uniIM/node_modules/@intlify/message-compiler/dist/message-compiler.global.js

/*!
  * @intlify/message-compiler v9.1.9
  * (c) 2021 kazuya kawaguchi
  * Released under the MIT License.
  */
var IntlifyMessageCompiler = (function (exports) {
  'use strict';

  /**
   * Original Utilities
   * written by kazuya kawaguchi
   */
  const RE_ARGS = /\{([0-9a-zA-Z]+)\}/g;
  /* eslint-disable */
  function format(message, ...args) {
      if (args.length === 1 && isObject(args[0])) {
          args = args[0];
      }
      if (!args || !args.hasOwnProperty) {
          args = {};
      }
      return message.replace(RE_ARGS, (match, identifier) => {
          return args.hasOwnProperty(identifier) ? args[identifier] : '';
      });
  }
  const assign = Object.assign;
  const isString = (val) => typeof val === 'string';
  const isObject = (val) => // eslint-disable-line
   val !== null && typeof val === 'object';

  /** @internal */
  const errorMessages = {
      // tokenizer error messages
      [0 /* EXPECTED_TOKEN */]: `Expected token: '{0}'`,
      [1 /* INVALID_TOKEN_IN_PLACEHOLDER */]: `Invalid token in placeholder: '{0}'`,
      [2 /* UNTERMINATED_SINGLE_QUOTE_IN_PLACEHOLDER */]: `Unterminated single quote in placeholder`,
      [3 /* UNKNOWN_ESCAPE_SEQUENCE */]: `Unknown escape sequence: \\{0}`,
      [4 /* INVALID_UNICODE_ESCAPE_SEQUENCE */]: `Invalid unicode escape sequence: {0}`,
      [5 /* UNBALANCED_CLOSING_BRACE */]: `Unbalanced closing brace`,
      [6 /* UNTERMINATED_CLOSING_BRACE */]: `Unterminated closing brace`,
      [7 /* EMPTY_PLACEHOLDER */]: `Empty placeholder`,
      [8 /* NOT_ALLOW_NEST_PLACEHOLDER */]: `Not allowed nest placeholder`,
      [9 /* INVALID_LINKED_FORMAT */]: `Invalid linked format`,
      // parser error messages
      [10 /* MUST_HAVE_MESSAGES_IN_PLURAL */]: `Plural must have messages`,
      [11 /* UNEXPECTED_EMPTY_LINKED_MODIFIER */]: `Unexpected empty linked modifier`,
      [12 /* UNEXPECTED_EMPTY_LINKED_KEY */]: `Unexpected empty linked key`,
      [13 /* UNEXPECTED_LEXICAL_ANALYSIS */]: `Unexpected lexical analysis in token: '{0}'`
  };
  function createCompileError(code, loc, options = {}) {
      const { domain, messages, args } = options;
      const msg = format((messages || errorMessages)[code] || '', ...(args || []))
          ;
      const error = new SyntaxError(String(msg));
      error.code = code;
      if (loc) {
          error.location = loc;
      }
      error.domain = domain;
      return error;
  }
  /** @internal */
  function defaultOnError(error) {
      throw error;
  }

  const LocationStub = {
      start: { line: 1, column: 1, offset: 0 },
      end: { line: 1, column: 1, offset: 0 }
  };
  function createPosition(line, column, offset) {
      return { line, column, offset };
  }
  function createLocation(start, end, source) {
      const loc = { start, end };
      if (source != null) {
          loc.source = source;
      }
      return loc;
  }

  const CHAR_SP = ' ';
  const CHAR_CR = '\r';
  const CHAR_LF = '\n';
  const CHAR_LS = String.fromCharCode(0x2028);
  const CHAR_PS = String.fromCharCode(0x2029);
  function createScanner(str) {
      const _buf = str;
      let _index = 0;
      let _line = 1;
      let _column = 1;
      let _peekOffset = 0;
      const isCRLF = (index) => _buf[index] === CHAR_CR && _buf[index + 1] === CHAR_LF;
      const isLF = (index) => _buf[index] === CHAR_LF;
      const isPS = (index) => _buf[index] === CHAR_PS;
      const isLS = (index) => _buf[index] === CHAR_LS;
      const isLineEnd = (index) => isCRLF(index) || isLF(index) || isPS(index) || isLS(index);
      const index = () => _index;
      const line = () => _line;
      const column = () => _column;
      const peekOffset = () => _peekOffset;
      const charAt = (offset) => isCRLF(offset) || isPS(offset) || isLS(offset) ? CHAR_LF : _buf[offset];
      const currentChar = () => charAt(_index);
      const currentPeek = () => charAt(_index + _peekOffset);
      function next() {
          _peekOffset = 0;
          if (isLineEnd(_index)) {
              _line++;
              _column = 0;
          }
          if (isCRLF(_index)) {
              _index++;
          }
          _index++;
          _column++;
          return _buf[_index];
      }
      function peek() {
          if (isCRLF(_index + _peekOffset)) {
              _peekOffset++;
          }
          _peekOffset++;
          return _buf[_index + _peekOffset];
      }
      function reset() {
          _index = 0;
          _line = 1;
          _column = 1;
          _peekOffset = 0;
      }
      function resetPeek(offset = 0) {
          _peekOffset = offset;
      }
      function skipToPeek() {
          const target = _index + _peekOffset;
          // eslint-disable-next-line no-unmodified-loop-condition
          while (target !== _index) {
              next();
          }
          _peekOffset = 0;
      }
      return {
          index,
          line,
          column,
          peekOffset,
          charAt,
          currentChar,
          currentPeek,
          next,
          peek,
          reset,
          resetPeek,
          skipToPeek
      };
  }

  const EOF = undefined;
  const LITERAL_DELIMITER = "'";
  const ERROR_DOMAIN$1 = 'tokenizer';
  function createTokenizer(source, options = {}) {
      const location = options.location !== false;
      const _scnr = createScanner(source);
      const currentOffset = () => _scnr.index();
      const currentPosition = () => createPosition(_scnr.line(), _scnr.column(), _scnr.index());
      const _initLoc = currentPosition();
      const _initOffset = currentOffset();
      const _context = {
