roussillon_type_system/value/
function.rs

1use crate::types::concept::Type;
2use crate::types::functional::FunctionDeclaration;
3use crate::value::concept::{DataValue, ValueCell};
4use crate::value::sequence::Sequence;
5
6pub type FunctionBody = fn(&Sequence) -> ValueCell;
7
8#[derive(Clone, Debug)]
9pub struct FunctionDefinition {
10    pub declaration: FunctionDeclaration,
11    execution: FunctionBody,
12    return_value: Option<ValueCell>,
13}
14
15impl FunctionDefinition {
16    pub fn new(declaration: FunctionDeclaration, execution: fn(&Sequence) -> ValueCell) -> Self {
17        Self {
18            declaration,
19            execution,
20            return_value: None,
21        }
22    }
23
24    pub fn call(&mut self, arguments: &Sequence) -> ValueCell {
25        self.return_value = Some((self.execution)(arguments));
26        self.unwrap_value()
27    }
28
29    pub fn has_value(&self) -> bool {
30        self.return_value.is_some()
31    }
32
33    pub fn unwrap_value(&self) -> ValueCell {
34        self.return_value.clone().expect("Return value used before the function has been called")
35    }
36}
37
38impl DataValue for FunctionDefinition {
39    fn data_type(&self) -> Type {
40        self.declaration.signature.clone()
41    }
42
43    fn raw(&self) -> Vec<u8> {
44        self.unwrap_value().borrow().raw()
45    }
46
47    fn set(&mut self, raw: &[u8]) {
48        self.call(&Sequence::from(self.declaration.signature.arguments.clone(), raw).unwrap());
49    }
50}
roussillon_type_system/value/function.rs

roussillon_type_system/value/
function.rs
