Uniform function call syntax

Uniform function call syntax (UFCS) or uniform call syntax (UCS) is a programming language feature in D, Nim, Koka, Effekt,, Lean, and other programming languages, that allows any function to be called using the syntax for method calls (as in object-oriented programming), by using the receiver as the first parameter and the given arguments as the remaining parameters. The same technique is used in the AviSynth scripting language under the name "OOP notation".

Source: Wikipedia — Uniform function call syntax (CC BY-SA 4.0)