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/// Allocator indirection to simplify lifetime management.
#[rustfmt::skip]
macro_rules! alloc_with {
($cx:expr, $span:expr) => {
#[allow(unused)]
macro_rules! alloc {
($value:expr) => {
$cx.arena.alloc($value).map_err(|e| {
$crate::compile::Error::new(
&*$span,
$crate::compile::ErrorKind::ArenaAllocError {
requested: e.requested,
},
)
})?
};
}
#[allow(unused)]
macro_rules! option {
($value:expr) => {
option!($value, |value| value)
};
($value:expr, |$pat:pat_param| $closure:expr) => {
match $value {
Some($pat) => {
Some(&*alloc!($closure))
}
None => {
None
}
}
};
}
#[allow(unused)]
macro_rules! iter {
($iter:expr) => {
iter!($iter, |value| value)
};
($iter:expr, |$pat:pat_param| $closure:expr) => {
iter!($iter, it, ExactSizeIterator::len(&it), |$pat| $closure)
};
($iter:expr, $len:expr, |$pat:pat_param| $closure:expr) => {
iter!($iter, it, $len, |$pat| $closure)
};
($iter:expr, $it:ident, $len:expr, |$pat:pat_param| $closure:expr) => {{
let mut $it = IntoIterator::into_iter($iter);
let mut writer = match $cx.arena.alloc_iter($len) {
Ok(writer) => writer,
Err(e) => {
return Err($crate::compile::Error::new(
&*$span,
$crate::compile::ErrorKind::ArenaAllocError {
requested: e.requested,
},
));
}
};
while let Some($pat) = $it.next() {
if let Err(e) = writer.write($closure) {
return Err($crate::compile::Error::new(
&*$span,
$crate::compile::ErrorKind::ArenaWriteSliceOutOfBounds { index: e.index },
));
}
}
writer.finish()
}};
}
#[allow(unused)]
macro_rules! alloc_str {
($value:expr) => {
match $cx.arena.alloc_str($value) {
Ok(string) => string,
Err(e) => return Err($crate::compile::Error::new(
&*$span,
$crate::compile::ErrorKind::ArenaAllocError {
requested: e.requested,
},
)),
}
};
}
#[allow(unused)]
macro_rules! alloc_bytes {
($value:expr) => {
match $cx.arena.alloc_bytes($value) {
Ok(bytes) => bytes,
Err(e) => return Err($crate::compile::Error::new(
&*$span,
$crate::compile::ErrorKind::ArenaAllocError {
requested: e.requested,
},
)),
}
};
}
};
}