;; Heap types
func
funcref
(ref func)
extern
externref
(ref extern)
any
anyref
(ref any)
eq
eqref
(ref eq)
i31
(ref null i31)
i31ref
(func)
(struct)
(array i32)

;; Signature
(func)
(ref $func.0)
(ref null $func.0)
(func (param i32) (result f64))
(ref $func.0)
(ref null $func.0)

;; Struct
(struct)
(ref $struct.0)
(ref null $struct.0)
(struct (field i32 i64 (mut f32) (mut f64) externref))
(ref $struct.0)
(ref null $struct.0)

;; Array
(array i32)
(ref $array.0)
(ref null $array.0)
(array (mut externref))
(ref $array.0)
(ref null $array.0)

;; Tuple
()
none
(i32 f64 externref)
(i32 f64 externref)

;; Rtt
(rtt 0 func)
(rtt 0 func)
(rtt 1 extern)
(rtt 1 extern)
(rtt 2 any)
(rtt 2 any)
(rtt 3 eq)
(rtt 3 eq)
(rtt 4 i31)
(rtt 4 i31)
(rtt 6 $func.0)
(rtt 6 $func.0)
(rtt 7 $struct.0)
(rtt 7 $struct.0)
(rtt 8 $array.0)
(rtt 8 $array.0)

;; Signature of references (param/result)
(func (param (ref null $struct.0)) (result (ref $array.0)))

;; Signature of references (params/results)
(func (param (ref null $struct.0) (ref $array.0)) (result (ref $struct.0) (ref null $array.1)))

;; Struct of references
(struct (field (ref $func.0) (mut (ref $func.0)) (ref null $func.0) (mut (ref null $func.0))))
(ref $struct.0)
(ref null $struct.0)
(struct (field (ref $struct.0) (mut (ref $struct.0)) (ref null $struct.0) (mut (ref null $struct.0))))
(ref $struct.0)
(ref null $struct.0)
(struct (field (ref $array.0) (mut (ref $array.0)) (ref null $array.0) (mut (ref null $array.0))))
(ref $struct.0)
(ref null $struct.0)
(struct (field (mut i32) (mut (ref null $func.0)) (mut (ref null $struct.0)) (mut (ref null $array.0))))
(ref $struct.0)
(ref null $struct.0)

;; Array of references
(array (ref null $func.0))
(ref $array.0)
(ref null $array.0)
(array (mut (ref null $struct.0)))
(ref $array.0)
(ref null $array.0)
(array (ref null $array.0))
(ref $array.0)
(ref null $array.0)

;; Tuple of references
((ref $func.0) (ref null $func.0) (ref $struct.0) (ref null $struct.0) (ref $array.0) (ref null $array.0))
((ref $func.0) (ref null $func.0) (ref $struct.0) (ref null $struct.0) (ref $array.0) (ref null $array.0))

;; Recursive (not really)
(func (param (ref $func.0)))
(ref $func.0)
(func (param (ref $array.0)))
(ref $func.0)