          currentType: 14 /* EOF */,
          offset: _initOffset,
          startLoc: _initLoc,
          endLoc: _initLoc,
          lastType: 14 /* EOF */,
          lastOffset: _initOffset,
          lastStartLoc: _initLoc,
          lastEndLoc: _initLoc,
          braceNest: 0,
          inLinked: false,
          text: ''
      };
      const context = () => _context;
      const { onError } = options;
      function emitError(code, pos, offset, ...args) {
          const ctx = context();
          pos.column += offset;
          pos.offset += offset;
          if (onError) {
              const loc = createLocation(ctx.startLoc, pos);
              const err = createCompileError(code, loc, {
                  domain: ERROR_DOMAIN$1,
                  args
              });
              onError(err);
          }
      }
      function getToken(context, type, value) {
          context.endLoc = currentPosition();
          context.currentType = type;
          const token = { type };
          if (location) {
              token.loc = createLocation(context.startLoc, context.endLoc);
          }
          if (value != null) {
              token.value = value;
          }
          return token;
      }
      const getEndToken = (context) => getToken(context, 14 /* EOF */);
      function eat(scnr, ch) {
          if (scnr.currentChar() === ch) {
              scnr.next();
              return ch;
          }
          else {
              emitError(0 /* EXPECTED_TOKEN */, currentPosition(), 0, ch);
              return '';
          }
      }
      function peekSpaces(scnr) {
          let buf = '';
          while (scnr.currentPeek() === CHAR_SP || scnr.currentPeek() === CHAR_LF) {
              buf += scnr.currentPeek();
              scnr.peek();
          }
          return buf;
      }
      function skipSpaces(scnr) {
          const buf = peekSpaces(scnr);
          scnr.skipToPeek();
          return buf;
      }
      function isIdentifierStart(ch) {
          if (ch === EOF) {
              return false;
          }
          const cc = ch.charCodeAt(0);
          return ((cc >= 97 && cc <= 122) || // a-z
              (cc >= 65 && cc <= 90) || // A-Z
              cc === 95 // _
          );
      }
      function isNumberStart(ch) {
          if (ch === EOF) {
              return false;
          }
          const cc = ch.charCodeAt(0);
          return cc >= 48 && cc <= 57; // 0-9
      }
      function isNamedIdentifierStart(scnr, context) {
          const { currentType } = context;
          if (currentType !== 2 /* BraceLeft */) {
              return false;
          }
          peekSpaces(scnr);
          const ret = isIdentifierStart(scnr.currentPeek());
          scnr.resetPeek();
          return ret;
      }
      function isListIdentifierStart(scnr, context) {
          const { currentType } = context;
          if (currentType !== 2 /* BraceLeft */) {
              return false;
          }
          peekSpaces(scnr);
          const ch = scnr.currentPeek() === '-' ? scnr.peek() : scnr.currentPeek();
          const ret = isNumberStart(ch);
          scnr.resetPeek();
          return ret;
      }
      function isLiteralStart(scnr, context) {
          const { currentType } = context;
          if (currentType !== 2 /* BraceLeft */) {
              return false;
          }
          peekSpaces(scnr);
          const ret = scnr.currentPeek() === LITERAL_DELIMITER;
          scnr.resetPeek();
          return ret;
      }
      function isLinkedDotStart(scnr, context) {
          const { currentType } = context;
          if (currentType !== 8 /* LinkedAlias */) {
              return false;
          }
          peekSpaces(scnr);
          const ret = scnr.currentPeek() === "." /* LinkedDot */;
          scnr.resetPeek();
          return ret;
      }
      function isLinkedModifierStart(scnr, context) {
          const { currentType } = context;
          if (currentType !== 9 /* LinkedDot */) {
              return false;
          }
          peekSpaces(scnr);
          const ret = isIdentifierStart(scnr.currentPeek());
          scnr.resetPeek();
          return ret;
      }
      function isLinkedDelimiterStart(scnr, context) {
          const { currentType } = context;
          if (!(currentType === 8 /* LinkedAlias */ ||
              currentType === 12 /* LinkedModifier */)) {
              return false;
          }
          peekSpaces(scnr);
          const ret = scnr.currentPeek() === ":" /* LinkedDelimiter */;
          scnr.resetPeek();
          return ret;
      }
      function isLinkedReferStart(scnr, context) {
          const { currentType } = context;
          if (currentType !== 10 /* LinkedDelimiter */) {
              return false;
          }
          const fn = () => {
              const ch = scnr.currentPeek();
              if (ch === "{" /* BraceLeft */) {
                  return isIdentifierStart(scnr.peek());
              }
              else if (ch === "@" /* LinkedAlias */ ||
                  ch === "%" /* Modulo */ ||
                  ch === "|" /* Pipe */ ||
                  ch === ":" /* LinkedDelimiter */ ||
                  ch === "." /* LinkedDot */ ||
                  ch === CHAR_SP ||
                  !ch) {
                  return false;
              }
              else if (ch === CHAR_LF) {
                  scnr.peek();
                  return fn();
              }
              else {
                  // other characters
                  return isIdentifierStart(ch);
              }
          };
          const ret = fn();
          scnr.resetPeek();
          return ret;
