ripex 0.2.0

Multi-language structural parsing and fact extraction.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159

use super::bindings::BindingKind;
use super::symbols::SymbolTable;
use crate::csharp::ast::*;
use crate::csharp::visit::visitor::Visitor;
use crate::csharp::visit::walk::*;
use crate::span::Span;

#[derive(Debug, Clone)]
pub struct Scope {
    pub id: usize,
    pub parent: Option<usize>,
    pub children: Vec<usize>,
    pub kind: ScopeKind,
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum ScopeKind {
    Global,
    Function,
    Block,
    Namespace,
    Class,
    Struct,
    Interface,
}

#[derive(Debug, Clone)]
pub struct ScopeTree {
    scopes: Vec<Scope>,
    symbols: SymbolTable,
}

impl ScopeTree {
    pub fn new() -> Self {
        ScopeTree {
            scopes: Vec::new(),
            symbols: SymbolTable::new(),
        }
    }
    pub fn build(program: &Program) -> Self {
        let mut b = ScopeBuilder::new();
        walk_program(&mut b, program);
        b.tree
    }
    pub fn scopes(&self) -> &[Scope] {
        &self.scopes
    }
    pub fn symbols(&self) -> &SymbolTable {
        &self.symbols
    }
    pub fn root(&self) -> Option<&Scope> {
        self.scopes.first()
    }
}

impl Default for ScopeTree {
    fn default() -> Self {
        ScopeTree::new()
    }
}

struct ScopeBuilder {
    tree: ScopeTree,
    current_scope: usize,
}

impl ScopeBuilder {
    fn new() -> Self {
        let mut tree = ScopeTree::new();
        tree.scopes.push(Scope {
            id: 0,
            parent: None,
            children: Vec::new(),
            kind: ScopeKind::Global,
        });
        ScopeBuilder {
            tree,
            current_scope: 0,
        }
    }
    fn enter_scope(&mut self, kind: ScopeKind) -> usize {
        let id = self.tree.scopes.len();
        self.tree.scopes.push(Scope {
            id,
            parent: Some(self.current_scope),
            children: Vec::new(),
            kind,
        });
        self.tree.scopes[self.current_scope].children.push(id);
        let prev = self.current_scope;
        self.current_scope = id;
        prev
    }
    fn leave_scope(&mut self, prev: usize) {
        self.current_scope = prev;
    }
    fn declare(&mut self, name: &str, kind: BindingKind, span: Span) {
        self.tree
            .symbols
            .insert(name.to_string(), kind, span, self.current_scope);
    }
}

impl Visitor for ScopeBuilder {
    fn visit_func_decl(&mut self, decl: &FuncDecl) {
        self.declare(&decl.name, BindingKind::Method, decl.span);
        let prev = self.enter_scope(ScopeKind::Function);
        for p in &decl.params {
            self.declare(&p.name, BindingKind::Param, p.span);
        }
        if let Some(ref body) = decl.body {
            self.visit_block(body);
        }
        self.leave_scope(prev);
    }
    fn visit_class_decl(&mut self, decl: &ClassDecl) {
        self.declare(&decl.name, BindingKind::Class, decl.span);
        let prev = self.enter_scope(ScopeKind::Class);
        for m in &decl.members {
            self.visit_decl(m);
        }
        self.leave_scope(prev);
    }
    fn visit_struct_decl(&mut self, decl: &StructDecl) {
        self.declare(&decl.name, BindingKind::Struct, decl.span);
        let prev = self.enter_scope(ScopeKind::Struct);
        for m in &decl.members {
            self.visit_decl(m);
        }
        self.leave_scope(prev);
    }
    fn visit_interface_decl(&mut self, decl: &InterfaceDecl) {
        self.declare(&decl.name, BindingKind::Interface, decl.span);
    }
    fn visit_enum_decl(&mut self, decl: &EnumDecl) {
        self.declare(&decl.name, BindingKind::Enum, decl.span);
    }
    fn visit_field_decl(&mut self, decl: &FieldDecl) {
        self.declare(&decl.name, BindingKind::Var, decl.span);
    }
    fn visit_property_decl(&mut self, decl: &PropertyDecl) {
        self.declare(&decl.name, BindingKind::Property, decl.span);
    }
    fn visit_namespace_decl(&mut self, name: &str, members: &[Decl]) {
        self.declare(name, BindingKind::Namespace, Span::ZERO);
        let prev = self.enter_scope(ScopeKind::Namespace);
        for d in members {
            self.visit_decl(d);
        }
        self.leave_scope(prev);
    }
    fn visit_block(&mut self, block: &Block) {
        let prev = self.enter_scope(ScopeKind::Block);
        for s in &block.stmts {
            self.visit_stmt(s);
        }
        self.leave_scope(prev);
    }
}