odin-lang/Odin v0.4.0

Odin v0.4.0

on GitHub

What's New

• Compiler compiles as C++ rather than C
• Massive declaration syntax change
  • Declarations now use the Pascal-like prefix syntax
  • proc foo() {}
  • var x = 123;
  • var y: int = 123; (Type annotation)
  • const y = 123;
  • let z = false;
  • type Bar struct{};
  • import "fmt.odin";
  • import_load "bits.odin";
  • foreign_library "whatever.lib";
  • foreign_system_library "kernel32.lib";
• Pascal-like declaration grouping (except for procedures)

const (
	X: int = 123;
	Y      = 456; // copies above type e.g. `int` 
	Z      = 789; // ditto
)

• Default procedure arguments

proc foo(i: int = 123, s: string, b = false) { ... }
foo(s = "Hellope");
foo(b = true, s = "Potato");
foo(1337, "Googolplex");
foo(99, "Whatever", false);
// Cannot mix named and non-named - consistent with compound literals

• foreign blocks

foreign_library lib "some_lib.lib";
foreign lib {
	proc the_variable() -> bool #link_name "sl_the_variable";
}

• let single assignment variables
  • Replaces immutable

var a = 123; // Mutable variable
a = 456; // Okay
let x = 123; // Immutable variable
x = 456; // Cannot assign to again