Editing F Sharp (programming language) (section)

===Metaprogramming===
F# allows some forms of syntax customizing via [[metaprogramming]] to support embedding custom [[domain-specific language]]s within the F# language, particularly through computation expressions.<ref name="overview"/>

F# includes a feature for run-time meta-programming called quotations.<ref name="quotations">{{cite web |url=http://msdn.microsoft.com/en-us/library/dd233212.aspx |title=Code Quotations (F#) |access-date=2012-11-24}}</ref> A quotation expression evaluates to an abstract syntax tree representation of the F# expressions. Similarly, definitions labelled with the <code>[&lt;ReflectedDefinition&gt;]</code> attribute can also be accessed in their quotation form. F# quotations are used for various purposes including to compile F# code into [[JavaScript]]<ref name="js"/> and [[Graphics processing unit|GPU]]<ref name="gpgpu"/> code. Quotations represent their F# code expressions as data for use by other parts of the program while requiring it to be syntactically correct F# code.