      }
      function isPluralStart(scnr) {
          peekSpaces(scnr);
          const ret = scnr.currentPeek() === "|" /* Pipe */;
          scnr.resetPeek();
          return ret;
      }
      function isTextStart(scnr, reset = true) {
          const fn = (hasSpace = false, prev = '', detectModulo = false) => {
              const ch = scnr.currentPeek();
              if (ch === "{" /* BraceLeft */) {
                  return prev === "%" /* Modulo */ ? false : hasSpace;
              }
              else if (ch === "@" /* LinkedAlias */ || !ch) {
                  return prev === "%" /* Modulo */ ? true : hasSpace;
              }
              else if (ch === "%" /* Modulo */) {
                  scnr.peek();
                  return fn(hasSpace, "%" /* Modulo */, true);
              }
              else if (ch === "|" /* Pipe */) {
                  return prev === "%" /* Modulo */ || detectModulo
                      ? true
                      : !(prev === CHAR_SP || prev === CHAR_LF);
              }
              else if (ch === CHAR_SP) {
                  scnr.peek();
                  return fn(true, CHAR_SP, detectModulo);
              }
              else if (ch === CHAR_LF) {
                  scnr.peek();
                  return fn(true, CHAR_LF, detectModulo);
              }
              else {
                  return true;
              }
          };
          const ret = fn();
          reset && scnr.resetPeek();
          return ret;
      }
      function takeChar(scnr, fn) {
          const ch = scnr.currentChar();
          if (ch === EOF) {
              return EOF;
          }
          if (fn(ch)) {
              scnr.next();
              return ch;
          }
          return null;
      }
      function takeIdentifierChar(scnr) {
          const closure = (ch) => {
              const cc = ch.charCodeAt(0);
              return ((cc >= 97 && cc <= 122) || // a-z
                  (cc >= 65 && cc <= 90) || // A-Z
                  (cc >= 48 && cc <= 57) || // 0-9
                  cc === 95 || // _
                  cc === 36 // $
              );
          };
          return takeChar(scnr, closure);
      }
      function takeDigit(scnr) {
          const closure = (ch) => {
              const cc = ch.charCodeAt(0);
              return cc >= 48 && cc <= 57; // 0-9
          };
          return takeChar(scnr, closure);
      }
      function takeHexDigit(scnr) {
          const closure = (ch) => {
              const cc = ch.charCodeAt(0);
              return ((cc >= 48 && cc <= 57) || // 0-9
                  (cc >= 65 && cc <= 70) || // A-F
                  (cc >= 97 && cc <= 102)); // a-f
          };
          return takeChar(scnr, closure);
      }
      function getDigits(scnr) {
          let ch = '';
          let num = '';
          while ((ch = takeDigit(scnr))) {
              num += ch;
          }
          return num;
      }
      function readText(scnr) {
          let buf = '';
          while (true) {
              const ch = scnr.currentChar();
              if (ch === "{" /* BraceLeft */ ||
                  ch === "}" /* BraceRight */ ||
                  ch === "@" /* LinkedAlias */ ||
                  ch === "|" /* Pipe */ ||
                  !ch) {
                  break;
              }
              else if (ch === "%" /* Modulo */) {
                  if (isTextStart(scnr)) {
                      buf += ch;
                      scnr.next();
                  }
                  else {
                      break;
                  }
              }
              else if (ch === CHAR_SP || ch === CHAR_LF) {
                  if (isTextStart(scnr)) {
                      buf += ch;
                      scnr.next();
                  }
                  else if (isPluralStart(scnr)) {
                      break;
                  }
                  else {
                      buf += ch;
                      scnr.next();
                  }
              }
              else {
                  buf += ch;
                  scnr.next();
              }
          }
          return buf;
      }
      function readNamedIdentifier(scnr) {
          skipSpaces(scnr);
          let ch = '';
          let name = '';
          while ((ch = takeIdentifierChar(scnr))) {
              name += ch;
          }
          if (scnr.currentChar() === EOF) {
              emitError(6 /* UNTERMINATED_CLOSING_BRACE */, currentPosition(), 0);
          }
          return name;
      }
      function readListIdentifier(scnr) {
          skipSpaces(scnr);
          let value = '';
          if (scnr.currentChar() === '-') {
              scnr.next();
              value += `-${getDigits(scnr)}`;
          }
          else {
              value += getDigits(scnr);
          }
          if (scnr.currentChar() === EOF) {
              emitError(6 /* UNTERMINATED_CLOSING_BRACE */, currentPosition(), 0);
          }
          return value;
      }
      function readLiteral(scnr) {
          skipSpaces(scnr);
          eat(scnr, `\'`);
          let ch = '';
          let literal = '';
          const fn = (x) => x !== LITERAL_DELIMITER && x !== CHAR_LF;
          while ((ch = takeChar(scnr, fn))) {
              if (ch === '\\') {
                  literal += readEscapeSequence(scnr);
              }
              else {
                  literal += ch;
              }
          }
          const current = scnr.currentChar();
          if (current === CHAR_LF || current === EOF) {
              emitError(2 /* UNTERMINATED_SINGLE_QUOTE_IN_PLACEHOLDER */, currentPosition(), 0);
              // TODO: Is it correct really?
