Comments (2)
Could I make this work quickly? I need this; Maybe with a more recent branch?
from safer_ffi.
@DBLouis you surely can do this, it'll be a matter of "copy-pasting" the struct derive logic and replacing the occurrences of struct
with union
:
-
Copy-paste the proc-macro logic for the struct here:
safer_ffi/src/proc_macro/derives.rs
Lines 25 to 50 in b6f0759
and replace the
union
compile_error with that, replacingstruct_
withunion_
. -
Copy-paste (and add to the macro) the whole
macro_rules!
rule atsafer_ffi/src/layout/macros.rs
Lines 51 to 140 in b6f0759
Replacing, again,
struct
withunion
there input-of-the-macro-rule-wise, and also at the last line of the quoted snippet:safer_ffi/src/layout/macros.rs
Line 140 in b6f0759
-
Similarly, copy-paste
safer_ffi/src/layout/macros.rs
Lines 259 to 438 in b6f0759
struct
withenum
in the input part of the macro rule, and then you'll just have to change the definition offn is_valid
inside it totrue
(remove the "each field needs to be valid" logic that follows, since for a unionsafer-ffi
cannot know which variant is active (if you want to push it further, you can actually leave that logic be, but replacingtrue
withfalse
and the&&
with||
)).
from safer_ffi.
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