Question

Having a strange problem making a new string class and assigning an array of char* to it in the GCC compiler. Source code:

#include "../Include/StdString.h"

StdString::StdString()
{
    //ctor
    internstr = std::string();
}

char* StdString::operator=(StdString other) {
    return other.cstr();
}

StdString StdString::operator+(StdString other) {
    StdString newstr = StdString();
    newstr.internstr = internstr+other.internstr;
    return newstr;
}

void StdString::operator=(char* other) {
    internstr = other;
}

StdString::~StdString()
{
    //dtor
}

char* StdString::cstr() {
    return (char*)internstr.c_str();
}

Error: conversion from char* to non-scalar type StdString requested.

How did std::string do their assignments?

Answer 1

std::string can do its conversion because it defines a conversion constructor. Something like this.

class std::string {
  // ...
std::string(const char *);
};

NOTE: the actual std::string is more complicated.

With the assignment operator you should be able to do

StdString str;
str = "hello";

but not

StdString str = "hello";