880782660a
ob-clojure.el: Reword docstring for ob-clojure-eval-with-cider
...
* lisp/ob-clojure.el (ob-clojure-eval-with-cider): Mention in the
docstring that the Babel params argument is not used anymore.
2023-03-23 13:25:15 +01:00
cd2355a204
ob-clojure.el: Fix compiler warning
...
* lisp/ob-clojure.el (ob-clojure-eval-with-cider): Silence compiler
warning about unused argument 'params'.
2023-03-19 21:39:07 +01:00
6efb073463
ob-clojure.el: Fix results output, support clojure-cli
...
* lisp/ob-clojure.el (org-babel-clojure-backend): Add support for
clojure-cli.
* lisp/ob-clojure.el (org-babel-clojurescript-backend): Move nbb to
clojurescript.
* lisp/ob-clojure.el (org-babel-expand-body:clojure)
* lisp/ob-clojure.el (ob-clojure-eval-with-cider): Return only the
last expression when :results is not set or value, and return only
stdout when :results is set to output.
* lisp/ob-clojure.el (ob-clojure-eval-with-cmd): Rename function as
it is not only for babashka.
* lisp/ob-clojure.el (org-babel-execute:clojure): Differentiate
between Clojure and ClojureScript source blocks.
The problem was that the ob-clojure results where not correctly
taking the results parameter into account.
E.g. with the cider backend, you would get all printed or returned
values for each line in your block:
(def small-map {:a 2 :b 4 :c 8})
{:some :map}
(prn :xx)
(:b small-map)
| #'user/small-map |
| {:some :map} |
| 4 |
or for babashka you would only get the printed values but not the
last return value:
(def small-map {:a 2 :b 4 :c 8})
{:some :map}
(prn :xx)
(:b small-map)
: :xx
Now when you specify :results value, the result is only the last
returned value, and with :results output you get all values
printed to stdout.
So the examples above would all result in the same:
(def small-map {:a 2 :b 4 :c 8})
{:some :map}
(prn :xx)
(:b small-map)
: 4
2023-03-16 11:25:41 +01:00
fe92a3cedb
Provide a uniform way to inform users about missing third-party packages
...
* lisp/org-macs.el (org-require-package): New macro trying to load a
library and displaying custom error message or warning on failure.
The actual package (not library) name can be provided as optional
argument.
* lisp/ob-R.el (org-babel-R-initiate-session):
* lisp/ob-clojure.el (ob-clojure-eval-with-inf-clojure):
(ob-clojure-eval-with-cider):
(ob-clojure-eval-with-slime):
* lisp/ob-forth.el (org-babel-forth-session-execute):
* lisp/ob-gnuplot.el (org-babel-execute:gnuplot):
(org-babel-gnuplot-initiate-session):
* lisp/ob-haskell.el (org-babel-interpret-haskell):
(org-babel-haskell-initiate-session):
* lisp/ob-js.el (org-babel-execute:js):
(org-babel-js-initiate-session):
* lisp/ob-julia.el (org-babel-julia-initiate-session):
* lisp/ob-lisp.el (org-babel-execute:lisp):
* lisp/ob-ocaml.el (org-babel-prep-session:ocaml):
* lisp/ob-octave.el (org-babel-octave-initiate-session):
* lisp/ob-processing.el (org-babel-processing-view-sketch):
* lisp/ob-ruby.el (org-babel-execute:ruby):
(org-babel-ruby-initiate-session):
* lisp/ol-bbdb.el (org-bbdb-open):
(org-bbdb-complete-link):
(org-bbdb-anniv-export-ical):
* lisp/org-agenda.el:
* lisp/org-plot.el (org-plot/gnuplot):
* lisp/org.el:
* lisp/ox-ascii.el (org-ascii-table):
* lisp/ox-html.el (org-html-htmlize-generate-css):
* lisp/ox-org.el: Use the new macro.
* lisp/oc-csl.el: Add FIXME. oc-csl uses a custom function doing
similar job.
* lisp/ob-js.el (org-babel-js-initiate-session): Add FIXME noting that
the third-party package is outdated.
2023-02-17 17:09:23 +03:00
e0815d7545
Backport commit cae528457 from Emacs
...
