Syntactic closure

In computer science, syntactic closures are an implementation strategy for a hygienic macro system. The term pertains to the Scheme programming language.{{cite web |url=https://people.csail.mit.edu/jaffer/slib/Syntactic-Closures.html |title=A Syntactic Closures Macro Facility |last=Hanson |first=Chris |date=November 9, 1991 |website=CSAIL |publisher=MIT |access-date=February 24, 2021 }}

When a syntactic closure is used the arguments to a macro call are enclosed in the current environment, such that they cannot inadvertently reference bindings introduced by the macro itself.