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Leafscript

Leafscript is a lightweight programming language created as a proof of concept by someone with no idea how to write a language. It's written entirely in Golang, and was inspired by the speed and simplicity of Lua. It can be compiled from source to a binary .exe file using the command: go build Leafscipt

Usage

Programs can be run from the command line using the Leafscript binary file.

leafscript --run [PATH TO .lfs FILE] --debug [SET TO FALSE BY DEFAULT]

E.g.

leafscript --run program.lfs

Includes a basic debugger that prints a list of all variables every line. E.g.

leafscript --run program.lfs --debug true

Features

It supports:

  • Creating and modifying variables (strings, ints and floats)
  • Performing mathematical operations on numeric variables
  • String concatenation
  • For loops
  • If/else statements
  • Breaks in for loops
  • Nested if/for
  • Basic debugging mode that prints all variables every line

No plans to implement in near future

  • Array variables
  • Error messages

Examples

Ensure tabs are used to indent and not spaces. Spaces do not work

Additional language examples are contained within the "Examples" file

Find all the factors of a number

var number = inputint "Enter a number to find factors of: "

for x math number+1
	if math number%x == 0
		print concat math x & " is a factor of " & math number
	endif
endfor

Print all binary numbers from 0 to 15

for x 2
	for y 2
		for z 2
			for i 2
				print concat math x & " " & math y & " " & math z & " " & math i
			endfor
		endfor
	endfor
endfor

Print all primes up to a given number

var number = inputint "Enter a number to find primes up to: "
var total = 0

for x math number
	var y = 0
	for i math x
		if math x%i == 0
			var y = math y+1
		endif
	endfor

	if math y < 2
		print concat math x & " is prime"
		var total = math total+1
	endif
endfor

print concat math total & " primes found"

Changelog

v1.0

  • Initial release

v1.1

  • Modified command line interface to use more robust argparse library
  • Added ability to package .lfs files to .exe using PackageFile.exe

v1.1.1

  • Fixed imports

v1.2

  • Removed poor implementation of packaging files to binary