Runtime standard libraries

[!Summary] This page documents standard-library functions verified in Vortex Studio 0.3.4. It lists tested coroutine, math, string, and table functions, along with observed behavior and unavailable library features.

Verified runtime compatibility

The following standard-library functions were called by the deterministic behavior probe in both Script and LocalScript in Vortex Studio 0.3.4. Every call listed below succeeded with the documented result.

coroutine

close, create, isyieldable, resume, running, status, wrap, yield

math

abs, acos, asin, atan, atan2, ceil, clamp, cos, cosh, deg, exp, floor, fmod, frexp, ldexp, lerp, log, log10, map, max, min, modf, noise, pow, rad, random, randomseed, round, sign, sin, sinh, sqrt, tan, tanh

string

byte, char, find, format, gmatch, gsub, len, lower, match, pack, packsize, rep, reverse, split, sub, unpack, upper

table

clear, clone, concat, create, find, foreach, foreachi, freeze, getn, insert, isfrozen, maxn, move, pack, remove, sort, unpack

Observed deterministic behavior

These are observations for the exact inputs tested through a local script, rather than a claim that the full Luau standard-library contract is implemented.

coroutine

close on a suspended coroutine returned true and left it dead.
create returned a thread; isyieldable() returned true; a fresh coroutine reported suspended.
resume returned true, 42 for a coroutine that added one to 41; wrap returned 42 for a coroutine that doubled 21; and yield returned true, "yielded" from its first resume.
Inside a coroutine, running() returned a thread and a nil main-thread flag.

table

Call	Observed result
`clear({1, 2})`	length `0`
`clone({value = 5})`, then mutate clone	source `5`; clone `7`
`concat({"a", "b", "c"}, "-")`	`"a-b-c"`
`create(3, "x")`	length `3`; first/last `"x"`
`find({"a", "b"}, "b")`	`2`
`foreach({a = 2, b = 3}, ...)` / `foreachi({2, 3}, ...)`	sum `5` / `5`
`freeze({1})`, then `isfrozen`	`true`
`getn({1, 2, 3})`	`3`
`insert({1, 3}, 2, 2)`	`"1,2,3"`
`maxn({[2] = true, [5] = true})`	`5`
`move({"a", "b"}, 1, 2, 3, {})`	destination `"a", "b"` at `3`, `4`
`pack("a", nil, "c")`	`n = 3`; values `"a"`, `"c"`
`remove({"a", "b"}, 1)`	removed `"a"`; remaining length `1`, first `"b"`
`sort({3, 1, 2})`	`"1,2,3"`
`unpack({"a", "b"})`	`"a", "b"`

string

Call	Observed result
`byte("A")`; `char(65, 66)`	`65`; `"AB"`
`find("vortex", "tex")`; `format("%s:%d", "vortex", 7)`	`4, 6`; `"vortex:7"`
`gmatch("a,b", "[^,]+")`; `gsub("a-b", "-", "+")`	`"a", "b"`; `"a+b", 1`
`len`, `lower`, `match`	`6`; `"vortex"`; `"tex"`
`pack("<I2", 300)`; `packsize("<I2")`	byte length `2`; `2`
`rep("ab", 3)`; `reverse("vortex")`	`"ababab"`; `"xetrov"`
`split("a,b", ",")`; `sub("vortex", 2, 4)`	`2, "a", "b"`; `"ort"`
`unpack("<I2", pack("<I2", 300))`; `upper("VoRtEx")`	`300, 3`; `"VORTEX"`

math

Call	Observed result
`abs(-3)`, `ceil(1.2)`, `floor(1.8)`, `round(1.5)`, `sign(-5)`	`3`, `2`, `1`, `2`, `-1`
`acos(0.5)`, `asin(0.5)`, `atan(1)`, `atan2(1, 1)`	`1.0471975511965979`, `0.5235987755982989`, `0.7853981633974483`, `0.7853981633974483`
`clamp(5, 0, 3)`, `cos(0)`, `cosh(0)`, `deg(pi)`	`3`, `1`, `1`, `180`
`exp(1)`, `fmod(-7, 3)`, `frexp(8)`, `ldexp(0.5, 4)`	`2.718281828459045`, `-1`, `0.5, 4`, `8`
`lerp(0, 10, 0.25)`, `log(8)`, `log10(1000)`, `map(0.25, 0, 1, 0, 100)`	`2.5`, `2.0794415416798357`, `3`, `25`
`max(1, 5, 3)`, `min(1, 5, 3)`, `modf(1.25)`	`5`, `1`, `1, 0.25`
`noise(0.25, 0.5, 0.75)`, `pow(2, 3)`, `rad(180)`	`-0.2697153091430664`, `8`, `3.141592653589793`
`random()`	a `number`
`sin(0)`, `sinh(0)`, `sqrt(9)`, `tan(0)`, `tanh(0)`	`0`, `0`, `3`, `0`, `0`
`randomseed(12345)`	no return values

Testing Notes

The unavailable compatibility surface was also revalidated in 0.3.4 in both Script and LocalScript: bit32, buffer, debug, os, utf8, vector, and shared are nil. math.isfinite, math.isinf, math.isnan, task.cancel, task.desynchronize, and task.synchronize are also nil.