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88
boa/src/syntax/ast/node/declaration/async_arrow_function_decl/mod.rs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| use crate::{ | ||
| builtins::function::FunctionFlags, | ||
| exec::Executable, | ||
| gc::{Finalize, Trace}, | ||
| syntax::ast::node::{join_nodes, FormalParameter, Node, StatementList}, | ||
| Context, Result, Value, | ||
| }; | ||
| use std::fmt; | ||
|
|
||
| #[cfg(feature = "deser")] | ||
| use serde::{Deserialize, Serialize}; | ||
|
|
||
| /// | ||
| /// | ||
| /// | ||
| /// | ||
| /// More information: | ||
| /// - [ECMAScript reference][spec] | ||
| /// - [MDN documentation][mdn] | ||
| /// | ||
| /// [spec]: | ||
| /// [mdn]: | ||
| #[cfg_attr(feature = "deser", derive(Serialize, Deserialize))] | ||
| #[derive(Clone, Debug, Trace, Finalize, PartialEq)] | ||
| pub struct AsyncArrowFunctionDecl { | ||
| params: Box<[FormalParameter]>, | ||
| body: StatementList, | ||
| } | ||
|
|
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| impl AsyncArrowFunctionDecl { | ||
| /// Creates a new `AsyncArrowFunctionDecl` AST node. | ||
| pub(in crate::syntax) fn new<P, B>(params: P, body: B) -> Self | ||
| where | ||
| P: Into<Box<[FormalParameter]>>, | ||
| B: Into<StatementList>, | ||
| { | ||
| Self { | ||
| params: params.into(), | ||
| body: body.into(), | ||
| } | ||
| } | ||
|
|
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| /// Gets the list of parameters of the arrow function. | ||
| pub(crate) fn params(&self) -> &[FormalParameter] { | ||
| &self.params | ||
| } | ||
|
|
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| /// Gets the body of the arrow function. | ||
| pub(crate) fn body(&self) -> &[Node] { | ||
| &self.body.items() | ||
| } | ||
|
|
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| /// Implements the display formatting with indentation. | ||
| pub(in crate::syntax::ast::node) fn display( | ||
| &self, | ||
| f: &mut fmt::Formatter<'_>, | ||
| indentation: usize, | ||
| ) -> fmt::Result { | ||
| write!(f, "async (")?; | ||
| join_nodes(f, &self.params)?; | ||
| f.write_str(") => ")?; | ||
| self.body.display(f, indentation) | ||
| } | ||
| } | ||
|
|
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| impl Executable for AsyncArrowFunctionDecl { | ||
| fn run(&self, context: &mut Context) -> Result<Value> { | ||
| Ok(context.create_function( | ||
| self.params().to_vec(), | ||
| self.body().to_vec(), | ||
| FunctionFlags::CALLABLE | ||
| | FunctionFlags::CONSTRUCTABLE | ||
| | FunctionFlags::LEXICAL_THIS_MODE, | ||
| )?) | ||
| } | ||
| } | ||
|
|
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| impl fmt::Display for AsyncArrowFunctionDecl { | ||
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { | ||
| self.display(f, 0) | ||
| } | ||
| } | ||
|
|
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| impl From<AsyncArrowFunctionDecl> for Node { | ||
| fn from(decl: AsyncArrowFunctionDecl) -> Self { | ||
| Self::AsyncArrowFunctionDecl(decl) | ||
| } | ||
| } |
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104 changes: 104 additions & 0 deletions
104
boa/src/syntax/parser/expression/assignment/async_arrow_function/mod.rs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| //! Async Arrow function parsing. | ||
| //! | ||
| //! More information: | ||
| //! - [MDN documentation][mdn] | ||
| //! - [ECMAScript specification][spec] | ||
| //! | ||
| //! [mdn]: | ||
