Many compiling error ocures when running `Primary Type` example from playgroud.

[changrui]

./type.go:32:6: undefined: Slice_Append
./type.go:35:35: undefined: Slice_Len
./type.go:37:6: undefined: Map_new
./type.go:41:2: undefined: Map_Insert
./type.go:44:2: undefined: Map_Insert
./type.go:50:9: undefined: Tuple2