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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| use super::Node; | ||
| use gc::{Finalize, Trace}; | ||
| use std::fmt; | ||
|
|
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| #[cfg(feature = "serde")] | ||
| use serde::{Deserialize, Serialize}; | ||
|
|
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| #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))] | ||
| #[derive(Clone, Debug, Trace, Finalize, PartialEq)] | ||
| pub struct Label { | ||
| stmt: Box<Node>, | ||
| label: Box<str>, | ||
| } | ||
|
|
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| impl Label { | ||
| pub(super) fn display(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { | ||
| write!(f, "{}", format!("{}: {}", self.label, self.stmt)) | ||
| } | ||
|
|
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| pub fn new(stmt: Node, label: Box<str>) -> Self { | ||
| Self { | ||
| stmt: stmt.into(), | ||
| label, | ||
| } | ||
| } | ||
| } | ||
|
|
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| impl From<Label> for Node { | ||
| fn from(label_stmt: Label) -> Node { | ||
| Node::Label(label_stmt) | ||
| } | ||
| } | ||
|
|
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| impl fmt::Display for Label { | ||
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { | ||
| self.display(f) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| use super::{LabelIdentifier, Statement}; | ||
| use crate::{ | ||
| syntax::{ | ||
| ast::{node::Label, Punctuator}, | ||
| parser::{ | ||
| cursor::Cursor, error::ParseError, AllowAwait, AllowReturn, AllowYield, TokenParser, | ||
| }, | ||
| }, | ||
| BoaProfiler, | ||
| }; | ||
| /// Labelled Statement Parsing | ||
| /// | ||
| /// More information | ||
| /// - [MDN documentation][mdn] | ||
| /// - [ECMAScript specification][spec] | ||
| /// | ||
| /// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/label | ||
| /// [spec]: https://tc39.es/ecma262/#sec-labelled-statements | ||
| #[derive(Debug, Clone, Copy)] | ||
| pub(super) struct LabelledStatement { | ||
| allow_yield: AllowYield, | ||
| allow_await: AllowAwait, | ||
| allow_return: AllowReturn, | ||
| } | ||
|
|
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| impl LabelledStatement { | ||
| pub(super) fn new<Y, A, R>(allow_yield: Y, allow_await: A, allow_return: R) -> Self | ||
| where | ||
| Y: Into<AllowYield>, | ||
| A: Into<AllowAwait>, | ||
| R: Into<AllowReturn>, | ||
| { | ||
| Self { | ||
| allow_yield: allow_yield.into(), | ||
| allow_await: allow_await.into(), | ||
| allow_return: allow_return.into(), | ||
| } | ||
| } | ||
| } | ||
|
|
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| impl TokenParser for LabelledStatement { | ||
| type Output = Label; | ||
|
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| fn parse(self, cursor: &mut Cursor<'_>) -> Result<Self::Output, ParseError> { | ||
| let _timer = BoaProfiler::global().start_event("Label", "Parsing"); | ||
| let name = LabelIdentifier::new(self.allow_yield, self.allow_await).parse(cursor)?; | ||
| cursor.expect(Punctuator::Colon, "Labelled Statement")?; | ||
| let stmt = | ||
| Statement::new(self.allow_yield, self.allow_await, self.allow_return).parse(cursor)?; | ||
| Ok(Label::new(stmt, name)) | ||
| } | ||
| } |
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