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AlienCode — Language Reference Manual
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AlienCode is a simple calculation language.
All operations use function-call syntax. Below is the complete spec.
────────────── Values ──────────────
Integers 42, -5, 0
Floats 3.14, -0.5
Strings "hello", "world"
Booleans YES (true) NO (false)
────────────── Assignment ──────────────
SET x AS 5 assign 5 to x
SET x, y AS 1, 2 multiple assignment
────────────── Output ──────────────
EMIT(x) display x
EMIT(x, y, z) display several values (space-separated)
────────────── Arithmetic ──────────────
SHATTER(a, b) addition a + b
WEAVE(a, b) subtraction a − b
PARE(a, b) multiplication a × b
FRACTURE(a, b) division a ÷ b
COIL(a, b) power a ^ b
RESIDUE(a, b) modulo a mod b
HALVE(a, b) integer div a ÷ b (rounded down)
────────────── Comparison ──────────────
AKIN(a, b) equal a == b
APART(a, b) not equal a ≠ b
OVER(a, b) greater a > b
UNDER(a, b) less a < b
ATOP(a, b) greater-or-eq a >= b
BENEATH(a, b) less-or-eq a <= b
────────────── Logic ──────────────
BOND(a, b) logical AND
RIFT(a, b) logical OR
NEGATE(a) logical NOT
────────────── Sequences ──────────────
STRAND(1, 2, 3) create list [1, 2, 3]
KNOT(1, 2, 3) create tuple (1, 2, 3)
PLUCK(seq, i) element at index i (0-based)
CARVE(seq, start, stop) sub-sequence seq[start:stop]
ANNEX(seq, val) append val to end of seq
EXPEL(seq) remove & return last element
IMPRINT(seq, i, val) assign val to seq[i] (0-based)
────────────── Aggregation ──────────────
GAUGE(seq) length of seq
NADIR(a, b, …) minimum value
APEX(a, b, …) maximum value
SOME_OF(seq) true if any element is true
EVERY_OF(seq) true if all elements are true
ORDER(seq) sorted copy (ascending)
GATHER(iter) convert iterator to list
FUSE(a, b, …) concatenate values as string
────────────── Iteration ──────────────
EXTENT(n) [0, 1, …, n-1]
EXTENT(a, b) [a, a+1, …, b-1]
INDEX(seq) yields (index, value), index starts at 0
PAIR(a, b) pairs corresponding elements of a and b
STRAIN(func, seq) keeps elements where func(x) is true
────────────── Control Flow ──────────────
UPON condition: if
…
LEST condition: else-if
…
DEFAULT: else
…
SWEEP var IN iterable: for loop
…
WHILE condition: while loop
…
CEASE break
BYPASS continue
────────────── Functions ──────────────
CRAFT name(args): define function
…
DELIVER value return value
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