inf_wast/core/
global.rs

1use crate::core::*;
2use crate::kw;
3use crate::parser::{Parse, Parser, Result};
4use crate::token::{Id, NameAnnotation, Span};
5
6/// A WebAssembly global in a module
7#[derive(Debug)]
8pub struct Global<'a> {
9    /// Where this `global` was defined.
10    pub span: Span,
11    /// An optional name to reference this global by
12    pub id: Option<Id<'a>>,
13    /// An optional name for this function stored in the custom `name` section.
14    pub name: Option<NameAnnotation<'a>>,
15    /// If present, inline export annotations which indicate names this
16    /// definition should be exported under.
17    pub exports: InlineExport<'a>,
18    /// The type of this global, both its value type and whether it's mutable.
19    pub ty: GlobalType<'a>,
20    /// What kind of global this defined as.
21    pub kind: GlobalKind<'a>,
22}
23
24/// Different kinds of globals that can be defined in a module.
25#[derive(Debug)]
26pub enum GlobalKind<'a> {
27    /// A global which is actually defined as an import, such as:
28    ///
29    /// ```text
30    /// (global i32 (import "foo" "bar"))
31    /// ```
32    Import(InlineImport<'a>),
33
34    /// A global defined inline in the module itself
35    Inline(Expression<'a>),
36}
37
38impl<'a> Parse<'a> for Global<'a> {
39    fn parse(parser: Parser<'a>) -> Result<Self> {
40        let span = parser.parse::<kw::global>()?.0;
41        let id = parser.parse()?;
42        let name = parser.parse()?;
43        let exports = parser.parse()?;
44
45        let (ty, kind) = if let Some(import) = parser.parse()? {
46            (parser.parse()?, GlobalKind::Import(import))
47        } else {
48            (parser.parse()?, GlobalKind::Inline(parser.parse()?))
49        };
50        Ok(Global {
51            span,
52            id,
53            name,
54            exports,
55            ty,
56            kind,
57        })
58    }
59}
inf_wast/core/global.rs

inf_wast/core/
global.rs
