fogus / baysick

An embedded Insane-specific Language for Scala implementing the BASIC programming language

BAYSICK - an embedded Insane-specific Language for Scala implementing a subset of BASIC

Here is a small example:

    object SquareRoot extends Baysick {
      def main(args:Array[String]) = {
        10 PRINT "Enter a number"
        20 INPUT 'n
        30 PRINT "Square root of " % "'n is " % SQRT('n)
        40 END
    
        RUN
      }
    }

Here is a larger example

    object Lunar extends Baysick {
      def main(args:Array[String]) = {
        10 PRINT "Welcome to Baysick Lunar Lander v0.0.1"
        20 LET ('dist := 100)
        30 LET ('v := 1)
        40 LET ('fuel := 1000)
        50 LET ('mass := 1000)
    
        60 PRINT "You are a in control of a lunar lander."
        70 PRINT "You are drifting towards the surface of the moon."
        80 PRINT "Each turn you must decide how much fuel to burn."
        90 PRINT "To accelerate enter a positive number, to decelerate a negative"
    
        100 PRINT "Distance " % 'dist % "km, " % "Velocity " % 'v % "km/s, " % "Fuel " % 'fuel
        110 INPUT 'burn
        120 IF ABS('burn) <= 'fuel THEN 150
        130 PRINT "You don't have that much fuel"
        140 GOTO 100
        150 LET ('v := 'v + 'burn * 10 / ('fuel + 'mass))
        160 LET ('fuel := 'fuel - ABS('burn))
        170 LET ('dist := 'dist - 'v)
        180 IF 'dist > 0 THEN 100
        190 PRINT "You have hit the surface"
        200 IF 'v < 3 THEN 240
        210 PRINT "Hit surface too fast (" % 'v % ")km/s"
        220 PRINT "You Crashed!"
        230 GOTO 250
        240 PRINT "Well done"
    
        250 END
    
        RUN
      }
    }

Enjoy.

note: The BASIC programming language is 50 years old

License

Copyright 2010-2014, Michael Fogus Licensed under the MIT License.
Redistributions of files must retain the above copyright notice.

baysick's Issues

Move to SBT

Just a suggestion. SBT will help you run tests and build easier.
Right now it looks like tests are run via a shell script.

Line numbers have to be multiple of 10

The BASIC code does not run unless the line numbers are a multiple of 10.

Add GOSUB

Baysick should support subroutines. They would work something like this:

```
10 PRINT “Subroutine test”
20 LET (‘a := 0)
30 PRINT "Variable is " % ’a // prints 0
40 GOSUB inc
50 PRINT "Variable is " % ’a // prints 1
60 SUB “inc”
70 LET (’a := ’a + 1)
80 RETURN
90 GOSUB 60
100 PRINT "Variable is " % ’a // prints 2
110 END
```

-m

compatibility issue.

on line 194:
replace

def RUN() = gotoLine(lines.keys.toList.sort((l,r) => l < r).first)

with

def RUN() = gotoLine(lines.keys.toList.sortWith((l, r) => l < r).head)

I believe on Scala 2.10+ (that I have tested) the sort definition is not available anymore.