message: Added `not` to "lib.dyon"
diff: @@ -232,6 +232,9 @@ fn max(array: [f64]) -> f64 { ... }
  /// Returns the length of 4D vector.
  fn norm(v: vec4) -> f64 { ... }
  +/// Logical NOT.
  +fn not(b: bool) -> bool { ... }
  +
  /// Returns x component of 4D vector.
  fn x(v: vec4) -> f64 { ... }
  