#![cfg_attr(docsrs, feature(doc_auto_cfg, doc_cfg))]

#![doc = include_str!("../README.md")]

// @@ begin lint list maintained by maint/add_warning @@

#![allow(renamed_and_removed_lints)] // @@REMOVE_WHEN(ci_arti_stable)

#![allow(unknown_lints)] // @@REMOVE_WHEN(ci_arti_nightly)

#![warn(missing_docs)]

#![warn(noop_method_call)]

#![warn(unreachable_pub)]

#![warn(clippy::all)]

#![deny(clippy::await_holding_lock)]

#![deny(clippy::cargo_common_metadata)]

#![deny(clippy::cast_lossless)]

#![deny(clippy::checked_conversions)]

#![warn(clippy::cognitive_complexity)]

#![deny(clippy::debug_assert_with_mut_call)]

#![deny(clippy::exhaustive_enums)]

#![deny(clippy::exhaustive_structs)]

#![deny(clippy::expl_impl_clone_on_copy)]

#![deny(clippy::fallible_impl_from)]

#![deny(clippy::implicit_clone)]

#![deny(clippy::large_stack_arrays)]

#![warn(clippy::manual_ok_or)]

#![deny(clippy::missing_docs_in_private_items)]

#![warn(clippy::needless_borrow)]

#![warn(clippy::needless_pass_by_value)]

#![warn(clippy::option_option)]

#![deny(clippy::print_stderr)]

#![deny(clippy::print_stdout)]

#![warn(clippy::rc_buffer)]

#![deny(clippy::ref_option_ref)]

#![warn(clippy::semicolon_if_nothing_returned)]

#![warn(clippy::trait_duplication_in_bounds)]

#![deny(clippy::unchecked_duration_subtraction)]

#![deny(clippy::unnecessary_wraps)]

#![warn(clippy::unseparated_literal_suffix)]

#![deny(clippy::unwrap_used)]

#![deny(clippy::mod_module_files)]

#![allow(clippy::let_unit_value)] // This can reasonably be done for explicitness

#![allow(clippy::uninlined_format_args)]

#![allow(clippy::significant_drop_in_scrutinee)] // arti/-/merge_requests/588/#note_2812945

#![allow(clippy::result_large_err)] // temporary workaround for arti#587

#![allow(clippy::needless_raw_string_hashes)] // complained-about code is fine, often best

#![allow(clippy::needless_lifetimes)] // See arti#1765

#![allow(mismatched_lifetime_syntaxes)] // temporary workaround for arti#2060

//! <!-- @@ end lint list maintained by maint/add_warning @@ -->

/// Declare an integer type with some named elements.

///

/// This macro declares a struct that wraps an integer

/// type, and allows any integer type as a value.  Some values of this type

/// have names, and others do not, but they are all allowed.

///

/// This macro is suitable for protocol implementations that accept

/// any integer on the wire, and have definitions for some of those

/// integers.  For example, Tor cell commands are 8-bit integers, but

/// not every u8 is a currently recognized Tor command.

///

/// # Examples

/// ```

/// use caret::caret_int;

/// caret_int! {

///     pub struct FruitID(u8) {

///         AVOCADO = 7,

///         PERSIMMON = 8,

///         LONGAN = 99

///     }

/// }

///

/// // Known fruits work the way we would expect...

/// let a_num: u8 = FruitID::AVOCADO.into();

/// assert_eq!(a_num, 7);

/// let a_fruit: FruitID = 8.into();

/// assert_eq!(a_fruit, FruitID::PERSIMMON);

/// assert_eq!(format!("I'd like a {}", FruitID::PERSIMMON),

///            "I'd like a PERSIMMON");

///

/// // And we can construct unknown fruits, if we encounter any.

/// let weird_fruit: FruitID = 202.into();

/// assert_eq!(format!("I'd like a {}", weird_fruit),

///            "I'd like a 202");

/// ```

#[macro_export]

macro_rules! caret_int {

    {

       $(#[$meta:meta])*

       $v:vis struct $name:ident ( $numtype:ty ) {

           $(

               $(#[$item_meta:meta])*

               $id:ident = $num:literal

           ),*

           $(,)?

      }

    } => {

        #[derive(PartialEq,Eq,Copy,Clone)]

        $(#[$meta])*

        $v struct $name($numtype);

        impl From<$name> for $numtype {

        }

        impl From<$numtype> for $name {

        }

        impl $name {

            $(

                $( #[$item_meta] )*

                pub const $id: $name = $name($num) ; )*

            /// Return true if this value is one that we recognize.

            /// Try to convert this value from one of the recognized names.

            /// Return the underlying integer that this value represents.

        }

        impl std::fmt::Display for $name {

                }

        }

        // `#[educe(Debug)]` could do this for us, but let's not deepen this macrology

        impl std::fmt::Debug for $name {

        }

    };

}