Function parse_cast_call_expression

crates/gitql-parser/src/parse_cast.rs:34–70

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

}

pub(crate) fn parse_cast_call_expression(
    context: &mut ParserContext,
    env: &mut Environment,
    tokens: &[Token],
    position: &mut usize,
) -> Result<Box<dyn Expr>, Box<Diagnostic>> {
    let cast_token_location =
        consume_token_or_error(tokens, position, TokenKind::Cast, "Expect 'CAST' Keyword")?
            .location;

    consume_token_or_error(
        tokens,
        position,
        TokenKind::LeftParen,
        "Expect '(' after 'CAST' Keyword",
    )?;

    let expr = parse_expression(context, env, tokens, position)?;

    consume_token_or_error(
        tokens,
        position,
        TokenKind::As,
        "Expect 'AS' keyword after 'CAST' expression value",
    )?;

    let target_type = parse_type(env, tokens, position)?;

    consume_token_or_error(
        tokens,
        position,
        TokenKind::RightParen,
        "Expect ')' at the end of 'CAST' expression",
    )?;

    cast_expression_or_error(expr, target_type, cast_token_location)
}

fn cast_expression_or_error(
    expr: Box<dyn Expr>,