GPC Language Support for VS Code
A comprehensive Visual Studio Code extension for the Cronus Zen's GPC Scripting language, providing rich language features including syntax highlighting, intelligent code completion, error detection, and advanced code navigation.
Known Issues
- Weird syntax error messages (blame ANTLR4)
Features
🎨 Syntax Highlighting
- Rich syntax coloring
- Keyword highlighting
- Data type highlighting
- String and comment highlighting
- Number highlighting
- Boolean highlighting
🧠 IntelliSense & Code Completion
- Smart auto-completion for keywords, data types, and identifiers
- Built-in function completion with parameter signatures and descriptions
- User-defined function completion with parameter hints
- Variable and constant completion with context awareness
- Snippet support with parameter placeholders for functions
📖 Documentation & Help
- Hover information showing detailed documentation for:
- Built-in functions with descriptions and parameter info
- User-defined functions with signatures
- Variables and constants with type information
- Signature help displaying parameter information while typing function calls
- Parameter counting and active parameter highlighting
🔍 Code Navigation
- Go to Definition - Navigate to function and variable declarations
- Find All References - Locate all usages of symbols throughout your code
- Document Symbols - Outline view showing:
- Functions with parameter lists
- Variables and constants
- Hierarchical symbol organization
🎯 Inlay Hints (Configurable)
- Parameter name hints displayed inline for better code readability
- Function call annotations showing parameter names
- Toggleable settings for users who prefer cleaner code view
- Real-time updates when configuration changes
🚨 Error Detection & Diagnostics
- Real-time syntax error detection as you type
- Semantic analysis with two-pass compilation:
- First pass: Collect all declarations (functions, variables, enums, arrays)
- Second pass: Validate references and semantic correctness
- Forward reference support - Use functions before they're defined
- Comprehensive error messages with precise location information
- Warning system for unused variables and other code quality issues
📝 Advanced Language Features
- Intelligent parsing using ANTLR4 grammar
- Caching system for improved performance
- Built-in language constants recognition
- Function validation with parameter count checking
⚙️ Configuration Options
The extension provides several customizable settings:
Inlay Hints Settings
gpc.inlayHints.enabled (boolean, default: true)
- Master toggle for all inlay hints
- Disable to hide all inline annotations
gpc.inlayHints.parameterNames (boolean, default: true)
- Show parameter names in function calls
- Example:
get_val(input: XB1_LT) instead of get_val(XB1_LT)
Installation
- Open VS Code
- Go to Extensions (
Ctrl+Shift+X)
- Search for "GPC Language Support"
- Click Install
Usage
Basic Usage
- Open any
.gpc file
- Enjoy automatic syntax highlighting and language features
- Start typing to see intelligent code completion
- Hover over functions and variables for documentation
Code Completion
- Type function names and see auto-completion with parameter hints
- Use built-in snippets for common patterns
- Navigate through parameters using
Tab
Error Detection
- Syntax errors are highlighted in red with squiggly underlines
- Semantic errors show detailed error messages
- Warnings appear for code quality issues
Navigation
F12 or Ctrl + Click - Go to DefinitionShift + F12 - Find All ReferencesCtrl + Shift + O - Go to Symbol in File
Configuration
VS Code Settings UI
- Open Settings (
Ctrl + ,)
- Search for "gpc"
- Adjust the available options
settings.json Configuration
{
"gpc.inlayHints.enabled": true,
"gpc.inlayHints.parameterNames": true
}
Workspace-specific Settings
Create .vscode/settings.json in your project root:
{
"gpc.inlayHints.enabled": false
}
GPC Language Support
This extension supports the complete GPC language specification including:
Development
Architecture
- Language Server Protocol (LSP) implementation for robust language support
- ANTLR4 grammar for precise parsing
- Two-pass semantic analysis for forward reference support
- Caching system for optimal performance
- Modular design with separate parsing, completion, and feature modules
Contributing
Contributions and suggestions are welcome.
License
This project is licensed under the GNU General Public License v3.0 (GPL-3.0) - see the LICENSE.md file for details.
What this means:
- ✅ Free to use - Use this extension for any purpose
- ✅ Free to modify - Change the code to suit your needs
- ✅ Free to distribute - Share the extension and your modifications
- ⚠️ Copyleft - If you distribute modified versions, they must also be GPL-3.0 licensed
- ⚠️ No warranty - Provided "as-is" without warranty of any kind
Copyright (C) 2025 zkiwiko
Changelog
Latest Features
- ✅ Full syntax highlighting
- ✅ IntelliSense with built-in function support
- ✅ Real-time error detection
- ✅ Hover documentation
- ✅ Go to definition and find references
- ✅ Configurable inlay hints
- ✅ Document symbols and outline view
- ✅ Signature help for function calls
- ✅ Forward reference support
- ✅ Comprehensive built-in function library
