Doc: Update boost::bind()/std::tr1::bind() to std::bind()

boost::bind() became part of the C++11 standard with minor
modifications. Present the standard version as the main one to use, but
list the others as alternatives.

Change-Id: If419d8d24c0925119d3b9f7ff76be44981351bc0
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>

src/concurrent/doc/snippets/code/src_concurrent_qtconcurrentfilter.cpp

@@ -136,7 +136,7 @@ bool QString::contains(const QRegExp &regexp) const;
 
 
 //! [10]
-boost::bind(&QString::contains, QRegExp("^\\S+$")); // matches strings without whitespace
+std::bind(&QString::contains, QRegExp("^\\S+$")); // matches strings without whitespace
 //! [10]
 
 
@@ -147,7 +147,7 @@ bool contains(const QString &string)
 
 //! [12]
 QStringList strings = ...;
-boost::bind(static_cast<bool(QString::*)(const QRegExp&)>( &QString::contains ), QRegExp("..." ));
+std::bind(static_cast<bool(QString::*)(const QRegExp&)>( &QString::contains ), QRegExp("..." ));
 //! [12]
 
 //! [13]

src/concurrent/doc/snippets/code/src_concurrent_qtconcurrentmap.cpp

@@ -149,7 +149,7 @@ QImage QImage::scaledToWidth(int width, Qt::TransformationMode) const;
 
 
 //! [11]
-boost::bind(&QImage::scaledToWidth, 100, Qt::SmoothTransformation)
+std::bind(&QImage::scaledToWidth, 100, Qt::SmoothTransformation)
 //! [11]
 
 
@@ -160,7 +160,7 @@ QImage scaledToWith(const QImage &image)
 
 //! [13]
 QList<QImage> images = ...;
-QFuture<QImage> thumbnails = QtConcurrent::mapped(images, boost::bind(&QImage::scaledToWidth, 100 Qt::SmoothTransformation));
+QFuture<QImage> thumbnails = QtConcurrent::mapped(images, std::bind(&QImage::scaledToWidth, 100 Qt::SmoothTransformation));
 //! [13]
 
 //! [14]

src/concurrent/doc/snippets/code/src_concurrent_qtconcurrentrun.cpp

@@ -93,6 +93,6 @@ future.waitForFinished();
 
 //! [6]
 void someFunction(int arg1, double arg2);
-QFuture<void> future = QtConcurrent::run(boost::bind(someFunction, 1, 2.0));
+QFuture<void> future = QtConcurrent::run(std::bind(someFunction, 1, 2.0));
 ...
 //! [6]

src/concurrent/qtconcurrentfilter.cpp

@@ -155,15 +155,11 @@
 
     \section2 Using Bound Function Arguments
 
-    Note that Qt does not provide support for bound functions. This is
-    provided by 3rd party libraries like
-    \l{http://www.boost.org/libs/bind/bind.html}{Boost} or
-    \l{http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf}
-    {C++ TR1 Library Extensions}.
-
     If you want to use a filter function takes more than one argument, you can
-    use boost::bind() or std::tr1::bind() to transform it onto a function that
-    takes one argument.
+    use std::bind() to transform it onto a function that takes one argument. If
+    C++11 support is not available, \l{http://www.boost.org/libs/bind/bind.html}
+    {boost::bind()} or \l{http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf}
+    {std::tr1::bind()} are suitable replacements.
 
     As an example, we use QString::contains():
 
@@ -177,7 +173,7 @@
 
     \snippet code/src_concurrent_qtconcurrentfilter.cpp 10
 
-    The return value from boost::bind() is a function object (functor) with
+    The return value from std::bind() is a function object (functor) with
     the following signature:
 
     \snippet code/src_concurrent_qtconcurrentfilter.cpp 11

src/concurrent/qtconcurrentmap.cpp

@@ -204,15 +204,11 @@
 
     \section2 Using Bound Function Arguments
 
-    Note that Qt does not provide support for bound functions. This is
-    provided by 3rd party libraries like
-    \l{http://www.boost.org/libs/bind/bind.html}{Boost} or
-    \l{http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf}{C++
-    TR1 Library Extensions}.
-
     If you want to use a map function that takes more than one argument you can
-    use boost::bind() or std::tr1::bind() to transform it onto a function that
-    takes one argument.
+    use std::bind() to transform it onto a function that takes one argument. If
+    C++11 support is not available, \l{http://www.boost.org/libs/bind/bind.html}
+    {boost::bind()} or \l{http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf}
+    {std::tr1::bind()} are suitable replacements.
 
     As an example, we'll use QImage::scaledToWidth():
 
@@ -226,7 +222,7 @@
 
     \snippet code/src_concurrent_qtconcurrentmap.cpp 11
 
-    The return value from boost::bind() is a function object (functor) with
+    The return value from std::bind() is a function object (functor) with
     the following signature:
 
     \snippet code/src_concurrent_qtconcurrentmap.cpp 12

src/concurrent/qtconcurrentrun.cpp

@@ -110,15 +110,12 @@
 
     \section2 Using Bound Function Arguments
 
-    Note that Qt does not provide support for bound functions. This is
-    provided by 3rd party libraries like
-    \l{http://www.boost.org/libs/bind/bind.html}{Boost} or
-    \l{http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf}
-    {C++ TR1 Library Extensions}.
+    You can use std::bind() to \e bind a number of arguments to a function when
+    called. If C++11 support is not available, \l{http://www.boost.org/libs/bind/bind.html}
+    {boost::bind()} or \l{http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf}
+    {std::tr1::bind()} are suitable replacements.
 
-    You can use boost::bind() or std::tr1::bind() to \e bind a number of
-    arguments to a function when called. There are number of reasons for doing
-    this:
+    There are number of reasons for binding:
 
     \list
     \li To call a function that takes more than 5 arguments.