help.txt

Some stuff to try:
TAB        Haskell-indent-cycle:
           Cycle through possible indentings for this line.

C-c C-=    Haskell-indent-insert-equal:
           Insert an equal-sign lined up with others above it. 

C-c C-|    Haskell-indent-insert-guard:
           Insert a guard lined up with others.

C-c C-o    Haskell-indent-insert-otherwise:
           Insert an ``otherwise'' line in a guarded command.

C-c C-w    Haskell-indent-insert-where:
           Insert a where with the proper indentation.

C-c C-.    Haskell-indent-align-guards-and-rhs:
           Properly indent the entire selected region. (Nothing happens
           if you don't first select a region.)

:               Repeate last command
:load    :l     Load a haskell file
:relode  :r     Reload a haskell file
:type    :t     Give type of expression
:info    :i     Give info on name
:browse  :b     Give info on definitions if Module
:quit    :q     Quit the system
:help    :h     Give complete list of GHCI commands
:!              Perform an operating system command
:edit           Edit the given file in
:add     :a     Add module


Haskell
 C-c C-l     haskell-process-load-or-reload
 C-c C-t     haskell-process-do-type
 C-c C-i     haskell-process-do-info
 M-.         haskell-mode-jump-to-def-or-tag
 C-c C-k     haskell-interactive-mode-clear
 C-c C-c     haskell-process-cabal-build
 C-c C-x     haskell-process-cabal
 C-c C-b     haskell-interactive-switch)
 C-c C-z     haskell-interactive-switch)
 M-n         haskell-goto-next-error
 M-p         haskell-goto-prev-error

Haskell Mode
 C-c C-.     haskell-mode-format-imports
 C-c C-l     haskell-mode-enable-process-minor-mode
 C-c C-b     haskell-mode-enable-process-minor-mode
 C-c C-v     haskell-mode-enable-process-minor-mode
 C-c C-t     haskell-mode-enable-process-minor-mode
 C-c C-i     haskell-mode-enable-process-minor-mode

Haskell Interactive
 RET         haskell-interactive-mode-return
 SPC         haskell-interactive-mode-space
 C-j         haskell-interactive-mode-newline-indent
 C-a         haskell-interactive-mode-beginning
 <home>      haskell-interactive-mode-beginning
 C-c C-k     haskell-interactive-mode-clear
 C-c C-c     haskell-process-interrupt
 C-c C-f     next-error-follow-minor-mode
 C-c C-z     haskell-interactive-switch-back
 M-p         haskell-interactive-mode-history-previous
 M-n         haskell-interactive-mode-history-next
 C-c C-p     haskell-interactive-mode-prompt-previous
 C-c C-n     haskell-interactive-mode-prompt-next
 C-<up>      haskell-interactive-mode-history-previous
 C-<down>    haskell-interactive-mode-history-next
 TAB         haskell-interactive-mode-tab
 <C-S-backspace> haskell-interactive-mode-kill-whole-line

Haskell Debug
 g           haskell-debug/refresh
 s           haskell-debug/step
 t           haskell-debug/trace
 d           haskell-debug/delete
 b           haskell-debug/break-on-function
 a           haskell-debug/abandon
 c           haskell-debug/continue
 p           haskell-debug/previous
 n           haskell-debug/next
 RET         haskell-debug/select

Highlight uses mode
 TAB         highlight-uses-mode-next 
 S-TAB       highlight-uses-mode-prev 
 <backtab>   highlight-uses-mode-prev 
 RET         highlight-uses-mode-stop-here 
 C-g         highlight-uses-mode 

Cabal mode
 C-c C-s     haskell-cabal-subsection-arrange-lines
 C-M-n       haskell-cabal-next-section
 C-M-p       haskell-cabal-previous-section
 M-n         haskell-cabal-next-subsection
 M-p         haskell-cabal-previous-subsection
 C-<down>    haskell-cabal-next-subsection
 C-<up>      haskell-cabal-previous-subsection
 C-c C-f     haskell-cabal-find-or-create-source-file
 M-g l       haskell-cabal-goto-library-section
 M-g e       haskell-cabal-goto-executable-section
 M-g b       haskell-cabal-goto-benchmark-section
 M-g t       haskell-cabal-goto-test-suite-section


Ghc-mod
M-C-i        ghc-completion-key  'ghc-complete)
Completes a name of keyword, module, class, function, types, language extensions, GHC flags, etc.

M-/
Completes a name of local symbol.

C-u M-t      ghc-insert-key      'ghc-insert-template-or-signature) 
Inserts template. In the beginning of a buffer, "module Foo where" is inserted. On the function without signature, inferred type is inserted. On a symbol "foo" without definition, "foo = undefined" is inserted or a proper module is imported.

C-u M-t
Inserts a hole in this case. On a variable, the case is split. When checking with hlint, original code is replaced with hlint's suggestion if possible.

M-C-d
Browses the local document with your browser. On a module import line, the document of the module is browsed. On a function or type, its document is browsed.

C-u M-C-d    ghc-document-key    'ghc-browse-document)
Browses the Hackage document of the module with your browser.

M-C-m    ghc-import-key      'ghc-import-module)
Loads information of symbols for modules in the current buffer. If you add a new line to import a module, type this. The idle timer executes this command anyway.

C-c C-h  ghc-hoogle-key      'haskell-hoogle)
Query somthing at the cursor for hoogle.

C-x C-s
Saves the buffer if necessary and runs syntax check.

C-c C-c  ghc-toggle-key      'ghc-toggle-check-command)
Toggle GHC and Hlint for syntax check. GHC is used for initial time.

M-n      ghc-next-key        'ghc-goto-next-error)
Goes to the next warning or error.

M-p      ghc-previous-key    'ghc-goto-prev-error)
Goes to the previous warning or error.

M-?      ghc-help-key        'ghc-display-errors)
Displays the warning/error message in the current line.

C-c C-i  ghc-info-key        'ghc-show-info)
Displays the info of this expression in another window.

C-c C-t  ghc-type-key        'ghc-show-type)
Displays the type of this expression in the minibuffer. Type C-c C-t multiple time to enlarge the expression.

C-c C-a  ghc-auto-key        'ghc-auto)
Selects one of possible cases.

C-c C-f  ghc-refine-key      'ghc-refine)
Replaces a hole with user-typed functions followed by holes.

C-c C-e  ghc-expand-key      'ghc-expand-th
Displays the expanded Template Haskell.

C-c C-m  ghc-module-key      'ghc-insert-module)
Insert "import Module" for the function at the cursor.

M-s      ghc-sort-key        'ghc-sort-lines)
Sort and merge import statements in the region.

C-c C-j  ghc-jump-key        'ghc-jump-file)
In the beginning of the buffer, errors of other files are displayed.
             Typing C-c C-j on the errors jumps to the fist file of the error sources.

C-c C-k  ghc-kill-key        'ghc-kill-process)
Kill the ghc-modi subprocess for this project. If you install dependency packages, this command should be executed to reflect that change.

C-c <    ghc-shallower-key   'ghc-make-indent-shallower)
Make the indentation of the region shallower.

C-c >    ghc-deeper-key      'ghc-make-indent-deeper)
Make the indentation of the region deeper.

 C-c C-s  ghc-case-split-key  'ghc-case-split)
 C-c M-p   ghc-prev-hole-key   'ghc-goto-prev-hole)
 C-c M-n  ghc-next-hole-key   'ghc-goto-next-hole)