BinaryExpression: function()

in escodegen.js [1829:1862]
26 lines of code
10 McCabe index (conditional complexity)

        BinaryExpression: function (expr, precedence, flags) {
            var result, currentPrecedence, fragment, leftSource;
            currentPrecedence = BinaryPrecedence[expr.operator];

            if (currentPrecedence < precedence) {
                flags |= F_ALLOW_IN;
            }

            fragment = this.generateExpression(expr.left, currentPrecedence, flags);

            leftSource = fragment.toString();

            if (leftSource.charCodeAt(leftSource.length - 1) === 0x2F /* / */ && esutils.code.isIdentifierPartES5(expr.operator.charCodeAt(0))) {
                result = [fragment, noEmptySpace(), expr.operator];
            } else {
                result = join(fragment, expr.operator);
            }

            fragment = this.generateExpression(expr.right, currentPrecedence + 1, flags);

            if (expr.operator === '/' && fragment.toString().charAt(0) === '/' ||
            expr.operator.slice(-1) === '<' && fragment.toString().slice(0, 3) === '!--') {
                // If '/' concats with '/' or `<` concats with `!--`, it is interpreted as comment start
                result.push(noEmptySpace());
                result.push(fragment);
            } else {
                result = join(result, fragment);
            }

            if (expr.operator === 'in' && !(flags & F_ALLOW_IN)) {
                return ['(', result, ')'];
            }
            return parenthesize(result, currentPrecedence, precedence);
        },