#pragma once

#include "iostream.hfa"

forall( istype & | istream( istype ), E | CfaEnum( E ) | Serial(E) )
istype & ?|?( istype &, E & );

forall( ostype & | ostream( ostype ), E | CfaEnum( E ) ) {
	ostype & ?|?( ostype &, E );
	OSTYPE_VOID( E );
}

static inline
forall( E | CfaEnum(E) | Serial(E) ) {
	int ?==?( E l, E r ) { return posn( l ) == posn( r ); }	// relational operators
	int ?!=?( E l, E r ) { return posn( l ) != posn( r ); }
	int ?<?( E l, E r ) { return posn( l ) < posn( r ); }
	int ?<=?( E l, E r ) { return posn( l ) <= posn( r ); }
	int ?>?( E l, E r ) { return posn( l ) > posn( r ); }
	int ?>=?( E l, E r ) { return posn( l ) >= posn( r ); }

	E ++?( E & l ) { 									// increment operators
		int pos = posn(l);
		l = fromInt_unsafe(pos+1);
		return l;
	}

	E --?( E & l ) {
		int pos = posn(l);
		l = fromInt_unsafe(pos-1);
		return l;
	}

	E ?+=? ( E & l, one_t ) {
		int pos = posn(l);
		l = fromInt_unsafe(pos+1);
		return l;
	}

	E ?-=? ( E & l, one_t ) {
		int pos = posn(l);
		l = fromInt_unsafe(pos-1);
		return l;
	}

	E ?+=? ( E & l, int i ) {
		int pos = posn(l);
		l = fromInt_unsafe(pos+i);
		return l;
	}

	E ?-=? ( E & l, int i ) {
		int pos = posn(l);
		l = fromInt_unsafe(pos-i);
		return l;
	}

	E ?++( E & l ) {
		int pos = posn(l);
		l = fromInt_unsafe(pos+1);
		return fromInt_unsafe(pos);
	}

	E ?--( E & l ) {
		int pos = posn(l);
		l = fromInt_unsafe(pos-1);
		return fromInt_unsafe(pos);
	}
}