              if (current === CHAR_LF) {
                  scnr.next();
                  eat(scnr, `\'`);
              }
              return literal;
          }
          eat(scnr, `\'`);
          return literal;
      }
      function readEscapeSequence(scnr) {
          const ch = scnr.currentChar();
          switch (ch) {
              case '\\':
              case `\'`:
                  scnr.next();
                  return `\\${ch}`;
              case 'u':
                  return readUnicodeEscapeSequence(scnr, ch, 4);
              case 'U':
                  return readUnicodeEscapeSequence(scnr, ch, 6);
              default:
                  emitError(3 /* UNKNOWN_ESCAPE_SEQUENCE */, currentPosition(), 0, ch);
                  return '';
          }
      }
      function readUnicodeEscapeSequence(scnr, unicode, digits) {
          eat(scnr, unicode);
          let sequence = '';
          for (let i = 0; i < digits; i++) {
              const ch = takeHexDigit(scnr);
              if (!ch) {
                  emitError(4 /* INVALID_UNICODE_ESCAPE_SEQUENCE */, currentPosition(), 0, `\\${unicode}${sequence}${scnr.currentChar()}`);
                  break;
              }
              sequence += ch;
          }
          return `\\${unicode}${sequence}`;
      }
      function readInvalidIdentifier(scnr) {
          skipSpaces(scnr);
          let ch = '';
          let identifiers = '';
          const closure = (ch) => ch !== "{" /* BraceLeft */ &&
              ch !== "}" /* BraceRight */ &&
              ch !== CHAR_SP &&
              ch !== CHAR_LF;
          while ((ch = takeChar(scnr, closure))) {
              identifiers += ch;
          }
          return identifiers;
      }
      function readLinkedModifier(scnr) {
          let ch = '';
          let name = '';
          while ((ch = takeIdentifierChar(scnr))) {
              name += ch;
          }
          return name;
      }
      function readLinkedRefer(scnr) {
          const fn = (detect = false, buf) => {
              const ch = scnr.currentChar();
              if (ch === "{" /* BraceLeft */ ||
                  ch === "%" /* Modulo */ ||
                  ch === "@" /* LinkedAlias */ ||
                  ch === "|" /* Pipe */ ||
                  !ch) {
                  return buf;
              }
              else if (ch === CHAR_SP) {
                  return buf;
              }
              else if (ch === CHAR_LF) {
                  buf += ch;
                  scnr.next();
                  return fn(detect, buf);
              }
              else {
                  buf += ch;
                  scnr.next();
                  return fn(true, buf);
              }
          };
          return fn(false, '');
      }
      function readPlural(scnr) {
          skipSpaces(scnr);
          const plural = eat(scnr, "|" /* Pipe */);
          skipSpaces(scnr);
          return plural;
      }
      // TODO: We need refactoring of token parsing ...
      function readTokenInPlaceholder(scnr, context) {
          let token = null;
          const ch = scnr.currentChar();
          switch (ch) {
              case "{" /* BraceLeft */:
                  if (context.braceNest >= 1) {
                      emitError(8 /* NOT_ALLOW_NEST_PLACEHOLDER */, currentPosition(), 0);
                  }
                  scnr.next();
                  token = getToken(context, 2 /* BraceLeft */, "{" /* BraceLeft */);
                  skipSpaces(scnr);
                  context.braceNest++;
                  return token;
              case "}" /* BraceRight */:
                  if (context.braceNest > 0 &&
                      context.currentType === 2 /* BraceLeft */) {
                      emitError(7 /* EMPTY_PLACEHOLDER */, currentPosition(), 0);
                  }
                  scnr.next();
                  token = getToken(context, 3 /* BraceRight */, "}" /* BraceRight */);
                  context.braceNest--;
                  context.braceNest > 0 && skipSpaces(scnr);
                  if (context.inLinked && context.braceNest === 0) {
                      context.inLinked = false;
                  }
                  return token;
              case "@" /* LinkedAlias */:
                  if (context.braceNest > 0) {
                      emitError(6 /* UNTERMINATED_CLOSING_BRACE */, currentPosition(), 0);
                  }
                  token = readTokenInLinked(scnr, context) || getEndToken(context);
                  context.braceNest = 0;
                  return token;
              default:
                  let validNamedIdentifier = true;
                  let validListIdentifier = true;
                  let validLiteral = true;
                  if (isPluralStart(scnr)) {
                      if (context.braceNest > 0) {
                          emitError(6 /* UNTERMINATED_CLOSING_BRACE */, currentPosition(), 0);
                      }
                      token = getToken(context, 1 /* Pipe */, readPlural(scnr));
                      // reset
                      context.braceNest = 0;
                      context.inLinked = false;
                      return token;
                  }
                  if (context.braceNest > 0 &&
                      (context.currentType === 5 /* Named */ ||
                          context.currentType === 6 /* List */ ||
                          context.currentType === 7 /* Literal */)) {
                      emitError(6 /* UNTERMINATED_CLOSING_BRACE */, currentPosition(), 0);
                      context.braceNest = 0;
                      return readToken(scnr, context);
                  }
                  if ((validNamedIdentifier = isNamedIdentifierStart(scnr, context))) {
                      token = getToken(context, 5 /* Named */, readNamedIdentifier(scnr));
                      skipSpaces(scnr);
                      return token;
                  }
                  if ((validListIdentifier = isListIdentifierStart(scnr, context))) {
                      token = getToken(context, 6 /* List */, readListIdentifier(scnr));
                      skipSpaces(scnr);
                      return token;
                  }
                  if ((validLiteral = isLiteralStart(scnr, context))) {
                      token = getToken(context, 7 /* Literal */, readLiteral(scnr));
                      skipSpaces(scnr);
                      return token;
                  }
                  if (!validNamedIdentifier && !validListIdentifier && !validLiteral) {
                      // TODO: we should be re-designed invalid cases, when we will extend message syntax near the future ...
