#ifndef _GE_EXPR_
#define _GE_EXPR_

#include <inttypes.h>

typedef struct GE_EXPRESSION_ GE_EXPRESSION;
struct GE_EXPRESSION_ {
  char *name;
  const char *type;
  GE_EXPRESSION *next;
  GE_EXPRESSION *down;
  GE_EXPRESSION *arg;
  GE_EXPRESSION *details;
  GE_EXPRESSION *parent;
  uint8_t is_range;
  uint8_t kind;
  uint16_t up_frame_count;
  int32_t column;
};

typedef enum {
  is_count = 1,
  is_all,
  is_if,
  is_bracket,
  is_details,
  is_placeholder,
  is_equality,
  is_character,
  is_integer,
  is_real,
  is_string,
} KindOfExpression;

enum {
  plus_op = 1,
  minus_op,
  mult_op,
  div_op,
  idiv_op,
  imod_op,
  power_op,
  not_op,
  and_op,
  or_op,
  xor_op,
  implies_op,
  interval_op,
  eq_op,
  ne_op,
  le_op,
  lt_op,
  ge_op,
  gt_op,
  sim_op,
  nsim_op,
} OpearationSymbol;

extern GE_EXPRESSION *GE_new_expression();
extern void GE_push_back(GE_EXPRESSION **ex);

extern GE_EXPRESSION *expr_bottom(GE_EXPRESSION *expr);
extern GE_EXPRESSION *expr_last(GE_EXPRESSION *expr);

#endif