This project aims to study compilers, how they work and how to build them. To achieve this, I'm building it's parts separately so that I can bring them together sometime.

The first part is the scanner.

I implemented two scanners, one for JSON files and other for Java files. The first one aims to separate structuring from data tokens. That said, it identifies curly braces, colons and strings.

The java one identifies keywords, operators, identifiers and other java structure stuff, although there are some things that are missing (for example float literals, string literals, addresses, hexadecimal, etc).

You can test both scanners out. Let's start with the JSON one. First clone the repo using git clone https://github.com/Lorenzobattistela/compilers.git Then: cd compilers/scanner/json

If you're going to change one of the following files: main.c scanner.flex, make sure you have dependencies installed, because you need to recompile. You need gcc and flex:

To install flex: sudo apt install flex For windows, follow this.

If you did not change anything, simply make sure you have a file named somefile.json at compilers/scanner/java and then run the executable with:

./scanner.exe

You'll see the following output (using the same json i did):

If you changed anything, before running the executable, compile it with: flex -o flex.c scanner.flex gcc -o scanner.exe main.c flex.c

Now let's go to the Java project:

cd compilers/scanner/java

Make sure you have a file named test.java in the same directory. If you changed anything, before running the executable, compile it with: flex -o flex.c scanner.flex gcc -o scanner.exe main.c flex.c token.c

And run the executable with:

./scanner.exe

You'll se an output like:

Feel free to contribute and report any errors!

To run the parser, make sure you have bison and flex installed. Then, run the following commands: make This will result in a calc.exe file, and you can simply run it with: ./calc