Something resembling lambdas ish

typedef unsigned long size_t;
int printf(const char *fmt, ...);

typedef long (*func)();

typedef struct lambda {
    func function;
    void *captures[32];
} lambda;

#define CAPTURE(...) __VA_ARGS__
#define LAMBDA(name, captures, func...) func \
    lambda name = { (void *)&lambda_function, captures }

#define lambda_ctx void **captures
#define ctx(n, type) *(type *)captures[n]

#define lambda_call(lambda, args...) \
    lambda.function(lambda.captures, args)



int foo() {
    int x = 11, y = 100;
    char *foo = "Hello World";

    LAMBDA( q,
        CAPTURE({&x, &y, &foo}),
        int lambda_function(lambda_ctx, int x) {
            int a = 100;
            int *p = &ctx(1, int);

            char *str = ctx(2, char *);
            printf("%s\n", str);

            return a + ctx(0, int) + x;
        }
    );

    return (int)lambda_call(q, 20);
}