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use crate::{
exec::{Executable, InterpreterState},
gc::{Finalize, Trace},
syntax::ast::node::Node,
Context, JsResult, JsValue,
};
use std::fmt;
#[cfg(feature = "deser")]
use serde::{Deserialize, Serialize};
#[cfg_attr(feature = "deser", derive(Serialize, Deserialize))]
#[derive(Clone, Debug, Trace, Finalize, PartialEq)]
pub struct DoWhileLoop {
body: Box<Node>,
cond: Box<Node>,
label: Option<Box<str>>,
}
impl DoWhileLoop {
pub fn body(&self) -> &Node {
&self.body
}
pub fn cond(&self) -> &Node {
&self.cond
}
pub fn label(&self) -> Option<&str> {
self.label.as_ref().map(Box::as_ref)
}
pub fn set_label(&mut self, label: Box<str>) {
self.label = Some(label);
}
pub fn new<B, C>(body: B, condition: C) -> Self
where
B: Into<Node>,
C: Into<Node>,
{
Self {
body: Box::new(body.into()),
cond: Box::new(condition.into()),
label: None,
}
}
pub(in crate::syntax::ast::node) fn display(
&self,
f: &mut fmt::Formatter<'_>,
indentation: usize,
) -> fmt::Result {
if let Some(ref label) = self.label {
write!(f, "{}: ", label)?;
}
write!(f, "do ")?;
self.body().display(f, indentation)?;
write!(f, " while ({})", self.cond())
}
}
impl Executable for DoWhileLoop {
fn run(&self, context: &mut Context) -> JsResult<JsValue> {
let mut result;
loop {
result = self.body().run(context)?;
match context.executor().get_current_state() {
InterpreterState::Break(label) => {
handle_state_with_labels!(self, label, context, break);
break;
}
InterpreterState::Continue(label) => {
handle_state_with_labels!(self, label, context, continue);
}
InterpreterState::Return => {
return Ok(result);
}
InterpreterState::Executing => {
}
}
if !self.cond().run(context)?.to_boolean() {
break;
}
}
Ok(result)
}
}
impl fmt::Display for DoWhileLoop {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.display(f, 0)
}
}
impl From<DoWhileLoop> for Node {
fn from(do_while: DoWhileLoop) -> Self {
Self::DoWhileLoop(do_while)
}
}