Error array used as initializer - Исправление ошибок и поиск оптимальных решений проблем

Basic Infos

[ x] This issue complies with the issue POLICY doc.
I have read the documentation at readthedocs and the issue is not addressed there.
I have tested that the issue is present in current master branch (aka latest git).
I have searched the issue tracker for a similar issue.
If there is a stack dump, I have decoded it.
I have filled out all fields below.

Platform

Hardware: [ESP-12] [NodeMCU v09/v1]
Core Version: [2.6.3]
Development Env: [Arduino IDE 1.8.12]
Operating System: [Windows|MacOS]

Settings in IDE

Below does not matter its a toolchain problem

Module: [Generic ESP8266 Module|Nodemcu|]
Flash Mode: [dout]
Flash Size: [4MB/1MB]
lwip Variant: [v1.4|v2 Lower Memory|Higher Bandwidth]
Reset Method: [ck|nodemcu]
Flash Frequency: [40Mhz]
CPU Frequency: [80Mhz|160MHz]
Upload Using: [SERIAL]
Upload Speed: [115200|other] (serial upload only)

Problem Description

The foliowing (condensed for reproduction) code compiles fine on all Arduinos (UNO/pro/Nano…) avr 1.8.2 and the ESP32 core 1.04. It fails to compile on the esp8266 core. It seems to be a compiler related tool chain problem.

Setup: Basic *.ino file with include to the header file and the following header with a simple class definition arraytest.h

#ifndef ARRAYTEST_H_
#define ARRAYTEST_H_
/******************************************************************************************************/
#define MAX_A_FUNCTIONS 29
/******************************************************************************************************/
/** @brief Data associated to each entry in the A roster.*/
class A_Manager {
  private:
    uint8_t _aKey ;         /**< The numeric place (0-10 = slot number) of the part on the roster (=unique ID) */
    const char* _typeField;                            /** part - Added for more flexibility */
    const  char* _subTypeField;                 /** Added for more flexibility for part -  active for the selected part */
    char _functionMap[MAX_A_FUNCTIONS + 1] = ""; /** < Current status of the functions: 0 for Off, 1 for On - Length of array is MAX_A_FUNCTIONS */

  public:
    char functionMap[MAX_A_FUNCTIONS + 1] = "";
    A_Manager(uint8_t , const char* ,  const char*,  char []);
    ~A_Manager();
    uint8_t getAKey() const ;
};

/***************************************** CPP part *************************************************/

A_Manager::A_Manager(uint8_t aKey, const char* typeField = "APart", const char* subTypeField = "ASubPart",  char functionMap[MAX_A_FUNCTIONS+1] = {''})
{
  aKey = _aKey;
  typeField = _typeField;
  subTypeField = _subTypeField;
  strcpy (functionMap, _functionMap);
  for (uint8_t functionID = 0; functionID <= MAX_A_FUNCTIONS; functionID++) {
    functionMap[functionID] = '0';
  }
}

A_Manager::~A_Manager() {}

uint8_t A_Manager::getAKey() const {
  return _aKey;
}

#endif /* ARRAYTEST_H_ */

Debug Messages

In file included from C:DevArduinoESP8266_Dev_Exampleserror_array_classerror_array.ino:1:0:

c:XXXXarduino_build_XXXXsketcharraytest.h: In constructor 'A_Manager::A_Manager(uint8_t, const char*, const char*, char*)':

arraytest.h:22:151: error: array used as initializer

 A_Manager::A_Manager(uint8_t aKey, const char* typeField = "APart", const char* subTypeField = "ASubPart",  char functionMap[MAX_A_FUNCTIONS+1] = {''})

arraytest.h:22:151: error: array used as initializer

exit status 1
array used as initializer

Seems like a similar error the gnu compilers had until 5.03
c++11 is activated in platform.txt

There is no option to change the program as it works in production on all other named platforms for a year.
If you need more Info -glad to help

Источник

ratatyq

3 / 3 / 1

Регистрация: 16.09.2015

Сообщений: 121

21.01.2016, 16:56. Показов 18748. Ответов 3

Метки нет (Все метки)

Вот собственно сама ошибка: «array must be initialized with a brace-enclosed initializer»
Сама программа должна выводить квадрат в консоль который нарисован в массиве
Код:
main.cpp