; Add 2023 to copyright years.
cae528457cb862dc886a34240c9d4c73035b6659
Eli Zaretskii
Sun Jan 1 05:31:12 2023 -0500
2023-01-01 12:44:47 -05:00
c8b0a0d1b6
Backport commit a15cd5504 from Emacs
...
; Don't quote nil in comments
a15cd55044c6bb4d4e9f9aec23b8b5b9cbcb38ac
Stefan Kangas
Thu Dec 15 02:35:00 2022 +0100
2022-12-17 17:01:59 -05:00
9b856c273f
Backport commit 4b2f5425d from Emacs
...
* lisp/ob-clojure.el
(ob-clojure-babashka-command, ob-clojure-nbb-command):
Account for the possibility of nil (commands absent).
* lisp/org.el (org-safe-remote-resources):
* lisp/ox-md.el (org-md-toplevel-hlevel):
Fix incorrect or invalid types.
Fix types in various defcustom declarations
4b2f5425d7af1a6f992ad8ce0a4452a2e778815a
Mattias Engdegård
Thu Dec 1 13:03:19 2022 +0100
[km] The natnum change will be adjusted in an upcoming commit because
natnum not available until Emacs 28.
2022-12-01 17:25:58 -05:00
5a10517d02
Add missing :package-version tags in changed `defcustom'
...
* lisp/ob-clojure.el (ob-clojure-babashka-command):
(ob-clojure-nbb-command):
* lisp/ob-exp.el (org-babel-exp-code-template):
* lisp/ob-latex.el (org-babel-latex-pdf-svg-process):
* lisp/org-agenda.el (org-agenda-show-outline-path):
* lisp/org-capture.el (org-capture-templates):
* lisp/org-clock.el (org-clocktable-defaults):
* lisp/org-persist.el (org-persist-directory):
(org-persist-remote-files):
(org-persist-default-expiry):
* lisp/org-refile.el (org-refile-use-outline-path):
* lisp/org-src.el (org-src-lang-modes):
* lisp/org.el (org-resource-download-policy):
(org-safe-remote-resources):
(org-time-stamp-custom-formats):
(org-property-separators):
(org-preview-latex-process-alist):
(org-structure-template-alist):
* lisp/ox-latex.el (org-latex-inline-image-rules):
(org-latex-src-block-backend):
(org-latex-engraved-options):
(org-latex-engraved-theme):
* lisp/ox-md.el (org-md-toplevel-hlevel):
* lisp/ox-texinfo.el (org-texinfo-with-latex): Add :package-version
keywords to the new custom options, and those with the value or
meaning changed.
2022-11-13 15:29:15 +08:00
bd68ece99c
ob-clojure.el: Auto detect backend
...
* lisp/ob-clojure.el (org-babel-clojure-backend): Set the backend
to an available cli program or elisp package.
2022-10-30 12:18:58 +01:00
a51cf1cc6b
ob-clojure.el: Fix bug with inline comments
...
* lisp/ob-clojure.el (ob-clojure-eval-with-cider): Filter out
nil values from cider evaluation.
2022-10-29 22:22:12 +02:00
0e175f11fd
lisp/ob-clojure.el: Fix header argument :var binding
...
* lisp/ob-clojure.el (org-babel-expand-body:clojure): Always quote
the variables passed from org-mode in Clojure let binding.
When a variable is a table or list, it's value is "(..data..)"
and without quotes, Clojure would try to execute the first
value as a function.
2022-10-28 11:50:03 +02:00
efcfaca72d
lisp/ob-clojure.el: Update headers
2022-10-28 10:48:16 +02:00
601ce688d5
lisp/ob-clojure.el: Fix :backend override not work with `org-babel-clojure-backend'
...
* lisp/ob-clojure.el (org-babel-expand-body:clojure): When The source
block specified header argument :backend, the global option
`org-babel-clojure-backend' value is default 'cider, the
`cider-buffer-ns` is not void error.
2022-10-13 10:51:19 +08:00
4d07df718b
ob-clojure.el: Add a :backend header arg to clojure code blocks
...
* ob-clojure.el (org-babel-header-args:clojure,
org-babel-execute:clojure): Add a :backend header arg that can
override the configured `org-babel-clojure-backend'.
TINYCHANGE
2022-10-11 10:49:56 +08:00
c536832308
lisp/ob-clojure.el: Add Daniel Kraus as maintainer
2022-09-27 21:36:51 +02:00
764642f55b
ob-clojure.el: Add support for babashka and nbb backend
...
