utils: add name methods for Scalar types

CMakeLists.txt

@@ -71,6 +71,10 @@ SEARCH_FOR_BOOST()
 # ----------------------------------------------------
 # --- INCLUDE ----------------------------------------
 # ----------------------------------------------------
+SET(${PROJECT_NAME}_UTILS_HEADERS
+  include/eigenpy/utils/scalar-name.hpp
+  )
+
 SET(${PROJECT_NAME}_SOLVERS_HEADERS
   include/eigenpy/solvers/solvers.hpp
   include/eigenpy/solvers/preconditioners.hpp
@@ -83,6 +87,7 @@ SET(${PROJECT_NAME}_SOLVERS_HEADERS
   )
 
 SET(${PROJECT_NAME}_HEADERS
+  ${${PROJECT_NAME}_UTILS_HEADERS}
   ${${PROJECT_NAME}_SOLVERS_HEADERS}
   include/eigenpy/computation-info.hpp
   include/eigenpy/eigenpy.hpp

include/eigenpy/utils/scalar-name.hpp

+/*
+* Copyright 2020 INRIA
+*/
+
+#ifndef __eigenpy_utils_scalar_name_hpp__
+#define __eigenpy_utils_scalar_name_hpp__
+
+#include <string>
+#include <complex>
+
+namespace eigenpy
+{
+  template<typename Scalar>
+  struct scalar_name
+  {
+    static std::string shortname();
+  };
+
+  template<>
+  struct scalar_name<float>
+  {
+    static std::string shortname() { return "f"; };
+  };
+
+  template<>
+  struct scalar_name<double>
+  {
+    static std::string shortname() { return "d"; };
+  };
+
+  template<>
+  struct scalar_name<long double>
+  {
+    static std::string shortname() { return "ld"; };
+  };
+
+  template<typename Scalar>
+  struct scalar_name< std::complex<Scalar> >
+  {
+    static std::string shortname() { return "c" + scalar_name<Scalar>(); };
+  };
+}
+
+#endif // ifndef __eigenpy_utils_scalar_name_hpp__