@coffeelint/cli/lib/rules/prefer_logical_operator.js

Lint your CoffeeScript

(function() {
  var PreferLogicalOperator;

  module.exports = PreferLogicalOperator = (function() {
    class PreferLogicalOperator {
      lintToken(token, tokenApi) {
        var actual_token, context, first_column, last_column, line;
        // Compare the actual token with the lexed token.
        ({first_column, last_column} = token[2]);
        line = tokenApi.lines[tokenApi.lineNumber];
        actual_token = line.slice(first_column, +last_column + 1 || 9e9);
        if (token[0] === 'COMPOUND_ASSIGN' && (actual_token === 'or=' || actual_token === 'and=')) {
          actual_token = token.origin[1];
        }
        context = (function() {
          switch (actual_token) {
            case 'is':
              return 'Replace "is" with "=="';
            case 'isnt':
              return 'Replace "isnt" with "!="';
            case 'or':
              return 'Replace "or" with "||"';
            case 'and':
              return 'Replace "and" with "&&"';
            case 'not':
              return 'Replace "not" with "!"';
            case 'yes':
              return 'Replace "yes" with true';
            case 'on':
              return 'Replace "on" with true';
            case 'off':
              return 'Replace "off" with false';
            case 'no':
              return 'Replace "no" with false';
            default:
              return void 0;
          }
        })();
        if (context != null) {
          return {token, context};
        }
      }

    };

    PreferLogicalOperator.prototype.rule = {
      type: 'style',
      name: 'prefer_logical_operator',
      level: 'ignore',
      message: 'Don\'t use is, isnt, not, and, or, yes, on, no, off',
      doubleNotLevel: 'ignore',
      description: `This rule prohibits is, isnt, not, and, or, yes, on, no, off.
Use ==, !=, !, &&, ||, true, false instead.`
    };

    PreferLogicalOperator.prototype.tokens = ['COMPARE', 'UNARY', 'BOOL', 'COMPOUND_ASSIGN', '&&', '||'];

    return PreferLogicalOperator;

  }).call(this);

}).call(this);