* lisp/ob-clojure.el: Add support for babashka and nbb backend.
2022-09-25 05:07:28 +02:00
e81a094383
Assert all the Org files to load the same Org version
...
* lisp/org-compat.el (org-assert-version): New macro comparing Org
version at compile time and laod time.
Add `org-assert-version' call to all files:
* lisp/org-macs.el:
* lisp/org-crypt.el:
* lisp/org-ctags.el:
* lisp/org-cycle.el:
* lisp/org-datetree.el:
* lisp/org-duration.el:
* lisp/org-element.el (avl-tree):
* lisp/org-entities.el:
* lisp/org-faces.el:
* lisp/org-feed.el:
* lisp/org-fold-core.el:
* lisp/org-fold.el:
* lisp/org-footnote.el:
* lisp/org-goto.el:
* lisp/org-habit.el:
* lisp/org-id.el:
* lisp/org-indent.el:
* lisp/org-inlinetask.el:
* lisp/org-keys.el:
* lisp/org-lint.el:
* lisp/org-list.el:
* lisp/org-macro.el:
* lisp/org-mobile.el:
* lisp/org-mouse.el:
* lisp/org-num.el:
* lisp/org-pcomplete.el:
* lisp/org-persist.el:
* lisp/org-plot.el:
* lisp/org-protocol.el:
* lisp/org-refile.el:
* lisp/org-src.el:
* lisp/org-table.el:
* lisp/org-tempo.el:
* lisp/org-timer.el:
* lisp/org.el:
* lisp/ox-ascii.el:
* lisp/ox-beamer.el:
* lisp/ox-html.el:
* lisp/ox-icalendar.el:
* lisp/ox-koma-letter.el:
* lisp/ox-latex.el:
* lisp/ox-man.el:
* lisp/ox-md.el:
* lisp/ox-odt.el:
* lisp/ox-org.el:
* lisp/ox-publish.el:
* lisp/ox-texinfo.el:
* lisp/ox.el:
2022-09-04 12:24:55 +08:00
13d97ee18c
Prefer "website" to "homepage"
...
Emacs now advises using "website" (instead of "homepage") and
consequently to use the "URL" comment header instead of "Homepage".
* README:
* README_ELPA:
* doc/org-guide.org (Creating Footnotes):
* doc/org-manual.org (Creating Footnotes):
* etc/styles/README (URL): Prefer "website" to "homepage".
* lisp/*.el:
* mk/org-fixup.el: Replace the "Homepage" header comment with "URL".
2022-06-26 10:10:48 +08:00
5a229cbc44
Update copyright year to 2022
2022-01-01 15:17:08 -05:00
2e1c984153
Prefer HTTPS to HTTP in most links
2021-03-21 15:21:22 -04:00
291993888d
Merge branch 'maint'
2021-01-01 15:02:10 -05:00
99eafe3787
Update copyright year to 2021
2021-01-01 14:59:01 -05:00
eecc491f1c
lisp/ob-clojure.el: Add bzg@gnu.org as the maintainer
2020-10-26 08:55:32 +01:00
10cd894b23
ob-clojure.el: More minor refinements
...
* lisp/ob-clojure.el (org-babel-expand-body:clojure): Inline
namespace setting.
(org-babel-clojure-cider-current-ns): Delete.
(ob-clojure-inf-clojure-filter-out): New variable.
(ob-clojure-inf-clojure-output): Use it.
(ob-clojure-eval-with-inf-clojure): Update the filter variable
depending on the current namespace.
2020-02-17 02:38:02 +01:00
409bd498d1
ob-clojure.el: Enhancements and refactoring, removed session code
...
* lisp/ob-clojure.el (ob-clojure-inf-clojure-output): Filter
out spurious strings.
(ob-clojure-with-temp-expanded): New macro.
(ob-clojure-string-or-list, ob-clojure-eval-with-inf-clojure)
(ob-clojure-eval-with-cider, ob-clojure-eval-with-slime): New
functions.
(org-babel-execute:clojure): Use new functions.
(org-babel-execute:clojurescript): Fix docstring.
(org-babel-edit-prep:clojure)
(org-babel-clojure-initiate-session)
(org-babel-prep-session:clojure)
(org-babel-clojure-var-to-clojure)
(org-babel-variable-assignments:clojure): Delete function.
