拆分表達式，但離開分離

Question

有這樣的表達，如：「！=」

name=="sometext" 
value!=4 

我想這樣的表達式與字符串分隔符，如「==」和分裂，並保持這些分隔，因此結果將是：

name=="sometext" -> [name] [==] ["sometext"] 
value!=4   -> [value] [!=] [4] 

怎麼可以用Boost或其他庫？

Answer 1

有了提升，我會用這個簡單的正則表達式：

(.*?)(==|!=)(.*) 

編輯：提供的表達是一個字符串。

編輯2：正則表達式

// (.*?)(==|!=)(.*) 
// 
// Match the regular expression below and capture its match into backreference number 1 «(.*?)» 
// Match any single character that is not a line break character «.*?» 
//  Between zero and unlimited times, as few times as possible, expanding as needed (lazy) «*?» 
// Match the regular expression below and capture its match into backreference number 2 «(==|!=)» 
// Match either the regular expression below (attempting the next alternative only if this one fails) «==» 
//  Match the characters 「==」 literally «==» 
// Or match regular expression number 2 below (the entire group fails if this one fails to match) «!=» 
//  Match the characters 「!=」 literally «!=» 
// Match the regular expression below and capture its match into backreference number 3 «(.*)» 
// Match any single character that is not a line break character «.*» 
//  Between zero and unlimited times, as many times as possible, giving back as needed (greedy) «*»