G-code Syntax

Description

This extension offers syntax highlighting and a small collection of code snippets for G-code-based CNC programs.

The extension is currently based on using a Mitsubishi 700 Series CNC control (lathe system), which is a "Fanuc-like" control.

Features

Syntax Highlighting

Highlighting uses colors based on the current theme. Unfortunately, most themes (if any?) will not target many elements of a CNC program. I had to mostly apply scopes that were not semantically accurate to get the syntax highlighting that I wanted. There will be some themes where the highlighting does not look so good. This is because there is no consistency in the scopes that the various themes are targeting.
An attempt was made to highlight the X, Y, & Z coordinate positions with unique colors. Position-based words for these axes are currently highlighted using the following scopes:
- X & U: string
- Y & V: support.class
- Z & W: storage.type

Code Snippets

Convenient snippets for common G-code commands and patterns:

G70 | G71 | G72 | G73
op-description: inserts a sequence # followed by a comment
- example: N1000 (FACE OFF)
star-padded-comment: inserts a comment padded with stars
- example: (*** A COMMENT ***)
dash-padded-comment: inserts a comment padded with dashes
- example: (--- ANOTHER COMMENT ---)

Commands

Toggle Line Comment ctrl+/: Toggles parentheses-based line comments for the current line(s)/selected text.

File Extensions

The above features will be applied to files with the following extensions:

[".nc", ".cnc", ".eia", ".gcode"]

Additional file extensions can be included by adding the following to your user or workspace settings.json:

{
  "files.associations": {
    "*.ext1": "gcode",
    "*.ext2": "gcode",
    "*.ext3": "gcode"
  }
}
// This will associate files with extensions of ".ext1", ".ext2", and ".ext3"

Requirements

No requirements at this time.

Extension Settings

This extension includes default settings for G-code files. These defaults are automatically applied when the extension is installed.

Default Settings

The following default settings are applied to G-code files:

{
  "[gcode]": {
    "editor.suggestOnTriggerCharacters": true,
    "editor.acceptSuggestionOnEnter": "off",
    "editor.snippetSuggestions": "top",
    "editor.suggest.snippetsPreventQuickSuggestions": true
  }
}

CNC G-code Syntax

Dustin Gray