2020-02-16 23:46:49 +01:00
e2203692b7
ob-clojure.el: Support using inf-clojure.el
...
* lisp/ob-clojure.el (org-babel-clojure-backend): Allow to use
inf-clojure.el and set to nil by default.
(ob-clojure-inf-clojure-output): New function.
(org-babel-execute:clojure): Support using inf-clojure.el.
Remove the :show-process parameter.
(org-babel-execute:clojurescript)
(org-babel-edit-prep:clojure): Fix docstrings.
(org-babel-clojure-initiate-session): Make the session
parameter mandatory. Initiate a cider session if needed.
2020-02-16 11:16:00 +01:00
e361c64043
ob-clojure: Drop recently added if-let* for compatibility
...
* lisp/ob-clojure.el (org-babel-edit-prep:clojure): Rewrite without
if-let*, which isn't available until Emacs 26.
2020-02-14 21:09:12 -05:00
003a7fc0b4
* lisp/ob-clojure.el: Add more ClojureScript src block support.
...
* lisp/ob-clojure.el: Add ClojureScript src block tangle extension and
header arguments support.
* lisp/ob-clojure.el (org-babel-edit-prep:clojure): Auto inject src
block :ns header argument into editing temporary src block buffer local.
TINYCHANGE
2020-02-13 16:56:02 +01:00
d37fc58150
* lisp/ob-clojure.el: Support for clojurescript src block execution.
...
* lisp/ob-clojure.el (org-babel-execute:clojurescript): New function to
Execute ClojureScript src block.
TINYCHANGE
2020-02-13 16:55:57 +01:00
b1f564b4b6
ob-clojure.el: Fix let binding expansion and comments removal
...
* lisp/ob-clojure.el (org-babel-expand-body:clojure): Remove
comment while expanding the body of the source block.
(org-babel-expand-body:clojure): Don't quote the value of src
block variables.
2020-02-12 11:24:07 +01:00
ff5fc050d3
Update copyright year to 2020
2020-01-01 13:38:46 -05:00
bcdb2b5568
ob-clojure: Don't tangle with auto prepend ns statement
...
* lisp/ob-clojure.el: (org-babel-expand-body:clojure,
org-babel-header-args:clojure): whether auto prepend Clojure (ns ..)
statement depend on whether have :ns header argument specified.
* testing/test-ob-clojure.el: Add a test.
2019-01-21 21:17:47 +01:00
7a22b8f93b
Merge branch 'maint'
2019-01-01 11:54:01 +01:00
f584d37a67
Update copyright year
2019-01-01 11:50:56 +01:00
2c5df17ed1
ob-clojure: Support new CIDER using sesman to manage sessions
...
* ob-clojure.el (org-babel-clojure-initiate-session): Improve ob-clojure
initialize session way to support CIDER new API.
* etc/ORG-NEWS: Add declare for new :session support feature.
2018-10-25 10:33:16 +02:00
4456dc8809
ob-clojure: Support `org-babel-initiate-session'
...
* ob-clojure.el (org-babel-clojure-initiate-session): Initialize session
for source block.
(org-babel-prep-session:clojure): Prepare Clojure session.
(org-babel-clojure-var-to-clojure): Convert header argument :var into
clojure variables definitions.
(org-babel-variable-assignments:clojure): Support assigning variables
when initializing a session.
2018-10-25 10:28:41 +02:00
17edaf8c14
"src block" -> "source block" in documentation and comments
...
