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; Enumerate constants
const_def: MACRO
if _NARG >= 1
const_value = \1
else
const_value = 0
endc
if _NARG >= 2
const_inc = \2
else
const_inc = 1
endc
ENDM
const: MACRO
\1 EQU const_value
const_value += const_inc
ENDM
shift_const: MACRO
\1 EQU 1 << const_value
const_value += const_inc
ENDM
const_skip: MACRO
if _NARG >= 1
const_value += const_inc * (\1)
else
const_value += const_inc
endc
ENDM
const_next: MACRO
if (const_value > 0 && \1 < const_value) || (const_value < 0 && \1 > const_value)
fail "const_next cannot go backwards from {const_value} to \1"
else
const_value = \1
endc
ENDM
rb_skip: MACRO
if _NARG == 1
rsset _RS + \1
else
rsset _RS + 1
endc
ENDM
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