3 Geiser is a generic Emacs/Scheme interaction mode, featuring an
4 enhanced REPL and a set of minor modes improving Emacs' basic scheme
5 major mode. The main functionalities provided are:
7 - Evaluation of forms in the namespace of the current module.
10 - Namespace-aware identifier completion (including local bindings,
11 names visible in the current module, and module names).
12 - Autodoc: the echo area shows information about the signature of
13 the procedure/macro around point automatically.
14 - Jump to definition of identifier at point.
15 - Access to documentation (including docstrings when the
16 implementation provides it).
17 - Listings of identifiers exported by a given module.
18 - Listings of callers/callees of procedures.
19 - Rudimentary support for debugging (list of
20 evaluation/compilation error in an Emacs' compilation-mode
22 - Support for inline images in schemes, such as Racket, that treat
23 them as first order values.
25 NOTE: if you're not in a hurry, Geiser's website
26 (http://www.nongnu.org/geiser/) contains a nicer manual, also
27 included in Geiser tarballs as a texinfo file (doc/geiser.info).
31 Geiser needs Emacs 23.2 or better, and at least one of the
32 supported scheme implementations:
33 - Guile 2.0 or better.
34 - PLT Racket 5.3 or better.
38 The easiest way is to use ELPA/Marmalade, and just type
39 `M-x install-package RET geiser` inside emacs.
41 Geiser can be used either directly from its uninstalled source tree
42 or byte-compiled and installed after perfoming the standard
43 configure/make/make install dance. See the INSTALL file for more details.
47 The loading invocations above install all supported Scheme
48 implementations. You can list explicitly the ones that you want by
49 setting the variable `geiser-impl-installed-implementations' *before*
50 loading geiser.el. For instance:
52 (setq geiser-impl-installed-implementations '(racket guile))
54 On opening a scheme file, Geiser will try to guess its Scheme,
55 defaulting to the first in the list. Use `C-c C-s' to select the
56 implementation by hand (on a per file basis).
58 Check the geiser customization group for some options with:
60 M-x customize-group RET geiser RET
62 In particular, customize `geiser-<impl>-binary', which should point
63 to an executable in your path.
65 To start a REPL, M-x geiser.
67 ** Completion with company-mode
69 Geiser offers identifier and module name completion, bound to
70 M-TAB and M-` respectively. Only names visible in the current
73 While that is cool and all, things are even better: if you have
74 company-mode (http://nschum.de/src/emacs/company-mode/) installed,
75 Geiser's completion will use it. Just require company-mode and,
76 from then on, any new scheme buffer or REPL will use it. If you
77 didn't know about Nikolaj Schumacher's awesome mode, check this
78 screencast: http://goo.gl/yxLQ.
84 |-------------+-------------------------------------------------|
85 | C-c C-z | Switch to REPL |
86 | C-c C-a | Switch to REPL and current module |
87 | C-c C-s | Specify Scheme implementation for buffer |
88 |-------------+-------------------------------------------------|
89 | M-. | Go to definition of identifier at point |
90 | M-, | Go back to where M-. was last invoked |
91 | C-c C-e m | Ask for a module and open its file |
92 | C-c C-e C-l | Add a given directory to Scheme's load path |
93 | C-c C-e [ | Toggle between () and [] for current form |
94 |-------------+-------------------------------------------------|
95 | C-M-x | Eval definition around point |
96 | C-c M-e | Eval definition around point and switch to REPL |
97 | C-x C-e | Eval sexp before point |
98 | C-c C-r | Eval region |
99 | C-c M-r | Eval region and switch to REPL |
100 |-------------+-------------------------------------------------|
101 | C-c C-m x | Macro-expand definition around point |
102 | C-c C-m e | Macro-expand sexp before point |
103 | C-c C-m r | Marcro-expand region |
104 |-------------+-------------------------------------------------|
105 | C-c C-k | Compile and load current file |
106 |-------------+-------------------------------------------------|
107 | C-c C-d d | See documentation for identifier at point |
108 | C-c C-d s | See short documentation for identifier at point |
109 | C-c C-d i | Look up manual for identifier at point |
110 | C-c C-d m | See a list of a module's exported identifiers |
111 | C-c C-d a | Toggle autodoc mode |
112 |-------------+-------------------------------------------------|
113 | C-c < | Show callers of procedure at point |
114 | C-c > | Show callees of procedure at point |
115 |-------------+-------------------------------------------------|
116 | M-TAB | Complete identifier at point |
117 | M-`, C-. | Complete module name at point |
118 | TAB | Complete identifier at point or indent |
119 | | (If `geiser-mode-smart-tab-p' is t) |
120 |-------------+-------------------------------------------------|
124 |-------------+----------------------------------------------------|
125 | C-c C-z | Start Scheme REPL, or jump to previous buffer |
126 | C-c M-o | Clear scheme output |
127 | C-c C-q | Kill Scheme process |
128 | C-c C-k | Nuke REPL: use it if the REPL becomes unresponsive |
129 |-------------+----------------------------------------------------|
130 | M-. | Edit identifier at point |
131 | TAB, M-TAB | Complete identifier at point |
132 | M-`, C-. | Complete module name at point |
133 | M-p, M-n | Prompt history, matching current prefix |
134 |-------------+----------------------------------------------------|
135 | C-c C-m | Set current module |
136 | C-c C-i | Import module into current namespace |
137 | C-c C-r | Add a given directory to scheme's load path |
138 |-------------+----------------------------------------------------|
139 | C-c C-d C-d | See documentation for symbol at point |
140 | C-c C-d C-m | See documentation for module |
141 | C-c C-d C-a | Toggle autodoc mode |
142 |-------------+----------------------------------------------------|
144 ** In the documentation browser:
146 |----------+----------------------------------------------|
148 | b | Previous page |
149 |----------+----------------------------------------------|
150 | TAB, n | Next link |
151 | S-TAB, p | Previous link |
153 | P | Previous section |
154 |----------+----------------------------------------------|
155 | k | Kill current page and go to previous or next |
156 | g, r | Refresh page |
157 | c | Clear browsing history |
158 |----------+----------------------------------------------|
159 | ., M-. | Edit identifier at point |
160 | z | Switch to REPL |
161 |----------+----------------------------------------------|
163 |----------+----------------------------------------------|
165 ** In backtrace (evaluation/compile result) buffers:
167 - M-g n, M-g p, C-x ` for error navigation.