Initial revision of "T7", the compiler from hell

[T7] / plain.h

/*
 * Copyright (C) 2018 Nicolas Mauger
 * This file is subject to the terms and conditions of the
 * CeCILL free software license agreement. See the file
 * LICENSE in the main directory of T7 for more details.
 */

void statements();
void expression();
void expr_prime();
void term();
void term_prime();
void factor();