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Constants & Variables: SSTNPL's new Integer Constants

thomasthespacefox profile image Thomas Leathers ・2 min read

Part 1: SSTNPL Integer background

SSTNPL (A Programming Language for my Balanced Ternary VM: SBTCVM), f has always had integer variables, as they were part of its original design. creating & using integer variables in SSTNPL is easy enough:

#create 3 variables using: decimal, ternary, & a character value.
var bob=@11
var bob2=*+0-
var bob3=:L
#dump the decimal values of each variable to SBTCVM's Terminal
dumpd bob
dumpd bob2
dumpd bob3

Part 2: The Integer Literal Syntax

However, we can also just use SSTNPL's 'literal' syntax, that's supported on most integer input arguments:

#same as above, just using the 'literal' syntax
dumpd @11
dumpd *+0-
dumpd :L

Part 3: The builtin constants

Whats changed in SSTNPL, is the introduction of a special, forth 'literal' syntax: the constant. Currently, SSTNPL has 2 of them builtin:

#$true=1, $false=0
dumpd $true
dumpd $false

Part 4: Use a custom constant to store a module's version number.

while there are still some holes (you can't use constants in var & val statements yet for example), We can use constants to provide static values that when not used, don't use up Memory:

for example, in an SSTNPL module called 'bob':

const version=@15

That way we could write an SSTNPL program like this:

#print version of bob module
prline Bob version:
dumpd $b.version

#wait for keystroke, then power-off the VM
keyprompt
stop

include bob as b

Conclusion

While SSTNPL & SBTCVM are still technically in alpha, and aren't that useful for practical purposes, I've put a lot of work into both, & hope others find programming a Balanced Ternary VM as interesting as I do.

SBTCVM Gen2-9 On github: https://github.com/SBTCVM/SBTCVM-Gen2-9
SSTNPL Language docs: https://github.com/SBTCVM/SBTCVM-Gen2-9/tree/master/textdocs/SSTNPL

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thomasthespacefox profile

Thomas Leathers

@thomasthespacefox

Hi, I'm Thomas, chief developer of the SBTCVM project, and all around artist and programmer. I do have more of an understanding of balanced ternary than most i would say.

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