use symbol::Symbol;
use symbol::repr::{SymbolRepr, FIRST_ID};
#[allow(missing_copy_implementations)]
#[derive(Clone, Debug, Default)]
pub struct SymbolSource {
next_id: SymbolRepr,
}
impl SymbolSource {
pub fn new() -> Self {
Self::default()
}
pub fn sym<T>(&mut self) -> T
where T: SymbolContainer
{
T::generate(self)
}
pub fn next_sym(&mut self) -> Symbol {
let ret = Symbol::from(self.next_id);
self.next_id = self.next_id.saturating_add(1 + FIRST_ID) - FIRST_ID;
ret
}
pub fn num_syms(&self) -> usize {
self.next_id as usize
}
pub fn generate(&mut self) -> Generate {
Generate { source: self }
}
}
pub trait SymbolContainer {
fn generate(source: &mut SymbolSource) -> Self;
}
macro_rules! impl_generate {
(Symbol, next_sym, $($T:ident, $next_sym:ident,)*) => (
impl SymbolContainer for ( Symbol $(, $T)* ) {
fn generate(source: &mut SymbolSource) -> Self {
(source.next_sym()
$(, source.$next_sym())*)
}
}
impl_generate!($($T, $next_sym,)*);
);
() => {}
}
impl_generate!(
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
Symbol, next_sym, Symbol, next_sym, Symbol, next_sym, Symbol, next_sym,
);
pub struct Generate<'a> {
source: &'a mut SymbolSource,
}
impl<'a> Iterator for Generate<'a> {
type Item = Symbol;
fn next(&mut self) -> Option<Self::Item> {
Some(self.source.next_sym())
}
}