How Can I Create a `std::string` Containing Embedded Null Characters in C ?

Creating a std::string with an Embedded Null: An In-Depth Examination

When constructing a std::string from a string literal that contains an embedded null character, such as "std::string my_string("a\0b");", only the first character may be present in the resulting string. To address this challenge, various approaches can be employed depending on the C version being used.

C 14 and Later

In C 14 onwards, string literals gained the ability to represent characters encompassing embedded nulls. By appending the suffix "s" to a string literal, it can be treated as a std::string literal rather than a C-string literal. For example:

std::string s = "pl-<pre class="brush:php;toolbar:false">std::string   x("pq\0rs");   // Two characters because input assumed to be C-String
std::string   x("pq\0rs",5); // 5 Characters as the input is a char array with 5 characters.

-op"s; // Notice the "s" at the end.

Pre-C 14 Solutions

Prior to C 14, the std::string constructor that takes a char* assumes the input is a C-string, which is null-terminated. To compensate, a different constructor must be used that accepts a char array and its length:

It's important to note that std::string in C is not null-terminated, unlike C-strings. However, the c_str() method can provide a pointer to an internal buffer that contains a null-terminated C-string representation.

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