func()

in format.go [312:337]

• 22 lines of code
• 5 McCabe index (conditional complexity)

func (un *formatter) visitCallBinary(expr ast.Expr) error {
	c := expr.AsCall()
	fun := c.FunctionName()
	args := c.Args()
	lhs := args[0]
	// add parens if the current operator is lower precedence than the lhs expr operator.
	lhsParen := isComplexOperatorWithRespectTo(fun, lhs)
	rhs := args[1]
	// add parens if the current operator is lower precedence than the rhs expr operator,
	// or the same precedence and the operator is left recursive.
	rhsParen := isComplexOperatorWithRespectTo(fun, rhs)
	if !rhsParen && isLeftRecursive(fun) {
		rhsParen = isSamePrecedence(fun, rhs)
	}
	err := un.visitMaybeNested(lhs, lhsParen)
	if err != nil {
		return err
	}
	unmangled, found := operators.FindReverseBinaryOperator(fun)
	if !found {
		return fmt.Errorf("cannot unmangle operator: %s", fun)
	}

	un.writeOperatorWithWrapping(fun, unmangled)
	return un.visitMaybeNested(rhs, rhsParen)
}