einstellung_derive 0.1.6

Proc-Macro crate for einstellung
Documentation 
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error[E0308]: mismatched types
 --> src/trybuild_tests/custom_merge_wrong_signature.rs
  |
  | #[derive(Config)]
  |          ^^^^^^ expected fn pointer, found fn item
  |
  = note: expected fn pointer `fn(std::option::Option<std::string::String>, std::option::Option<std::string::String>) -> Result<std::option::Option<std::string::String>, _>`
                found fn item `fn(std::string::String, std::string::String) -> Result<std::string::String, Box<(dyn StdError + 'static)>> {merge_hosts}`
  = note: this error originates in the derive macro `Config` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0308]: arguments to this function are incorrect
 --> src/trybuild_tests/custom_merge_wrong_signature.rs
  |
  | #[derive(Config)]
  |          ^^^^^^
  |          |
  |          expected `String`, found `Option<String>`
  |          expected `String`, found `Option<String>`
  |
  = note: expected struct `std::string::String`
               found enum `std::option::Option<std::string::String>`
  = note: expected struct `std::string::String`
               found enum `std::option::Option<std::string::String>`
note: function defined here
 --> src/trybuild_tests/custom_merge_wrong_signature.rs
  |
  | pub fn merge_hosts(_: String, b: String) -> Result<String, Box<dyn core::error::Error>> {
  |        ^^^^^^^^^^^ ---------  ---------
  = note: this error originates in the derive macro `Config` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider using `Option::expect` to unwrap the `std::option::Option<std::string::String>` value, panicking if the value is an `Option::None`
  |
7 | #[derive(Config.expect("REASON"))]
  |                +++++++++++++++++
help: consider using `Option::expect` to unwrap the `std::option::Option<std::string::String>` value, panicking if the value is an `Option::None`
  |
7 | #[derive(Config.expect("REASON"))]
  |                +++++++++++++++++

error[E0308]: mismatched types
 --> src/trybuild_tests/custom_merge_wrong_signature.rs
  |
  | #[derive(Config)]
  |          ^^^^^^ expected `Option<String>`, found `Result<String, ConfigError>`
  |
  = note: expected enum `std::option::Option<std::string::String>`
             found enum `Result<std::string::String, ConfigError>`
  = note: this error originates in the derive macro `Config` (in Nightly builds, run with -Z macro-backtrace for more info)