einstellung_derive 0.1.2

Proc-Macro crate for einstellung
Documentation 
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error[E0308]: mismatched types
 --> src/trybuild_tests/validate_missing_reference.rs
  |
  | #[derive(Config)]
  |          ------ expected due to this
  | struct ServerConfig {
  |     #[config(validate = validate_port)]
  |                         ^^^^^^^^^^^^^ expected fn pointer, found fn item
  |
  = note: expected fn pointer `for<'a> fn(&'a u16) -> Result<(), _>`
                found fn item `fn(u16) -> Result<(), Box<(dyn StdError + 'static)>> {validate_port}`

error[E0308]: mismatched types
 --> src/trybuild_tests/validate_missing_reference.rs
  |
  |     #[config(validate = validate_port)]
  |                         ------------- arguments to this function are incorrect
  |     port: u16,
  |     ^^^^^^^^^ expected `u16`, found `&u16`
  |
note: function defined here
 --> src/trybuild_tests/validate_missing_reference.rs
  |
  | pub fn validate_port(_: u16) -> Result<(), Box<dyn std::error::Error>> {
  |        ^^^^^^^^^^^^^ ------