| /// Helper macro to get real values out of Value while retaining |
| /// proper errors in filters |
| /// |
| /// Takes 4 args: |
| /// |
| /// - the filter name, |
| /// - the variable name: use "value" if you are using it on the variable the filter is ran on |
| /// - the expected type |
| /// - the actual variable |
| /// |
| /// ```no_compile |
| /// let arr = try_get_value!("first", "value", Vec<Value>, value); |
| /// let val = try_get_value!("pluralize", "suffix", String, val.clone()); |
| /// ``` |
| #[macro_export] |
| macro_rules! try_get_value { |
| ($filter_name:expr, $var_name:expr, $ty:ty, $val:expr) => {{ |
| match $crate::from_value::<$ty>($val.clone()) { |
| Ok(s) => s, |
| Err(_) => { |
| if $var_name == "value" { |
| return Err($crate::Error::msg(format!( |
| "Filter `{}` was called on an incorrect value: got `{}` but expected a {}", |
| $filter_name, $val, stringify!($ty) |
| ))); |
| } else { |
| return Err($crate::Error::msg(format!( |
| "Filter `{}` received an incorrect type for arg `{}`: got `{}` but expected a {}", |
| $filter_name, $var_name, $val, stringify!($ty) |
| ))); |
| } |
| } |
| } |
| }}; |
| } |