C++

#include <iostream>
#include "draw.h"
 
using namespace std;
 
int main() {
    Draw d;
    d.draw();
    return 0;
}

draw.cpp

C++

#include <cstring>
#include <iostream>
 
using namespace std;
 
class Draw {
private:
    string square[5][5][5][5] {
        {"*","*","*","*","*"},
        {"*"," "," "," ","*"},
        {"*"," "," "," ","*"},
        {"*","*","*","*","*"}
    };
public:
 
    void draw() {
        for(int x = 0; x < 5; x++)
            for(int x2 = 0; x2 < 5; x++)
                for(int x3 = 0; x3 < 5; x3++)
                    for(int x4 = 0; x4< 5; x++)
                        cout << square[x][x2][x3][x4];
    }
};

__________________
Помощь в написании контрольных, курсовых и дипломных работ, диссертаций здесь

Programming Эксперт 94731 / 64177 / 26122 Регистрация: 12.04.2006 Сообщений: 116,782	21.01.2016, 16:56
3

Croessmah

Don’t worry, be happy

17781 / 10545 / 2036

Регистрация: 27.09.2012

Сообщений: 26,516

Записей в блоге: 1

21.01.2016, 17:12

C++

class Draw {
private:
    string square[5][5] {
        {"*","*","*","*","*"},
        {"*","*","*","*","*"},
        {"*","*","*","*","*"},
        {"*","*","*","*","*"}
    };
public:
 
    void draw() {
        for(int x = 0; x < 5; x++){
            for(int x2 = 0; x2 < 5; x2++){
                cout << square[x][x2];
            }
            std::cout << std::endl ;
        }
    }
};

3 / 3 / 1

Регистрация: 16.09.2015

Сообщений: 121

21.01.2016, 17:56

[ТС]

Croessmah, Спасибо помогло, вот только не пойму если мы сделали 4-ех значный массив то почему мы указали всего две скобки([][]) заместо четырех([][][][])?

0 / 0 / 0

Регистрация: 29.03.2019

Сообщений: 1

30.03.2019, 10:35

Массив двухзначный так-то был изначально

Источник

Description

Johannes Schaub

2010-03-20 03:06:23 UTC

Fails to compile, but should work:

struct A { 
  char x[4]; 
  A():x("bug") { } 
};

Error i get is:

"main.cpp:3: error: array used as initializer"

Comment 1

Christopher Yeleighton

2010-08-27 18:06:28 UTC

(In reply to comment #0)
> Fails to compile, but should work:
> 
> struct A { 
>   char x[4]; 
>   A():x("bug") { } 
> };
> 
> Error i get is:
> 
> "main.cpp:3: error: array used as initializer"
> 

Why do you think it should work?  
For example, the following equivalent code is invalid as well:

char x [4] ("bug");

Comment 2

Johannes Schaub

2010-08-28 14:39:58 UTC

(In reply to comment #1)
> (In reply to comment #0)
> > Fails to compile, but should work:
> > 
> > struct A { 
> >   char x[4]; 
> >   A():x("bug") { } 
> > };
> > 
> > Error i get is:
> > 
> > "main.cpp:3: error: array used as initializer"
> > 
> 
> Why do you think it should work?  
> For example, the following equivalent code is invalid as well:
> 
> char x [4] ("bug");
> 

This code is equivalent and is valid. At least, I don't see the Standard forbidding it. GCC is the only compiler I tested (comeau/edg, clang) that rejects it.

Comment 3

Johannes Schaub

2010-10-30 09:41:36 UTC

(In reply to comment #2)
> (In reply to comment #1)
> > (In reply to comment #0)
> > > Fails to compile, but should work:
> > > 
> > > struct A { 
> > >   char x[4]; 
> > >   A():x("bug") { } 
> > > };
> > > 
> > > Error i get is:
> > > 
> > > "main.cpp:3: error: array used as initializer"
> > > 
> > 
> > Why do you think it should work?  
> > For example, the following equivalent code is invalid as well:
> > 
> > char x [4] ("bug");
> > 
> 
> This code is equivalent and is valid. At least, I don't see the Standard
> forbidding it. GCC is the only compiler I tested (comeau/edg, clang) that
> rejects it.

I'm not actually sure anymore about the validity of this code. One can make a point about the initializer not being a mere string literal.

At least the draft n3126 makes a difference of this, in that an initializer like "({a, b, c})" is not regarded as a braced-init-list, but rather as a parenthesized expression-list where the initializer list is handed as one argument. So I'm unsure whether an initializer like `("foo")` should be regarded as a string literal or not.