* etc/ORG-NEWS (Maxima: new headers ~:prologue~ and ~:epilogue~):
(Texinfo exports inline source blocks as ~@code{}~):
(Default lexical evaluation of emacs-lisp source blocks):
* lisp/ob-clojure.el (org-babel-clojure-default-ns):
* lisp/ob-core.el (org-babel-named-src-block-regexp-for-name):
(org-babel-current-src-block-location):
(org-babel-mark-block):
(org-babel-insert-result):
* lisp/ob-emacs-lisp.el (org-babel-default-header-args:emacs-lisp):
* lisp/ob-exp.el (org-babel-exp-process-buffer):
* lisp/ob-lob.el (org-babel-lob-ingest):
* lisp/ob-ref.el:
* lisp/org-element.el (org-element-object-restrictions):
(org-element-src-block-parser):
(org-element-inline-src-block-parser):
* lisp/org-lint.el:
(org-lint--checkers):
* lisp/org-pcomplete.el (pcomplete/org-mode/block-option/src):
* lisp/org-src.el (org-edit-inline-src-code):
* lisp/org.el (org-ctrl-c-ctrl-c):
(org-in-src-block-p):
(org-fill-element):
* lisp/ox-html.el (org-html--textarea-block):
(org-html-format-code):
* lisp/ox-latex.el (org-latex-minted-options):
(org-latex-custom-lang-environments):
* lisp/ox-md.el:
* lisp/ox-odt.el (org-odt-format-code):
* lisp/ox.el (org-export-collect-listings):
* testing/lisp/test-ob-exp.el (ob-exp/src-block-with-affiliated-keyword):
* testing/lisp/test-ob.el (test-ob/preserve-results-indentation):
Correct "src block" occurrences when they do not specifically refer
to the element type `src-block'.
2018-09-20 11:23:49 +02:00
4afb7f747b
Update declare-function calls for functions that have moved.
...
In cases where functions have moved from org.el into org-macs.el, it
is often possible to replace declare-function by (require 'org-macs)
2018-05-10 01:04:12 +01:00
d7e12d1df7
* ob-clojure: Support :ns header argument
...
* lisp/ob-clojure.el (org-babel-clojure-default-ns): New variable.
(org-babel-clojure-cider-current-ns): New function.
(org-babel-expand-body:clojure):
(org-babel-execute:clojure): Support :ns header argument.
Remove optional parameter (cider-current-ns) to better handle
namespaces.
2018-04-14 18:21:55 +02:00
b289a65be7
Use https for links to orgmode.org
...
TINYCHANGE
2018-01-19 18:14:58 +01:00
3e1641ef0a
Update copyright years
2018-01-07 00:27:54 -05:00
ff0dcf52a5
Backport commit bc511a64f from Emacs
...
Prefer HTTPS to FTP and HTTP in documentation
bc511a64f6da9ab51acc7c8865e80c4a4cb655c2
Paul Eggert
Wed Sep 13 15:54:37 2017 -0700
2017-09-17 00:28:38 -04:00
7ed93eba5a
Fix incorrect argument call in ob-clojure.el
...
* lisp/ob-clojure.el (org-babel-execute:clojure): Use
`cider-current-ns' instead of `cider-current-session'.
org-babel-execute-clojure was calling nrepl-sync-request:eval and
nrepl-request:eval with the session ID as the 3rd argument when the
functions expected a clojure namespace.
TINYCHANGE
2017-03-07 09:09:28 +01:00
98d672de3d
Update "25.2" defcustom :version's that remain in master
...
* lisp/ob-clojure.el (org-babel-clojure-sync-nrepl-timeout):
* lisp/org-agenda.el (org-agenda-show-future-repeats):
(org-agenda-prefer-last-repeat):
* lisp/org-bibtex.el (org-bibtex-headline-format-function):
* lisp/ox-publish.el (org-publish-sitemap-sort-folders):
* lisp/ox.el (org-export-global-macros): Change :version from "25.2"
to "26.1".
As mentioned in 7c710f6f5
2017-01-26 00:15:11 -05:00
0d3683f2cd
Merge branch 'maint'
2017-01-05 20:23:58 -05:00
713f785017
Update copyright years
2017-01-05 20:19:37 -05:00
2c466ebff2
ob-clojure: Normalize :show-process syntax
...
* lisp/ob-clojure.el (org-babel-execute:clojure): :show-process
requires a non-nil (and non "no") value.
2016-11-19 07:39:05 +01:00
cd4186c5c3
ob-clojure: Small refactoring
...
* lisp/ob-clojure.el (org-babel-execute:clojure): Small refactoring.
2016-11-19 07:35:23 +01:00
56c0ce4a8d
ob-clojure: Add :show-process
...
* lisp/ob-clojure.el (org-babel-clojure-sync-nrepl-timeout): New variable.
(org-babel-execute:clojure): Implement :show-process. Better error
handling.
2016-11-19 00:30:39 +01:00
79650ffbbd
Use assq instead of assoc for :keywords
...
