I use annotation macros in C to generate new C code from the AST.
For example in C, where the X macro uses the GNU annotate attribute, I do the
following:
```c
// Type definition (can access fields from script)
X(script) typedef struct {
int value;
} something_t; // yes I know it violates POSIX to use _t
// Forward declaration (only the interface is needed to generate script
bindings)
X(script) X(inc_op) something_t something_inc(const something_t something);
```
Then I wrote a code generator using libclang that reads the AST and generates
script bindings in C for every AST node that is annotated with "script".
I also use annotations to automatically generate transparent networking code,
save/load functionality etc.
The generated code may contain new structures and functions based on the
annotated ones which can be used from other C code afterwards.
Is something like this possible in Nim as well?
