警告：不推荐从字符串常量转换为“ACE_TCHAR *” [英] warning: deprecated conversion from string constant to ‘ACE_TCHAR*’

问题描述

  void尝试编写单元测试，其中我们将构造函数调用为以下形式的通用类： testConstructor（）{
 int argc = 2; 
 ACE_TCHAR * argv [] = {Input1，Input2}; 
 MyClass * myClass = new MyClass（argc，argv）; 
 / ** processing ** / 
} 
  

$ c> ACE_TCHAR * 与 char * 相同。上面的代码导致了

警告：从字符串常量转换为ACE_TCHAR *

我也尝试过：

  void testConstructor（）{
 int argc = 2; 
 ACE_TCHAR * argv [2]; 
 argv [0] =Input1; 
 argv [1] =Input2; 
 MyClass * myClass = new MyClass（argc，argv）; 
 / **处理** / 
} 
  

错误。

我在线阅读，可以通过使用

来减轻这种情况。

const ACE_TCHAR * argv [] = {Input1，Input2};

但是编译因为函数签名而失败。

编辑：我不允许修改第三方代码，我只为其编写单元测试。

任何想法？

解决方案

字符串常量是一个常量。

如果无法做到这一点，你可以使用显式类型转换器

p>

  ACE_TCHAR * argv [] = {const_cast< ACE_TCHAR *>（Input1），
 const_cast< ACE_TCHAR *> ;（Input2）}; 
  

或先将字符串指定为非常量字符数组

  char input1 [] =Input1; 
 char input2 [] =Input2; 
 ACE_TCHAR * argv [] = {input1，input2}; 
  

I'm attempting to write unit tests in which we call the constructor to a generic class in the form:

void testConstructor() {
    int argc = 2;
    ACE_TCHAR* argv[] = {"Input1", "Input2"};
    MyClass *myClass = new MyClass(argc, argv);
    /**processing**/
}

Think of ACE_TCHAR* the same as char*. The code above results in

warning: deprecated conversion from string constant to ‘ACE_TCHAR*’

I have also tried:

void testConstructor() {
    int argc = 2;
    ACE_TCHAR* argv[2];
    argv[0] = "Input1";
    argv[1] = "Input2";
    MyClass *myClass = new MyClass(argc, argv);
    /**processing**/
}

Which results in the same error.

I read online somewhere that this could be mitigated by using

const ACE_TCHAR* argv[] = {"Input1", "Input2"};

But then the compile fails because of the function signature.

Edit: I'm not allowed to modify the 3rd party code, I'm only writing unit tests for it.

Any ideas?

解决方案

A string constant is, as the name says, a constant. So to make the warning go away, the proper solution would indeed be to turn the pointer into a const pointer.

If that cannot be done, you can explicit typecasts

ACE_TCHAR* argv[] = {const_cast<ACE_TCHAR*>("Input1"),
                     const_cast<ACE_TCHAR*>("Input2")};

or assign the strings to non-constant char arrays first

char input1[] = "Input1";
char input2[] = "Input2";
ACE_TCHAR* argv[] = {input1, input2};

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