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Use object_cast instead of assign in the example

This commit is contained in:
Sylvain Pion 2008-07-29 12:01:35 +00:00
parent 7757dda09e
commit aec07c1fe2
1 changed files with 5 additions and 9 deletions
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14
Kernel_23/doc_tex/Kernel_23_ref/intersection.tex
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@ -338,25 +338,21 @@ The following example demonstrates the most common use of
void foo(CGAL::Segment_2<Kernel> seg, CGAL::Line_2<Kernel> line) void foo(CGAL::Segment_2<Kernel> seg, CGAL::Line_2<Kernel> line)
{ {
CGAL::Object result; CGAL::Object result = CGAL::intersection(seg, line);
CGAL::Point_2<Kernel> ipoint; if (const CGAL::Point_2<Kernel> *ipoint = CGAL::object_cast<CGAL::Point_2<Kernel> >(&result)) {
CGAL::Segment_2<Kernel> iseg;
result = CGAL::intersection(seg, line);
if (CGAL::assign(ipoint, result)) {
\end{verbatim}% \end{verbatim}%
\ccHtmlLinksOff% \ccHtmlLinksOff%
\begin{verbatim} \begin{verbatim}
// handle the point intersection case. // handle the point intersection case with *ipoint.
\end{verbatim}% \end{verbatim}%
\ccHtmlLinksOn% \ccHtmlLinksOn%
\begin{verbatim} \begin{verbatim}
} else } else
if (CGAL::assign(iseg, result)) { if (const CGAL::Segment_2<Kernel> *iseg = CGAL::object_cast<CGAL::Segment_2<Kernel> >(&result)) {
\end{verbatim}% \end{verbatim}%
\ccHtmlLinksOff% \ccHtmlLinksOff%
\begin{verbatim} \begin{verbatim}
// handle the segment intersection case. // handle the segment intersection case with *iseg.
\end{verbatim}% \end{verbatim}%
\ccHtmlLinksOn% \ccHtmlLinksOn%
\begin{verbatim} \begin{verbatim}