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| author | _Tradam <[email protected]> | 2023-09-08 01:29:47 +0000 |
|---|---|---|
| committer | GitHub <[email protected]> | 2023-09-08 01:29:47 +0000 |
| commit | 3c76c7f3d5db3f9586a90d03f8fbb02d79de9acd (patch) | |
| tree | afbe4b540967223911f7c5de36559b82154f02f3 /misc/examples/box2.c | |
| parent | 0841165881871ee01b782129be681209aeed2423 (diff) | |
| parent | 1a72205fe05c2375cfd380dd8381a8460d9ed8d1 (diff) | |
| download | STC-modified-modified.tar.gz STC-modified-modified.zip | |
Diffstat (limited to 'misc/examples/box2.c')
| -rw-r--r-- | misc/examples/box2.c | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/misc/examples/box2.c b/misc/examples/box2.c deleted file mode 100644 index cba255d2..00000000 --- a/misc/examples/box2.c +++ /dev/null @@ -1,84 +0,0 @@ -// example: https://doc.rust-lang.org/rust-by-example/std/box.html -#include <stdio.h> - -typedef struct { - double x; - double y; -} Point; - -// A Rectangle can be specified by where its top left and bottom right -// corners are in space -typedef struct { - Point top_left; - Point bottom_right; -} Rectangle; - -#define i_val Point -#define i_no_cmp -#include <stc/cbox.h> // cbox_Point - -#define i_val Rectangle -#define i_no_cmp -#include <stc/cbox.h> // cbox_Rectangle - -// Box in box: -#define i_valboxed cbox_Point // NB: use i_valboxed when value is a cbox or carc! -#define i_type BoxBoxPoint -#define i_no_cmp -#include <stc/cbox.h> // BoxBoxPoint - -Point origin(void) { - return (Point){ .x=1.0, .y=2.0 }; -} - -cbox_Point boxed_origin(void) { - // Allocate this point on the heap, and return a pointer to it - return cbox_Point_make((Point){ .x=1.0, .y=2.0 }); -} - - -int main(void) { - // Stack allocated variables - Point point = origin(); - Rectangle rectangle = { - .top_left = origin(), - .bottom_right = { .x=3.0, .y=-4.0 } - }; - - // Heap allocated rectangle - cbox_Rectangle boxed_rectangle = cbox_Rectangle_make((Rectangle){ - .top_left = origin(), - .bottom_right = { .x=3.0, .y=-4.0 } - }); - // The output of functions can be boxed - cbox_Point boxed_point = cbox_Point_make(origin()); - - // Can use from(raw) and toraw instead: - BoxBoxPoint box_in_a_box = BoxBoxPoint_from(origin()); - - c_defer( - BoxBoxPoint_drop(&box_in_a_box), - cbox_Point_drop(&boxed_point), - cbox_Rectangle_drop(&boxed_rectangle) - ){ - printf("box_in_a_box: x = %g\n", BoxBoxPoint_toraw(&box_in_a_box).x); - - printf("Point occupies %d bytes on the stack\n", - (int)sizeof(point)); - printf("Rectangle occupies %d bytes on the stack\n", - (int)sizeof(rectangle)); - - // box size == pointer size - printf("Boxed point occupies %d bytes on the stack\n", - (int)sizeof(boxed_point)); - printf("Boxed rectangle occupies %d bytes on the stack\n", - (int)sizeof(boxed_rectangle)); - printf("Boxed box occupies %d bytes on the stack\n", - (int)sizeof(box_in_a_box)); - - // Copy the data contained in `boxed_point` into `unboxed_point` - Point unboxed_point = *boxed_point.get; - printf("Unboxed point occupies %d bytes on the stack\n", - (int)sizeof(unboxed_point)); - } -} |
