torch.ValidateScalar

export type ValidateScalar<S extends Shape> = S extends readonly []
  ? number // Valid scalar
  : number extends S['length']
    ? number // Dynamic shape, can't check at compile time
    : item_error_not_scalar<S>;

Sextends Shape

Validate that a shape is a scalar (empty tuple). Returns number if valid, error type otherwise.

Examples

type A = ValidateScalar<readonly []>;      // number ✓
type B = ValidateScalar<readonly [2, 3]>;  // item_error_not_scalar<...> ✗