charon_lib/ast/
gast_utils.rs

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
//! Implementations for [crate::gast]

use crate::ast::*;
use crate::llbc_ast;
use crate::ullbc_ast;

impl FunIdOrTraitMethodRef {
    pub fn mk_builtin(aid: BuiltinFunId) -> Self {
        Self::Fun(FunId::Builtin(aid))
    }
}

impl Body {
    pub fn as_unstructured(&self) -> Option<&ullbc_ast::ExprBody> {
        if let Self::Unstructured(v) = self {
            Some(v)
        } else {
            None
        }
    }
    pub fn as_unstructured_mut(&mut self) -> Option<&mut ullbc_ast::ExprBody> {
        if let Self::Unstructured(v) = self {
            Some(v)
        } else {
            None
        }
    }

    pub fn as_structured(&self) -> Option<&llbc_ast::ExprBody> {
        if let Self::Structured(v) = self {
            Some(v)
        } else {
            None
        }
    }
    pub fn as_structured_mut(&mut self) -> Option<&mut llbc_ast::ExprBody> {
        if let Self::Structured(v) = self {
            Some(v)
        } else {
            None
        }
    }
}

impl Locals {
    /// Creates a new variable and returns a place pointing to it.
    pub fn new_var(&mut self, name: Option<String>, ty: Ty) -> Place {
        let var_id = self.vars.push_with(|index| Var {
            index,
            name,
            ty: ty.clone(),
        });
        Place::new(var_id, ty)
    }

    /// Gets a place pointing to the corresponding variable.
    pub fn place_for_var(&self, var_id: VarId) -> Place {
        let ty = self.vars[var_id].ty.clone();
        Place::new(var_id, ty)
    }

    /// The place where we write the return value.
    pub fn return_place(&self) -> Place {
        self.place_for_var(VarId::new(0))
    }

    /// Locals that aren't arguments or return values.
    pub fn non_argument_locals(&self) -> impl Iterator<Item = (VarId, &Var)> {
        self.vars.iter_indexed().skip(1 + self.arg_count)
    }
}

impl std::ops::Index<VarId> for Locals {
    type Output = Var;
    fn index(&self, var_id: VarId) -> &Self::Output {
        &self.vars[var_id]
    }
}

impl TraitDecl {
    pub fn methods(&self) -> impl Iterator<Item = &(TraitItemName, Binder<FunDeclRef>)> {
        self.methods.iter()
    }
}
impl TraitImpl {
    pub fn methods(&self) -> impl Iterator<Item = &(TraitItemName, Binder<FunDeclRef>)> {
        self.methods.iter()
    }
}