# Parma_Polyhedra_Library::Variable::Compare Struct Reference
[C++ Language Interface]

Binary predicate defining the total ordering on variables. More...

`#include <ppl.hh>`

List of all members.

## Public Member Functions
bool | operator() (Variable x, Variable y) const
| Returns `true` if and only if `x` comes before `y`.

## Detailed Description

Binary predicate defining the total ordering on variables.

The documentation for this struct was generated from the following file:

- ppl.hh