mirror of https://github.com/boa-dev/boa.git
Paul Lancaster
4 years ago
7 changed files with 140 additions and 2 deletions
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//! Await expression node.
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use super::Node; |
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use crate::{exec::Executable, BoaProfiler, Context, Result, Value}; |
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use gc::{Finalize, Trace}; |
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use std::fmt; |
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#[cfg(feature = "serde")] |
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use serde::{Deserialize, Serialize}; |
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///
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///
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/// More information:
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/// - [ECMAScript reference][spec]
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/// - [MDN documentation][mdn]
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///
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/// [spec]:
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/// [mdn]:
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#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))] |
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#[derive(Clone, Debug, Trace, Finalize, PartialEq)] |
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pub struct AwaitExpr { |
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expr: Box<Node>, |
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} |
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impl Executable for AwaitExpr { |
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fn run(&self, interpreter: &mut Context) -> Result<Value> { |
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let _timer = BoaProfiler::global().start_event("AwaitExpression", "exec"); |
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unimplemented!("Await expression execution"); |
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} |
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} |
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impl AwaitExpr { |
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/// Implements the display formatting with indentation.
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pub(super) fn display(&self, f: &mut fmt::Formatter<'_>, indentation: usize) -> fmt::Result { |
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writeln!(f, "await ")?; |
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self.expr.display(f, indentation) |
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} |
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} |
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impl<T> From<T> for AwaitExpr |
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where |
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T: Into<Box<Node>>, |
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{ |
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fn from(e: T) -> Self { |
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Self { expr: e.into() } |
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} |
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} |
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impl fmt::Display for AwaitExpr { |
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
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self.display(f, 0) |
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} |
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} |
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impl From<AwaitExpr> for Node { |
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fn from(awaitexpr: AwaitExpr) -> Self { |
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Self::AwaitExpr(awaitexpr) |
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} |
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} |
@ -0,0 +1,58 @@ |
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//! Await expression parsing.
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//!
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//! More information:
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//! - [MDN documentation][mdn]
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//! - [ECMAScript specification][spec]
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//!
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//! [mdn]:
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//! [spec]:
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use super::unary::UnaryExpression; |
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use crate::syntax::{ |
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ast::{node::AwaitExpr, Keyword}, |
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lexer::TokenKind, |
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parser::{AllowYield, Cursor, ParseError, TokenParser}, |
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}; |
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use std::io::Read; |
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/// Parses a await expression.
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///
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/// More information:
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/// - [MDN documentation][mdn]
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/// - [ECMAScript specification][spec]
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///
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/// [mdn]:
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/// [spec]:
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#[derive(Debug, Clone, Copy)] |
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pub(in crate::syntax::parser) struct AwaitExpression { |
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allow_yield: AllowYield, |
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} |
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impl AwaitExpression { |
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/// Creates a new `AwaitExpression` parser.
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pub(in crate::syntax::parser) fn new<Y>(allow_yield: Y) -> Self |
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where |
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Y: Into<AllowYield>, |
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{ |
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Self { |
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allow_yield: allow_yield.into(), |
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} |
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} |
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} |
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impl<R> TokenParser<R> for AwaitExpression |
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where |
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R: Read, |
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{ |
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type Output = AwaitExpr; |
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fn parse(self, cursor: &mut Cursor<R>) -> Result<Self::Output, ParseError> { |
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cursor.expect( |
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TokenKind::Keyword(Keyword::Await), |
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"Await expression parsing", |
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)?; |
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let expr = UnaryExpression::new(self.allow_yield, true).parse(cursor)?; |
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Ok(expr.into()) |
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} |
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} |
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