vendors/tempy.js/eos
    var scan = (input, options) => {
      const opts = options || {};
      const length = input.length - 1;
      const scanToEnd = opts.parts === true || opts.scanToEnd === true;
      const slashes = [];
      const tokens = [];
      const parts = [];
      let str = input;
      let index = -1;
      let start = 0;
      let lastIndex = 0;
      let isBrace = false;
      let isBracket = false;
      let isGlob = false;
      let isExtglob = false;
      let isGlobstar = false;
      let braceEscaped = false;
      let backslashes = false;
      let negated = false;
      let negatedExtglob = false;
      let finished = false;
      let braces = 0;
      let prev;
      let code;
      let token = { value: "", depth: 0, isGlob: false };
      const eos = () => index >= length;
      const peek = () => str.charCodeAt(index + 1);
      const advance = () => {
        prev = code;
        return str.charCodeAt(++index);
      };
      while (index < length) {
        code = advance();
        let next;
        if (code === CHAR_BACKWARD_SLASH) {
          backslashes = token.backslashes = true;
          code = advance();
          if (code === CHAR_LEFT_CURLY_BRACE) {
            braceEscaped = true;
          }
          continue;
        }
        if (braceEscaped === true || code === CHAR_LEFT_CURLY_BRACE) {
          braces++;
          while (eos() !== true && (code = advance())) {
            if (code === CHAR_BACKWARD_SLASH) {
              backslashes = token.backslashes = true;
              advance();
              continue;
            }
            if (code === CHAR_LEFT_CURLY_BRACE) {
              braces++;
              continue;
            }
            if (braceEscaped !== true && code === CHAR_DOT && (code = advance()) === CHAR_DOT) {
              isBrace = token.isBrace = true;
              isGlob = token.isGlob = true;
              finished = true;
              if (scanToEnd === true) {
                continue;
              }
              break;
            }
            if (braceEscaped !== true && code === CHAR_COMMA) {
              isBrace = token.isBrace = true;
              isGlob = token.isGlob = true;
              finished = true;
              if (scanToEnd === true) {
                continue;
              }
              break;
            }
            if (code === CHAR_RIGHT_CURLY_BRACE) {
              braces--;
              if (braces === 0) {
                braceEscaped = false;
                isBrace = token.isBrace = true;
                finished = true;
                break;
              }
            }
          }
          if (scanToEnd === true) {
            continue;
          }
          break;
        }
        if (code === CHAR_FORWARD_SLASH) {
          slashes.push(index);
          tokens.push(token);
          token = { value: "", depth: 0, isGlob: false };
          if (finished === true)
            continue;
          if (prev === CHAR_DOT && index === start + 1) {
            start += 2;
            continue;
          }
          lastIndex = index + 1;
          continue;
        }
        if (opts.noext !== true) {
          const isExtglobChar = code === CHAR_PLUS || code === CHAR_AT || code === CHAR_ASTERISK || code === CHAR_QUESTION_MARK || code === CHAR_EXCLAMATION_MARK;
          if (isExtglobChar === true && peek() === CHAR_LEFT_PARENTHESES) {
            isGlob = token.isGlob = true;
            isExtglob = token.isExtglob = true;
            finished = true;
            if (code === CHAR_EXCLAMATION_MARK && index === start) {
              negatedExtglob = true;
            }
            if (scanToEnd === true) {
              while (eos() !== true && (code = advance())) {
                if (code === CHAR_BACKWARD_SLASH) {
                  backslashes = token.backslashes = true;
                  code = advance();
                  continue;
                }
                if (code === CHAR_RIGHT_PARENTHESES) {
                  isGlob = token.isGlob = true;
                  finished = true;
                  break;
                }
              }
              continue;
            }
            break;
          }
        }
        if (code === CHAR_ASTERISK) {
          if (prev === CHAR_ASTERISK)
            isGlobstar = token.isGlobstar = true;
          isGlob = token.isGlob = true;
