Function get_lambda

lib/dsc-lib/src/functions/lambda_helpers.rs:33–50

Retrieves a lambda from the context and validates it has 1 or 2 parameters. # Arguments `context` - The context containing the lambda registry `lambda_id` - The lambda ID string (e.g., `__lambda_ `) `func_name` - The name of the calling function (for error messages) # Returns A reference to the borrowed lambdas HashMap. The caller must use the returned `Ref` to access the lambda to keep t

(
    context: &'a Context,
    lambda_id: &str,
    func_name: &str,
)

///
/// Returns an error if the lambda is not found or has invalid parameter count.
pub fn get_lambda<'a>(
    context: &'a Context,
    lambda_id: &str,
    func_name: &str,
) -> Result<Ref<'a, std::collections::HashMap<String, Lambda>>, DscError> {
    let lambdas = context.lambdas.borrow();
    
    if !lambdas.contains_key(lambda_id) {
        return Err(DscError::Parser(t!("functions.lambdaNotFound", name = func_name, id = lambda_id).to_string()));
    }
    
    let lambda = lambdas.get(lambda_id).unwrap();
    if lambda.parameters.is_empty() || lambda.parameters.len() > 2 {
        return Err(DscError::Parser(t!("functions.lambdaTooManyParams", name = func_name).to_string()));
    }
    
    Ok(lambdas)
}

/// Applies a lambda to each element of an array, yielding transformed values.
///