calang is a Simple Programming language which is compiled into Java. This language contains simple arithmetic operations..

int a = 5;
int b = 10;
check(a > b) {
    a = 10;
    b = 5;
}otherwise{
    a = a - 1;
    b = b - 1;
}
show(a);

public class Main{
	public static void main(String... args){
		a = 5;
		b = 10;
		if(a > b){
			a = 10;
			b = 5;
		}else{
			a = a - 1;
			b = b - 1;
		}
                System.out.println(a);
	}
}

• Initialize variables
• Assign values to variables
• Arithmetic operations
  • Multiplication (*)
  • Division (/)
  • Subtraction (-)
  • Addition (+)
• Comparison operations
  • Equal (==)
  • Not Equal (!=)
  • Greater Than (>)
  • Less Than (<)
• If condition (check)
• Print (show)

I have antlr4 parser generator to create the parser. Currently, code is get compiled into Java in parse tree tier. I hope to develop the AST, which allows some semantic analysis as well. Currently, there is mock model for AST, but not fully implemented yet.

Here, I have used the visitor to traverse the parse-tree.

src folder contains all dev packages.

• antlr
• app
• ast
  • gen

Antlr generated parser, lexer, visitor and listener.

Entry point of the compiler

Mock model of the AST

Antlr2Java.java file contains the implementation for compiling calang into Java in parse tree tier.