diff options
Diffstat (limited to 'doc/html/variant/tutorial.html')
| -rw-r--r-- | doc/html/variant/tutorial.html | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/doc/html/variant/tutorial.html b/doc/html/variant/tutorial.html index 21a3e6ec8a..9d5ac6055e 100644 --- a/doc/html/variant/tutorial.html +++ b/doc/html/variant/tutorial.html @@ -77,15 +77,15 @@ contained value. There are two ways to accomplish this: <code class="computeroutput"><a class="link" href="../boost/apply_visitor.html" title="Function apply_visitor">apply_visitor</a></code>, which is safest and very powerful, and - <code class="computeroutput"><a class="link" href="../boost/get_idp94543392.html" title="Function get">get</a><T></code>, which is + <code class="computeroutput"><a class="link" href="../boost/get_idp108797984.html" title="Function get">get</a><T></code>, which is sometimes more convenient to use.</p> <p>For instance, suppose we wanted to concatenate to the string contained in <code class="computeroutput">v</code>. With <span class="bold"><strong>value retrieval</strong></span> - by <code class="computeroutput"><a class="link" href="../boost/get_idp94543392.html" title="Function get">get</a></code>, this may be accomplished + by <code class="computeroutput"><a class="link" href="../boost/get_idp108797984.html" title="Function get">get</a></code>, this may be accomplished quite simply, as seen in the following: </p> -<pre class="programlisting">std::string& str = <code class="computeroutput"><a class="link" href="../boost/get_idp94543392.html" title="Function get">boost::get</a></code><std::string>(v); +<pre class="programlisting">std::string& str = <code class="computeroutput"><a class="link" href="../boost/get_idp108797984.html" title="Function get">boost::get</a></code><std::string>(v); str += " world! ";</pre> <p> @@ -112,9 +112,9 @@ str += " world! ";</pre> </p> <pre class="programlisting">void times_two( boost::variant< int, std::string > & operand ) { - if ( int* pi = <code class="computeroutput"><a class="link" href="../boost/get_idp94543392.html" title="Function get">boost::get</a></code><int>( &operand ) ) + if ( int* pi = <code class="computeroutput"><a class="link" href="../boost/get_idp108797984.html" title="Function get">boost::get</a></code><int>( &operand ) ) *pi *= 2; - else if ( std::string* pstr = <code class="computeroutput"><a class="link" href="../boost/get_idp94543392.html" title="Function get">boost::get</a></code><std::string>( &operand ) ) + else if ( std::string* pstr = <code class="computeroutput"><a class="link" href="../boost/get_idp108797984.html" title="Function get">boost::get</a></code><std::string>( &operand ) ) *pstr += *pstr; }</pre> <p> @@ -509,7 +509,7 @@ int_tree_t var(result);</pre> <code class="computeroutput">var</code> as <code class="computeroutput">( 1 ( 3 5 ) 7 )</code>.</p> <p>Finally, note that a type sequence can be used to specify the bounded types of a recursive <code class="computeroutput">variant</code> via the use of - <code class="computeroutput"><a class="link" href="../boost/make_recursiv_idp351329984.html" title="Class template make_recursive_variant_over">boost::make_recursive_variant_over</a></code>, + <code class="computeroutput"><a class="link" href="../boost/make_recursiv_idp295097024.html" title="Class template make_recursive_variant_over">boost::make_recursive_variant_over</a></code>, whose semantics are the same as <code class="computeroutput">make_variant_over</code> (which is described in <a class="xref" href="tutorial.html#variant.tutorial.over-sequence" title="Using a type sequence to specify bounded types">the section called “Using a type sequence to specify bounded types”</a>).</p> <p><span class="bold"><strong>Portability</strong></span>: Unfortunately, due to @@ -634,19 +634,20 @@ struct if_visitor: public <code class="computeroutput"><a class="link" href="../ </p> <pre class="programlisting"> -bool_like_t v0(1), v1(true), v2(1.0); +bool_like_t v0(true), v1(1), v2(2.0); assert( <code class="computeroutput"><a class="link" href="../boost/apply_visitor.html" title="Function apply_visitor">boost::apply_visitor</a></code>(if_visitor(), v0, v1, v2) == - arithmetics_t(true) + arithmetics_t(1) ); </pre> <p> </p> <p>Finally, we must note that multi visitation does not support "delayed" form of - <code class="computeroutput"><a class="link" href="../boost/apply_visitor.html" title="Function apply_visitor">apply_visitor</a></code>. + <code class="computeroutput"><a class="link" href="../boost/apply_visitor.html" title="Function apply_visitor">apply_visitor</a> if + <a class="link" href="../BOOST_VARIANT_DO_NOT_USE_VARIADIC_TEMPLATES.html" title="Macro BOOST_VARIANT_DO_NOT_USE_VARIADIC_TEMPLATES">BOOST_VARIANT_DO_NOT_USE_VARIADIC_TEMPLATES</a> is defined</code>. </p> </div> </div> |