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#[macro_export]
macro_rules! dyon_macro_items { ($($x:item)+) => ($($x)+) }
#[macro_export]
macro_rules! dyon_fn_pop {
($rt:ident $arg:ident : $t:ty) => {
let $arg: $t = $rt.pop()?;
};
($rt:ident $arg:ident : $t:ty, $($args:tt : $ts:ty),+) => {
dyon_fn_pop!($rt $($args: $ts),+);
let $arg: $t = $rt.pop()?;
};
}
#[macro_export]
macro_rules! dyon_fn {
(fn $name:ident () -> $rt:ty $b:block) => {
#[allow(non_snake_case)]
pub fn $name(rt: &mut $crate::Runtime) -> Result<(), String> {
fn inner() -> $rt {
$b
}
rt.push(inner());
Ok(())
}
};
(fn $name:ident ($($arg:tt : $t:ty),+) -> $rt:ty $b:block) => {
dyon_macro_items!{
#[allow(non_snake_case)]
pub fn $name(rt: &mut $crate::Runtime) -> Result<(), String> {
fn inner($($arg: $t),+) -> $rt {
$b
}
dyon_fn_pop!(rt $($arg: $t),+);
rt.push(inner($($arg),+));
Ok(())
}
}
};
(fn $name:ident () $b:block) => {
#[allow(non_snake_case)]
pub fn $name(_: &mut $crate::Runtime) -> Result<(), String> {
fn inner() {
$b
}
inner();
Ok(())
}
};
(fn $name:ident ($($arg:tt : $t:ty),+) $b:block) => {
dyon_macro_items!{
#[allow(non_snake_case)]
pub fn $name(rt: &mut $crate::Runtime) -> Result<(), String> {
fn inner($($arg: $t),+) {
$b
}
dyon_fn_pop!(rt $($arg: $t),+);
inner($($arg),+);
Ok(())
}
}
};
}
#[macro_export]
macro_rules! dyon_obj {
($t:tt { $($f:tt),* }) => {
dyon_macro_items!{
impl $crate::embed::PopVariable for $t {
fn pop_var(rt: &$crate::Runtime, var: &$crate::Variable) -> Result<Self, String> {
use dyon::embed::obj_field;
let var = rt.resolve(var);
if let &$crate::Variable::Object(ref obj) = var {
Ok($t {
$(
$f: obj_field(rt, obj, stringify!($f))?
),*
})
} else {
Err(rt.expected(var, stringify!($t)))
}
}
}
impl $crate::embed::PushVariable for $t {
fn push_var(&self) -> $crate::Variable {
use std::sync::Arc;
use std::collections::HashMap;
let mut obj: HashMap<_, $crate::Variable> = HashMap::new();
$(
obj.insert(Arc::new(stringify!($f).into()), self.$f.push_var())
;)*
$crate::Variable::Object(Arc::new(obj))
}
}
}
}
}