                      token = getToken(context, 13 /* InvalidPlace */, readInvalidIdentifier(scnr));
                      emitError(1 /* INVALID_TOKEN_IN_PLACEHOLDER */, currentPosition(), 0, token.value);
                      skipSpaces(scnr);
                      return token;
                  }
                  break;
          }
          return token;
      }
      // TODO: We need refactoring of token parsing ...
      function readTokenInLinked(scnr, context) {
          const { currentType } = context;
          let token = null;
          const ch = scnr.currentChar();
          if ((currentType === 8 /* LinkedAlias */ ||
              currentType === 9 /* LinkedDot */ ||
              currentType === 12 /* LinkedModifier */ ||
              currentType === 10 /* LinkedDelimiter */) &&
              (ch === CHAR_LF || ch === CHAR_SP)) {
              emitError(9 /* INVALID_LINKED_FORMAT */, currentPosition(), 0);
          }
          switch (ch) {
              case "@" /* LinkedAlias */:
                  scnr.next();
                  token = getToken(context, 8 /* LinkedAlias */, "@" /* LinkedAlias */);
                  context.inLinked = true;
                  return token;
              case "." /* LinkedDot */:
                  skipSpaces(scnr);
                  scnr.next();
                  return getToken(context, 9 /* LinkedDot */, "." /* LinkedDot */);
              case ":" /* LinkedDelimiter */:
                  skipSpaces(scnr);
                  scnr.next();
                  return getToken(context, 10 /* LinkedDelimiter */, ":" /* LinkedDelimiter */);
              default:
                  if (isPluralStart(scnr)) {
                      token = getToken(context, 1 /* Pipe */, readPlural(scnr));
                      // reset
                      context.braceNest = 0;
                      context.inLinked = false;
                      return token;
                  }
                  if (isLinkedDotStart(scnr, context) ||
                      isLinkedDelimiterStart(scnr, context)) {
                      skipSpaces(scnr);
                      return readTokenInLinked(scnr, context);
                  }
                  if (isLinkedModifierStart(scnr, context)) {
                      skipSpaces(scnr);
                      return getToken(context, 12 /* LinkedModifier */, readLinkedModifier(scnr));
                  }
                  if (isLinkedReferStart(scnr, context)) {
                      skipSpaces(scnr);
                      if (ch === "{" /* BraceLeft */) {
                          // scan the placeholder
                          return readTokenInPlaceholder(scnr, context) || token;
                      }
                      else {
                          return getToken(context, 11 /* LinkedKey */, readLinkedRefer(scnr));
                      }
                  }
                  if (currentType === 8 /* LinkedAlias */) {
                      emitError(9 /* INVALID_LINKED_FORMAT */, currentPosition(), 0);
                  }
                  context.braceNest = 0;
                  context.inLinked = false;
                  return readToken(scnr, context);
          }
      }
      // TODO: We need refactoring of token parsing ...
      function readToken(scnr, context) {
          let token = { type: 14 /* EOF */ };
          if (context.braceNest > 0) {
              return readTokenInPlaceholder(scnr, context) || getEndToken(context);
          }
          if (context.inLinked) {
              return readTokenInLinked(scnr, context) || getEndToken(context);
          }
          const ch = scnr.currentChar();
          switch (ch) {
              case "{" /* BraceLeft */:
                  return readTokenInPlaceholder(scnr, context) || getEndToken(context);
              case "}" /* BraceRight */:
                  emitError(5 /* UNBALANCED_CLOSING_BRACE */, currentPosition(), 0);
                  scnr.next();
                  return getToken(context, 3 /* BraceRight */, "}" /* BraceRight */);
              case "@" /* LinkedAlias */:
                  return readTokenInLinked(scnr, context) || getEndToken(context);
              default:
                  if (isPluralStart(scnr)) {
                      token = getToken(context, 1 /* Pipe */, readPlural(scnr));
                      // reset
                      context.braceNest = 0;
                      context.inLinked = false;
                      return token;
                  }
                  if (isTextStart(scnr)) {
                      return getToken(context, 0 /* Text */, readText(scnr));
                  }
                  if (ch === "%" /* Modulo */) {
                      scnr.next();
                      return getToken(context, 4 /* Modulo */, "%" /* Modulo */);
                  }
                  break;
          }
          return token;
      }
      function nextToken() {
          const { currentType, offset, startLoc, endLoc } = _context;
          _context.lastType = currentType;
          _context.lastOffset = offset;
          _context.lastStartLoc = startLoc;
          _context.lastEndLoc = endLoc;
          _context.offset = currentOffset();
          _context.startLoc = currentPosition();
          if (_scnr.currentChar() === EOF) {
              return getToken(_context, 14 /* EOF */);
          }
          return readToken(_scnr, _context);
      }
      return {
          nextToken,
          currentOffset,
          currentPosition,
          context
      };
  }

  const ERROR_DOMAIN = 'parser';
  // Backslash backslash, backslash quote, uHHHH, UHHHHHH.
  const KNOWN_ESCAPES = /(?:\\\\|\\'|\\u([0-9a-fA-F]{4})|\\U([0-9a-fA-F]{6}))/g;
  function fromEscapeSequence(match, codePoint4, codePoint6) {
      switch (match) {
          case `\\\\`:
              return `\\`;
          case `\\\'`:
              return `\'`;
          default: {
              const codePoint = parseInt(codePoint4 || codePoint6, 16);
              if (codePoint <= 0xd7ff || codePoint >= 0xe000) {
                  return String.fromCodePoint(codePoint);
              }
              // invalid ...
