CCL: A Minimalist Configuration Language Based on Category Theory
2025-01-11
The author presents CCL, a minimalist configuration language inspired by Category Theory. CCL's core is key-value pairs, eschewing complex features in favor of composability and extensibility. Clever use of whitespace and simple rules handle nested structures and comments, enabling powerful features like lists, comments, sections, and multiline strings while maintaining extreme simplicity. A unique fixed-point design elegantly solves key override conflicts. Leveraging monoids and monoid homomorphisms from Category Theory ensures correct and efficient configuration composition. CCL's code is concise, easily understood, and readily implemented, making it a valuable example of elegant software design.