Method invoke

lib/dsc-lib/src/functions/range.rs:31–65

(&self, args: &[Value], _context: &Context)

    }

    fn invoke(&self, args: &[Value], _context: &Context) -> Result<Value, DscError> {
        debug!("{}", t!("functions.range.invoked"));

        let start_index = args[0].as_i64()
            .ok_or_else(|| DscError::FunctionArg("range".to_string(), t!("functions.range.startIndexNotInt").to_string()))?;
        
        let count = args[1].as_i64()
            .ok_or_else(|| DscError::FunctionArg("range".to_string(), t!("functions.range.countNotInt").to_string()))?;

        // validation checks
        if count < 0 {
            return Err(DscError::FunctionArg("range".to_string(), t!("functions.range.countNegative").to_string()));
        }

        if count > 10000 {
            return Err(DscError::FunctionArg("range".to_string(), t!("functions.range.countTooLarge").to_string()));
        }

        // should not exceed
        if let Some(sum) = start_index.checked_add(count) {
            if sum > 2_147_483_647 {
                return Err(DscError::FunctionArg("range".to_string(), t!("functions.range.sumTooLarge").to_string()));
            }
        } else {
            return Err(DscError::FunctionArg("range".to_string(), t!("functions.range.sumOverflow").to_string()));
        }

        let mut result = Vec::<Value>::new();
        for i in 0..count {
            let value = start_index + i;
            result.push(Value::Number(value.into()));
        }

        Ok(Value::Array(result))
    }
}

#[cfg(test)]