src/optimizer/transforms/char-class-to-meta-transform.js
function rewriteWhitespaceRanges(path) {
  const {node} = path;

  let spacePath = null;
  let tPath = null;
  let nPath = null;
  let rPath = null;
  let fPath = null;

  node.expressions.forEach((expression, i) => {

    // Space
    if (isChar(expression, ' ')) {
      spacePath = path.getChild(i);
    }

    // \t
    else if (isMetaChar(expression, '\\t')) {
      tPath = path.getChild(i);
    }

    // \n
    else if (isMetaChar(expression, '\\n')) {
      nPath = path.getChild(i);
    }

    // \r
    else if (isMetaChar(expression, '\\r')) {
      rPath = path.getChild(i);
    }

    // \f
    else if (isMetaChar(expression, '\\f')) {
      fPath = path.getChild(i);
    }

  });

  // If we found the whole pattern, replace it.
  // Make \f optional.
  if (
    spacePath &&
    tPath &&
    nPath &&
    rPath
  ) {

    // Put \s in place of \n.
    nPath.node.value = '\\s';

    // Other paths are removed.
    spacePath.remove();
    tPath.remove();
    rPath.remove();

    if (fPath) {
      fPath.remove();
    }
  }
}
function rewriteWhitespaceRanges(path) {
  const {node} = path;

  let spacePath = null;
  let tPath = null;
  let nPath = null;
  let rPath = null;
  let fPath = null;

  node.expressions.forEach((expression, i) => {

    // Space
    if (isChar(expression, ' ')) {
      spacePath = path.getChild(i);
    }

    // \t
    else if (isMetaChar(expression, '\\t')) {
      tPath = path.getChild(i);
    }

    // \n
    else if (isMetaChar(expression, '\\n')) {
      nPath = path.getChild(i);
    }

    // \r
    else if (isMetaChar(expression, '\\r')) {
      rPath = path.getChild(i);
    }

    // \f
    else if (isMetaChar(expression, '\\f')) {
      fPath = path.getChild(i);
    }

  });

  // If we found the whole pattern, replace it.
  // Make \f optional.
  if (
    spacePath &&
    tPath &&
    nPath &&
    rPath
  ) {

    // Put \s in place of \n.
    nPath.node.value = '\\s';

    // Other paths are removed.
    spacePath.remove();
    tPath.remove();
    rPath.remove();

    if (fPath) {
      fPath.remove();
    }
  }
}
function rewriteWhitespaceRanges ( path ) { const { node } = path ; let spacePath = null ; let tPath = null ; let nPath = null ; let rPath = null ; let fPath = null ; node . expressions . forEach ( ( expression , i ) => { // Space if ( isChar ( expression , ' ' ) ) { spacePath = path . getChild ( i ) ; } // \t else if ( isMetaChar ( expression , '\\t' ) ) { tPath = path . getChild ( i ) ; } // \n else if ( isMetaChar ( expression , '\\n' ) ) { nPath = path . getChild ( i ) ; } // \r else if ( isMetaChar ( expression , '\\r' ) ) { rPath = path . getChild ( i ) ; } // \f else if ( isMetaChar ( expression , '\\f' ) ) { fPath = path . getChild ( i ) ; } } ) ; // If we found the whole pattern, replace it. // Make \f optional. if ( spacePath && tPath && nPath && rPath ) { // Put \s in place of \n. nPath . node . value = '\\s' ; // Other paths are removed. spacePath . remove ( ) ; tPath . remove ( ) ; rPath . remove ( ) ; if ( fPath ) { fPath . remove ( ) ; } } }
Rewrites whitespace ranges: [ \t\r\n\f] -> \s.
Rewrites whitespace ranges : [ \ t \ r \ n \ f ] - > \ s .