How to construct a std string from a std vector char

Question

Short of  the obvious  building a C style string first then using that to create a std  string  is there a quicker alternative  better  way to initialize a string from a vector of chars

User · Accepted Answer

Well  the best way is to use the following constructor   template lt class InputIterator gt  string  InputIterator begin  InputIterator end     which would lead to something like   std  vector lt char gt  v  std  string str v begin    v end

User · Answer

I think you can just do  std  string s  MyVector begin    MyVector end        where MyVector is your std  vector

User · Answer

Just for completeness  another way is std  string  amp v 0    although you need to ensure your string is null-terminated and std  string v data    is generally to be preferred     The difference is that you can use the former technique to pass the vector to functions that want to modify the buffer  which you cannot do with  data

User · Answer

std  string s v begin    v end       Where v is pretty much anything iterable   Specifically begin   and end   must return InputIterators

User · Answer

vector lt char gt  vec    fill the vector  std  string s vec begin    vec end

User · Answer

I like Stefan   s answer  Sep 11    13  but would like to make it a bit stronger   If the vector ends with a null terminator  you should not use  v begin    v end     you should use v data    or  amp v 0  for those prior to C  17     If v does not have a null terminator  you should use  v begin    v end      If you use begin   and end   and the vector does have a terminating zero  you   ll end up with a string  abc 0  for example  that is of length 4  but should really be only  abc

User · Answer

With C  11  you can do std  string v data    or  if your vector does not contain a   0  at the end  std  string v data    v size

[c++] How to construct a std::string from a std::vector<char>?

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