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macros.rs
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macros.rs
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macro_rules! objc_class_type {
($obj:ident $(<$lifetime:lifetime>)?) => {
objc_class_type!($obj $(<$lifetime>)?, stringify!($obj));
};
($obj:ident $(<$lifetime:lifetime>)?, $class:expr) => {
objc_class_type!(@processed
$obj $(<$lifetime>)?,
$class,
concat!("OBJC_CLASS_$_", $class)
);
};
(@processed $obj:ident <$lifetime:lifetime>, $class:expr, $class_symbol:expr) => {
impl<$lifetime> $crate::objc::ClassType<$lifetime> for $obj<$lifetime> {
#[inline]
unsafe fn direct_class() -> &'static $crate::objc::Class {
$crate::_objc_class!(@ $class_symbol)
}
}
};
(@processed $obj:ident, $class:expr, $class_symbol:expr) => {
impl $crate::objc::ClassType<'static> for $obj {
#[inline]
unsafe fn direct_class() -> &'static $crate::objc::Class {
$crate::_objc_class!(@ $class_symbol)
}
}
};
}
macro_rules! objc_subclass {
(
$(#[$meta:meta])+
$vis:vis class $a:ident : $b:ty ;
) => {
subclass! {
$(#[$meta])+
$vis class $a : $b ;
}
impl $crate::objc::ObjectType<'static> for $a {}
objc_class_type!($a);
};
(
$(#[$meta:meta])+
$vis:vis class $a:ident <$lifetime:lifetime> : $b:ty ;
) => {
subclass! {
$(#[$meta])+
$vis class $a <$lifetime> : $b ;
}
impl<$lifetime> $crate::objc::ObjectType<$lifetime> for $a<$lifetime> {}
objc_class_type!($a <$lifetime>);
};
}
// This macro is intentionally undocumented to ensure it is not publicly
// exported.
#[allow(unused)]
macro_rules! objc_object_wrapper {
(
$(#[$meta:meta])+
$vis:vis wrapper $wrapper:ident : $target:ty ;
) => {
object_wrapper! {
$(#[$meta])+
$vis wrapper $wrapper: $target;
}
impl $crate::objc::ObjectType<'static> for $wrapper {}
};
(
$(#[$meta:meta])+
$vis:vis wrapper $wrapper:ident <$lifetime:lifetime> : $target:ty ;
) => {
object_wrapper! {
$(#[$meta])+
$vis wrapper $wrapper <$lifetime>: $target;
}
impl<$lifetime> $crate::objc::ObjectType<$lifetime> for $wrapper<$lifetime> {}
};
}