* lisp/ob-C.el (org-babel-C-execute):
* lisp/ob-J.el (org-babel-execute:J):
* lisp/ob-R.el (org-babel-edit-prep:R):
(org-babel-expand-body:R):
(org-babel-execute:R):
(org-babel-variable-assignments:R):
(org-babel-R-initiate-session):
* lisp/ob-abc.el (org-babel-execute:abc):
* lisp/ob-asymptote.el (org-babel-execute:asymptote):
* lisp/ob-awk.el (org-babel-execute:awk):
* lisp/ob-clojure.el (org-babel-expand-body:clojure):
(org-babel-execute:clojure):
* lisp/ob-core.el (org-babel-expand-body:generic):
(org-babel-load-in-session):
(org-babel-initiate-session):
(org-babel-open-src-block-result):
(org-babel-process-params):
(org-babel-insert-result):
(org-babel-expand-noweb-references):
* lisp/ob-ditaa.el (org-babel-execute:ditaa):
* lisp/ob-dot.el (org-babel-execute:dot):
* lisp/ob-ebnf.el (org-babel-execute:ebnf):
* lisp/ob-emacs-lisp.el (org-babel-expand-body:emacs-lisp):
(org-babel-execute:emacs-lisp):
* lisp/ob-exp.el (org-babel-exp-process-buffer):
(org-babel-exp-do-export):
(org-babel-exp-code):
* lisp/ob-forth.el (org-babel-execute:forth):
* lisp/ob-fortran.el (org-babel-execute:fortran):
* lisp/ob-gnuplot.el (org-babel-gnuplot-process-vars):
(org-babel-expand-body:gnuplot):
(org-babel-execute:gnuplot):
* lisp/ob-groovy.el (org-babel-execute:groovy):
* lisp/ob-haskell.el (org-babel-execute:haskell):
* lisp/ob-io.el (org-babel-execute:io):
* lisp/ob-java.el (org-babel-execute:java):
* lisp/ob-js.el (org-babel-execute:js):
* lisp/ob-latex.el (org-babel-execute:latex):
* lisp/ob-ledger.el (org-babel-execute:ledger):
* lisp/ob-lilypond.el (org-babel-lilypond-process-basic):
* lisp/ob-lisp.el (org-babel-expand-body:lisp):
(org-babel-execute:lisp):
* lisp/ob-lua.el (org-babel-execute:lua):
* lisp/ob-maxima.el (org-babel-execute:maxima):
* lisp/ob-mscgen.el (org-babel-execute:mscgen):
* lisp/ob-ocaml.el (org-babel-execute:ocaml):
* lisp/ob-octave.el (org-babel-execute:octave):
* lisp/ob-org.el (org-babel-execute:org):
* lisp/ob-perl.el (org-babel-execute:perl):
* lisp/ob-picolisp.el (org-babel-execute:picolisp):
* lisp/ob-plantuml.el (org-babel-execute:plantuml):
* lisp/ob-python.el (org-babel-execute:python):
* lisp/ob-ruby.el (org-babel-execute:ruby):
* lisp/ob-sass.el (org-babel-execute:sass):
* lisp/ob-scala.el (org-babel-execute:scala):
* lisp/ob-scheme.el (org-babel-execute:scheme):
* lisp/ob-screen.el (org-babel-execute:screen):
(org-babel-prep-session:screen):
* lisp/ob-shell.el (org-babel-execute:shell):
(org-babel-variable-assignments:shell):
(org-babel-sh-evaluate):
* lisp/ob-shen.el (org-babel-execute:shen):
* lisp/ob-sql.el (org-babel-execute:sql):
* lisp/ob-sqlite.el (org-babel-execute:sqlite):
* lisp/ob-tangle.el (org-babel-tangle):
(org-babel-tangle-single-block):
* lisp/org-src.el (org-src-associate-babel-session):
* lisp/org.el (org-next-link):
Use `assq' instead of `assoc' with :keyword keys.
2016-09-23 11:20:09 +01:00
Daniel Kraus
Ihor Radchenko
Eli Zaretskii
Stefan Kangas
Mattias Engdegård
Bastien
stardiviner
Chris Clark
Ihor Radchenko
Stefan Kangas
Kyle Meyer
Robert Hambrock
Nicolas Goaziou
Aaron Ecay
Tim Landscheidt
Paul Eggert
Tim Cross
Frederick Giasson