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| author | tylov <[email protected]> | 2023-07-20 15:09:10 +0200 |
|---|---|---|
| committer | tylov <[email protected]> | 2023-07-20 15:12:29 +0200 |
| commit | 900295256d825fc323149cd223c49787f32a3696 (patch) | |
| tree | 6c79cf4209e3975bb6865e2940b9cb56ea469c73 /misc/examples/box2.c | |
| parent | 224a04f7fa7549ed94d2a1415eb25829e39a7cca (diff) | |
| download | STC-modified-900295256d825fc323149cd223c49787f32a3696.tar.gz STC-modified-900295256d825fc323149cd223c49787f32a3696.zip | |
Moved examples to sub-directories. Added cotask1.c cotask2.c examples.
Diffstat (limited to 'misc/examples/box2.c')
| -rw-r--r-- | misc/examples/box2.c | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/misc/examples/box2.c b/misc/examples/box2.c deleted file mode 100644 index eaab1c47..00000000 --- a/misc/examples/box2.c +++ /dev/null @@ -1,82 +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_key Point -#include <stc/cbox.h> // cbox_Point - -#define i_key Rectangle -#include <stc/cbox.h> // cbox_Rectangle - -// Box in box: -#define i_type BoxBoxPoint -#define i_keyboxed cbox_Point // NB: use i_keyboxed when value is a cbox or carc! -#define i_no_cmp -#include <stc/cbox.h> // BoxBoxPoint - -Point origin(void) { - return c_LITERAL(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(c_LITERAL(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(c_LITERAL(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)); - } -} |
