Function parse_between_expression

crates/gitql-parser/src/parser.rs:3067–3154

(
    context: &mut ParserContext,
    env: &mut Environment,
    tokens: &[Token],
    position: &mut usize,
)

}

fn parse_between_expression(
    context: &mut ParserContext,
    env: &mut Environment,
    tokens: &[Token],
    position: &mut usize,
) -> Result<Box<dyn Expr>, Box<Diagnostic>> {
    let expression = parse_function_call_expression(context, env, tokens, position)?;

    // Check for `BETWEEN` or `NOT BETWEEN`
    // <expr> BETWEEN <expr> AND <expr>
    // <expr> NOT BETWEEN <expr> AND <expr>
    if is_current_token(tokens, position, TokenKind::Between)
        || (is_current_token(tokens, position, TokenKind::Not)
            && is_next_token(tokens, position, TokenKind::Between))
    {
        let has_not_keyword = is_current_token(tokens, position, TokenKind::Not);
        let operator_location = if has_not_keyword {
            // Consume `NOT` and `BETWEEN` keyword
            *position += 2;
            let mut not_location = tokens[*position - 2].location;
            let between_location = tokens[*position - 1].location;
            not_location.expand_until(between_location);
            not_location
        } else {
            // Consume `BETWEEN` keyword
            *position += 1;
            tokens[*position - 1].location
        };

        let kind = parse_between_expr_kind(tokens, position);
        let range_start = parse_function_call_expression(context, env, tokens, position)?;

        // Consume `AND` token
        consume_token_or_error(
            tokens,
            position,
            TokenKind::AndKeyword,
            "Expect `AND` after `BETWEEN` range start",
        )?;

        let range_end = parse_function_call_expression(context, env, tokens, position)?;

        let lhs_type = expression.expr_type();
        let range_start_type = &range_start.expr_type();
        let range_end_type = &range_end.expr_type();

        // Make sure LHS and Range start and end types all are equals
        if !lhs_type.equals(range_start_type) || !lhs_type.equals(range_end_type) {
            return Err(Diagnostic::error(&format!(
                "Expect `BETWEEN` Left hand side type, range start and end to has same type but got {lhs_type}, {} and {}",
                range_start_type.literal(),
                range_end_type.literal()
            ))
            .add_help("Try to make sure all of them has same type")
            .with_location(operator_location)
            .as_boxed());
        }