ANTLR4 Toy language compiler that generates JVM bytecode

To build you'll need JDK 8 or newer. The build process is so simple that I've decided not to use any build tools.

To generate the parser code from the LANSet.g4 file run

./generateParser.sh

To build the compiler and generate the jar file run

./build.sh

If there are no errors you should have lansetc.jar in the current directory.

./runTests.sh

Let's create a file called example.lans and paste some example code:

programa example
    escriureln("Hello world!");
fprograma

Compile it to generate example.class

java -jar lansetc.jar example.lans

and run it!

java example

You should see the familiar string printed in your terminal.

• Exception in thread "main" java.lang.NoClassDefFoundError: org/antlr/v4/runtime/TokenSource
  • The jar needs to have access to lib/antlr-4.9.2-complete.jar in the current folder.