Builtins

Built-in named operations, beyond the symbolic operators.

Collection

name	stack effect	description
`len`	`coll → int`	length of list / string / binary
`nth`	`coll i → elem`	zero-indexed access
`tl`	`list → list`	tail (drop first)
`rev`	`list → list` / `str → str`	reverse
`srt`	`list → list`	sort
`take`	`coll n → coll`	first n elements
`skip`	`coll n → coll`	drop first n elements
`zip`	`lhs rhs → list`	pair-wise zip into list of pairs
`range`	`lo hi → list`	integer range `[lo .. hi-1]`
`cut`	`str delim → list`	split string by delimiter
`cat`	`list delim → str`	join list with delimiter
`flat`	`list → list`	flatten one level (prelude)

Every type name is a constructor. They convert the top-of-stack value to the given type, or fail with a useful error.

int                  str         bin
u8 u16 u32 u64 u128 u256
i8 i16 i32 i64 i128 i256
f16 f32 f64

42 f64       # → 42.0
3.7 int      # → 3      (truncates)
42 str       # → "42"   (number to decimal string)

name	stack effect	description
`import`	`path →`	load and evaluate a file