CODEWITHSUNDEEP
c++boost
user3626411
user3626411

Reputation: 198

C++ boost replace_all quote

I have a problem with boost::replace_all. My string looks like:

""Date"":1481200838,""Message"":""

And I would like it to look like:

"Date":1481200838,"Message":"

So i would like to replace "" with single ":

boost::replace_all(request_json_str, """", """);

But it doesn't work at all. Same with:

boost::replace_all(request_json_str, "\"\"", "\"");

How could I make this to work?

Upvotes: 1

Views: 14163

Answers (2)

Jonathan Mee
Jonathan Mee

Reputation: 38939

The boost::replace_all(request_json_str, "\"\"", "\"") already in your answer is the correct way to handle this using boost::replace_all: http://coliru.stacked-crooked.com/a/af7cbc753e16cf4f

I wanted to post an additional answer to say that given auto request_json_str = "\"\"Date\"\":1481200838,\"\"Message\"\":\"\""s the repeated quotations could also be removed without Boost (though not quite so eloquently, using unique, distance, and string::resize):

request_json_str.resize(distance(begin(request_json_str), unique(begin(request_json_str), end(request_json_str), [](const auto& a, const auto& b){ return a == '"' && b == '"'; })));

Upvotes: 1

Zafi
Zafi

Reputation: 629

You need to correctly escape the " character in your call to boost::replace_all!

// Example program
#include <iostream>
#include <string>
#include <algorithm>
#include <boost/algorithm/string/replace.hpp>

int main()
{
  std::string msg("\"Date\"\":1481200838,\"\"Message\"\":\"");
  boost::replace_all(msg, "\"\"", "\"");
  std::cout << msg << std::endl;
}

Upvotes: 3

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