#include <stdio.h>
#include <stdlib.h>

#include "util-tables.c"
#include "slr-table.c"
#include "lr-parser.c"

enum symbol {
    PLUS = 0,
    MINUS,
    LPAREN,
    RPAREN,
    N0, N1,
    END_INPUT,

    EP, E, T, N,
    SYMBOLS_END,
};

const size_t total_symbols = SYMBOLS_END;

int symbol_is_terminal(symbol s)    { return s < EP; }
int symbol_is_input_end(symbol s)   { return s == END_INPUT; }
int symbol_is_valid(symbol s)       { return s < SYMBOLS_END; }

#define PROD(LHS, _, ...) {LHS, (symbol[]){__VA_ARGS__}, sizeof((symbol[]){__VA_ARGS__})/sizeof(symbol)}
struct production grammar[] = {
    PROD(EP, ->, E, END_INPUT),
    PROD(E, -->, E, PLUS, T),
    PROD(E, -->, E, MINUS, T),
    PROD(E, -->, T),
    PROD(T, -->, LPAREN, E, RPAREN),
    PROD(T, -->, N),
    PROD(N, -->, N0),
    PROD(N, -->, N1),
};

const size_t total_productions = sizeof(grammar)/sizeof(*grammar);

symbol toklist[] = {N0, PLUS, N1, MINUS, N0, N0, END_INPUT};
symbol *tok = toklist;

symbol toklist_eat() { return *(tok++); }
symbol toklist_peek() { return *tok; }

int main(void)
{
    util_tables_fill();
    table_allocate();

    itemset_handle((struct item[]){{0, 0}}, 1);

    lr_parser() && (exit(1), 1);

    seen_sets_free();
    table_free();
    util_tables_free();

    return r;
}