std::string Pretty()

in src/parser/token.h [223:344]
121 lines of code
58 McCabe index (conditional complexity)

std::string Pretty(const TokenType& token_type) {
  switch (token_type) {
    case TokenType::kCommentStart:
      return "`/*`";
    case TokenType::kCommentEnd:
      return "`*/`";
    case TokenType::kLineComment:
      return "`//`";
    case TokenType::kComment:
      return "comment";
    case TokenType::kWhitespace:
      return "whitespace";
    case TokenType::kNewline:
      return "newline";
    case TokenType::kStringLiteral:
      return "string literal";
    case TokenType::kIdentifier:
      return "identifier";
    case TokenType::kLocal:
      return "local variable";
    case TokenType::kGlobal:
      return "global variable";
    case TokenType::kGraph:
      return "graph variable";
    case TokenType::kOp:
      return "operator";
    case TokenType::kOpenParen:
      return "`(`";
    case TokenType::kCloseParen:
      return "`)`";
    case TokenType::kAtSymbol:
      return "`@`";
    case TokenType::kPercent:
      return "`%`";
    case TokenType::kComma:
      return "`,`";
    case TokenType::kColon:
      return "`:`";
    case TokenType::kSemicolon:
      return "`;`";
    case TokenType::kPeriod:
      return "`.`";
    case TokenType::kEqual:
      return "`=`";
    case TokenType::kInteger:
      return "integer";
    case TokenType::kFloat:
      return "float";
    case TokenType::kPlus:
      return "`+`";
    case TokenType::kStar:
      return "`*`";
    case TokenType::kMinus:
      return "`-`";
    case TokenType::kDivision:
      return "`/`";
    case TokenType::kRAngle:
      return "`<`";
    case TokenType::kLAngle:
      return "`>`";
    case TokenType::kRCurly:
      return "`}`";
    case TokenType::kLCurly:
      return "`{`";
    case TokenType::kRSquare:
      return "`]`";
    case TokenType::kLSquare:
      return "`[`";
    case TokenType::kBang:
      return "`!`";
    case TokenType::kUnderscore:
      return "`_`";
    case TokenType::kAt:
      return "`@`";
    case TokenType::kLet:
      return "`let`";
    case TokenType::kIf:
      return "`if`";
    case TokenType::kElse:
      return "`else`";
    case TokenType::kFn:
      return "`fn`";
    case TokenType::kDefn:
      return "`def`";
    case TokenType::kTypeDef:
      return "`type`";
    case TokenType::kExtern:
      return "`extern`";
    case TokenType::kBoolean:
      return "boolean";
    case TokenType::kMetadata:
      return "metadata section";
    case TokenType::kMetaReference:
      return "`meta`";
    case TokenType::kFreeVar:
      return "`free_var`";
    case TokenType::kMatch:
      return "`match`";
    case TokenType::kPartialMatch:
      return "`match?`";
    case TokenType::kQuestion:
      return "`?`";
    case TokenType::kRef:
      return "`ref`";
    case TokenType::kRefRead:
      return "`ref_read`";
    case TokenType::kRefWrite:
      return "`ref_write`";
    case TokenType::kUnknown:
      return "unknown";
    case TokenType::kEndOfFile:
      return "end of file";
    case TokenType::kNull:
      return "null";
    case TokenType::kVersion:
      return "version attribute";
    // Older compilers warn even though the above code is exhaustive.
    default:
      LOG(FATAL) << "unreachable code";
      return "";
  }
}