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path: root/oryxc/src/prelude.rs
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use std::collections::HashMap;
use std::fmt::{
	self,
	Debug,
	Formatter,
};

macro_rules! mkidtype {
	($name:ident) => {
		#[repr(transparent)]
		#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
		pub struct $name(pub u32);
		impl $name {
			#[allow(dead_code)]
			pub const INVALID: Self = Self(u32::MAX);
		}
		impl From<usize> for $name {
			fn from(n: usize) -> Self {
				return Self(n as u32);
			}
		}
		impl Into<usize> for $name {
			fn into(self) -> usize {
				return self.0 as usize;
			}
		}
	};
}
pub(crate) use mkidtype;

mkidtype!(FileId);
mkidtype!(ScopeId);
mkidtype!(SymbolId);
mkidtype!(TypeId);

impl ScopeId {
	pub const GLOBAL: Self = Self(0);
}

impl TypeId {
	const MVMSK: u32 = 1 << 31;

	pub fn to_mvindex(&self) -> Option<usize> {
		return if self.0 & Self::MVMSK != 0 {
			Some((self.0 & !Self::MVMSK) as usize)
		} else {
			None
		};
	}

	pub fn from_mvindex(i: usize) -> Self {
		return Self(i as u32 & Self::MVMSK);
	}
}

#[derive(Debug)]
pub struct Scope {
	pub parent: ScopeId,
	pub symtab: HashMap<SymbolId, Symbol>,
}

impl Scope {
	pub fn new(parent: ScopeId) -> Self {
		return Self {
			parent,
			symtab: HashMap::new(),
		};
	}
}

#[repr(u8)]
#[derive(Debug, Default)]
pub enum ResolutionState {
	#[default]
	Unresolved,
	Resolving,
	Resolved,
	Poisoned,
}

#[derive(Debug)]
pub struct Symbol {
	pub state: ResolutionState,
	pub kind:  SymbolType,
}

#[repr(u8)]
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub enum SymbolType {
	Constant,
	FuncParam,
}

pub enum OryxType {
	Boolean,
	Function {
		args: Box<[TypeId]>,
		rets: Box<[TypeId]>,
	},
	Integer {
		bits:   usize,
		signed: bool,
	},
	Pointer {
		base: u32,
	},
	Type(TypeId),
}

#[derive(Clone, Copy)]
pub struct SubNodes(pub u32, pub u32);

impl Debug for SubNodes {
	fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
		let __ = format_args!("_");
		return f
			.debug_tuple("SubNodes")
			.field(if self.0 != u32::MAX { &self.0 } else { &__ })
			.field(if self.1 != u32::MAX { &self.1 } else { &__ })
			.finish();
	}
}

impl Default for SubNodes {
	fn default() -> Self {
		return Self(u32::MAX, u32::MAX);
	}
}