boa_ast 0.21.1

Abstract Syntax Tree definition for the Boa JavaScript engine.
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

//! Await expression Expression.

use core::ops::ControlFlow;

use super::Expression;
use crate::{
    Span, Spanned,
    visitor::{VisitWith, Visitor, VisitorMut},
};
use boa_interner::{Interner, ToIndentedString, ToInternedString};

/// An await expression is used within an async function to pause execution and wait for a
/// promise to resolve.
///
/// More information:
///  - [ECMAScript reference][spec]
///  - [MDN documentation][mdn]
///
/// [spec]: https://tc39.es/ecma262/#prod-AwaitExpression
/// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/await
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
#[derive(Clone, Debug, PartialEq)]
pub struct Await {
    target: Box<Expression>,
    span: Span,
}

impl Await {
    /// Create a new [`Await`] node.
    #[must_use]
    pub const fn new(target: Box<Expression>, span: Span) -> Self {
        Self { target, span }
    }

    /// Return the target expression that should be awaited.
    #[inline]
    #[must_use]
    pub const fn target(&self) -> &Expression {
        &self.target
    }
}

impl Spanned for Await {
    #[inline]
    fn span(&self) -> Span {
        self.span
    }
}

impl ToInternedString for Await {
    #[inline]
    fn to_interned_string(&self, interner: &Interner) -> String {
        format!("await {}", self.target.to_indented_string(interner, 0))
    }
}

impl From<Await> for Expression {
    #[inline]
    fn from(awaitexpr: Await) -> Self {
        Self::Await(awaitexpr)
    }
}

impl VisitWith for Await {
    fn visit_with<'a, V>(&'a self, visitor: &mut V) -> ControlFlow<V::BreakTy>
    where
        V: Visitor<'a>,
    {
        visitor.visit_expression(&self.target)
    }

    fn visit_with_mut<'a, V>(&'a mut self, visitor: &mut V) -> ControlFlow<V::BreakTy>
    where
        V: VisitorMut<'a>,
    {
        visitor.visit_expression_mut(&mut self.target)
    }
}