Merge pull request 'Implemented built-in functios' (#3) from feature/builtins into master

Reviewed-on: https://git.ablecorp.us:443/AbleScript/able-script/pulls/3
This commit is contained in:
Erin 2022-02-13 22:16:43 +00:00 committed by ondra05
commit 7e2cba314b
2 changed files with 105 additions and 0 deletions

View file

@ -407,6 +407,7 @@ impl ExecEnv {
self.stack.pop();
res?;
}
Functio::Builtin(b) => b.call(args).map_err(|e| Error::new(e, span.clone()))?,
Functio::Chain { functios, kind } => {
let (left_functio, right_functio) = *functios;
match kind {

View file

@ -44,6 +44,7 @@ pub enum Functio {
params: Vec<String>,
body: Vec<Stmt>,
},
Builtin(BuiltinFunctio),
Chain {
functios: Box<(Functio, Functio)>,
kind: FunctioChainKind,
@ -59,12 +60,61 @@ impl Functio {
tape_len: _,
} => 0,
Functio::Able { params, body: _ } => params.len(),
Functio::Builtin(b) => b.arity,
Functio::Chain { functios, kind: _ } => functios.0.arity() + functios.1.arity(),
Functio::Eval(_) => 0,
}
}
}
#[derive(Clone)]
pub struct BuiltinFunctio {
function: Rc<dyn Fn(&[Rc<RefCell<Value>>]) -> Result<(), crate::error::ErrorKind>>,
arity: usize,
}
impl BuiltinFunctio {
pub fn new<F>(f: F, arity: usize) -> Self
where
F: Fn(&[Rc<RefCell<Value>>]) -> Result<(), crate::error::ErrorKind> + 'static,
{
Self {
function: Rc::new(f),
arity,
}
}
pub fn call(&self, args: &[Rc<RefCell<Value>>]) -> Result<(), crate::error::ErrorKind> {
(self.function)(args)
}
pub fn fn_addr(&self) -> usize {
Rc::as_ptr(&self.function) as *const () as _
}
}
impl std::fmt::Debug for BuiltinFunctio {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("BuiltinFunctio")
.field("function", &"built-in")
.field("arity", &self.arity)
.finish()
}
}
impl PartialEq for BuiltinFunctio {
fn eq(&self, other: &Self) -> bool {
Rc::ptr_eq(&self.function, &other.function) && self.arity == other.arity
}
}
impl Hash for BuiltinFunctio {
fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
self.fn_addr().hash(state);
self.arity.hash(state);
}
}
#[derive(Debug, PartialEq, Copy, Clone, Hash)]
pub enum FunctioChainKind {
Equal,
@ -134,6 +184,7 @@ impl Value {
.sum::<i32>()
+ body.len() as i32
}
Functio::Builtin(b) => (b.fn_addr() + b.arity) as _,
Functio::Chain { functios, kind } => {
let (lf, rf) = *functios;
Value::Functio(lf).into_i32()
@ -222,6 +273,7 @@ impl Value {
Value::Int((params + body) % 3 - 1).into_abool()
}
Functio::Builtin(b) => Value::Bool(b.fn_addr() % b.arity == 0).into_abool(),
Functio::Chain { functios, kind } => {
let (lhs, rhs) = *functios;
match kind {
@ -391,6 +443,22 @@ impl Value {
);
cart
}
Functio::Builtin(b) => {
let mut cart = HashMap::new();
cart.insert(
Value::Str("addr".to_owned()),
Rc::new(RefCell::new(Value::Cart(
Value::Int(b.fn_addr() as _).into_cart(),
))),
);
cart.insert(
Value::Str("arity".to_owned()),
Rc::new(RefCell::new(Value::Int(b.arity as _))),
);
cart
}
Functio::Chain { functios, kind } => {
let (lhs, rhs) = *functios;
match kind {
@ -440,6 +508,9 @@ impl Value {
tape_len,
} => (instructions.len() + tape_len) as _,
Functio::Able { params, body } => (params.len() + format!("{:?}", body).len()) as _,
Functio::Builtin(b) => {
(std::mem::size_of_val(b.function.as_ref()) + b.arity) as i32
}
Functio::Chain { functios, kind } => {
let (lhs, rhs) = *functios.clone();
match kind {
@ -564,6 +635,27 @@ impl ops::Sub for Value {
)
.into_functio(),
},
Functio::Builtin(b) => {
let arity = b.arity;
let resulting_arity = arity.saturating_sub(rhs.into_i32() as usize);
Functio::Builtin(BuiltinFunctio::new(
move |args| {
b.call(
&args
.iter()
.cloned()
.take(resulting_arity)
.chain(std::iter::repeat_with(|| {
Rc::new(RefCell::new(Value::Nul))
}))
.take(arity)
.collect::<Vec<_>>(),
)
},
resulting_arity,
))
}
Functio::Chain { functios, .. } => {
let rhs = rhs.into_functio();
let (a, b) = *functios;
@ -692,6 +784,10 @@ impl ops::Div for Value {
.collect(),
}
}
Functio::Builtin(b) => Functio::Builtin(BuiltinFunctio {
arity: b.arity + rhs.into_i32() as usize,
..b
}),
Functio::Chain { functios, kind } => {
let functios = *functios;
Functio::Chain {
@ -765,6 +861,13 @@ impl ops::Not for Value {
Functio::Able { params, body }
}
Functio::Builtin(b) => {
let arity = b.arity;
Functio::Builtin(BuiltinFunctio::new(
move |args| b.call(&args.iter().cloned().rev().collect::<Vec<_>>()),
arity,
))
}
Functio::Chain { functios, kind } => {
let (a, b) = *functios;
Functio::Chain {
@ -858,6 +961,7 @@ impl Display for Value {
body,
)
}
Functio::Builtin(b) => write!(f, "builtin @ {}", b.fn_addr()),
Functio::Chain { functios, kind } => {
let (a, b) = *functios.clone();
write!(