bobbylisp/SYNTAX.md

Syntax

This language is still in development, the syntax can be changed at anytime.

Hazure is a free-form syntax style, so the indentation is purely for readability.

fun main: void = do
    @write("Hello, World!");
end;

is the same as

fun main: void = do @write("Hello, World!"); end;

Hazure is also expression-oriented like OCaml. There are currently 10 expressions:

1. Comment

   -- Comment!
   -{ Block Comment }-
   

2. Values / Types

   1
   true
   "string"
   variable
   

3. Unary and Binary

   1 + 2
   !true
   

4. Call and Intrinsic. Intrinsic starts with a @

   @write("Hello")
   foo("bar")
   

5. Pipeline

   "Hello, World" |> @write(_)
   

6. Variable declaration

   let foo: int = 727;
   let bar: string = "Hi";
   let baz: boolean = true;
   

7. Function declaration

   fun foo: void = @write("void returns nothing");
   fun bar (x: int): int = x + 1;
   fun baz (x: int) (y: int): int = x + y;
   

8. If conditions

   let cond: bool = true;
   if cond then
       @write("True");
   else
       do
           @write("False");
       end;
   end;
   

9. Case matching

   case 1 + 1 of
       | 2 -> @write("Yes");
       | else @write("How?");
   end;
   

10. Do notation. It allows you to have multiple expression because something like right hand side of the function declaration fun a: int = ... can only have 1 expression. Do allows you to bypass that.

    do
        @write("Hello, World");
        foo(bar);
        let baz: int = 6 + 10;
    end;
    

Hazure isn't a scripting language, so, you will need a main function.

fun main: void = do
    @write("Hello, World");
    @write(34 + 35);
end;