Class BytecodeVersionParser

lib/Bytecode/Common/CommandLineOptions.cpp:23–63

namespace {
class BytecodeVersionParser : public llvm::cl::parser<BytecodeVersion> {
public:
  BytecodeVersionParser(llvm::cl::Option &o)
      : llvm::cl::parser<BytecodeVersion>(o) {}

  bool parse(llvm::cl::Option &o, StringRef /*argName*/, StringRef arg,
             BytecodeVersion &v) {
    StringRef versionStr = arg;

    // Parse the `major.minor`.
    uint8_t verMajor, verMinor;
    if (versionStr.consumeInteger(10, verMajor) ||
        !versionStr.consume_front(".") ||
        versionStr.consumeInteger(10, verMinor))
      return o.error("Invalid argument '" + arg + "'");

    // Parse the `.tag`.
    uint16_t tag = 0;
    if (versionStr.consume_front(".") && versionStr.consumeInteger(10, tag))
      return o.error("Invalid argument '" + arg + "'");
    if (!versionStr.empty())
      return o.error("Invalid argument '" + arg + "'");

    std::optional<BytecodeVersion> version =
        BytecodeVersion::fromVersion(verMajor, verMinor, tag);
    if (!version) {
      return o.error(
          llvm::formatv(
              "Invalid argument '{0}': the supported versions are [{1} - {2}]",
              arg, BytecodeVersion::kMinSupportedVersion,
              BytecodeVersion::kCurrentVersion)
              .str());
    }

    // Set the version and return false to indicate success.
    v = *version;
    return false;
  }

  static void print(raw_ostream &os, const BytecodeVersion &v) { os << v; }
};

// Static storage for command line option value.
static BytecodeVersion *bytecodeVersionPtr = nullptr;