Perl - 用正则表达式上的任意操作替换正则表达式匹配

Question

I have the following line in my Perl script:

s/\b(\w+)\b/ $replaces{$1} ? $replaces{$1} : $1 /g;

I want to find all words in the string and if the word is in the array of known words replace it else keep it (ideally I want to do an arbitrary operation on match, not just ternary operator).

To do so I attempt to use ternary operator. Perl treats ? and : as literal symbol and just concats these with variables (if defined).

How do I cause Perl to treat ?: inside the replace as ternary operator?

PS: I know that I can just perform operation on match in the next line of code but I want to keep it one liner for clarity.

Answer 1

你需要'e'（执行）限定符：

s/\b(\w+)\b/ $replaces{$1} ? $replaces{$1} : $1 /ge;