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| <TITLE>Usage Notes</TITLE> |
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| <H2>1.3 Usage Notes</H2> |
| <A NAME="131"><H3>1.3.1 Compatibility Issues</H3></A> |
| <P>This implementation of the C++ Standard Library conforms to <I>ISO/IEC 14882:2003 -- International Standard for Information Systems -- Programming Language C++</I>. This release is source compatible with previous 2.x implementations.</P> |
| <P>1.x implementations of the library were based on <I>ANSI's Working Paper for Draft Proposed International Standard for Information Systems -- Programming Language C++</I>. The draft standard differs from the final standard in some areas. As a result, source written to 1.x implementations of the library will be incompatible with this implementation in these areas. See the readme file for details.</P> |
| <P>Please note that some compiler and library vendors have not yet implemented the whole range of language features defined by the ANSI/ISO standard. </P> |
| <BLOCKQUOTE><HR><B> |
| NOTE -- The C++ Standard Library is not yet fully implemented by all compilers. You may experience difficulty if you attempt to use features of the library that are unsupported by your compiler. |
| </B><HR></BLOCKQUOTE> |
| <P>In the <I>User's Guide</I>, we draw your attention to places in the code where this might be a problem. If your vendor is still in the process of meeting the standard, some of the techniques demonstrated in this <I>User's Guide</I> may not work. We include them anyway to demonstrate the full range of capabilities of the standard C++ language. Compilers will catch up, and this guide will be more useful to you if it is as complete as possible.</P> |
| <A NAME="132"><H3>1.3.2 The std Namespace</H3></A> |
| <P>Everything in the Apache C++ Standard Library is contained in the <SAMP>std</SAMP> namespace. You must specify a <SAMP>using</SAMP> directive or explicitly scope any name from the library.</P> |
| <P>To use the <B><I><A HREF="../stdlibref/vector.html">vector</A></I></B> class, for example, you could include one of the following <SAMP>using</SAMP> directives:</P> |
| |
| <UL><PRE> |
| using namespace std; // Brings all names from std |
| // into current scope. |
| |
| using std::vector; // Brings vector into |
| // current scope. |
| </PRE></UL> |
| <P>or explicitly scope <B><I><A HREF="../stdlibref/vector.html">vector</A></I></B> whenever it is used: </P> |
| |
| <UL><PRE> |
| std::vector<int> v; |
| </PRE></UL> |
| <BLOCKQUOTE><HR><B> |
| NOTE -- To enhance this manual's readability, namespace scoping is usually omitted in the text. You should assume that everything in the Apache C++ Standard Library is scoped in namespace <SAMP>std</SAMP> unless otherwise stated. |
| </B><HR></BLOCKQUOTE> |
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