implement empty() function as supported by STL containers

FlexibleSUSY · Aug 25, 2016 · ccf73ef · ccf73ef
1 parent ac2fd67
commit ccf73ef
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Showing 3 changed files with 14 additions and 0 deletions.
diff --git a/src/gsl_vector.cpp b/src/gsl_vector.cpp
@@ -89,6 +89,11 @@ void GSL_vector::assign(const gsl_vector* other)
    gsl_vector_memcpy(vec, other);
 }
 
+bool GSL_vector::empty() const
+{
+   return size() == 0;
+}
+
 const GSL_vector& GSL_vector::operator=(const GSL_vector& rhs)
 {
    if (this != &rhs)

diff --git a/src/gsl_vector.hpp b/src/gsl_vector.hpp
@@ -39,6 +39,7 @@ class GSL_vector {
    double operator[](std::size_t) const; ///< element read access
 
    void assign(const gsl_vector*); ///< assign from gsl_vector
+   bool empty() const;             ///< check if empty
    const gsl_vector* raw() const;  ///< get raw pointer
    gsl_vector* raw();              ///< get raw pointer
    void set_all(double);           ///< set all elemets to same value

diff --git a/test/test_gsl_vector.cpp b/test/test_gsl_vector.cpp
@@ -169,6 +169,14 @@ BOOST_AUTO_TEST_CASE( test_move_assign_chain )
    BOOST_CHECK_EQUAL(v3[2], 3.);
 }
 
+BOOST_AUTO_TEST_CASE( test_empty )
+{
+   GSL_vector v(3), v2;
+
+   BOOST_CHECK(!v.empty());
+   BOOST_CHECK(v2.empty());
+}
+
 BOOST_AUTO_TEST_CASE( test_move )
 {
    GSL_vector v(3);