              // Replace them with U+FFFD REPLACEMENT CHARACTER.
              return '�';
          }
      }
  }
  function createParser(options = {}) {
      const location = options.location !== false;
      const { onError } = options;
      function emitError(tokenzer, code, start, offset, ...args) {
          const end = tokenzer.currentPosition();
          end.offset += offset;
          end.column += offset;
          if (onError) {
              const loc = createLocation(start, end);
              const err = createCompileError(code, loc, {
                  domain: ERROR_DOMAIN,
                  args
              });
              onError(err);
          }
      }
      function startNode(type, offset, loc) {
          const node = {
              type,
              start: offset,
              end: offset
          };
          if (location) {
              node.loc = { start: loc, end: loc };
          }
          return node;
      }
      function endNode(node, offset, pos, type) {
          node.end = offset;
          if (type) {
              node.type = type;
          }
          if (location && node.loc) {
              node.loc.end = pos;
          }
      }
      function parseText(tokenizer, value) {
          const context = tokenizer.context();
          const node = startNode(3 /* Text */, context.offset, context.startLoc);
          node.value = value;
          endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());
          return node;
      }
      function parseList(tokenizer, index) {
          const context = tokenizer.context();
          const { lastOffset: offset, lastStartLoc: loc } = context; // get brace left loc
          const node = startNode(5 /* List */, offset, loc);
          node.index = parseInt(index, 10);
          tokenizer.nextToken(); // skip brach right
          endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());
          return node;
      }
      function parseNamed(tokenizer, key) {
          const context = tokenizer.context();
          const { lastOffset: offset, lastStartLoc: loc } = context; // get brace left loc
          const node = startNode(4 /* Named */, offset, loc);
          node.key = key;
          tokenizer.nextToken(); // skip brach right
          endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());
          return node;
      }
      function parseLiteral(tokenizer, value) {
          const context = tokenizer.context();
          const { lastOffset: offset, lastStartLoc: loc } = context; // get brace left loc
          const node = startNode(9 /* Literal */, offset, loc);
          node.value = value.replace(KNOWN_ESCAPES, fromEscapeSequence);
          tokenizer.nextToken(); // skip brach right
          endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());
          return node;
      }
      function parseLinkedModifier(tokenizer) {
          const token = tokenizer.nextToken();
          const context = tokenizer.context();
          const { lastOffset: offset, lastStartLoc: loc } = context; // get linked dot loc
          const node = startNode(8 /* LinkedModifier */, offset, loc);
          if (token.type !== 12 /* LinkedModifier */) {
              // empty modifier
              emitError(tokenizer, 11 /* UNEXPECTED_EMPTY_LINKED_MODIFIER */, context.lastStartLoc, 0);
              node.value = '';
              endNode(node, offset, loc);
              return {
                  nextConsumeToken: token,
                  node
              };
          }
          // check token
          if (token.value == null) {
              emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));
          }
          node.value = token.value || '';
          endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());
          return {
              node
          };
      }
      function parseLinkedKey(tokenizer, value) {
          const context = tokenizer.context();
          const node = startNode(7 /* LinkedKey */, context.offset, context.startLoc);
          node.value = value;
          endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());
          return node;
      }
      function parseLinked(tokenizer) {
          const context = tokenizer.context();
          const linkedNode = startNode(6 /* Linked */, context.offset, context.startLoc);
          let token = tokenizer.nextToken();
          if (token.type === 9 /* LinkedDot */) {
              const parsed = parseLinkedModifier(tokenizer);
              linkedNode.modifier = parsed.node;
              token = parsed.nextConsumeToken || tokenizer.nextToken();
          }
          // asset check token
          if (token.type !== 10 /* LinkedDelimiter */) {
              emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));
          }
          token = tokenizer.nextToken();
          // skip brace left
          if (token.type === 2 /* BraceLeft */) {
              token = tokenizer.nextToken();
          }
          switch (token.type) {
              case 11 /* LinkedKey */:
                  if (token.value == null) {
                      emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));
                  }
                  linkedNode.key = parseLinkedKey(tokenizer, token.value || '');
                  break;
              case 5 /* Named */:
                  if (token.value == null) {
                      emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));
                  }
                  linkedNode.key = parseNamed(tokenizer, token.value || '');
                  break;
              case 6 /* List */:
                  if (token.value == null) {
                      emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));
                  }
                  linkedNode.key = parseList(tokenizer, token.value || '');
                  break;
              case 7 /* Literal */:
                  if (token.value == null) {
                      emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));
                  }
                  linkedNode.key = parseLiteral(tokenizer, token.value || '');
                  break;
              default:
                  // empty key
                  emitError(tokenizer, 12 /* UNEXPECTED_EMPTY_LINKED_KEY */, context.lastStartLoc, 0);
                  const nextContext = tokenizer.context();
                  const emptyLinkedKeyNode = startNode(7 /* LinkedKey */, nextContext.offset, nextContext.startLoc);
                  emptyLinkedKeyNode.value = '';
                  endNode(emptyLinkedKeyNode, nextContext.offset, nextContext.startLoc);
                  linkedNode.key = emptyLinkedKeyNode;
                  endNode(linkedNode, nextContext.offset, nextContext.startLoc);
                  return {
                      nextConsumeToken: token,
