How complete is Hat?

Key:
- = no support
+ = partial support
* = full support

Haskell'98
vs. Hat Actual Planned
Mar
2000 Sept
2000 May
2001 Jan
2002

Language constructs
modules * * * *
lambda abstractions * * * *
pattern matches * * * *
guards * * * *
if-then-else * * * *
case expr of * * * *
list comprehensions + + + *
monadic do + + + *
infix operators * * * *
numeric literals + * * *
numeric sequences + + * *
n+k patterns - - - *
Basic types
Bool * * * *
Char * * * *
List * * * *
Tuples * * * *
Int * * * *
Integer - * * *
Float - * * *
Double - * * *
Rational - * * *
User types
data types * * * *
type synonyms + + * *
newtypes - * * *
named fields - - + *
type classes * * * *
derived instances - * * *
strict types - - + *

Haskell'98
vs. Hat Actual Planned
Mar
2000 Sept
2000 May
2001 Sept
2001

Input/output
single I/O streams * * * *
file handling - - + *
Libraries
Prelude + * * *
Ratio - * * *
Complex - * * *
Numeric - + * *
Ix - * * *
Array - - * *
List + * * *
Maybe + * * *
Char + * * *
Monad - * * *
IO - + * *
Directory - - * *
System - - * *
Time - - - *
Locale - - - *
CPUTime - - * *
Random - - * *
Platform Portability
machine and O/S * * * *
other Haskell systems - - - *
Non-Haskell'98 Extensions
primitive FFI - * * *
IOExtras library - - * *
multi-parameter TCs - - - -
existentials - - - -
concurrency - - - -
parallelism - - - -