Let the constructor for std::string do its job

include/cantera/equil/MultiPhaseEquil.h

@@ -67,7 +67,7 @@ public:
     doublereal error();
 
     std::string reactionString(size_t j) {
-        return std::string("");
+        return "";
     }
     void setInitialMixMoles(int loglevel = 0) {
         setInitialMoles(loglevel);

include/cantera/kinetics/ReactionPath.h

@@ -26,7 +26,7 @@ class SpeciesNode
 {
 public:
     /// Default constructor
-    SpeciesNode() : number(npos), name(""), value(0.0),
+    SpeciesNode() : number(npos), value(0.0),
         visible(false), m_in(0.0), m_out(0.0) {}
 
     /// Destructor

include/cantera/numerics/RootFind.h

@@ -410,8 +410,7 @@ protected:
             foundNeg(0),
             deltaXConverged(-1.0E300),
             deltaFConverged(-1.0E300),
-            delX(-1.0E300),
-            reasoning("") {
+            delX(-1.0E300) {
         };
         //@}
     };

include/cantera/oneD/Domain1D.h

@@ -54,7 +54,6 @@ public:
         m_jstart(0),
         m_left(0),
         m_right(0),
-        m_id(""), m_desc(""),
         m_bw(-1) {
         resize(nv, points);
     }

samples/cxx/bvp/BoundaryValueProblem.h

@@ -38,7 +38,7 @@ public:
      * Constructor. Sets default values.
      */
     Component() : lower(0.0), upper(1.0), rtol(1.0e-9), atol(1.0e-12),
-        refine(true), name("") {}
+        refine(true) {}
 };
 
 /**

src/base/xml.cpp

@@ -433,7 +433,7 @@ std::string XML_Node::id() const
     if (hasAttrib("id")) {
         return attrib("id");
     }
-    return std::string("");
+    return "";
 }
 
 void XML_Node::addValue(const std::string& val)

src/equil/vcs_solve.cpp

@@ -139,8 +139,8 @@ void VCS_SOLVE::vcs_initSizes(const size_t nspecies0, const size_t nelements,
     m_SSPhase.resize(2*nspecies0, 0);
     m_phaseID.resize(nspecies0, 0);
     m_numElemConstraints = nelements;
-    m_elementName.resize(nelements, std::string(""));
-    m_speciesName.resize(nspecies0, std::string(""));
+    m_elementName.resize(nelements);
+    m_speciesName.resize(nspecies0);
     m_elType.resize(nelements, VCS_ELEM_TYPE_ABSPOS);
     m_elementActive.resize(nelements, 1);