef FName) {
  return FName.startswith_lower("retain") || FName.endswith_lower("retain");
}