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An example of how to write a plugin for the Scala compiler.

This plugin adds a phase that traverses selected parts of the AST, generates corresponding BASIC code and writes it to a file.

Only supports a tiny subset of Scala/BASIC syntax.

First package the plugin into a jar:

$ sbt package

Then compile the sample code in src/main/test:

$ sbt test:compile

This will result in a BASIC file being created:

$ cat printHelloForever.bas
10 REM
20 PRINT "Hello Scala World"
30 GOTO 10

Run the file in a BASIC interpreter of your choice (I used Chipmunk BASIC on OSX).

$ basic printHelloForever.bas
Hello Scala World
Hello Scala World
Hello Scala World
Hello Scala World
...