                      node: linkedNode
                  };
          }
          endNode(linkedNode, tokenizer.currentOffset(), tokenizer.currentPosition());
          return {
              node: linkedNode
          };
      }
      function parseMessage(tokenizer) {
          const context = tokenizer.context();
          const startOffset = context.currentType === 1 /* Pipe */
              ? tokenizer.currentOffset()
              : context.offset;
          const startLoc = context.currentType === 1 /* Pipe */
              ? context.endLoc
              : context.startLoc;
          const node = startNode(2 /* Message */, startOffset, startLoc);
          node.items = [];
          let nextToken = null;
          do {
              const token = nextToken || tokenizer.nextToken();
              nextToken = null;
              switch (token.type) {
                  case 0 /* Text */:
                      if (token.value == null) {
                          emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));
                      }
                      node.items.push(parseText(tokenizer, token.value || ''));
                      break;
                  case 6 /* List */:
                      if (token.value == null) {
                          emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));
                      }
                      node.items.push(parseList(tokenizer, token.value || ''));
                      break;
                  case 5 /* Named */:
                      if (token.value == null) {
                          emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));
                      }
                      node.items.push(parseNamed(tokenizer, token.value || ''));
                      break;
                  case 7 /* Literal */:
                      if (token.value == null) {
                          emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));
                      }
                      node.items.push(parseLiteral(tokenizer, token.value || ''));
                      break;
                  case 8 /* LinkedAlias */:
                      const parsed = parseLinked(tokenizer);
                      node.items.push(parsed.node);
                      nextToken = parsed.nextConsumeToken || null;
                      break;
              }
          } while (context.currentType !== 14 /* EOF */ &&
              context.currentType !== 1 /* Pipe */);
          // adjust message node loc
          const endOffset = context.currentType === 1 /* Pipe */
              ? context.lastOffset
              : tokenizer.currentOffset();
          const endLoc = context.currentType === 1 /* Pipe */
              ? context.lastEndLoc
              : tokenizer.currentPosition();
          endNode(node, endOffset, endLoc);
          return node;
      }
      function parsePlural(tokenizer, offset, loc, msgNode) {
          const context = tokenizer.context();
          let hasEmptyMessage = msgNode.items.length === 0;
          const node = startNode(1 /* Plural */, offset, loc);
          node.cases = [];
          node.cases.push(msgNode);
          do {
              const msg = parseMessage(tokenizer);
              if (!hasEmptyMessage) {
                  hasEmptyMessage = msg.items.length === 0;
              }
              node.cases.push(msg);
          } while (context.currentType !== 14 /* EOF */);
          if (hasEmptyMessage) {
              emitError(tokenizer, 10 /* MUST_HAVE_MESSAGES_IN_PLURAL */, loc, 0);
          }
          endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());
          return node;
      }
      function parseResource(tokenizer) {
          const context = tokenizer.context();
          const { offset, startLoc } = context;
          const msgNode = parseMessage(tokenizer);
          if (context.currentType === 14 /* EOF */) {
              return msgNode;
          }
          else {
              return parsePlural(tokenizer, offset, startLoc, msgNode);
          }
      }
      function parse(source) {
          const tokenizer = createTokenizer(source, assign({}, options));
          const context = tokenizer.context();
          const node = startNode(0 /* Resource */, context.offset, context.startLoc);
          if (location && node.loc) {
              node.loc.source = source;
          }
          node.body = parseResource(tokenizer);
          // assert whether achieved to EOF
          if (context.currentType !== 14 /* EOF */) {
              emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, source[context.offset] || '');
          }
          endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());
          return node;
      }
      return { parse };
  }
  function getTokenCaption(token) {
      if (token.type === 14 /* EOF */) {
          return 'EOF';
      }
      const name = (token.value || '').replace(/\r?\n/gu, '\\n');
      return name.length > 10 ? name.slice(0, 9) + '…' : name;
  }

  function createTransformer(ast, options = {} // eslint-disable-line
  ) {
      const _context = {
          ast,
          helpers: new Set()
      };
      const context = () => _context;
      const helper = (name) => {
          _context.helpers.add(name);
          return name;
      };
      return { context, helper };
  }
  function traverseNodes(nodes, transformer) {
      for (let i = 0; i < nodes.length; i++) {
          traverseNode(nodes[i], transformer);
      }
  }
  function traverseNode(node, transformer) {
      // TODO: if we need pre-hook of transform, should be implemented to here
      switch (node.type) {
          case 1 /* Plural */:
              traverseNodes(node.cases, transformer);
              transformer.helper("plural" /* PLURAL */);
              break;
          case 2 /* Message */:
              traverseNodes(node.items, transformer);
              break;
          case 6 /* Linked */:
              const linked = node;
              traverseNode(linked.key, transformer);
              transformer.helper("linked" /* LINKED */);
              break;
          case 5 /* List */:
              transformer.helper("interpolate" /* INTERPOLATE */);
              transformer.helper("list" /* LIST */);
              break;
          case 4 /* Named */:
              transformer.helper("interpolate" /* INTERPOLATE */);
              transformer.helper("named" /* NAMED */);
              break;
      }
      // TODO: if we need post-hook of transform, should be implemented to here
  }
  // transform AST
  function transform(ast, options = {} // eslint-disable-line
  ) {
      const transformer = createTransformer(ast);
      transformer.helper("normalize" /* NORMALIZE */);
      // traverse
      ast.body && traverseNode(ast.body, transformer);
      // set meta information
