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.config/emacs/modules/lang/fsharp/README.org

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+#+TITLE:   lang/fsharp
+#+DATE:    May 22, 2019
+#+SINCE:   {replace with next tagged release version}
+#+STARTUP: inlineimages
+
+* Table of Contents :TOC_3:noexport:
+- [[#description][Description]]
+  - [[#module-flags][Module Flags]]
+  - [[#plugins][Plugins]]
+  - [[#hacks][Hacks]]
+- [[#prerequisites][Prerequisites]]
+  - [[#mono][Mono]]
+    - [[#osx][OSX]]
+    - [[#arch-linux][Arch Linux]]
+  - [[#lsp][LSP]]
+- [[#features][Features]]
+- [[#configuration][Configuration]]
+- [[#troubleshooting][Troubleshooting]]
+
+* Description
+# A summary of what this module does.
+
+# + If possible, include a brief list of feature highlights here
+# + Like code completion, syntax checking or available snippets
+# + Include links to packages & external things where possible
+This module adds [[https://fsharp.org/][F#]] support.
++ Code completion
++ eldoc support
++ Syntax checking
+
+** Module Flags
++ =+lsp= Enables lsp-fsharp (this requires ~:tools lsp~ to be enabled).
+** Plugins
++ [[https://github.com/fsharp/emacs-fsharp-mode][fsharp-mode]]
++ =+lsp=
+  + [[https://github.com/emacs-lsp/lsp-mode/blob/master/clients/lsp-fsharp.el][lsp-fsharp]]
+** Hacks
+None so far.
+
+* Prerequisites
+** Mono
+To get code completion/syntax checking when not using lsp, you will need to install [[https://www.mono-project.com/][mono]].
+*** OSX
+Do *NOT* install mono via brew. See this [[https://github.com/fsharp/FsAutoComplete/issues/331][issue]].
+*** Arch Linux
+#+BEGIN_SRC sh
+sudo pacman -S mono
+#+END_SRC
+** LSP
+The language server is automatically installed by [[https://github.com/emacs-lsp/lsp-mode/blob/master/clients/lsp-fsharp.el][lsp-fsharp]].
+* Features
+An in-depth list of features, how to use them, and their dependencies.
+
+* Configuration
+How to configure this module, including common problems and how to address them.
+
+* Troubleshooting
+Common issues and their solution, or places to look for help.

.config/emacs/modules/lang/fsharp/config.el

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+;;; lang/fsharp/config.el -*- lexical-binding: t; -*-
+
+(after! fsharp-mode
+  (when (executable-find "dotnet")
+    (setq inferior-fsharp-program "dotnet fsi --readline-"))
+  (if (featurep! +lsp)
+      (progn
+        (setq fsharp-ac-intellisense-enabled nil)
+        (add-hook 'fsharp-mode-local-vars-hook #'lsp!))
+    (setq fsharp-ac-use-popup nil) ; Use a buffer for docs rather than a pop-up
+    (set-lookup-handlers! 'fsharp-mode :async t :definition #'fsharp-ac/gotodefn-at-point)
+    (set-company-backend! 'fsharp-mode 'fsharp-ac/company-backend))
+  (set-repl-handler! 'fsharp-mode #'run-fsharp)
+  (map! :localleader
+        :map fsharp-mode-map
+        "b" #'fsharp-ac/pop-gotodefn-stack ; Useful for re-tracing your steps
+        "e" #'fsharp-eval-region
+        "l" #'fsharp-load-buffer-file
+        (:unless (featurep! +lsp)
+         "q" #'fsharp-ac/stop-process
+         "t" #'fsharp-ac/show-tooltip-at-point)))

.config/emacs/modules/lang/fsharp/doctor.el

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+;;; lang/fsharp/doctor.el -*- lexical-binding: t; -*-
+
+(when (require 'fsharp-mode nil t)
+  (unless (cl-some #'fsharp-mode--executable-find '("fsharpc" "fsc"))
+    (warn! "Cannot find the F# compiler. Most features will not work.")))

.config/emacs/modules/lang/fsharp/packages.el

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+;; -*- no-byte-compile: t; -*-
+;;; lang/fsharp/packages.el
+
+(package! fsharp-mode :pin "c90d762c0692cc43032291d37b8ca3201c3d49bd")