Uniform Function Call Syntax

<p>Uniform Function Call Syntax (UFCS) or Uniform Call Syntax (UCS) or sometimes Universal Function Call Syntax is a <a href="/facts/Programming_language/cWTYbgWa">programming language</a> feature in <a href="/facts/D_(programming_language)/4qIzRjkF">D</a>, <a href="/facts/Nim_(programming_language)/KBmz14Ek">Nim</a>, Koka, and Effekt that allows any <a href="/facts/Function_(computer_programming)/9vFJrg0A">function</a> to be called using the syntax for method calls (as in <a href="/facts/Object-oriented_programming/TxNMEcao">object-oriented programming</a>), by using the receiver as the first parameter and the given arguments as the remaining parameters. The same technique is used in the <a href="/facts/AviSynth/ajQdlPmQ">AviSynth</a> scripting language under the name "OOP notation".
</p><p>UFCS is particularly useful when function calls are chained (behaving similar to <a href="/facts/Pipe_(computer_science)/vNahQdsH">pipes</a>, or the various dedicated <a href="/facts/Operator_(computer_programming)/7TnU5LKu">operators</a> available in <a href="/facts/Functional_language/cdxqPEIM">functional languages</a> for passing values through a series of <a href="/facts/Expression_(computer_science)/eRlhoBeN">expressions</a>). It allows free-functions to fill a role similar to <a href="/facts/Extension_method/fkvzp3Nx">extension methods</a> in some other languages. Another benefit of the syntax is related to completion systems in <a href="/facts/Integrated_development_environment/jbEINSQf">IDEs</a>, which use type information to show a list of available functions, dependent on the context. When the programmer starts with an argument, the set of potentially applicable functions is greatly narrowed down, aiding <a href="/facts/Discoverability/DgccltrA">discoverability</a>.
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Uniform Function Call Syntax open-in-new

Uniform Function Call Syntax