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removed footnote
removed default_iterator_policies::less


[SVN r11018]
This commit is contained in:
Jeremy Siek
2001-09-04 14:51:02 +00:00
parent 0e40c56a87
commit 80eb3699d7
1 changed files with 11 additions and 13 deletions
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tmpw2001-paper/iter-adaptor.tex
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@@ -87,7 +87,7 @@
\begin{document} \begin{document}
\title{Policy Adaptors in the Boost Iterator Adaptor Library} \title{Policy Adaptors and the Boost Iterator Adaptor Library}
\author{David Abrahams$^\dag$ and Jeremy Siek$^\ddag$\thanks{This work \author{David Abrahams$^\dag$ and Jeremy Siek$^\ddag$\thanks{This work
was partially supported by NSF grant ACI-9982205.} \\ was partially supported by NSF grant ACI-9982205.} \\
@@ -156,7 +156,7 @@ iterators. Every one of the standard containers comes with constant
and mutable iterators\footnote{The term \emph{mutable iterator} refers and mutable iterators\footnote{The term \emph{mutable iterator} refers
to iterators over objects that can be changed by assigning to the to iterators over objects that can be changed by assigning to the
dereferenced iterator, while \emph{constant iterator} refers to dereferenced iterator, while \emph{constant iterator} refers to
iterators over objects that cannot be modified}, and also iterators over objects that cannot be modified.}, and also
\code{reverse\_} versions of those same iterators which traverse the \code{reverse\_} versions of those same iterators which traverse the
container in the opposite direction. The Standard also supplies container in the opposite direction. The Standard also supplies
\code{istream\_\-iterator} and \code{ostream\_\-iterator} for reading \code{istream\_\-iterator} and \code{ostream\_\-iterator} for reading
@@ -356,18 +356,20 @@ transform iterator adaptor: an iterator that applies some function to
the value returned by dereferencing the base iterator. The the value returned by dereferencing the base iterator. The
\code{transform\_\-iterator\_\-policies} class is templated on the \code{transform\_\-iterator\_\-policies} class is templated on the
function object type, and a function object is stored as a data member function object type, and a function object is stored as a data member
of the policies class.\footnote{We might instead have composed the of the policies class.
underlying iterator and the function object into a single \code{Base}
type, but that would have been much more work because so many useful % \footnote{We might instead have composed the
defaults are provided when the \code{Base} type is itself an % underlying iterator and the function object into a single \code{Base}
iterator.} % type, but that would have been much more work because so many useful
% defaults are provided when the \code{Base} type is itself an
% iterator.}
When adapting an underlying iterator, it is easiest to store any extra When adapting an underlying iterator, it is easiest to store any extra
state needed by the resulting iterator in the policies class. The state needed by the resulting iterator in the policies class. The
alternative is to wrap the underlying iterator in another class that alternative is to wrap the underlying iterator in another class that
contains the state, thereby incorporating the state into the contains the state, thereby incorporating the state into the
\code{Base} type. This approach is much more work since the wrapping \code{Base} type. This approach is much more work since the wrapping
class will have to delegate lots of operations (instead of allowing class will have to delegate many operations (instead of allowing
the \iteratoradaptor\ to implement the delegations). the \iteratoradaptor\ to implement the delegations).
The policies class inherits from The policies class inherits from
@@ -466,10 +468,6 @@ namespace boost {
template <class Base1, class Base2> template <class Base1, class Base2>
bool equal(const Base1& x, const Base2& y) const bool equal(const Base1& x, const Base2& y) const
{ return x == y; } { return x == y; }
template <class Base1, class Base2>
bool less(const Base1& x, const Base2& y) const
{ return x < y; }
}; };
} // namespace boost } // namespace boost
\end{verbatim} \end{verbatim}
@@ -538,7 +536,7 @@ same iterator type, while in this case the return type would be
\label{sec:iter-object-generator} \label{sec:iter-object-generator}
The next question is how users of the transform iterator will The next question is how users of the transform iterator will
construct the iterator. The \iteratoradaptor\o class has the following construct the iterator. The \iteratoradaptor\ class has the following
constructor. constructor.
{\footnotesize {\footnotesize