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Oct 30, 2017
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Format functor class example #124

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18 changes: 10 additions & 8 deletions docs/standard-library/function-objects-in-the-stl.md
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Expand Up @@ -23,15 +23,17 @@ A *function object*, or *functor*, is any type that implements operator(). This
## Creating a Function Object
To create a function object, create a type and implement operator(), such as:

```
class Functor
{
public:
int operator()(int a, int b)
{
return a <b;
}
};

{
public:
int operator()(int a, int b)
{
return a < b;
}
};
```

The last line of the `main` function shows how you call the function object. This call looks like a call to a function, but it is actually calling operator() of the Functor type. This similarity between calling a function object and a function is how the term function object came about.

## Function Objects and Containers
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