SharpLox

Hello there and welcome to SharpLox, a modified version of the lox language designed by Robert Nystrom implemented in C#.

Running the interpreter

Simply clone and run the command

dotnet run <fully qualified path to .slox file>

Example

➜ cat test.slox
       │ File: test.slox
   1   │ print("hi");

➜ dotnet run --project CommandLine/CommandLine.csproj /Users/jaymadden/programming/projects/SharpLox/test.slox 
hi

The basics

Variable declarations

var i = 4;
var j = 4;

print(i + j);

Null handling

var a = nil;

if true {
    a = 4;
}

print(a)

Control Flow

Standard control flow concepts are implemented

if statements

var state = true;

if state {
    print("Hello there");
}
else {
    print("Hi there");
}

while and for loops

var i = 0;

while i < 10 {
    print(i);
    i = i + 1;
}

for var i = 0; i < 10; i = i + 1 {
    print(i);
}

Break

var i = 0;

while true {
    print(i);
    i = i + 1;

    if i > 10 {
        break;
    }
}

Functions

Top level functions are supported

func someMethod(k) {
    var i = 4;
    var j = 4;

    print(i + j + k);
}

someMethod(k);

Anonymous functions

func someMethod(lambda) {
    lambda(1);
}

var someLambda = func(foo) {
    print(foo + 1);
}

someMethod(someLambda);

Classes

class Foo {
    func init(baz) {
        this.bar = baz;
    }

    func printBar() {
        print(this.bar);
    }
}

var f = Foo(5);
f.printBar();

class Foo {
    func init(baz) {
        this.bar = baz;
    }

    func printBar() {
        print(this.bar);
    }
}

class Baz : Foo {

    func init() {
        super.init(5);
    }

    func something() {
        print("Hi from baz");
    }
}

var f = Baz();
f.printBar();