How complete is Hat?

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

Haskell'98
vs. Hat
ActualPlanned
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
ActualPlanned
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----