Language support for fl

This extension adds language support for Voss II's functional language fl to Visual Studio Code.

Tested for VossII version 1.0 (built on 2021-11-22).

Features

Features include:

• Basic syntaxic highlighting for fl (tested in Dark+ and Light+ themes)
• Basic syntaxic highlighting for bifrost (Jeremy's language used to compile assembly like code to hfl)
• Commands to send files/lines/selections to an fl interpreter with predefined shortcuts
• Tooltips generated from fl's help texts
• Go to definition when pressing f12 while having the cursor over a function name/operator

Note that appart from syntax highlighting, feature require to have an fl interpreter running and symbols defined to work properly. Running your current file frequently is advised

Commands and shortcuts:

Command	Effect	Shortcut
fl: start fl	Starts the interpreter	Automaticaly when opening fl files
fl: stop fl	Stops the interpreter
fl: help	Displays help on the word/operator under the cursor in the fl interpreter
fl: restart and run file	Restarts the interpreter and runs current file	f5
fl: run file	Runs the current file in the interpreter	f6
fl: run line	Runs the current line in the interpreter	f7
fl: run selection	Runs the current selection (or word under cursor) in the interpreter	f8
fl: run paragraph	Runs the current paragraph (text block separated by empty lines) in the interpreter	f9

Commands can be run by typing their name in the command palette (Ctrl+Shift+P).

Shortcuts can be reassigned in File > Preferences > Keyboard Shortcuts

Requirements

The syntax highlighting has no requirements. All other functionnalities require to have Voss II installed and the path to the fl interpreter specified in settings.

Extension Settings

This extension contributes the following settings:

• vossii-fl.path: path to the fl interpreter (default "fl")
• vossii-fl.run_on_startup: Automaticaly run fl when opening a file/workspace with fl files (default on)
• vossii-fl.fl_setup: fl code to run whenever starting fl (default set_font font_larger;)
• vossii-fl.save_file_on_run: behavior when running unsaved files. Chose between Ask me (default), Autosave and Don't save (runs the last save).
• vossii-fl.temporary_files_root: path and prefix of temporary files used to communicate with fl (default /tmp/fl_)

Known Issues

• When running a selection/line, DIR will be the workspace folder and not the file root as expected (this isn't a problem when running files)
• Getting tooltips/definition may not work on first try. If so, move mouse out and back over or hit f12 again.
• Can only get tooltips/go to definition for global function, both fail for types or local variables.