Makefile替换特殊字符

Question

我想用？更改％，反之亦然。以下两种方法都不起作用，原始字符串不会更改。

PayPal\Api\Payment Object ( 
    [_propMap:PayPal\Common\PayPalModel:private] => Array ( 
        [intent] => authorize [payer] => PayPal\Api\Payer Object ( 
            [_propMap:PayPal\Common\PayPalModel:private] => Array ( 
                [payment_method] => paypal 
            ) 
        ) 
        [redirect_urls] => PayPal\Api\RedirectUrls Object ( 
            [_propMap:PayPal\Common\PayPalModel:private] => Array ( 
                [return_url] => http://localhost/payment/payment-done 
                [cancel_url] => http://localhost/payment/payment-cancelled 
            ) 
        ) 
        [transactions] => Array ( 
            [0] => PayPal\Api\Transaction Object ( 
                [_propMap:PayPal\Common\PayPalModel:private] => Array ( 
                    [amount] => PayPal\Api\Amount Object ( 
                        [_propMap:PayPal\Common\PayPalModel:private] => Array ( 
                            [currency] => GBP 
                            [details] => PayPal\Api\Details Object ( 
                                [_propMap:PayPal\Common\PayPalModel:private] => Array ( 
                                    [shipping] => 1.20 
                                    [tax] => 1.30 
                                    [subtotal] => 17.50 
                                ) 
                            ) 
                            [total] => 125 
                        ) 
                    ) 
                    [item_list] => PayPal\Api\ItemList Object ( 
                        [_propMap:PayPal\Common\PayPalModel:private] => Array ( 
                            [items] => PayPal\Api\Item Object ( 
                                [_propMap:PayPal\Common\PayPalModel:private] => Array ( 
                                    [name] => Job advertisement on Laravel 
                                    [description] => Job advertisement on Laravel 
                                    [currency] => GBP 
                                    [quantity] => 1 
                                    [tax] => 0.20 
                                    [price] => 125 
                                ) 
                            ) 
                        ) 
                    ) 
                    [description] => Payment description 
                    [invoice_number] => 599cd8d03b626 
                ) 
            ) 
        ) 
    ) 
)

Answer 1

你无法在makefile中使用反斜杠转义（至少不在函数调用中）。您正在尝试使用文字字符串\%替换文字字符串\?，并且因为您的字符串不包含任何\%字符组合，所以没有任何反应。

对于subst，您可以直接使用它们：

test = $(subst %,?,$(varStrg1))

test = $(subst ?,%,$(varStrg2))

我相信subst函数中唯一特殊的字符是$，,和)。

对于patsubst，您无法将其用于此目的。