SolidCAM GPPL IDE

Language support for SolidCAM GPPL postprocessor files (.gpp) in Visual Studio Code.

Early Preview — the extension is in active development. Some features may be incomplete. Your feedback and bug reports are very welcome!

Features

Semantic Highlighting & Hover

All syntax highlighting is provided by the language server — variables, procedures, parameters, types, keywords, operators, built-in functions and system variables are color-coded by meaning, not just pattern matching.

Hover over any symbol to see its kind, type, scope, and reference count. System variables show a description from the SolidCAM reference.

Auto-Completion

Context-aware suggestions for keywords, built-in functions, your own variables and procedures, plus 950+ SolidCAM system variables and 94 system procedures with descriptions.

Go to Definition & Find All References

F12 / Ctrl+Click — jump to where a variable or procedure is defined. Shift+F12 — see all usages across the file.

Rename Symbol

F2 — rename a variable or procedure across the entire file. Scope-aware: local renames stay local.

Diagnostics

Parse errors with clear, context-aware messages. Semantic checks: undeclared variables, redeclarations, system variable conflicts.

Document Formatting

Shift+Alt+F — automatic indentation and operator spacing based on the parse tree.

Signature Help

Parameter hints when calling procedures — see expected argument types.

And More

• Document Outline — see the structure of your postprocessor (Ctrl+Shift+O)
• Breadcrumbs — navigate by procedure name
• Folding — collapse proc/endp, if/endif, while/endw, comment blocks
• System Catalog — built-in reference for SolidCAM 2022 system variables and procedures

Formatting Rules

The formatter uses the GPPL parse tree (CST) for precise formatting. Only runs on files with no parse errors.

Empty lines, comments, and string literals are preserved as-is.

Installation

From VSIX (Offline)

1. Download solidcam-gppl-ide-x.y.z.vsix from GitHub Releases
2. In VSCode: Extensions panel → ... → Install from VSIX...

Or via command line:

code --install-extension solidcam-gppl-ide-x.y.z.vsix

Requirements

• Windows (SolidCAM is Windows-only)
• VSCode 1.75+

Feedback

This extension is built for postprocessor developers. If you work with GPPL, your input is invaluable:

• Bug reports — open an issue
• Feature requests — what would save you the most time?
• General impressions — is this heading in the right direction?

License

The VSCode extension client is licensed under MIT. The language server binary is proprietary. See LICENSE for details.