I think I will send an issue report about this.

Comment 4

Johannes Schaub

2011-05-14 16:18:58 UTC

(In reply to comment #3)
> (In reply to comment #2)
> > (In reply to comment #1)
> > > (In reply to comment #0)
> > > > Fails to compile, but should work:
> > > > 
> > > > struct A { 
> > > >   char x[4]; 
> > > >   A():x("bug") { } 
> > > > };
> > > > 
> > > > Error i get is:
> > > > 
> > > > "main.cpp:3: error: array used as initializer"
> > > > 
> > > 
> > > Why do you think it should work?  
> > > For example, the following equivalent code is invalid as well:
> > > 
> > > char x [4] ("bug");
> > > 
> > 
> > This code is equivalent and is valid. At least, I don't see the Standard
> > forbidding it. GCC is the only compiler I tested (comeau/edg, clang) that
> > rejects it.
> 
> I'm not actually sure anymore about the validity of this code. One can make a
> point about the initializer not being a mere string literal.
> 
> At least the draft n3126 makes a difference of this, in that an initializer
> like "({a, b, c})" is not regarded as a braced-init-list, but rather as a
> parenthesized expression-list where the initializer list is handed as one
> argument. So I'm unsure whether an initializer like `("foo")` should be
> regarded as a string literal or not.
> 
> I think I will send an issue report about this.

Subsequent discussion with Jason showed that this is covered by 8.5p13:

   The form of initialization (using parentheses or =) is generally 
   insignificant, but does matter when the initializer or the entity 
   being initialized has a class type;

As this is an array, the text in the Standard in general has to be interpreted that a "=" or a "(..)" initializer are equivalent, unless otherwise stated. 

So this is indeed a GCC bug (both that it rejects the member initialization and the parenthesized non-member initialization).

Comment 5

Andrew Pinski

2012-01-28 05:43:59 UTC

Confirmed.

Comment 6

Paolo Carlini

2014-05-26 10:37:51 UTC

Mine.

Comment 7

paolo@gcc.gnu.org

2014-06-04 22:31:11 UTC

Author: paolo
Date: Wed Jun  4 22:30:39 2014
New Revision: 211248

URL: http://gcc.gnu.org/viewcvs?rev=211248&root=gcc&view=rev
Log:
/cp
2014-06-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/43453
	* typeck.c (cp_build_modify_expr): Handle array of characters
	initialized by a string literal.
	* decl.c (check_initializer): Handle parenthesized string literal
	as initializer.
	* typeck2.c (store_init_value): Remove redundant check.

/testsuite
2014-06-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/43453
	* g++.dg/init/pr43453.C: New.

Added:
    trunk/gcc/testsuite/g++.dg/init/pr43453.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/decl.c
    trunk/gcc/cp/typeck.c
    trunk/gcc/cp/typeck2.c
    trunk/gcc/testsuite/ChangeLog

Comment 8

Paolo Carlini

2014-06-04 22:32:01 UTC

Fixed for 4.10.0.

Источник

Массив ошибок используется в качестве инициализатора, и я не знаю ошибки

Ошибка в конструкторе класса manejo.cpp, ошибка «manejo.cpp:3:16: ошибка: массив используется как инициализатор», и я не знаю, где эта ошибка.

к сообщению прилагается исходный код класса manejo.hpp и реализация manejo.cpp, спасибо

#include "manejo.hpp"

manejo::manejo(){}
manejo::~manejo(){}

ГЭС

#ifndef __MANEJO_HPP
#define _MANEJO_HPP

#include <iostream>
#include <fstream>
#include <vector>
#include <string>

using namespace std;
using std::vector;
using std::string;

class manejo{

private:

     char cadena[128]="";
     vector <string> linea;
     long cantidadPD = 0;
     vector <string> palabras;
     int Creglas = 0;
     vector <string> reglas;
     long atoi(const char *str);


public:

     manejo();
     ~manejo();
     void EstablecerVariables();
     int StoInt (string numero);

};

#endif

Эта медитация

 char cadena[128]="";

не является допустимым в традиционном С++ (это допустимо в С++ 11, но очевидно, что вы его не используете, потому что иначе вы не получили бы эту ошибку). Удалить ="", инициализируйте элементы данных в своем конструкторе, а не в своем классе. Например

manejo::manejo()
{
    cadena[0] = '';
    ...
}

ответ дан 13 окт ’13, 16:10

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