/* One operand, one result. */
#define UNARY_OPERATOR(NAME) DEFINE_OPERATOR (NAME, 0, OP_NO_FLAGS, 0)

/* Two operands, one result. */
#define BINARY_OPERATOR(NAME) DEFINE_OPERATOR (NAME, -1, OP_NO_FLAGS, 0)

/* Three operands, one result. */
#define TERNARY_OPERATOR(NAME) DEFINE_OPERATOR (NAME, -2, OP_NO_FLAGS, 0)

/* Variable operands, one result. */
#define NARY_OPERATOR(NAME, FLAGS, ARGS) \
	DEFINE_OPERATOR (NAME, 0, OP_VAR_ARGS | OP_ABSORB_MISS | (FLAGS), ARGS)

/* No operands, one result. */
#define TERMINAL(NAME, ARGS) DEFINE_OPERATOR (NAME, +1, OP_NO_FLAGS, ARGS)

/* Basic operators. */
BINARY_OPERATOR (ADD)
BINARY_OPERATOR (SUB)
DEFINE_OPERATOR (MUL, -1, OP_ABSORB_MISS, 0)
DEFINE_OPERATOR (DIV, -1, OP_ABSORB_MISS, 0)
DEFINE_OPERATOR (MOD, -1, OP_ABSORB_MISS, 0)
DEFINE_OPERATOR (POW, -1, OP_ABSORB_MISS, 0)
DEFINE_OPERATOR (AND, -1, OP_ABSORB_MISS, 0)
DEFINE_OPERATOR (OR, -1, OP_ABSORB_MISS, 0)
UNARY_OPERATOR (NOT)

/* Numeric relational operators. */
BINARY_OPERATOR (EQ)
BINARY_OPERATOR (GE)
BINARY_OPERATOR (GT)
BINARY_OPERATOR (LE)
BINARY_OPERATOR (LT)
BINARY_OPERATOR (NE)

/* String relational operators. */
BINARY_OPERATOR (EQ_STRING)
BINARY_OPERATOR (GE_STRING)
BINARY_OPERATOR (GT_STRING)
BINARY_OPERATOR (LE_STRING)
BINARY_OPERATOR (LT_STRING)
BINARY_OPERATOR (NE_STRING)

/* Unary functions. */
UNARY_OPERATOR (NEG)
UNARY_OPERATOR (ABS)
UNARY_OPERATOR (ARCOS)
UNARY_OPERATOR (ARSIN)
UNARY_OPERATOR (ARTAN)
UNARY_OPERATOR (COS)
UNARY_OPERATOR (EXP)
UNARY_OPERATOR (LG10)
UNARY_OPERATOR (LN)
UNARY_OPERATOR (MOD10)
UNARY_OPERATOR (RND)
UNARY_OPERATOR (SIN)
UNARY_OPERATOR (SQRT)
UNARY_OPERATOR (TAN)
UNARY_OPERATOR (TRUNC)

/* N-ary numeric functions. */
NARY_OPERATOR (ANY, 0, 1)
NARY_OPERATOR (ANY_STRING, 0, 1)
NARY_OPERATOR (CFVAR, OP_MIN_ARGS, 2)
NARY_OPERATOR (MAX, OP_MIN_ARGS, 2)
NARY_OPERATOR (MAX_STRING, 0, 1)
NARY_OPERATOR (MEAN, OP_MIN_ARGS, 2)
NARY_OPERATOR (MIN, OP_MIN_ARGS, 2)
NARY_OPERATOR (MIN_STRING, 0, 1)
NARY_OPERATOR (NMISS, 0, 1)
NARY_OPERATOR (NVALID, 0, 1)
NARY_OPERATOR (RANGE, 0, 1)
NARY_OPERATOR (RANGE_STRING, 0, 1)
NARY_OPERATOR (SD, OP_MIN_ARGS, 2)
NARY_OPERATOR (SUM, OP_MIN_ARGS, 2)
NARY_OPERATOR (VARIANCE, OP_MIN_ARGS, 2)

