#[macro_export]
macro_rules! tree {
(@o $b:ident,) => {};
(@o $b:ident, ($expr:expr, $len:expr) $(,)?) => {{
$b.token($expr, $len)?;
}};
(@o $b:ident, ($expr:expr, $len:expr), $($rest:tt)*) => {{
$b.token($expr, $len)?;
$crate::tree!(@o $b, $($rest)*);
}};
(@o $b:ident, $expr:expr $(,)?) => {{
$b.token_empty($expr)?;
}};
(@o $b:ident, $expr:expr, $($rest:tt)*) => {{
$b.token_empty($expr)?;
$crate::tree!(@o $b, $($rest)*);
}};
(@o $b:ident, $expr:expr => { $($tt:tt)* } $(,)?) => {{
$b.open($expr)?;
$crate::tree!(@o $b, $($tt)*);
$b.close()?;
}};
(@o $b:ident, $expr:expr => { $($tt:tt)* }, $($rest:tt)*) => {{
$b.open($expr)?;
$crate::tree!(@o $b, $($tt)*);
$b.close()?;
$crate::tree!(@o $b, $($rest)*);
}};
($($tt:tt)*) => {{
let mut b = $crate::Builder::new();
$crate::tree!(@o b, $($tt)*);
b.build()?
}};
}
#[macro_export]
macro_rules! tree_with {
($($tt:tt)*) => {{
let mut b = $crate::Builder::new_with();
$crate::tree!(@o b, $($tt)*);
b.build()?
}};
}