<language> (Or "Operator overloading"). Use of a single
symbol to represent operators with different argument types,
e.g. "-", used either, as a monadic operator to negate an
expression, or as a dyadic operator to return the difference
between two expressions. Another example is "+" used to add
either integers or floating-point numbers. Overloading is
also known as ad-hoc polymorphism.
User-defined operator overloading is provided by several
modern programming languages, e.g. C++'s class system and
the functional programming language Haskell's type
classes.
