Function WrapOnOperators

parser/unparser.go:622–640

WrapOnOperators specifies which operators to perform word wrapping on an output expression when its string length exceeds the column limit set by WrapOnColumn function. Word wrapping is supported on non-unary symbolic operators. Refer to operators.go for the full list This will replace any previou

(symbols ...string)

//
// This will replace any previously supplied operators instead of merging them.
func WrapOnOperators(symbols ...string) UnparserOption {
	return func(opt *unparserOption) (*unparserOption, error) {
		opt.operatorsToWrapOn = make(map[string]bool)
		for _, symbol := range symbols {
			_, found := operators.FindReverse(symbol)
			if !found {
				return nil, fmt.Errorf("Invalid unparser option. Unsupported operator: %s", symbol)
			}
			arity := operators.Arity(symbol)
			if arity < 2 {
				return nil, fmt.Errorf("Invalid unparser option. Unary operators are unsupported: %s", symbol)
			}

			opt.operatorsToWrapOn[symbol] = true
		}

		return opt, nil
	}
}

// WrapAfterColumnLimit dictates whether to insert a newline before or after the specified operator
// when word wrapping is performed.