On Mar 29, 2006, at 4:28 PM, Paul Johnson wrote:
...
2: Sun and Microsoft bring out support for STM in Java and C#
respectively. The trade press editorialize on this wonderful new
technology. Haskell may get a mention as the original prototype,
"but now its ready for mainstream use".
I had to chuckle at this one in particular, since the implementation
of transactions in Haskell was based on experiences with prototype
software TM in Java and C#! In truth, Haskell adds a few things to
the mix that make STM dramatically better. Most important are STM
and STRef---it's no longer possible to accidentally commingle
transactional and non-transactional access to the same storage, or to
do I/O in the middle of a transaction by mistake. Without Haskell's
support for monadic typing this would have required wholesale
reworking of the language implementation. That's the situation most
other languages find themselves in.
As long as we keep discovering new techniques that fit within the
monadic box, Haskell will remain ahead of mainstream languages here.
-Jan-Willem Maessen
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