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#include <stdio.h>
#include "optional.h"
OPTIONALDEC(int);
OPTIONALDEC(float);
struct mine {
OPTIONAL(int) a;
OPTIONAL(int) b;
};
OPTIONAL(int)
ithas(void)
{
OPTIONAL(int) r = OPTSOME(10);
return r;
}
OPTIONAL(int)
ithasnt(void)
{
OPTIONAL(int) r = OPTNONE;
return r;
}
void
optput(OPTIONAL(float) *dst, float src)
{
opt_set_some(*dst, 6.9);
}
int
main(int argc, const char *argv[])
{
int a, b;
struct mine mine = {
.a = OPTSOME(69),
.b = OPTNONE,
};
OPTIONAL(float) y = OPTNONE;
OPTIONAL(float) z = OPTSOME(1.1);
float uy, uz, xy = opt_default(y, 6.9), xz = opt_default(z, 6.9);
float e = y.has ? y.data : 6.9;
float f = opt_default(y, 6.9);
opt_set_some(mine.b, 10);
opt_set_none(mine.a);
if (opt_unwrap(mine.a, a)) {
printf("has a = %d\n", a);
} else {
printf("doesn't have a\n");
}
if (opt_unwrap(mine.b, b)) {
printf("has b = %d\n", b);
} else {
printf("doesn't have b\n");
}
if (opt_unwrap(y, uy)) {
printf("has y = %f\n", uy);
} else {
printf("doesn't have y\n");
}
if (opt_unwrap(z, uz)) {
printf("has z = %f\n", uz);
} else {
printf("doesn't have z\n");
}
printf("xy = %f, xz = %f\n", xy, xz);
}
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