Method parse_single_expression

crates/ruff_python_parser/src/parser/mod.rs:212–243

Parses a single expression. This is to be used for [`Mode::Expression`]. ## Recovery After parsing a single expression, an error is reported and all remaining tokens are dropped by the parser.

(&mut self)

    /// After parsing a single expression, an error is reported and all remaining tokens are
    /// dropped by the parser.
    fn parse_single_expression(&mut self) -> ModExpression {
        let start = self.node_start();
        let parsed_expr = self.parse_expression_list(ExpressionContext::default());

        // All remaining newlines are actually going to be non-logical newlines.
        self.eat(TokenKind::Newline);

        if !self.at(TokenKind::EndOfFile) {
            self.add_error(
                ParseErrorType::UnexpectedExpressionToken,
                self.current_token_range(),
            );

            // TODO(dhruvmanila): How should error recovery work here? Just truncate after the expression?
            let mut progress = ParserProgress::default();
            loop {
                progress.assert_progressing(self);
                if self.at(TokenKind::EndOfFile) {
                    break;
                }
                self.bump_any();
            }
        }

        self.bump(TokenKind::EndOfFile);

        ModExpression {
            body: Box::new(parsed_expr.expr),
            range: self.node_range(start),
            node_index: AtomicNodeIndex::NONE,
        }
    }

    /// Parses a Python module.
    ///