Clarion Extension for Visual Studio Code
Professional Clarion language support for Visual Studio Code with intelligent code navigation, IntelliSense, and build integration.
🚀 Quick Links
✨ Key Features
🎨 Clarion & Template Language Support
Full language support for Clarion code, basic support for templates.
- Clarion files (.clw, .inc) - Complete syntax highlighting and IntelliSense
- Template files (.tpl, .tpw) - Syntax highlighting with 100+ template keywords
- Code folding for structures and template blocks
- Context-aware coloring for Clarion code
- Note: Template files have syntax highlighting only (no IntelliSense/navigation)
- Learn more about Code Editing →
💡 Signature Help & Documentation
Get instant parameter hints and documentation - works immediately, no solution needed!
✏️ Code Snippets
Write code faster with 50+ smart snippets - works immediately!
📂 Solution Management
Open any Clarion solution - just open the folder.
🧭 Smart Code Navigation
Jump to definitions, find implementations, and explore references — works in same file immediately, cross-file with solution.
- Press F12 to go to definition (same file: no solution needed!)
- Press Ctrl+F12 to go to implementation
- Press Shift+F12 for Find All References — scope-aware across all project files
- Hover for documentation — declaration location, class/interface context, type info
- Chained navigation:
SELF.Order.RangeList.Init — hover, F12, Ctrl+F12, and references resolve through CLASS, QUEUE, and GROUP type chains
- SELF/PARENT properties: F12 on
SELF.List navigates to the class member declaration
- Typed variable members: F12/Ctrl+F12/hover on
obj.Method() where obj is any typed variable
- INTERFACE support: hover, F12, Ctrl+F12, and references for interface methods, IMPLEMENTS(), and 3-part
Class.Interface.Method implementations
- CLASS type names: F12 and Find All References work on type names in parameter and variable declarations
- Cross-file navigation requires solution
- Learn more about Navigation →
🔧 Build Integration
Generate applications directly from VS Code.
🎯 Real-time Diagnostics
Catch errors as you type.
Productivity features to write code faster.
📦 Installation
Requirements
- Visual Studio Code (latest version)
- Clarion (for build features)
Quick Install
- Open VS Code
- Press
Ctrl+Shift+X
- Search for "Clarion Extensions"
- Click Install
Detailed installation instructions →
🎓 Learning Resources
For New Users
Feature Documentation
Reference
🆕 What's New
Latest: v0.8.7 (2026-03-15)
🔍 Find All References (Shift+F12)
Full scope-aware Find All References — SELF/PARENT members, typed variables, chained chains, MAP/MODULE procedures, structure fields, INTERFACE methods, IMPLEMENTS(), CLASS type names, and overload filtering.
🔌 Clarion INTERFACE Support
Complete language support for interfaces — hover, F12, Ctrl+F12, and Find All References for interface methods, IMPLEMENTS() declarations, and 3-part Class.Interface.Method implementations.
🎨 Hover Quality Overhaul
- Clean class type cards (
ClassName — CLASS, TYPE · 📦 Defined in File at line N)
🔷 Class property of ClassName and 🔌 Interface method of InterfaceName labels- F12/Ctrl+F12 hints suppressed when already at declaration/implementation
- Implementation body previews removed (location only, matching TypeScript/C# style)
🔗 Deep Chained Navigation
Hover, F12, Ctrl+F12, and references for any depth of SELF.A.B.C chains including CLASS, QUEUE, and GROUP intermediate types.
See full changelog →
Recent: v0.8.6 (2026-01-12)
- 50-70% faster Ctrl+F12 - CrossFileCache reduces subsequent navigations to <100ms
- First navigation: 2-4 seconds (reads + caches file)
- Subsequent navigations: <100ms (cache hits)
🎯 Routine Support Enhancements
- Full namespace prefix support -
DO DumpQue::SaveQState now works with hover and Ctrl+F12
- New RoutineHoverResolver with code preview
- Added
DO_ROUTINE and ROUTINE_LABEL patterns
🏗️ Solution View Enhancements
- Dependency-aware build order - Projects build in correct dependency order
- Application sort toggle - Switch between Solution Order and Build Order
- Build progress indicators - Spinning icon, build counter (e.g., "Building 2/5")
- Batch UpperPark commands - Import/Export/Show All Differences
- New context menu commands - Build Project, Generate + Build, Copy Path, Open in Clarion IDE
- Generate All/Build All - Build multiple applications in dependency order
🐛 Navigation & Hover Fixes
- FUNCTION declarations now work with Ctrl+F12 (cross-project)
- Procedures without parameters show correct hover info
- Methods named like keywords (e.g., MESSAGE) show method info instead of keyword help
See full changelog →
Recent: v0.8.5 (2026-01-09)
🔧 Folding Provider Fix
Fixed critical issues with code folding for window definitions:
- APPLICATION structures now fold correctly
- Nested MENU structures fold properly at any indentation level
- Removed arbitrary 50-column limit for structure recognition
Impact: Complex window/application definitions with nested menus now have proper code folding support.
Recent: v0.8.4 (2026-01-09)
🎨 Template Language Support
Dedicated syntax highlighting for .tpl and .tpw files with 100+ template keywords.
50-60% faster token processing with optimized caching and parent relationship indexing.
🎯 Scope-Aware Navigation
F12 now correctly prioritizes local variables over globals with the same name.
See full changelog →
💬 Support & Feedback
📄 License
MIT License
🙏 Acknowledgments
Special thanks to:
- fushnisoft - Original Clarion syntax highlighting
- The Clarion community for feedback and testing
