replace const string& by string_view in Flags and SymbolTable

libsrc/core/flags.cpp

@@ -16,6 +16,7 @@
 namespace ngcore
 {
   using std::string;
+  using std::string_view;
   using std::endl;
   Flags :: Flags () { ; }
 
@@ -209,18 +210,18 @@ namespace ngcore
   }
 
 
-  double Flags :: GetNumFlag (const string & name, double def) const
+  double Flags :: GetNumFlag (string_view name, double def) const
   {
     if (numflags.Used (name))
-      return numflags[name];
+      return numflags[string(name)];
     else
       return def;
   }
   
-  const double * Flags :: GetNumFlagPtr (const string & name) const
+  const double * Flags :: GetNumFlagPtr (string_view name) const
   {
     if (numflags.Used (name))
-      return & ((SymbolTable<double>&)numflags)[name];
+      return & ((SymbolTable<double>&)numflags)[string(name)];
     else
       return NULL;
   }
@@ -239,16 +240,16 @@ namespace ngcore
     return defflags.Used (name);
   }
   */
-  bool Flags :: GetDefineFlag (const string & name) const throw()
+  bool Flags :: GetDefineFlag (string_view name) const throw()
   {
-    if (!defflags.Used (name)) return false;
+    if (!defflags.Used (string(name))) return false;
-    return defflags[name];
+    return defflags[string(name)];
   }
 
-  xbool Flags :: GetDefineFlagX (const string & name) const throw()
+  xbool Flags :: GetDefineFlagX (string_view name) const throw()
   {
-    if (!defflags.Used (name)) return maybe;
+    if (!defflags.Used (string(name))) return maybe;
-    return bool(defflags[name]);
+    return bool(defflags[string(name)]);
   }
 
 
@@ -296,32 +297,32 @@ namespace ngcore
     return empty;
   }
 
-  bool Flags :: StringFlagDefined (const string & name) const
+  bool Flags :: StringFlagDefined (string_view name) const noexcept
   {
     return strflags.Used (name);
   }
 
-  bool Flags :: NumFlagDefined (const string &name) const
+  bool Flags :: NumFlagDefined (string_view name) const noexcept
   {
     return numflags.Used (name);
   }
 
-  bool Flags :: FlagsFlagDefined (const string &name) const
+  bool Flags :: FlagsFlagDefined (string_view name) const noexcept
   {
     return flaglistflags.Used (name);
   }
   
-  bool Flags :: StringListFlagDefined (const string & name) const
+  bool Flags :: StringListFlagDefined (string_view name) const noexcept
   {
     return strlistflags.Used (name);
   }
 
-  bool Flags :: NumListFlagDefined (const string & name) const
+  bool Flags :: NumListFlagDefined (string_view name) const noexcept
   {
     return numlistflags.Used (name);
   }
 
-  bool Flags :: AnyFlagDefined (const string& name) const
+  bool Flags :: AnyFlagDefined (string_view name) const noexcept
   {
     return anyflags.Used(name);
   }

libsrc/core/flags.hpp

@@ -125,15 +125,15 @@ namespace ngcore
     /// Returns std::string flag, default value if not exists
     std::string GetStringFlag (const std::string & name, std::string def = "") const;
     /// Returns numerical flag, default value if not exists
-    double GetNumFlag (const std::string & name, double def) const;
+    double GetNumFlag (std::string_view name, double def) const;
     /// Returns address of numerical flag, null if not exists
-    const double * GetNumFlagPtr (const std::string & name) const;
+    const double * GetNumFlagPtr (std::string_view name) const;
     /// Returns address of numerical flag, null if not exists
     double * GetNumFlagPtr (const std::string & name);
     /// Returns boolean flag
     // int GetDefineFlag (const char * name) const;
-    bool GetDefineFlag (const std::string & name) const throw();
+    bool GetDefineFlag (std::string_view name) const  noexcept;
-    xbool GetDefineFlagX (const std::string & name) const throw();
+    xbool GetDefineFlagX (std::string_view name) const  noexcept;
     /// Returns string list flag, empty array if not exist
     const Array<std::string> & GetStringListFlag (const std::string & name) const;
     /// Returns num list flag, empty array if not exist
@@ -144,16 +144,16 @@ namespace ngcore
 
 
     /// Test, if string flag is defined
-    bool StringFlagDefined (const std::string & name) const;
+    bool StringFlagDefined (std::string_view name) const noexcept;
     /// Test, if num flag is defined
-    bool NumFlagDefined (const std::string & name) const;
+    bool NumFlagDefined (std::string_view name) const noexcept;
     /// Test, if num flag is defined
-    bool FlagsFlagDefined (const std::string & name) const;
+    bool FlagsFlagDefined (std::string_view name) const noexcept;
     /// Test, if string list flag is defined
-    bool StringListFlagDefined (const std::string & name) const;
+    bool StringListFlagDefined (std::string_view name) const noexcept;
     /// Test, if num list flag is defined
-    bool NumListFlagDefined (const std::string & name) const;
+    bool NumListFlagDefined (std::string_view name) const noexcept;
-    bool AnyFlagDefined (const std::string& name) const;
+    bool AnyFlagDefined (std::string_view name) const noexcept;
 
     /// number of string flags
     int GetNStringFlags () const { return strflags.Size(); }

libsrc/core/symboltable.hpp

@@ -45,7 +45,7 @@ namespace ngcore
     }
 
     /// INDEX of symbol name, throws exception if unused
-    size_t Index (const std::string & name) const
+    size_t Index (std::string_view name) const
     {
       for (size_t i = 0; i < names.size(); i++)
         if (names[i] == name) return i;
@@ -53,7 +53,7 @@ namespace ngcore
     }
 
     /// Index of symbol name, returns -1 if unused
-    int CheckIndex (const std::string & name) const
+    int CheckIndex (std::string_view name) const
     {
       for (int i = 0; i < names.size(); i++)
         if (names[i] == name) return i;
@@ -67,12 +67,12 @@ namespace ngcore
     }
 
     /// Returns reference to element. exception for unused identifier
-    reference operator[] (const std::string & name)
+    reference operator[] (std::string_view name)
     {
       return data[Index (name)];
     }
 
-    const_reference operator[] (const std::string & name) const
+    const_reference operator[] (std::string_view name) const
     {
       return data[Index (name)];
     }
@@ -99,7 +99,7 @@ namespace ngcore
     }
 
     /// Associates el to the string name, overrides if name is used
-    void Set (const std::string & name, const T & el)
+    void Set (std::string_view name, const T & el)
     {
       int i = CheckIndex (name);
       if (i >= 0)
@@ -107,14 +107,23 @@ namespace ngcore
       else
         {
           data.push_back(el);
-          names.push_back(name);
+          names.push_back(std::string(name));
         }
     }
 
+
+    
+    /*
     bool Used (const std::string & name) const
     {
       return CheckIndex(name) >= 0;
     }
+    */
+    
+    bool Used (std::string_view name) const
+    {
+      return CheckIndex(name) >= 0;
+    }
     
     /// Deletes symboltable
     inline void DeleteAll ()