Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>afaik, you'll need to bake that info into your binary. just create a function which returns the sizeof and alignof in a struct, supports the types you must support, then call that function (or class method) for the info.</p> <p>The program below shows you that many of the primitives are just one character. So the bulk of the function's implementation could be a switch.</p> <pre><code>static void test(SEL sel) { Method method = class_getInstanceMethod([NSString class], sel); const char* const type = method_copyReturnType(method); printf("%s : %s\n", NSStringFromSelector(sel).UTF8String, type); free((void*)type); } int main(int argc, char *argv[]) { @autoreleasepool { test(@selector(init)); test(@selector(superclass)); test(@selector(isEqual:)); test(@selector(length)); return 0; } } </code></pre> <p>and you could then use this as a starting point:</p> <pre><code>typedef struct t_pair_alignof_sizeof { size_t align; size_t size; } t_pair_alignof_sizeof; static t_pair_alignof_sizeof MakeAlignOfSizeOf(size_t align, size_t size) { t_pair_alignof_sizeof ret = {align, size}; return ret; } static t_pair_alignof_sizeof test2(SEL sel) { Method method = class_getInstanceMethod([NSString class], sel); const char* const type = method_copyReturnType(method); const size_t length = strlen(type); if (1U == length) { switch (type[0]) { case '@' : return MakeAlignOfSizeOf(__alignof__(id), sizeof(id)); case '#' : return MakeAlignOfSizeOf(__alignof__(Class), sizeof(Class)); case 'c' : return MakeAlignOfSizeOf(__alignof__(signed char), sizeof(signed char)); ... </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POHow to interpret objective-c type specifier (e.g. returned by method_copyReturnType())?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USjustin
    1. USjustin
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POHow to interpret objective-c type specifier (e.g. returned by method_copyReturnType())?
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COSo the answer is: There is no way to do this without implementing it by myself. Correct?
      singulars
      1. PO
      1. USTilo Prütz
    2. CO@Tilo I've done some silly things with the runtime - there is no free solution that I know of, but the solution in my answer can be implemented quite easily if you know the types you must support. Of course, you can also wait and see if you get a more appropriate answer.
      singulars
      1. PO
      1. USjustin
    3. CO@Tilo - added a demo for this
      singulars
      1. PO
      1. USjustin
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload