Why Choose CSL?
🔒 Type Safety
Enforce types with familiar syntax: string, number[], "dev"|"prod"
🔍 Rich Validation
Inline annotations like @range(1-100) and constraint blocks for complex rules
🧩 Flexible Structures
Nested tables, wildcard keys (*: type), and any types
config AppConfig {
app_name: string;
version: string @regex("^\\d+\\.\\d+");
environment: "dev" | "prod" = "dev";
database: {
host: string @format(url);
port: number @range(1024, 65535);
ssl?: boolean;
};
constraints {
conflicts database.ssl with insecure_mode;
requires database.ssl => environment == "prod";
}
}First-Class Tooling
💡 IDE Support
Autocomplete, linting, and inline documentation
✅ Validation CLI
Instant config validation with rich error reporting
📚 Docs Generator
Automatically generate human-readable documentation
Get Started with CSL
Step 1
Build From Source
Build a CSL implementation:
git clone https://github.com/nullptr-0/toml.git
cd toml
cmake -B build -S .
cmake --build build
Step 2
Create Your First Schema
Start with basic type definitions:
config AppConfig {
app_name: string;
port: number @range(1, 65535);
features: string[];
}Key Features to Explore
🔗 Type Unions
method: "GET" | "POST"
⚖️ Constraints
requires ssl => port == 443
🌐 Wildcards
*: { path: string }