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mod array_initializer;
mod async_function_expression;
mod function_expression;
mod object_initializer;
mod template;
#[cfg(test)]
mod tests;
use self::{
array_initializer::ArrayLiteral, async_function_expression::AsyncFunctionExpression,
function_expression::FunctionExpression, object_initializer::ObjectLiteral,
};
use super::Expression;
use crate::{
profiler::BoaProfiler,
syntax::{
ast::{
node::{Call, Identifier, New, Node},
Const, Keyword, Punctuator,
},
lexer::{token::Numeric, InputElement, TokenKind},
parser::{
expression::primary::template::TemplateLiteral, AllowAwait, AllowYield, Cursor,
ParseError, ParseResult, TokenParser,
},
},
};
pub(in crate::syntax::parser) use object_initializer::Initializer;
use std::io::Read;
#[derive(Debug, Clone, Copy)]
pub(super) struct PrimaryExpression {
allow_yield: AllowYield,
allow_await: AllowAwait,
}
impl PrimaryExpression {
pub(super) fn new<Y, A>(allow_yield: Y, allow_await: A) -> Self
where
Y: Into<AllowYield>,
A: Into<AllowAwait>,
{
Self {
allow_yield: allow_yield.into(),
allow_await: allow_await.into(),
}
}
}
impl<R> TokenParser<R> for PrimaryExpression
where
R: Read,
{
type Output = Node;
fn parse(self, cursor: &mut Cursor<R>) -> ParseResult {
let _timer = BoaProfiler::global().start_event("PrimaryExpression", "Parsing");
let tok = cursor.next()?.ok_or(ParseError::AbruptEnd)?;
match tok.kind() {
TokenKind::Keyword(Keyword::This) => Ok(Node::This),
TokenKind::Keyword(Keyword::Function) => {
FunctionExpression.parse(cursor).map(Node::from)
}
TokenKind::Keyword(Keyword::Async) => AsyncFunctionExpression::new(self.allow_yield)
.parse(cursor)
.map(Node::from),
TokenKind::Punctuator(Punctuator::OpenParen) => {
cursor.set_goal(InputElement::RegExp);
let expr =
Expression::new(true, self.allow_yield, self.allow_await).parse(cursor)?;
cursor.expect(Punctuator::CloseParen, "primary expression")?;
Ok(expr)
}
TokenKind::Punctuator(Punctuator::OpenBracket) => {
cursor.set_goal(InputElement::RegExp);
ArrayLiteral::new(self.allow_yield, self.allow_await)
.parse(cursor)
.map(Node::ArrayDecl)
}
TokenKind::Punctuator(Punctuator::OpenBlock) => {
cursor.set_goal(InputElement::RegExp);
Ok(ObjectLiteral::new(self.allow_yield, self.allow_await)
.parse(cursor)?
.into())
}
TokenKind::BooleanLiteral(boolean) => Ok(Const::from(*boolean).into()),
TokenKind::NullLiteral => Ok(Const::Null.into()),
TokenKind::Identifier(ident) => Ok(Identifier::from(ident.as_ref()).into()),
TokenKind::StringLiteral(s) | TokenKind::TemplateNoSubstitution { cooked: s, .. } => {
Ok(Const::from(s.as_ref()).into())
}
TokenKind::NumericLiteral(Numeric::Integer(num)) => Ok(Const::from(*num).into()),
TokenKind::NumericLiteral(Numeric::Rational(num)) => Ok(Const::from(*num).into()),
TokenKind::NumericLiteral(Numeric::BigInt(num)) => Ok(Const::from(num.clone()).into()),
TokenKind::RegularExpressionLiteral(body, flags) => {
Ok(Node::from(New::from(Call::new(
Identifier::from("RegExp"),
vec![
Const::from(body.as_ref()).into(),
Const::from(flags.to_string()).into(),
],
))))
}
TokenKind::Punctuator(Punctuator::Div) => {
let tok = cursor.lex_regex(tok.span().start())?;
if let TokenKind::RegularExpressionLiteral(body, flags) = tok.kind() {
Ok(Node::from(New::from(Call::new(
Identifier::from("RegExp"),
vec![
Const::from(body.as_ref()).into(),
Const::from(flags.to_string()).into(),
],
))))
} else {
Err(ParseError::unexpected(tok, "regular expression literal"))
}
}
TokenKind::TemplateMiddle { cooked, .. } => TemplateLiteral::new(
self.allow_yield,
self.allow_await,
tok.span().start(),
cooked.as_ref(),
)
.parse(cursor)
.map(Node::TemplateLit),
_ => Err(ParseError::unexpected(tok.clone(), "primary expression")),
}
}
}