#include "parser.h"
#include "lexer.h"
#include "assert.h"

struct token_reader {
  bool have_token;
  struct token token;
  struct lexer_state lexer_state;
};

struct token peek(struct token_reader * reader)
{
  if (reader->have_token) {
    return reader->token;
  } else {
    reader->token = lexer_next_token(reader->lexer_state);
    reader->have_token = true;
    return reader->token;
  }
}

struct token consume(struct token_reader * reader)
{
  struct token token = peek(reader);
  reader->have_token = false;
}

void expect_type(struct token_reader * reader, enum token_type token_type)
{
  struct token token = consume(reader);
  if (!(token->type == token_type)) {
    printf("token->type=%d token_type=%d\n", token->type, token_type);
    fail(token->type == token_type);
  }
}