Use .empty() instead of .size()==0.

git-svn-id: https://svn.dealii.org/trunk@20764 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/deal.II/source/numerics/histogram.cc b/deal.II/deal.II/source/numerics/histogram.cc
index b510fd8a23478af27872be06b2ad1c29f0ae8c90..e0aab40a28fa22a7df0dce565bbbbc77563928ff 100644 (file)
--- a/deal.II/deal.II/source/numerics/histogram.cc
+++ b/deal.II/deal.II/source/numerics/histogram.cc
@@ -2,7 +2,7 @@
 //    $Id$
 //    Version: $Name$
 //
-//    Copyright (C) 1999, 2000, 2001, 2002, 2003, 2005, 2006 by the deal.II authors
+//    Copyright (C) 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2010 by the deal.II authors
 //
 //    This file is subject to QPL and may not be  distributed
 //    without copyright and license information. Please refer
@@ -65,7 +65,7 @@ void Histogram::evaluate (const std::vector<Vector<number> > &values,
 
                                   // store y_values
   y_values = y_values_;
-  
+
                                   // first find minimum and maximum value
                                   // in the indicators
   number min_value=0, max_value=0;
@@ -77,7 +77,7 @@ void Histogram::evaluate (const std::vector<Vector<number> > &values,
                                      values[0].end());
        max_value = *std::max_element(values[0].begin(),
                                      values[0].end());
-       
+
        for (unsigned int i=1; i<values.size(); ++i)
          {
            min_value = std::min (min_value,
@@ -87,24 +87,24 @@ void Histogram::evaluate (const std::vector<Vector<number> > &values,
                                  *std::max_element(values[i].begin(),
                                                    values[i].end()));
          };
-       
+
        break;
       };
-       
+
       case logarithmic:
       {
        typedef bool (*comparator) (const number, const number);
        const comparator logarithmic_less_function
          = &Histogram::template logarithmic_less<number>;
-       
+
        min_value = *std::min_element(values[0].begin(),
                                      values[0].end(),
                                      logarithmic_less_function);
-       
+
        max_value = *std::max_element(values[0].begin(),
                                      values[0].end(),
                                      logarithmic_less_function);
-       
+
        for (unsigned int i=1; i<values.size(); ++i)
          {
            min_value = std::min (min_value,
@@ -112,17 +112,17 @@ void Histogram::evaluate (const std::vector<Vector<number> > &values,
                                                    values[i].end(),
                                                    logarithmic_less_function),
                                  logarithmic_less_function);
-           
+
            max_value = std::max (max_value,
                                  *std::max_element(values[i].begin(),
                                                    values[i].end(),
                                                    logarithmic_less_function),
                                  logarithmic_less_function);
          };
-       
+
        break;
       };
-       
+
       default:
            Assert (false, ExcInternalError());
     };
@@ -145,7 +145,7 @@ void Histogram::evaluate (const std::vector<Vector<number> > &values,
                                   // for the other data vectors by
                                   // copying
   intervals.push_back (std::vector<Interval>());
-  
+
   switch (interval_spacing)
     {
       case linear:
@@ -166,7 +166,7 @@ void Histogram::evaluate (const std::vector<Vector<number> > &values,
        for (unsigned int n=0; n<n_intervals; ++n)
          intervals[0].push_back (Interval(std::exp(std::log(min_value)+n*delta),
                                           std::exp(std::log(min_value)+(n+1)*delta)));
-       
+
        break;
       };
 
@@ -204,7 +204,7 @@ void Histogram::evaluate (const std::vector<Vector<number> > &values,
 template <typename number>
 void Histogram::evaluate (const Vector<number>    &values,
                          const unsigned int       n_intervals,
-                         const IntervalSpacing    interval_spacing) 
+                         const IntervalSpacing    interval_spacing)
 {
   std::vector<Vector<number> > values_list (1,
                                       values);
@@ -216,7 +216,7 @@ void Histogram::evaluate (const Vector<number>    &values,
 void Histogram::write_gnuplot (std::ostream &out) const
 {
   AssertThrow (out, ExcIO());
-  Assert (intervals.size() > 0, ExcEmptyData());
+  Assert (!intervals.empty(), ExcEmptyData());
 
                                   // do a simple 2d plot, if only
                                   // one data set is available
@@ -275,9 +275,9 @@ void Histogram::write_gnuplot (std::ostream &out) const
              << ' '
              << intervals[i][n].content
              << std::endl;
-       
+
        out << std::endl;
-       
+
       };
 
   AssertThrow (out, ExcIO());
@@ -285,7 +285,7 @@ void Histogram::write_gnuplot (std::ostream &out) const
 
 
 
-std::string Histogram::get_interval_spacing_names () 
+std::string Histogram::get_interval_spacing_names ()
 {
   return "linear|logarithmic";
 }
@@ -322,7 +322,7 @@ Histogram::memory_consumption () const
 // explicit instantiations for float
 template
 void Histogram::evaluate<float> (const std::vector<Vector<float> > &values,
-                                const std::vector<double>                  &y_values, 
+                                const std::vector<double>                  &y_values,
                                 const unsigned int                          n_intervals,
                                 const IntervalSpacing                       interval_spacing);
 template
@@ -334,7 +334,7 @@ void Histogram::evaluate<float> (const Vector<float>   &values,
 // explicit instantiations for double
 template
 void Histogram::evaluate<double> (const std::vector<Vector<double> >  &values,
-                                 const std::vector<double>                    &y_values, 
+                                 const std::vector<double>                    &y_values,
                                  const unsigned int                            n_intervals,
                                  const IntervalSpacing                         interval_spacing);
 template