Anyone knows how to do it...

[CosmoGreco]

This is possible to achieve in C++. I just can’t figure out how to do it:

Dynamically generate a line of code stored in a string at run-time.

Example:

char *pszVar = “int iVar = 10;”;

Then, how to make the contents of pszVar come alive like a macro substitution so it will be a line of code like?

int iVar = 10;

Thanks,
Cos

 

[georgemih]

What does "come alive" mean? And "come alive" where and when? You need to explain in more detail what you're trying to do...

 

[palbano]

Cosmo,

How many times are you going to ask the same question?

I'm sorry if you don't like the answers you have been provided with but they are correct.

 

[CosmoGreco]

georgemih,

I mean being able to perform a kind of macro substitution so the contents of pszVar is seeing at Run time as the statement int iVar = 10;

OK, you say it’s not possible to compile code at run-time perhaps, but it was accomplish before and I just would like to know the mechanisms or if there is any function available you guys know that make C++ transform a string containing a statement in a valid C++ line of code.

Other than that, this new question, I believe, was legit.

Although the other question I posted before “How to convert an arithmetic string expression to an int result” is related to this one, my goal at that time was to find a solution to convert a mathematical string operation using a most simple manner, in opposite of this new question that seeks to explorer a way to execute code generated dynamically, which would open innumerous possibilities to simplify our lives as programmers as I have seen before.

Pete, I appreciated your help by taking your time and answering my questions, but I want to believe that like me, most programmers don’t give up easily when seeing only a couple of answers that were indeed correct as you mentioned (I never said it wasn’t) but not necessary providing solutions. So, I searched for other ways and found a solution for the “arithmetic string expression” problem and I was happy to go back to my thread, post the solution and share it with you all.

However, that was a huge effort for the programmer who made the solution and I wanted to insist that there is perhaps a better way to do things and share with the forum.

Thanks for the comments!

Regards,
Cosmo

 

[BoulderBum]

Is it possible to have a stream write new code to a .cpp file and then call the VC++ compiler using COM stuff or something?