MiniJava semantic checker
A semantic checker for MiniJava programs, using the visitor design pattern. If a program is semantically correct, it prints in the standard output, the offsets of the fields and the methods of the classes. These offsets are defined as:
- 1 byte for
booleantypes - 4 bytes for
integertypes - 8 bytes for
int[], classes and functions
MiniJava is a subset of Java, it has many familiar features and it can be fully
compiled with javac. The BNF version of MiniJava can be found
here.
Getting Started
Prerequisites
- A modern Java version.
JTB(Java Tree Builder) is required to build the visitors.- JavaCC, to create the parser off the provided grammar file.
The above tools may be provided by your distribution’s package manager (on Linux
systems). In this case, the makefile will need to be changed accordingly, to
point to the location of the JTB and JavaCC executables.
Downloading
To acquire this repo type on a terminal:
git clone https://github.com/aakordas/mj-semantic-checker
Enter the newly created directory with:
cd mj-semantic-checker
Building
To build the program, just type
make
on the command line and the program will start compiling, provided the .jar
files for JTB and JavaCC are in the project’s directory.
Running
To run the program, just type, after a successful compilation:
java Main <file1> <file2> ...
Where <file1>, <file2>, etc. are the files you want to be checked. In case of
an incorrect file, an error message is printed and the program continues to the
next file, if any.
Disclaimer
This program is not fully complete, yet, It works mostly fine, but it has some issues when there is inheritance in the input programs. It’s a work in progress.