#pragma once

#include <stdint.h>

enum token_type {
  TOKEN_INVALID,
  TOKEN_EOF,
  TOKEN_IDENTIFIER,
  TOKEN_CONSTANT,
  TOKEN_INT,
  TOKEN_VOID,
  TOKEN_RETURN,
  TOKEN_LPAREN,
  TOKEN_RPAREN,
  TOKEN_LBRACE,
  TOKEN_RBRACE,
  TOKEN_SEMICOLON,
};

struct token {
  enum token_type type;
  int start;
  int end;
  int value;
};

struct lexer_state {
  const uint8_t * buf;
  int offset;
  int size;
};

struct token lexer_next_token(struct lexer_state * state);