I'm often annoyed by foo <- readFile printing the entire file contents
on my console. I know there is this flag to turn it off but I can never
remember what the flag is called. I have to look it up every time or
suffer pages of file content on my console.
finding that flag (and other topic-related flags) might become
easier in future. there is one patch for head that would allow
to query directly for interactive mode (or other topical) flags:
$ /cygdrive/c/fptools/ghc/compiler/stage2/ghc-inplace --flags Interactive:
Interactive-mode options
Flag | Description | Static/Dynamic | Reverse
-ignore-dot-ghci | Disable reading of .ghci files | static | -
-read-dot-ghci | Enable reading of .ghci files | static | -
-fbreak-on-exception | Break on any exception thrown | dynamic |
-fno-break-on-exception
-fbreak-on-error | Break on uncaught exceptions and errors | dynamic |
-fno-break-on-error
-fprint-evld-with-show | Enable usage of Show instances in :print | dynamic
| -fno-print-evld-with-show
-fno-print-bind-result | Turn off printing of binding results in GHCi |
dynamic | -
unfortunately, Simon M is violently opposed to it, so it is
unlikely to go in. see
http://hackage.haskell.org/trac/ghc/ticket/1226
his idea is that the man-page or web-page are good enough
to find such things. if you don't agree, perhaps you'd like to
add a comment to that ticket?-) otherwise, i'll just keep that
patch in my own repo.
there is another patch that would list (and thereby remind
you of) ghci-related dynamic flags whenever you do :set
to list ghci options:
Prelude> :set
options currently set: none.
GHCi-specific dynamic flag settings:
-fno-print-explicit-foralls
-fprint-bind-result
-fno-break-on-exception
-fno-break-on-error
-fno-print-evld-with-show
other dynamic, non-language, flag settings:
-fno-warn-dodgy-imports
-fwarn-duplicate-exports
..
my current understanding is that this one will go in at
some point, now that the release is out of the way. so,
for ghci-related dynamic flags at least, you'd see which
ones there are, and what they are set to.
claus
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