I think @yishaigalatzer has in mind a "regular" constraint resolver for regular constraints:
```c#
...
constraints: new {
    foo = new RegularConstraint(...), // implements IRouteConstraint
    bar = "regex", // RegEx
    baz = new CustomObjectOfSomeSort(...), // doesn't implement any framework interface
}
...
```

The constraints could presumably go through a "regular" constraint resolver to process them into an `IRouteConstraint`.

This is all theoretical, of course, but I think the term "Inline" is acceptable.