struct: fc=2 fn=(a,b) ft0=i64
enum: fc=3 fn=(X,Y,Z)
postuple: fc=2 ft=(i64,bool) fn0=[]
namtuple: fc=2 fn=(a,b)
array: fc=4 ft0=i64 fn0=[]
vector: fc=4 ft0=f32 fn0=[]