[components] Make isGasIdeal and isGasCompressible constexpr

dumux/material/components/air.hh

@@ -99,13 +99,13 @@ public:
     /*!
      * \brief Returns true, the gas phase is assumed to be compressible
      */
-    static bool gasIsCompressible()
+    static constexpr bool gasIsCompressible()
     { return true; }
 
     /*!
      * \brief Returns true, the gas phase is assumed to be ideal
      */
-    static bool gasIsIdeal()
+    static constexpr bool gasIsIdeal()
     { return true; }
 
     /*!

dumux/material/components/brine.hh

@@ -281,13 +281,13 @@ public:
     /*!
      * \brief Returns true if the gas phase is assumed to be ideal
      */
-    static bool gasIsIdeal()
+    static constexpr bool gasIsIdeal()
     { return H2O::gasIsIdeal(); }
 
     /*!
      * \brief Returns true if the gas phase is assumed to be compressible
      */
-    static bool gasIsCompressible()
+    static constexpr bool gasIsCompressible()
     { return H2O::gasIsCompressible(); }
 
     /*!

dumux/material/components/ch4.hh

@@ -95,7 +95,7 @@ public:
     /*!
      * \brief Returns true if the gas phase is assumed to be compressible
      */
-    static bool gasIsCompressible()
+    static constexpr bool gasIsCompressible()
     { return true; }
 
     /*!
@@ -122,7 +122,7 @@ public:
     /*!
      * \brief Returns true if the gas phase is assumed to be ideal
      */
-    static bool gasIsIdeal()
+    static constexpr bool gasIsIdeal()
     { return true; }
 
     /*!

dumux/material/components/h2.hh

@@ -131,13 +131,13 @@ public:
     /*!
      * \brief Returns true if the gas phase is assumed to be compressible
      */
-    static bool gasIsCompressible()
+    static constexpr bool gasIsCompressible()
     { return true; }
 
     /*!
      * \brief Returns true if the gas phase is assumed to be ideal
      */
-    static bool gasIsIdeal()
+    static constexpr bool gasIsIdeal()
     { return true; }
 
     /*!

dumux/material/components/heavyoil.hh

@@ -384,13 +384,13 @@ public:
     /*!
      * \brief Returns true if the gas phase is assumed to be compressible
      */
-    static bool gasIsCompressible()
+    static constexpr bool gasIsCompressible()
     { return true; }
 
     /*!
      * \brief Returns true if the gas phase is assumed to be ideal
      */
-    static bool gasIsIdeal()
+    static constexpr bool gasIsIdeal()
     { return true; }
 
     /*!

dumux/material/components/mesitylene.hh

@@ -258,13 +258,13 @@ public:
     /*!
      * \brief Returns true if the gas phase is assumed to be compressible
      */
-    static bool gasIsCompressible()
+    static constexpr bool gasIsCompressible()
     { return true; }
 
     /*!
      * \brief Returns true if the gas phase is assumed to be ideal
      */
-    static bool gasIsIdeal()
+    static constexpr bool gasIsIdeal()
     { return true; }
 
     /*!

dumux/material/components/n2.hh

@@ -146,13 +146,13 @@ public:
     /*!
      * \brief Returns true if the gas phase is assumed to be compressible
      */
-    static bool gasIsCompressible()
+    static constexpr bool gasIsCompressible()
     { return true; }
 
     /*!
      * \brief Returns true if the gas phase is assumed to be ideal
      */
-    static bool gasIsIdeal()
+    static constexpr bool gasIsIdeal()
     { return true; }
 
     /*!

dumux/material/components/simpleh2o.hh

@@ -235,7 +235,7 @@ public:
     /*!
      * \brief Returns true if the gas phase is assumed to be ideal
      */
-    static bool gasIsIdeal()
+    static constexpr bool gasIsIdeal()
     { return true; }
 
     /*!

dumux/material/components/tabulatedcomponent.hh

@@ -413,7 +413,7 @@ public:
     /*!
      * \brief Returns true if the gas phase is assumed to be compressible
      */
-    static bool gasIsCompressible()
+    static constexpr bool gasIsCompressible()
     { return RawComponent::gasIsCompressible(); }
 
     /*!
@@ -425,7 +425,7 @@ public:
     /*!
      * \brief Returns true if the gas phase is assumed to be ideal
      */
-    static bool gasIsIdeal()
+    static constexpr bool gasIsIdeal()
     { return RawComponent::gasIsIdeal(); }
 
 

dumux/material/components/trichloroethene.hh

@@ -108,7 +108,7 @@ public:
     /*!
      * \brief Returns true if the gas phase is assumed to be compressible
      */
-    static bool gasIsCompressible()
+    static constexpr bool gasIsCompressible()
     { return true; }
 
     /*!
@@ -149,7 +149,7 @@ public:
     /*!
      * \brief Returns true if the gas phase is assumed to be ideal
      */
-    static bool gasIsIdeal()
+    static constexpr bool gasIsIdeal()
     { return true; }
 
     /*!

dumux/material/components/xylene.hh

@@ -304,13 +304,13 @@ public:
     /*!
      * \brief Returns true if the gas phase is assumed to be compressible
      */
-    static bool gasIsCompressible()
+    static constexpr bool gasIsCompressible()
     { return true; }
 
     /*!
      * \brief Returns true if the gas phase is assumed to be ideal
      */
-    static bool gasIsIdeal()
+    static constexpr bool gasIsIdeal()
     { return true; }
 
     /*!