C and C ++ object-oriented topics (8) -- More advanced pre-processor PHP

: This article mainly introduces the object-oriented topics of C and C ++ (8)-more advanced pre-processor PHP. if you are interested in the PHP Tutorial, refer to it. List of articles in this column

1. what is object-oriented?

2. the C language can also implement object-oriented

III. non-elegant features in C ++

4. solve encapsulation and avoid interfaces

5. use templates properly to avoid code redundancy

6. C ++ reflection

VII. Singleton mode solves the difficult problem of constructing sequence of static member objects and global objects

8. more advanced pre-processor PHP

8. more advanced pre-processor PHP

The macro of C ++ is very difficult to use in some cases, such as expanding the code into the following:

Macro (A, B, C, D)

=>

Func ("A", );
Func ("B", B );
Func ("C", C );
Func ("D", D );

Test ();
Test (B );
Test (C );
Test (D );

This is too difficult for Macros. in order to implement complicated macros, we hope to use a more advanced pre-processor to implement this function.

We use PHP for code preprocessing and use PHP code as a macro of C ++.
Of course, you can also use python for code generation, but because php is embedded, it may be easier to process it. of course, other languages can also be configured with templates.

/* main.php */
  #include 
  
   usingnamespacestd;int func(int a, int b) {    
    }int main() {    cout << func(1, 2) << endl;    return0;}
  

Run the following command to generate the C ++ code:

php main.php > main.cpp

Okay, the following is the same as normal project compilation. you can even write php commands to makefile to automatically generate