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    use crate::builder::Str;

    /// [`Arg`][crate::Arg] or [`ArgGroup`][crate::ArgGroup] identifier
    ///
    /// This is used for accessing the value in [`ArgMatches`][crate::ArgMatches] or defining
    /// relationships between `Arg`s and `ArgGroup`s with functions like
    /// [`Arg::conflicts_with`][crate::Arg::conflicts_with].
    #[derive(Default, Clone, Eq, PartialEq, PartialOrd, Ord, Hash)]
    pub struct Id(Str);

    impl Id {
        pub(crate) const HELP: &'static str = "help";
        pub(crate) const VERSION: &'static str = "version";
        pub(crate) const EXTERNAL: &'static str = "";

        pub(crate) fn from_static_ref(name: &'static str) -> Self {
            Self(Str::from_static_ref(name))
        }

        /// Get the raw string of the `Id`
        pub fn as_str(&self) -> &str {
            self.0.as_str()
        }

        pub(crate) fn as_internal_str(&self) -> &Str {
            &self.0
        }
    }

    impl From<&'_ Id> for Id {
        fn from(id: &'_ Id) -> Self {
            id.clone()
        }
    }

    impl From<Str> for Id {
        fn from(name: Str) -> Self {
            Self(name)
        }
    }

    impl From<&'_ Str> for Id {
        fn from(name: &'_ Str) -> Self {
            Self(name.into())
        }
    }

    #[cfg(feature = "string")]
    impl From<std::string::String> for Id {
        fn from(name: std::string::String) -> Self {
            Self(name.into())
        }
    }

    #[cfg(feature = "string")]
    impl From<&'_ std::string::String> for Id {
        fn from(name: &'_ std::string::String) -> Self {
            Self(name.into())
        }
    }

    impl From<&'static str> for Id {
        fn from(name: &'static str) -> Self {
            Self(name.into())
        }
    }

    impl From<&'_ &'static str> for Id {
        fn from(name: &'_ &'static str) -> Self {
            Self(name.into())
        }
    }

    impl From<Id> for Str {
        fn from(name: Id) -> Self {
            name.0
        }
    }

    impl From<Id> for String {
        fn from(name: Id) -> Self {
            Str::from(name).into()
        }
    }

    impl std::fmt::Display for Id {
        #[inline]
        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
            std::fmt::Display::fmt(self.as_str(), f)
        }
    }

    impl std::fmt::Debug for Id {
        #[inline]
        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
            std::fmt::Debug::fmt(self.as_str(), f)
        }
    }

    impl AsRef<str> for Id {
        #[inline]
        fn as_ref(&self) -> &str {
            self.as_str()
        }
    }

    impl std::borrow::Borrow<str> for Id {
        #[inline]
        fn borrow(&self) -> &str {
            self.as_str()
        }
    }

    impl PartialEq<str> for Id {
        #[inline]
        fn eq(&self, other: &str) -> bool {
            PartialEq::eq(self.as_str(), other)
        }
    }
    impl PartialEq<Id> for str {
        #[inline]
        fn eq(&self, other: &Id) -> bool {
            PartialEq::eq(self, other.as_str())
        }
    }

    impl PartialEq<&'_ str> for Id {
        #[inline]
        fn eq(&self, other: &&str) -> bool {
            PartialEq::eq(self.as_str(), *other)
        }
    }
    impl PartialEq<Id> for &'_ str {
        #[inline]
        fn eq(&self, other: &Id) -> bool {
            PartialEq::eq(*self, other.as_str())
        }
    }

    impl PartialEq<Str> for Id {
        #[inline]
        fn eq(&self, other: &Str) -> bool {
            PartialEq::eq(self.as_str(), other.as_str())
        }
    }
    impl PartialEq<Id> for Str {
        #[inline]
        fn eq(&self, other: &Id) -> bool {
            PartialEq::eq(self.as_str(), other.as_str())
        }
    }

    impl PartialEq<std::string::String> for Id {
        #[inline]
        fn eq(&self, other: &std::string::String) -> bool {
            PartialEq::eq(self.as_str(), other.as_str())
        }
    }
    impl PartialEq<Id> for std::string::String {
        #[inline]
        fn eq(&self, other: &Id) -> bool {
            PartialEq::eq(other, self)
        }
    }