Continue parameterization

structure test behaviour, define default behaviour and to structure computation

in a module.

The extension for [object oriented features] also permits declaring [methods].

Further, the extension for [object oriented features] permits declaring [methods].

Platform specific behaviour may be provided by the means of [external

functions].

### General

Parameterization may be used to specify dynamic behaviour -- or [values

in the case of dynamic templates](15.2).

Parameterization may be used to specify dynamic behaviour -- or [dynamic

templates](15.2).

TTCN-3 distinguishes between different kinds of parameterization:

- _type parameterization_ as specified in [advanced parameterization

extension].

> NOTE: technically there is also a kind of indirect parameterization through

> the use of references. But it is strongly recommended to favor the more

> explicit _value parameterization_ over _indirect parameterization through

> references_ when possible; because the later can introduce subtle

> inconsistencies between individual tools and use-cases.

>

> The term _parameterization_ will be used interchangeably with _value

> NOTE: technically there is also indirect parameterization through the use of

> references. But it is strongly recommended to favor the more explicit _value

> parameterization_ over _indirect parameterization through references_ when

> possible; because the later can introduce subtle inconsistencies between

> individual tools and use-cases.

> NOTE: The term _parameterization_ will be used interchangeably with _value

> parameterization_ in this document, unless stated differently.

> NOTE: Parameters are very similar to variables in the sense they provide a

A _formal parameter_ may have an _initial value assignment_. Such a parameter

is called _default parameter_ and is described in [default parameters].

A _formal parameter_ is either an _in-parameter_ (indicated by the `in`

keyword), _inout-parameter_ (indicated by the `inout` keyword) or

_out-parameter_ (indicated by the `out` keyword).

A _formal parameter_ without any of these keywords is considered an _in-parameter_.

A _in-parameter_ is _passed by value_. Each invocation of the parameterized

TTCN-3 language object has its own copy.

A _formal parameter_ is either an _in-parameter_, indicated by the `in`

keyword, _inout-parameter_, indicated by the `inout` keyword, or

_out-parameter_, indicated by the `out` keyword.

A _out-parameter_ is passed by value_.

A _formal parameter_ without any of these keywords is considered an

_in-parameter_.

> TODO: Hat ein out-parameter sein egienen memory (wie in-parameter). Wann passiert expansion,

> 

An _in-parameter_ is _passed by value_. 

A _out-parameter_ is also _passed by value_.

Each invocation of the parameterized TTCN-3 language object has its own copy.

A _inout-parameter_ is _passed by reference_.