Re: I want to use the g++ template in the "C" gcc software

On 12/12/2024 09:37, aotto1968 wrote:

Hi,
 I create a C software and there is a requirement to use the g++ template *in* the gcc.
I do *not* want to use all the g++ "boilerplate" like special syntax, classes etc
I just want to use the template.
 goal:
 1. I already use "inline" code to replace "cpp-macro-like" syntax in the header.
2. NOW I *want* to replace a "cpp-macro" which use the *data-type* as an argument with a template.
 question.
 1. Is there a g++ switch to disable all the g++ features except of C source and template feature ?
2. Is there a gcc switch to add g++-template feature into gcc ?
3. is there an external software to add the c++-template feature into an existing C software ?
 thanks.

It might help if you give an example of what you are trying to achieve - it doesn't have to be valid code that can be compiled.
gcc has command-line options to disable some features of C and C++, but not like you are describing.  And C++ without classes is not the same as C anyway.  But you might find you can write your code in C++ and simply not use the features you don't want to use.
If you are trying to make type-generic function-like "things" in C, then you have to use macros.  But you can use modern features of C11 and C23 to make this safer and neater than in older C standards.  gcc also provides extensions that can help, if you are happy writing gcc-specific code.
You should do your own googling for information, tutorials and examples here, but these links will give you some starting points:
C11 _Generic selections:
<https://en.cppreference.com/w/c/language/generic>
C23 "typeof" and "auto" type inference:
<https://en.cppreference.com/w/c/language/typeof>
<https://en.cppreference.com/w/c/language/auto>
gcc extensions:
<https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html>
<https://gcc.gnu.org/onlinedocs/gcc/Typeof.html>