      const context = transformer.context();
      ast.helpers = Array.from(context.helpers);
  }

  function createCodeGenerator(ast, options) {
      const { sourceMap, filename, breakLineCode, needIndent: _needIndent } = options;
      const _context = {
          source: ast.loc.source,
          filename,
          code: '',
          column: 1,
          line: 1,
          offset: 0,
          map: undefined,
          breakLineCode,
          needIndent: _needIndent,
          indentLevel: 0
      };
      const context = () => _context;
      function push(code, node) {
          _context.code += code;
      }
      function _newline(n, withBreakLine = true) {
          const _breakLineCode = withBreakLine ? breakLineCode : '';
          push(_needIndent ? _breakLineCode + `  `.repeat(n) : _breakLineCode);
      }
      function indent(withNewLine = true) {
          const level = ++_context.indentLevel;
          withNewLine && _newline(level);
      }
      function deindent(withNewLine = true) {
          const level = --_context.indentLevel;
          withNewLine && _newline(level);
      }
      function newline() {
          _newline(_context.indentLevel);
      }
      const helper = (key) => `_${key}`;
      const needIndent = () => _context.needIndent;
      return {
          context,
          push,
          indent,
          deindent,
          newline,
          helper,
          needIndent
      };
  }
  function generateLinkedNode(generator, node) {
      const { helper } = generator;
      generator.push(`${helper("linked" /* LINKED */)}(`);
      generateNode(generator, node.key);
      if (node.modifier) {
          generator.push(`, `);
          generateNode(generator, node.modifier);
      }
      generator.push(`)`);
  }
  function generateMessageNode(generator, node) {
      const { helper, needIndent } = generator;
      generator.push(`${helper("normalize" /* NORMALIZE */)}([`);
      generator.indent(needIndent());
      const length = node.items.length;
      for (let i = 0; i < length; i++) {
          generateNode(generator, node.items[i]);
          if (i === length - 1) {
              break;
          }
          generator.push(', ');
      }
      generator.deindent(needIndent());
      generator.push('])');
  }
  function generatePluralNode(generator, node) {
      const { helper, needIndent } = generator;
      if (node.cases.length > 1) {
          generator.push(`${helper("plural" /* PLURAL */)}([`);
          generator.indent(needIndent());
          const length = node.cases.length;
          for (let i = 0; i < length; i++) {
              generateNode(generator, node.cases[i]);
              if (i === length - 1) {
                  break;
              }
              generator.push(', ');
          }
          generator.deindent(needIndent());
          generator.push(`])`);
      }
  }
  function generateResource(generator, node) {
      if (node.body) {
          generateNode(generator, node.body);
      }
      else {
          generator.push('null');
      }
  }
  function generateNode(generator, node) {
      const { helper } = generator;
      switch (node.type) {
          case 0 /* Resource */:
              generateResource(generator, node);
              break;
          case 1 /* Plural */:
              generatePluralNode(generator, node);
              break;
          case 2 /* Message */:
              generateMessageNode(generator, node);
              break;
          case 6 /* Linked */:
              generateLinkedNode(generator, node);
              break;
          case 8 /* LinkedModifier */:
              generator.push(JSON.stringify(node.value), node);
              break;
          case 7 /* LinkedKey */:
              generator.push(JSON.stringify(node.value), node);
              break;
          case 5 /* List */:
              generator.push(`${helper("interpolate" /* INTERPOLATE */)}(${helper("list" /* LIST */)}(${node.index}))`, node);
              break;
          case 4 /* Named */:
              generator.push(`${helper("interpolate" /* INTERPOLATE */)}(${helper("named" /* NAMED */)}(${JSON.stringify(node.key)}))`, node);
              break;
          case 9 /* Literal */:
              generator.push(JSON.stringify(node.value), node);
              break;
          case 3 /* Text */:
              generator.push(JSON.stringify(node.value), node);
              break;
          default:
              {
                  throw new Error(`unhandled codegen node type: ${node.type}`);
              }
      }
  }
  // generate code from AST
  const generate = (ast, options = {} // eslint-disable-line
  ) => {
      const mode = isString(options.mode) ? options.mode : 'normal';
      const filename = isString(options.filename)
          ? options.filename
          : 'message.intl';
      const sourceMap = !!options.sourceMap;
      // prettier-ignore
      const breakLineCode = options.breakLineCode != null
          ? options.breakLineCode
          : mode === 'arrow'
              ? ';'
              : '\n';
      const needIndent = options.needIndent ? options.needIndent : mode !== 'arrow';
      const helpers = ast.helpers || [];
      const generator = createCodeGenerator(ast, {
          mode,
          filename,
          sourceMap,
          breakLineCode,
          needIndent
      });
      generator.push(mode === 'normal' ? `function __msg__ (ctx) {` : `(ctx) => {`);
      generator.indent(needIndent);
      if (helpers.length > 0) {
          generator.push(`const { ${helpers.map(s => `${s}: _${s}`).join(', ')} } = ctx`);
          generator.newline();
      }
      generator.push(`return `);
      generateNode(generator, ast);
      generator.deindent(needIndent);
      generator.push(`}`);
      const { code, map } = generator.context();
      return {
          ast,
          code,
          map: map ? map.toJSON() : undefined // eslint-disable-line @typescript-eslint/no-explicit-any
      };
  };

  function baseCompile(source, options = {}) {
      const assignedOptions = assign({}, options);
      // parse source codes
      const parser = createParser(assignedOptions);
      const ast = parser.parse(source);
      // transform ASTs
      transform(ast, assignedOptions);
      // generate javascript codes
      return generate(ast, assignedOptions);
  }

  exports.ERROR_DOMAIN = ERROR_DOMAIN;
  exports.LocationStub = LocationStub;
  exports.baseCompile = baseCompile;
  exports.createCompileError = createCompileError;
  exports.createLocation = createLocation;
  exports.createParser = createParser;
  exports.createPosition = createPosition;
  exports.defaultOnError = defaultOnError;
  exports.errorMessages = errorMessages;

  Object.defineProperty(exports, '__esModule', { value: true });

  return exports;

}({}));