shape_value/
closure.rs

1//! Closure type definition (implementations in shape-runtime)
2//!
3//! This module contains only the DATA STRUCTURE for Closure.
4//! All method implementations live in shape-runtime to avoid circular dependencies.
5
6use crate::value_word::ValueWord;
7use shape_ast::ast::VarKind;
8use std::collections::HashMap;
9
10/// A closure captures a function definition along with its environment
11#[derive(Debug, Clone)]
12pub struct Closure {
13    /// The function ID (bytecode index)
14    pub function_id: u16,
15
16    /// Captured environment (variable bindings from enclosing scope)
17    pub captured_env: CapturedEnvironment,
18}
19
20impl PartialEq for Closure {
21    fn eq(&self, other: &Self) -> bool {
22        // Closures are equal if they have the same function ID
23        // Captured environment comparison is complex and not needed for now
24        self.function_id == other.function_id
25    }
26}
27
28/// Captured environment for a closure
29#[derive(Debug, Clone)]
30pub struct CapturedEnvironment {
31    /// Captured variable bindings
32    pub bindings: HashMap<String, CapturedBinding>,
33    /// Parent environment (for nested closures)
34    pub parent: Option<Box<CapturedEnvironment>>,
35}
36
37/// A captured variable binding
38#[derive(Debug, Clone)]
39pub struct CapturedBinding {
40    /// The captured value
41    pub value: ValueWord,
42    /// The kind of variable (let, var, const)
43    pub kind: VarKind,
44    /// Whether this binding is mutable (for 'var' declarations)
45    pub is_mutable: bool,
46}
shape_value/closure.rs

shape_value/
closure.rs
