Function notmuch_sys::notmuch_message_add_property 
                   
                       [−]
                   
               [src]
pub unsafe extern "C" fn notmuch_message_add_property(
message: *mut notmuch_message_t,
key: *const c_char,
value: *const c_char
) -> notmuch_status_t
Add a (key,value) pair to a message
@returns
- notmuch_status_t::ILLEGAL_ARGUMENT: key may not contain an '=' character.
- notmuch_status_t::NULL_POINTER: Neither key nor value may be NULL.
- notmuch_status_t::SUCCESS: No error occured.
@since libnotmuch 4.4 (notmuch 0.23)