Helix

Attention! This document is pre-draft and will be unstable until compiler becomes MVP status.

Syntax

Functions

Minimal function declaration:

def func1() {}

Function with arguments and return type:

def func2(a: Int, b: Int): Bool {
    return false;
}

If return type is not specified - its considered as void

Variables

Two variable of type Int. First - immutable(initializes once, cannot be reassigned). Second - mutable.

let a: Int = 1;
var b: Int = 2;

a = 3; // Error: variable `a` is immutable
b = 4; // Ok

Data types

Signed integers:

Bits	Signed	Range
8	Byte	-128..127
16	Short	-32768..32767
32	Int	-2147483648..2147483647
64	Long	-9223372036854775808..
		+9223372036854775807

Unsigned integers:

Bits	Type	Range
8	UByte	0..255
16	UShort	0..65535
32	UInt	0..4294967295
64	ULong	0..18446744073709551615

Floating point:

Bits	Type	Min/Max
32	Float	1.2e-38 / 3.4e+38
64	Double	2.3e-308 / 1.7e+308