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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/design/assistant/blog/day_268__core_monad_change.mdwn | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/design/assistant/blog/day_268__core_monad_change.mdwn b/doc/design/assistant/blog/day_268__core_monad_change.mdwn new file mode 100644 index 000000000..2704bb090 --- /dev/null +++ b/doc/design/assistant/blog/day_268__core_monad_change.mdwn @@ -0,0 +1,9 @@ +Today I had to change the implementation of the Annex monad. The old one +turned out to be buggy around exception handling -- changes to state +recorded by code that ran in an exception handler were discarded when it +threw an exception. Changed from a StateT monad to a ReaderT with +a MVar. Really deep-level change, but it went off without a +hitch! + +Other than that it was a bug catch up day. Almost entirely caught up once +more. |