Atmel CAVR-4 Manual De Usuario

CAVR-4

Overview

Reference Guide

●

New cast syntax (the operators 

dynamic_cast

, 

static_cast

, 

reinterpret_cast

, and 

const_cast

)

●

Namespaces

●

Mutable attribute.

The exclusion of these language features makes the runtime library significantly more 
efficient. The Embedded C++ library furthermore differs from the full C++ library in 
that:

●

The standard template library (STL) is excluded

●

Streams, strings, and complex numbers are supported without the use of templates

●

Library features which relate to exception handling and runtime type information 
(the headers 

except

, 

stdexcept,

 and 

typeinfo

) are excluded.

Note: The library is not in the 

std

 namespace, because Embedded C++ does not 

support namespaces.

IAR Extended EC++ is a slightly larger subset of C++ which adds the following features 
to the standard EC++:

●

Full template support

●

Multiple and virtual inheritance

●

Namespace support

●

Mutable attribute

●

The cast operators 

static_cast

, 

const_cast

, and 

reinterpret_cast

.

All these added features conform to the C++ standard.

To support Extended EC++, this product includes a version of the standard template 
library (STL), in other words, the C++ standard chapters utilities, containers, iterators, 
algorithms, and some numerics. This STL does neither use exceptions and multiple 
inheritance, nor does it use runtime type information (

rtti

). Moreover, the library is 

not in the 

std

 namespace.

Note: A module compiled with Extended EC++ enabled is fully link-compatible with 
a module compiled without Extended EC++ enabled.

In the AVR IAR C/C++ Compiler, the default language is C. To be able to compile files 
written in Embedded C++, you must use the 

--ec++

 compiler option. See --ec++, page 

179. You must also use the IAR DLIB runtime library.

To take advantage of Extended Embedded C++ features in your source code, you must 
use the 

--eec++

 compiler option. See --eec++, page 180.