---------------------------------------------------
lines 11-68 of file: include/cppad/core/ad_ctor.hpp
---------------------------------------------------

{xrst_begin ad_ctor}

AD Constructors
###############

Syntax
******
| ``AD`` < *Base* > *ay* ()
| ``AD`` < *Base* > *ay* ( *x* )

Purpose
*******
creates a new ``AD`` < *Base* > object *ay*
and initializes it as a
equal to *x* .

x
*

implicit
========
There is an implicit constructor where *x* has prototype

    ``const VecAD`` < *Base* >& *x*

There also is an implicit constructor where *x* has prototype

    ``const`` *Base* & *x*

In this case, *ay* is a
:ref:`constant parameter<glossary@Parameter@Constant>`

explicit
========
There is an explicit constructor where *x* has prototype

    ``const`` *Type* & *x*

for any type that has an explicit constructor of the form
*Base* ( *x* ) .
In this case, *ay* is a
:ref:`constant parameter<glossary@Parameter@Constant>`

ay
**
The target *ay* has prototype

    ``AD`` < *Base* > *ay*

Example
*******
{xrst_toc_hidden
    example/general/ad_ctor.cpp
}
The files :ref:`ad_ctor.cpp-name` contain examples and tests of these operations.
It test returns true if it succeeds and false otherwise.

{xrst_end ad_ctor}