wasmer_interface_types/
ast.rs

1//! Represents the WIT language as a tree. This is the central
2//! representation of the language.
3
4use crate::{
5    interpreter::Instruction,
6    types::{InterfaceType, RecordType},
7};
8use std::str;
9
10/// Represents the kind of type.
11#[derive(PartialEq, Debug)]
12pub enum TypeKind {
13    /// A function type.
14    Function,
15
16    /// A record type.
17    Record,
18}
19
20/// Represents a type.
21#[derive(PartialEq, Debug)]
22pub enum Type {
23    /// A function type, like:
24    ///
25    /// ```wasm,ignore
26    /// (@interface type (func (param i32 i32) (result string)))
27    /// ```
28    Function {
29        /// Types for the parameters (`(param …)`).
30        inputs: Vec<InterfaceType>,
31
32        /// Types for the results (`(result …)`).
33        outputs: Vec<InterfaceType>,
34    },
35
36    /// A record type, like:
37    ///
38    /// ```wasm,ignore
39    /// (@interface type (record string i32))
40    /// ```
41    Record(RecordType),
42}
43
44/// Represents an imported function.
45#[derive(PartialEq, Debug)]
46pub struct Import<'input> {
47    /// The function namespace.
48    pub namespace: &'input str,
49
50    /// The function name.
51    pub name: &'input str,
52
53    /// The type signature.
54    pub signature_type: u32,
55}
56
57/// Represents an exported function signature.
58#[derive(PartialEq, Debug)]
59pub struct Export<'input> {
60    /// The export name.
61    pub name: &'input str,
62
63    /// The WIT function type being exported.
64    pub function_type: u32,
65}
66
67/// Represents an adapter.
68#[derive(PartialEq, Debug)]
69pub struct Adapter {
70    /// The adapter function type.
71    pub function_type: u32,
72
73    /// The instructions.
74    pub instructions: Vec<Instruction>,
75}
76
77/// Represents an implementation.
78#[derive(PartialEq, Debug)]
79pub struct Implementation {
80    /// The core function type.
81    pub core_function_type: u32,
82
83    /// The adapter function type.
84    pub adapter_function_type: u32,
85}
86
87/// Represents the kind of interface.
88#[derive(PartialEq, Debug)]
89pub(crate) enum InterfaceKind {
90    /// A type.
91    Type,
92
93    /// An imported function.
94    Import,
95
96    /// An adapter.
97    Adapter,
98
99    /// An exported function.
100    Export,
101
102    /// An implementation.
103    Implementation,
104}
105
106/// Represents a set of interfaces, i.e. it entirely describes a WIT
107/// definition.
108#[derive(PartialEq, Default, Debug)]
109pub struct Interfaces<'input> {
110    /// All the types.
111    pub types: Vec<Type>,
112
113    /// All the imported functions.
114    pub imports: Vec<Import<'input>>,
115
116    /// All the adapters.
117    pub adapters: Vec<Adapter>,
118
119    /// All the exported functions.
120    pub exports: Vec<Export<'input>>,
121
122    /// All the implementations.
123    pub implementations: Vec<Implementation>,
124}
wasmer_interface_types/ast.rs

wasmer_interface_types/
ast.rs