/* Time construction & extraction functions. */
TERNARY_OPERATOR (TIME_HMS)
UNARY_OPERATOR (CTIME_DAYS)
UNARY_OPERATOR (CTIME_HOURS)
UNARY_OPERATOR (CTIME_MINUTES)
UNARY_OPERATOR (CTIME_SECONDS)
UNARY_OPERATOR (TIME_DAYS)

/* Date construction functions. */
TERNARY_OPERATOR (DATE_DMY)
TERNARY_OPERATOR (DATE_MDY)
BINARY_OPERATOR (DATE_MOYR)
BINARY_OPERATOR (DATE_QYR)
BINARY_OPERATOR (DATE_WKYR)
BINARY_OPERATOR (DATE_YRDAY)
TERNARY_OPERATOR (YRMODA)

/* Date extraction functions. */
UNARY_OPERATOR (XDATE_DATE)
UNARY_OPERATOR (XDATE_HOUR)
UNARY_OPERATOR (XDATE_JDAY)
UNARY_OPERATOR (XDATE_MDAY)
UNARY_OPERATOR (XDATE_MINUTE)
UNARY_OPERATOR (XDATE_MONTH)
UNARY_OPERATOR (XDATE_QUARTER)
UNARY_OPERATOR (XDATE_SECOND)
UNARY_OPERATOR (XDATE_TDAY)
UNARY_OPERATOR (XDATE_TIME)
UNARY_OPERATOR (XDATE_WEEK)
UNARY_OPERATOR (XDATE_WKDAY)
UNARY_OPERATOR (XDATE_YEAR)

/* String functions. */
NARY_OPERATOR (CONCAT, 0, 0)
BINARY_OPERATOR (INDEX_2)
TERNARY_OPERATOR (INDEX_3)
BINARY_OPERATOR (RINDEX_2)
TERNARY_OPERATOR (RINDEX_3)
UNARY_OPERATOR (LENGTH)
UNARY_OPERATOR (LOWER)
UNARY_OPERATOR (UPPER)
DEFINE_OPERATOR (LPAD, -2, OP_ABSORB_MISS, 0)
DEFINE_OPERATOR (RPAD, -2, OP_ABSORB_MISS, 0)
UNARY_OPERATOR (LTRIM)
UNARY_OPERATOR (RTRIM)
DEFINE_OPERATOR (NUMBER, -1, OP_FMT_SPEC, 3)
DEFINE_OPERATOR (STRING, 0, OP_FMT_SPEC | OP_ABSORB_MISS, 3)
DEFINE_OPERATOR (SUBSTR_2, -1, OP_ABSORB_MISS, 0)
DEFINE_OPERATOR (SUBSTR_3, -2, OP_ABSORB_MISS, 0)

/* Artificial. */
UNARY_OPERATOR (SQUARE)
UNARY_OPERATOR (NUM_TO_BOOL)

/* Weirdness. */
UNARY_OPERATOR (NORMAL)
UNARY_OPERATOR (UNIFORM)
DEFINE_OPERATOR (SYSMIS, 0, OP_ABSORB_MISS, 0)
DEFINE_OPERATOR (VEC_ELEM_NUM, 0, OP_MIN_ARGS, 1)
DEFINE_OPERATOR (VEC_ELEM_STR, 0, OP_MIN_ARGS, 1)

/* Terminals. */
TERMINAL (NUM_CON, 0)
TERMINAL (STR_CON, 0)
TERMINAL (NUM_VAR, 0)
TERMINAL (STR_VAR, 0)
TERMINAL (NUM_LAG, 1)
TERMINAL (STR_LAG, 1)
TERMINAL (NUM_SYS, 1)
TERMINAL (NUM_VAL, 1)
TERMINAL (STR_MIS, 1)
TERMINAL (CASENUM, 0)

#undef DEFINE_OPERATOR