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emacs and scheme talk to each other
Home Page: http://www.nongnu.org/geiser/
License: Other
This project forked from onixie/geiser
emacs and scheme talk to each other
Home Page: http://www.nongnu.org/geiser/
License: Other
* Overview Geiser is a generic Emacs/Scheme interaction mode, featuring an enhanced REPL and a set of minor modes improving Emacs' basic scheme major mode. The main functionalities provided are: - Evaluation of forms in the namespace of the current module. - Macro expansion. - File/module loading. - Namespace-aware identifier completion (including local bindings, names visible in the current module, and module names). - Autodoc: the echo area shows information about the signature of the procedure/macro around point automatically. - Jump to definition of identifier at point. - Access to documentation (including docstrings when the implementation provides it). - Listings of identifiers exported by a given module. - Listings of callers/callees of procedures. - Rudimentary support for debugging (list of evaluation/compilation error in an Emacs' compilation-mode buffer). - Support for inline images in schemes, such as Racket, that treat them as first order values. NOTE: if you're not in a hurry, Geiser's website (http://www.nongnu.org/geiser/) contains a nicer manual, also included in Geiser tarballs as a texinfo file (doc/geiser.info). * Requirements Geiser needs Emacs 23.2 or better, and at least one of the supported scheme implementations: - Guile 2.0 or better. - PLT Racket 5.3 or better. * Installation The easiest way is to use ELPA/Marmalade, and just type `M-x install-package RET geiser` inside emacs. Geiser can be used either directly from its uninstalled source tree or byte-compiled and installed after perfoming the standard configure/make/make install dance. See the INSTALL file for more details. * Basic configuration The loading invocations above install all supported Scheme implementations. You can list explicitly the ones that you want by setting the variable `geiser-impl-installed-implementations' *before* loading geiser.el. For instance: (setq geiser-impl-installed-implementations '(racket guile)) On opening a scheme file, Geiser will try to guess its Scheme, defaulting to the first in the list. Use `C-c C-s' to select the implementation by hand (on a per file basis). Check the geiser customization group for some options with: M-x customize-group RET geiser RET In particular, customize `geiser-<impl>-binary', which should point to an executable in your path. To start a REPL, M-x geiser. ** Completion with company-mode Geiser offers identifier and module name completion, bound to M-TAB and M-` respectively. Only names visible in the current module are offered. While that is cool and all, things are even better: if you have company-mode (http://company-mode.github.io/) installed, Geiser's completion will use it. Just require company-mode and, from then on, any new scheme buffer or REPL will use it. * Quick key reference ** In Scheme buffers: |-------------+-------------------------------------------------| | C-c C-z | Switch to REPL | | C-c C-a | Switch to REPL and current module | | C-c C-s | Specify Scheme implementation for buffer | |-------------+-------------------------------------------------| | M-. | Go to definition of identifier at point | | M-, | Go back to where M-. was last invoked | | C-c C-e m | Ask for a module and open its file | | C-c C-e C-l | Add a given directory to Scheme's load path | | C-c C-e [ | Toggle between () and [] for current form | |-------------+-------------------------------------------------| | C-M-x | Eval definition around point | | C-c M-e | Eval definition around point and switch to REPL | | C-x C-e | Eval sexp before point | | C-c C-r | Eval region | | C-c M-r | Eval region and switch to REPL | | C-c C-b | Eval buffer | | C-c M-b | Eval buffer and switch to REPL | |-------------+-------------------------------------------------| | C-c C-m x | Macro-expand definition around point | | C-c C-m e | Macro-expand sexp before point | | C-c C-m r | Marcro-expand region | |-------------+-------------------------------------------------| | C-c C-k | Compile and load current file | |-------------+-------------------------------------------------| | C-c C-d d | See documentation for identifier at point | | C-c C-d s | See short documentation for identifier at point | | C-c C-d i | Look up manual for identifier at point | | C-c C-d m | See a list of a module's exported identifiers | | C-c C-d a | Toggle autodoc mode | |-------------+-------------------------------------------------| | C-c < | Show callers of procedure at point | | C-c > | Show callees of procedure at point | |-------------+-------------------------------------------------| | M-TAB | Complete identifier at point | | M-`, C-. | Complete module name at point | | TAB | Complete identifier at point or indent | | | (If `geiser-mode-smart-tab-p' is t) | |-------------+-------------------------------------------------| ** In the REPL |-------------+----------------------------------------------------| | C-c C-z | Start Scheme REPL, or jump to previous buffer | | C-c M-o | Clear scheme output | | C-c C-q | Kill Scheme process | | C-c C-k | Nuke REPL: use it if the REPL becomes unresponsive | |-------------+----------------------------------------------------| | M-. | Edit identifier at point | | TAB, M-TAB | Complete identifier at point | | M-`, C-. | Complete module name at point | | M-p, M-n | Prompt history, matching current prefix | |-------------+----------------------------------------------------| | C-c C-m | Set current module | | C-c C-i | Import module into current namespace | | C-c C-r | Add a given directory to scheme's load path | |-------------+----------------------------------------------------| | C-c C-d C-d | See documentation for symbol at point | | C-c C-d C-m | See documentation for module | | C-c C-d C-a | Toggle autodoc mode | |-------------+----------------------------------------------------| ** In the documentation browser: |----------+----------------------------------------------| | f | Next page | | b | Previous page | |----------+----------------------------------------------| | TAB, n | Next link | | S-TAB, p | Previous link | | N | Next section | | P | Previous section | |----------+----------------------------------------------| | k | Kill current page and go to previous or next | | g, r | Refresh page | | c | Clear browsing history | |----------+----------------------------------------------| | ., M-. | Edit identifier at point | | z | Switch to REPL | |----------+----------------------------------------------| | q | Bury buffer | |----------+----------------------------------------------| ** In backtrace (evaluation/compile result) buffers: - M-g n, M-g p, C-x ` for error navigation. - q to bury buffer.
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