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/*
This file is part of jellything (https://codeberg.org/metamuffin/jellything)
which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
Copyright (C) 2026 metamuffin <metamuffin.org>
*/
use core::marker::{PhantomData, Sized};
use std::fmt::Display;
#[repr(transparent)]
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct Tag(pub u32);
impl Default for Tag {
fn default() -> Self {
Self::new(b"1111")
}
}
impl Tag {
pub const fn new(fourcc: &[u8; 4]) -> Self {
Self(u32::from_le_bytes(*fourcc))
}
}
impl Display for Tag {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.write_str(str::from_utf8(&self.0.to_le_bytes()).unwrap())
}
}
#[derive(PartialEq, Eq, PartialOrd, Ord)]
pub struct TypedTag<T: ?Sized>(pub Tag, pub PhantomData<T>);
impl<T: ?Sized> Display for TypedTag<T> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
self.0.fmt(f)
}
}
#[allow(clippy::non_canonical_clone_impl)]
impl<T: ?Sized> Clone for TypedTag<T> {
fn clone(&self) -> Self {
Self(self.0, PhantomData)
}
}
impl<T: ?Sized> Copy for TypedTag<T> {}
impl<T: ?Sized> TypedTag<T> {
pub const fn new(tag: Tag) -> Self {
Self(tag, PhantomData)
}
}
pub mod types {
use crate::Object;
use std::any::TypeId;
pub const OBJECT: TypeId = TypeId::of::<Object>();
pub const STR: TypeId = TypeId::of::<&str>();
pub const BINARY: TypeId = TypeId::of::<&[u8]>();
pub const U32: TypeId = TypeId::of::<u32>();
pub const U64: TypeId = TypeId::of::<u64>();
pub const I64: TypeId = TypeId::of::<i64>();
pub const F64: TypeId = TypeId::of::<f64>();
}
#[macro_export]
macro_rules! fields {
($($id:ident: $type:ty = $tag:literal;)*) => {
$(pub const $id: $crate::TypedTag<$type> = $crate::TypedTag::new($crate::Tag::new($tag));)*
};
}
#[macro_export]
macro_rules! enums {
($($id:ident = $tag:literal;)*) => {
$(pub const $id: $crate::Tag = $crate::Tag::new($tag);)*
};
}
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