A stack based programming language written in lua
| type |
examples or description |
| number |
1, 2, 3, ... |
| char |
'a, 'b, ... |
| string |
"..." |
| name |
var, age, ... |
| keyword |
if, repeat, local, set, macro |
| operation |
+, -, dup, ... |
| sub |
( ... ) |
If you just write a number, char or string in your program, it'll be put on the stack.
If you write a name in your program, the value of that name will be put on the stack if registered in variables or locals, if registered in macros then the macro will be performed
| operation |
action display |
description |
+ |
a b -> a+b |
adds a with b |
- |
a b -> a-b |
subtracts b from a |
* |
a b -> a*b |
multiply a with |
/ |
a b -> a/b |
divides b from a |
** |
a b -> a^b |
raises a to the power of b |
= |
a b -> a=b |
compares a and b for equality (true = 1, false = 0) |
! |
0 -> 1 & 1 -> 0 |
negates a |
!= |
a b -> a≠b |
compares a and b for none equality |
< |
a b -> a<b |
compares for a is less than b |
> |
a b -> a>b |
compares for a is greater than b |
<= |
a b -> a≤b |
compares for a is less than or equal to b |
>= |
a b -> a≥b |
compares for a is greater than or equal to b |
# |
a -> a stack[a] |
gets value of index a |
drop |
a b -> a |
removes the top value from stack |
dup |
a b -> a b b |
copies the top value to the top of the stack |
swap |
a b c -> a c b |
swaps top two values of the stack |
over |
a b c -> a b c b |
puts a copy of the second top of the stack value to the top |
pick |
a b c -> a b c a |
puts a copy of the bottom value of the stack to the top |
rot |
a b c d -> a c d b |
moves the third top value of the stack to the top |
roll |
a b c d -> b c d a |
moves the bottom value of the stack to the top |
shift |
a b c -> b c |
pops the last value of the stack |
sort |
a b c -> value dependent |
sorts the stack values from low to high |
sum |
a b c -> a+b+c |
sums up the stack values |
prod |
a b c -> a*b*c |
multiplies all the stack values |
range |
a b -> value dependent |
puts every whole number from a to b on the stack |
print |
a b c -> a b |
prints the top stack value to the console and pops it |
write |
a b c -> a b |
writes the top stack value to the console and pops it |
input |
a -> a (number input) |
takes user input and puts it at the top (0 if input is NaN) |
rev |
a b c d -> d c b a |
reverses the stack values |
max |
a b -> max(a,b) |
pops the lower value and keeps the higher value of a and b |
min |
a b -> min(a,b) |
pops the higher value and keeps the lower value of a and b |
flr |
a -> floor(a) |
pops a and puts rounded down a on the stack |
ceil |
a -> ceil(a) |
pops a and puts rounded up a on the stack |
len |
a -> a (stack length) |
puts the stack size as a number on the stack |
con |
a b -> a..b |
concatenates a with b and puts the string on the stack |
number |
a -> tonumber(a) |
casts the top stack value to a number |
string |
a -> tostring(a) |
casts the top stack value to a string |
char |
a -> tochar(a) |
casts the top stack value to a character |
clock |
a -> a (os.clock()) |
puts the clock time as a number on the stack |
| keyword |
description |
if |
executes following token if the top stack value isn't 0 and pops the top stack value |
repeat |
executes following token top stack value's times and pops the top stack value |
set |
sets the following name if registered in variables to the top stack value and pops the value of the stack |
local |
sets the following name if registered in locals to the top stack value and pops the value of the stack |
macro |
registers 1st following name with the 2nd following token in the macros |
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