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pub macro builder_functions( $( $attr:ident($t:ty) $(,)? )* ) {
    $(
        pub fn $attr(mut self, value: impl Into<$t>) -> Self {
            self.$attr = Some(value.into());
            self
        }
    )*
}

pub macro builder_enum_functions( $( $attr:ident { $( $fn:ident() => $value:expr $(,)? )* } $(,)? )* ) {
    $(
        $(
            pub fn $fn(mut self) -> Self {
                self.$attr = Some($value.into());
                self
            }
        )*
    )*
}

pub macro value_functions( $( $attr:ident { $( $fn:ident() => $value:expr $(,)? )* } $(,)? )* ) {
    $(
        $(
            pub fn $fn(mut self) -> Self {
                self.$attr = $value.into();
                self
            }
        )*
    )*
}

pub macro composition_functions( $( $attr:ident: $ty:ty $(,)? )* ) {
    $(
        pub fn $attr(mut self, get_new_value: impl FnOnce($ty) -> $ty) -> Self {
            self.$attr = get_new_value(self.$attr);
            self
        }
    )*
}

pub macro option_composition_functions( $( $attr:ident: $ty:ident $(,)? )* ) {
    $(
        pub fn $attr(mut self, get_new_value: impl FnOnce($ty) -> $ty) -> Self {
            self.$attr = Some(get_new_value(self.$attr.unwrap_or_default()));
            self
        }
    )*
}

pub macro bool_functions ( $( $fn:ident() => $attr:ident $(,)? )* ) {
    $(
        pub fn $fn(&self) -> bool {
            self.$attr
        }
    )*
}

pub macro view_data_functions ( $( $fn:ident() => $attr:ident $(,)? )* ) {
    $(
        pub fn as_$fn(&self) -> &$ty {
            &self.$attr
        }
    )*
}