| //! [spec]: https://tc39.es/ecma262/#prod-AsyncArrowFunction | ||
| #[cfg(test)] | ||
| mod tests; | ||
|
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| use super::ConciseBody; | ||
| use crate::{ | ||
| syntax::{ | ||
| ast::{ | ||
| node::{AsyncArrowFunctionDecl, FormalParameter}, | ||
| Keyword, Punctuator, | ||
| }, | ||
| lexer::TokenKind, | ||
| parser::{ | ||
| error::{ErrorContext, ParseError}, | ||
| function::FormalParameters, | ||
| statement::BindingIdentifier, | ||
| AllowAwait, AllowIn, AllowYield, Cursor, TokenParser, | ||
| }, | ||
| }, | ||
| BoaProfiler, | ||
| }; | ||
|
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| use std::io::Read; | ||
|
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| /// Arrow function parsing. | ||
| /// | ||
| /// More information: | ||
| /// - [MDN documentation][mdn] | ||
| /// - [ECMAScript specification][spec] | ||
| /// | ||
| /// [mdn]: | ||
| /// [spec]: https://tc39.es/ecma262/#prod-AsyncArrowFunction | ||
| #[derive(Debug, Clone, Copy)] | ||
| pub(in crate::syntax::parser) struct AsyncArrowFunction { | ||
| allow_in: AllowIn, | ||
| allow_yield: AllowYield, | ||
| allow_await: AllowAwait, | ||
| } | ||
|
|
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| impl AsyncArrowFunction { | ||
| /// Creates a new `AsyncArrowFunction` parser. | ||
| pub(in crate::syntax::parser) fn new<I, Y, A>( | ||
| allow_in: I, | ||
| allow_yield: Y, | ||
| allow_await: A, | ||
| ) -> Self | ||
| where | ||
| I: Into<AllowIn>, | ||
| Y: Into<AllowYield>, | ||
| A: Into<AllowAwait>, | ||
| { | ||
| Self { | ||
| allow_in: allow_in.into(), | ||
| allow_yield: allow_yield.into(), | ||
| allow_await: allow_await.into(), | ||
| } | ||
| } | ||
| } | ||
|
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| impl<R> TokenParser<R> for AsyncArrowFunction | ||
| where | ||
| R: Read, | ||
| { | ||
| type Output = AsyncArrowFunctionDecl; | ||
|
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| fn parse(self, cursor: &mut Cursor<R>) -> Result<Self::Output, ParseError> { | ||
| let _timer = BoaProfiler::global().start_event("AsyncArrowFunction", "Parsing"); | ||
| cursor.expect( | ||
| TokenKind::Keyword(Keyword::Async), | ||
| "async arrow function parsing", | ||
| )?; | ||
| let token = cursor.peek_expect_no_lineterminator(0, "async arrow function parsing")?; | ||
|
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| let params = if let TokenKind::Punctuator(Punctuator::OpenParen) = &token.kind() { | ||
| // CoverCallExpressionAndAsyncArrowHead | ||
| cursor.expect(Punctuator::OpenParen, "async arrow function")?; | ||
|
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| let params = FormalParameters::new(false, true, true).parse(cursor)?; | ||
| cursor.expect(Punctuator::CloseParen, "async arrow function")?; | ||
| params | ||
| } else { | ||
| // AsyncArrowBindingIdentifier | ||
| let param = BindingIdentifier::new(self.allow_yield, true) | ||
| .parse(cursor) | ||
| .context("async arrow function")?; | ||
| Box::new([FormalParameter::new(param, None, false)]) | ||
| }; | ||
|
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| cursor.peek_expect_no_lineterminator(0, "async arrow function")?; | ||
| cursor.expect( | ||
| TokenKind::Punctuator(Punctuator::Arrow), | ||
| "async arrow function", | ||
| )?; | ||
| let body = ConciseBody::new(self.allow_in, true).parse(cursor)?; | ||
| Ok(AsyncArrowFunctionDecl::new(params, body)) | ||
| } | ||
| } |
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