luaur-analysis 0.1.3

Luau type checker and type inference (Rust).
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

//! Node: `cxx:Function:Luau.Analysis:Analysis/src/ToString.cpp:1958:to_string`
//! Source: `Analysis/src/ToString.cpp:1958-2058` (hand-ported)

use crate::functions::to_string_to_string_alt_m::to_string_type_id_to_string_options as tos_ty;
use crate::functions::to_string_to_string_alt_n::to_string_type_pack_id_to_string_options as tos_tp;
use crate::functions::to_string_vector_to_string::to_string_vector_vector_type_id_to_string_options as to_string_vector_ty;
use crate::records::constraint::Constraint;
use crate::records::to_string_options::ToStringOptions;
use crate::type_aliases::constraint_v::ConstraintV;
use alloc::format;
use alloc::string::String;

/// C++ `std::string toString(const Constraint& constraint, ToStringOptions& opts)`.
pub fn to_string_constraint_to_string_options(
    constraint: &Constraint,
    opts: &mut ToStringOptions,
) -> String {
    match &constraint.c {
        ConstraintV::Subtype(c) => {
            let sub_str = tos_ty(c.sub_type, opts);
            let super_str = tos_ty(c.super_type, opts);
            format!("{} <: {}", sub_str, super_str)
        }
        ConstraintV::PackSubtype(c) => {
            let sub_str = tos_tp(c.sub_pack, opts);
            let super_str = tos_tp(c.super_pack, opts);
            format!("{} <...: {}", sub_str, super_str)
        }
        ConstraintV::Generalization(c) => {
            let sub_str = tos_ty(c.generalized_type, opts);
            let super_str = tos_ty(c.source_type, opts);
            format!("{} ~ gen {}", sub_str, super_str)
        }
        ConstraintV::Iterable(c) => {
            let iterator_str = tos_tp(c.iterator, opts);
            let variable_str = to_string_vector_ty(&c.variables, opts);

            format!("{} ~ iterate {}", variable_str, iterator_str)
        }
        ConstraintV::Name(c) => {
            let named_str = tos_ty(c.named_type, opts);
            format!("@name({}) = {}", named_str, c.name)
        }
        ConstraintV::TypeAliasExpansion(c) => {
            let target_str = tos_ty(c.target, opts);
            format!("expand {}", target_str)
        }
        ConstraintV::FunctionCall(c) => {
            format!(
                "call {}( {} ) with {{ result = {} }}",
                tos_ty(c.fn_type, opts),
                tos_tp(c.args_pack, opts),
                tos_tp(c.result, opts)
            )
        }
        ConstraintV::FunctionCheck(c) => {
            format!(
                "function_check {} {}",
                tos_ty(c.fn_type, opts),
                tos_tp(c.args_pack, opts)
            )
        }
        ConstraintV::PrimitiveType(c) => {
            if let Some(expected_type) = c.expected_type {
                format!(
                    "prim {}[expected: {}] as {}",
                    tos_ty(c.free_type, opts),
                    tos_ty(expected_type, opts),
                    tos_ty(c.primitive_type, opts)
                )
            } else {
                format!(
                    "prim {} as {}",
                    tos_ty(c.free_type, opts),
                    tos_ty(c.primitive_type, opts)
                )
            }
        }
        ConstraintV::HasProp(c) => {
            let mut s = format!(
                "{} ~ hasProp {}, \"{}\" ctx={}",
                tos_ty(c.result_type, opts),
                tos_ty(c.subject_type, opts),
                c.prop,
                c.context as i32
            );
            if c.in_conditional {
                s.push_str(" (inConditional)");
            }
            s
        }
        ConstraintV::HasIndexer(c) => {
            format!(
                "{} ~ hasIndexer {} {}",
                tos_ty(c.result_type, opts),
                tos_ty(c.subject_type, opts),
                tos_ty(c.index_type, opts)
            )
        }
        ConstraintV::AssignProp(c) => {
            format!(
                "{} ~ assignProp {} {} {}",
                tos_ty(c.prop_type, opts),
                tos_ty(c.lhs_type, opts),
                c.prop_name,
                tos_ty(c.rhs_type, opts)
            )
        }
        ConstraintV::AssignIndex(c) => {
            format!(
                "assignIndex {} {} {}",
                tos_ty(c.lhs_type, opts),
                tos_ty(c.index_type, opts),
                tos_ty(c.rhs_type, opts)
            )
        }
        ConstraintV::Unpack(c) => {
            format!(
                "{} ~ ...unpack {}",
                to_string_vector_ty(&c.result_pack, opts),
                tos_tp(c.source_pack, opts)
            )
        }
        ConstraintV::Reduce(c) => format!("reduce {}", tos_ty(c.ty, opts)),
        ConstraintV::ReducePack(c) => {
            format!("reduce {}", tos_tp(c.tp, opts))
        }
        ConstraintV::Equality(c) => {
            format!(
                "equality: {} ~ {}",
                tos_ty(c.result_type, opts),
                tos_ty(c.assignment_type, opts)
            )
        }
        ConstraintV::Simplify(c) => format!("simplify {}", tos_ty(c.ty, opts)),
        ConstraintV::PushFunctionType(c) => {
            format!(
                "push_function_type {} => {}",
                tos_ty(c.expected_function_type, opts),
                tos_ty(c.function_type, opts)
            )
        }
        ConstraintV::TypeInstantiation(c) => {
            format!(
                "explicitly_specified_constraints {} (typeArguments = {}), (typePackArguments = {})",
                tos_ty(c.function_type, opts),
                crate::functions::dump_to_string_alt_g::dump_vector_type_id(&c.type_arguments),
                crate::functions::dump_to_string_alt_h::dump_vector_type_pack_id(&c.type_pack_arguments)
            )
        }
        ConstraintV::PushType(c) => {
            format!(
                "push_type {} => {}",
                tos_ty(c.expectedType, opts),
                tos_ty(c.targetType, opts)
            )
        }
    }
}