TomasCartman / Compiler

A compiler project to compile a language proposed by some teachers for the learning of the process of compilation

Compiler

A compiler project to compile a language proposed by some teachers for the learning of the process of compilation

This compiler is being made in kotlin language and for now it has only the lexical analyzer part finished, and the parser in progress

Lexical structure of language

Description	Expressions
Reserved Words	var const typedef struct extends procedure function start return if else then while read print int real boolean string true false global local
Identifiers	Letter ( Letter | Digit | _ )*
Numbers	Digit+(.Digit+)?
Digit	[0-9]
Letter	[a-z] | [A-Z]
Arithmetic Operators	+ - * / ++ --
Relational Operators	== != > >= < <= =
Logical Operators	&& || !
Comment Delimiters	// This is a line comment /* This is a block comment */
Delimiters	; , ( ) { } [ ] .
String	( Letter | Digit | Symbol | \" )
Symbol	ASCII from 32 to 126 (except 34)

Syntax example of code

procedure start {
    const {
        real pi = 3.1415;
    }

    typedef struct {
        var {
            int a = 1;
            string className = "test";
        }
    } test;

    var {
        int a, e = 3, d;
        string b="hi", c;
    }

    print("Choose the value of 'a'");
    read(a);

    d = pi * a;
    print(d);


    function int add(int a, int b) {
        return a + b;
    }

    procedure printSomething(string a) {
        print(a);
    }

    a = add(1, 2);
    printSomething("this.");
    add(3, 2);

    while(x > y) {
        if(a > b) {
            y = y + 1;
        } else if(h + 1 > c - b || p == 1) {
            y = y + h;
        }
    }
}