LinuxQuestions.org - [SOLVED] what? --> note: synthesized method 'options::options()' first required here

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what? --> note: synthesized method 'options::options()' first required here

In C++11, I have a struct here:
header:

Code:

typedef struct {

int i = 0;

int g = 0;



//to be compatible with vector.size() return data type

unsigned long int leftoff = 0;



char *path = nullptr; <-- I'm assuming that is right instead of NULL.



//holds file names

std::vector<std::string> dfile; <-- I have no idea how to initialize that



}options;





extern options opts;

Quote:

/media/data/projects/VSC/C++/codeblocks/mh5000/mh5000/options.h|21|warning: 'options::dfile' should be initialized in the member initialization list [-Weffc++]|

I got most of the list initialization (since C++11) thing figured out (kind of) except for that vector<string>, but I too am getting what that title says here in the cpp. it is not saying anything about my other struct set up the same with a lot more data in it, not yet anyways.

in the options.cpp it references this-> note: synthesized method 'options:: options()' first required here. (no space between the colons, I get a 'O' face if I keep it like that. )

Code:

options opts;

options:: options() <--- it is not a class it is a strut, don't let that little bit of knowledge fool you about my limited amount on this subject.

use: [noparse]options::options()[/noparse] to avoid :o faces

post at least something usable, to be able to reproduce what you are talking about. What I can see is syntactically incorrect and therefore useless. How do you think anyone will be able to tell you what's wrong with your real code?

Quote:

Originally Posted by pan64 (Post 5767353)

that's it my whole struct just stick it in a header file and make a main then compile it.

oh for you:
main

Code:

#include <iostream>

#include "strt.h"

int main(){

options opts;

return 0;

}

a header file

Code:

#ifndef STRT_H

#define STRT_H



#include <vector>

typedef struct {

int i = 0;

int g = 0;



//to be compatible with vector.size() return data type

unsigned long int leftoff = 0;

char *path = NULL;

//holds file names

std::vector<std::string> dfile;

}options;



extern options opts;

#endif

run

Code:

g++ -Weffc++ *.cpp

gets

Code:

[userx@void gurp]$ g++ -Weffc++ *.cpp

In file included from dummy.cpp:2:0:

strt.h: In constructor 'options::options()':

strt.h:18:2: warning: 'options::dfile' should be initialized in the member initialization list [-Weffc++]

 }options;

  ^~~~~~~

dummy.cpp: In function 'int main()':

dummy.cpp:5:10: note: synthesized method 'options::options()' first required here

  options opts;

          ^~~~

Quote:

Originally Posted by pan64 (Post 5767846)

http://www.geeksforgeeks.org/when-do...zer-list-in-c/
https://www.cprogramming.com/tutoria...lists-c++.html
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55837

well that last one explains everything, doesn't it?
I was actually thinking of just removing that or downgrading the standardization.
thanks for that last link.

makes me wonder what -W checks are really be trusted.