rusty_cpp/analysis/
lifetimes.rs

1use crate::ir::Lifetime;
2use std::collections::HashMap;
3
4#[derive(Debug)]
5#[allow(dead_code)]
6pub struct LifetimeAnalyzer {
7    lifetimes: HashMap<String, Lifetime>,
8    constraints: Vec<LifetimeConstraint>,
9}
10
11#[derive(Debug, Clone)]
12#[allow(dead_code)]
13pub enum LifetimeConstraint {
14    Outlives(String, String),  // 'a: 'b (a outlives b)
15    Equal(String, String),     // 'a = 'b
16}
17
18impl LifetimeAnalyzer {
19    #[allow(dead_code)]
20    pub fn new() -> Self {
21        Self {
22            lifetimes: HashMap::new(),
23            constraints: Vec::new(),
24        }
25    }
26    
27    #[allow(dead_code)]
28    pub fn add_lifetime(&mut self, name: String, scope_start: usize, scope_end: usize) {
29        self.lifetimes.insert(
30            name.clone(),
31            Lifetime {
32                name,
33                scope_start,
34                scope_end,
35            },
36        );
37    }
38    
39    #[allow(dead_code)]
40    pub fn add_constraint(&mut self, constraint: LifetimeConstraint) {
41        self.constraints.push(constraint);
42    }
43    
44    #[allow(dead_code)]
45    pub fn check_constraints(&self) -> Result<(), Vec<String>> {
46        let mut errors = Vec::new();
47        
48        for constraint in &self.constraints {
49            match constraint {
50                LifetimeConstraint::Outlives(longer, shorter) => {
51                    if let (Some(l1), Some(l2)) = (self.lifetimes.get(longer), self.lifetimes.get(shorter)) {
52                        if l1.scope_end < l2.scope_end {
53                            errors.push(format!(
54                                "Lifetime '{}' does not outlive '{}'",
55                                longer, shorter
56                            ));
57                        }
58                    }
59                }
60                LifetimeConstraint::Equal(a, b) => {
61                    if let (Some(l1), Some(l2)) = (self.lifetimes.get(a), self.lifetimes.get(b)) {
62                        if l1.scope_start != l2.scope_start || l1.scope_end != l2.scope_end {
63                            errors.push(format!(
64                                "Lifetimes '{}' and '{}' are not equal",
65                                a, b
66                            ));
67                        }
68                    }
69                }
70            }
71        }
72        
73        if errors.is_empty() {
74            Ok(())
75        } else {
76            Err(errors)
77        }
78    }
79    
80    #[allow(dead_code)]
81    pub fn infer_lifetimes(&mut self) -> HashMap<String, Lifetime> {
82        // Simple lifetime inference algorithm
83        // In a real implementation, this would use a constraint solver
84        self.lifetimes.clone()
85    }
86}
rusty_cpp/analysis/lifetimes.rs

rusty_cpp/analysis/
lifetimes.rs