          finished = true;
          if (scanToEnd === true) {
            continue;
          }
          break;
        }
        if (code === CHAR_QUESTION_MARK) {
          isGlob = token.isGlob = true;
          finished = true;
          if (scanToEnd === true) {
            continue;
          }
          break;
        }
        if (code === CHAR_LEFT_SQUARE_BRACKET) {
          while (eos() !== true && (next = advance())) {
            if (next === CHAR_BACKWARD_SLASH) {
              backslashes = token.backslashes = true;
              advance();
              continue;
            }
            if (next === CHAR_RIGHT_SQUARE_BRACKET) {
              isBracket = token.isBracket = true;
              isGlob = token.isGlob = true;
              finished = true;
              break;
            }
          }
          if (scanToEnd === true) {
            continue;
          }
          break;
        }
        if (opts.nonegate !== true && code === CHAR_EXCLAMATION_MARK && index === start) {
          negated = token.negated = true;
          start++;
          continue;
        }
        if (opts.noparen !== true && code === CHAR_LEFT_PARENTHESES) {
          isGlob = token.isGlob = true;
          if (scanToEnd === true) {
            while (eos() !== true && (code = advance())) {
              if (code === CHAR_LEFT_PARENTHESES) {
                backslashes = token.backslashes = true;
                code = advance();
                continue;
              }
              if (code === CHAR_RIGHT_PARENTHESES) {
                finished = true;
                break;
              }
            }
            continue;
          }
          break;
        }
        if (isGlob === true) {
          finished = true;
          if (scanToEnd === true) {
            continue;
          }
          break;
        }
      }
      if (opts.noext === true) {
        isExtglob = false;
        isGlob = false;
      }
      let base = str;
      let prefix = "";
      let glob = "";
      if (start > 0) {
        prefix = str.slice(0, start);
        str = str.slice(start);
        lastIndex -= start;
      }
      if (base && isGlob === true && lastIndex > 0) {
        base = str.slice(0, lastIndex);
        glob = str.slice(lastIndex);
      } else if (isGlob === true) {
        base = "";
        glob = str;
      } else {
        base = str;
      }
      if (base && base !== "" && base !== "/" && base !== str) {
        if (isPathSeparator(base.charCodeAt(base.length - 1))) {
          base = base.slice(0, -1);
        }
      }
      if (opts.unescape === true) {
        if (glob)
          glob = utils.removeBackslashes(glob);
        if (base && backslashes === true) {
          base = utils.removeBackslashes(base);
        }
      }
      const state = {
        prefix,
        input,
        start,
        base,
        glob,
        isBrace,
        isBracket,
        isGlob,
        isExtglob,
        isGlobstar,
        negated,
        negatedExtglob
      };
      if (opts.tokens === true) {
        state.maxDepth = 0;
        if (!isPathSeparator(code)) {
          tokens.push(token);
        }
        state.tokens = tokens;
      }
      if (opts.parts === true || opts.tokens === true) {
        let prevIndex;
        for (let idx = 0; idx < slashes.length; idx++) {
          const n = prevIndex ? prevIndex + 1 : start;
          const i = slashes[idx];
          const value = input.slice(n, i);
          if (opts.tokens) {
            if (idx === 0 && start !== 0) {
              tokens[idx].isPrefix = true;
              tokens[idx].value = prefix;
            } else {
              tokens[idx].value = value;
            }
            depth(tokens[idx]);
            state.maxDepth += tokens[idx].depth;
          }
          if (idx !== 0 || value !== "") {
            parts.push(value);
          }
          prevIndex = i;
        }
        if (prevIndex && prevIndex + 1 < input.length) {
          const value = input.slice(prevIndex + 1);
          parts.push(value);
          if (opts.tokens) {
            tokens[tokens.length - 1].value = value;
            depth(tokens[tokens.length - 1]);
            state.maxDepth += tokens[tokens.length - 1].depth;
          }
        }
        state.slashes = slashes;
        state.parts = parts;
      }
      return state;
    };