parameters : small details

- an include missing on OS X
- change serialization in the general case where hdf5 can be used,
  (version of hdf5 high enough) to use only one buffer,
  not a buffer per field.
- put back the mpi_param example.

test/triqs/parameters/mpi_param.cpp

@@ -26,12 +26,9 @@ int main(int argc, char* argv[]) {
   P["d"] = 2.7;
   P["s"] = std::string("-14.3");
  }
-/*
- * WITH SERIALIZATION
  std::cout << "Before bcast rank " << world.rank() << " : "  << P << std::endl ;
  boost::mpi::broadcast(world,P,0);
  std::cout << "After bcast rank " << world.rank() << " : "  << P << std::endl ;
-*/
  return 0;
 }
 

triqs/parameters/_field.hpp

@@ -48,7 +48,7 @@ namespace params {
 #define TRIQS_UTIL_OPAQUE_OBJECT_PREDEFINED_CAST                                                                                 \
  (int)(long)(long long)(unsigned int)(unsigned long)(unsigned long long)(double)(bool)(std::string)
 
- // the type actually stored 
+ // the type actually stored
  template <typename T, typename Enable = void> struct storage_t_impl : std::conditional<std::is_integral<T>::value, long, T>{};
  template <typename T> using storage_t = typename storage_t_impl<std::c14::decay_t<T>>::type;
 
@@ -109,14 +109,14 @@ namespace params {
   std::string name_; // for_error_messages
   bool modified = false;
   bool no_default_value = false;
-  
+
   // only parameters will construct _field
   template <typename T>
   _field(T obj, std::string n, bool without_default_value)
      : index(typeid(storage_t<T>)), p(new _data_impl<storage_t<T>>{std::move(obj)}), name_(n), no_default_value(without_default_value) {
    type_names.insert({index, get_triqs_hdf5_data_scheme(storage_t<T>{})});
   }
-  
+
   std::string type_name() const { return type_name(index); }
   static std::string type_name(std::type_index i);
 
@@ -125,8 +125,8 @@ namespace params {
   template <typename T> bool has_type() const { return index == typeid(T); }
 
   public:
-#ifdef TRIQS_SERIALIZATION_WITH_BOOST
+#ifdef TRIQS_SERIALIZATION_WITH_HDF5_IMPOSSIBLE
-  _field() : index(typeid(void)) {} // BREAKS invariant : only used for BOOST serialization.
+  _field() : index(typeid(void)) {} // BREAKS invariant : only used for BOOST serialization failsafe mode.
 #endif
   _field(_field &&c) = default;
   _field(_field const &x) : index(x.index), p(x.p ? x.p->clone() : nullptr), name_(x.name_), modified(x.modified), no_default_value(x.no_default_value) {} // regular type
@@ -137,7 +137,7 @@ namespace params {
   template <typename RHS> _field &operator=(RHS rhs) { // pass by value (sink)
    modified = true;
    using S_t = storage_t<RHS>;
-   if (index != typeid(S_t)) { 
+   if (index != typeid(S_t)) {
     TRIQS_RUNTIME_ERROR << "Field "<< name_<<" is of type "<< type_name(index)<<". I can not put a " << type_name(typeid(S_t)) << " into it.";
    }
    p.reset(new _data_impl<S_t>{std::move(rhs)});
@@ -145,7 +145,7 @@ namespace params {
   }
 
   // rewrite a few cases for practical convenience ...
-  _field &operator=(int rhs) { // a special case where we can correct : int -> double 
+  _field &operator=(int rhs) { // a special case where we can correct : int -> double
    if (index == typeid(double)) return operator=(double(rhs));
    return operator=(long(rhs));// beware infinite loop! Works because int != long ... Clean this ...
   }
@@ -169,7 +169,7 @@ namespace params {
 
   /// Is a modification required for this field
   bool is_modification_required() const { return no_default_value && (!modified); }
- 
+
 #ifdef TRIQS_WITH_PYTHON_SUPPORT
   /// Convertions python <-> C++
   bool from_python_convertible(PyObject *ob) const { return p->from_python_convertible(ob); }
@@ -182,6 +182,7 @@ namespace params {
   BOOST_PP_SEQ_FOR_EACH(CAST_OPERATOR, nil, TRIQS_UTIL_OPAQUE_OBJECT_PREDEFINED_CAST);
 #undef CAST_OPERATOR
 
+#ifdef TRIQS_SERIALIZATION_WITH_HDF5_IMPOSSIBLE
   // ----- Boost serialisation
 
   template <class Archive> void save(Archive &ar, const unsigned int version) const {
@@ -194,6 +195,7 @@ namespace params {
    p->deserialize(s);
   }
   BOOST_SERIALIZATION_SPLIT_MEMBER();
+#endif
 
   friend std::ostream &operator<<(std::ostream &out, _field const &ob) { return ob.p->print(out); }
 

triqs/parameters/parameters.cpp

@@ -4,6 +4,7 @@
 #include <triqs/utility/serialization.hpp>
 #include <algorithm>
 #include <boost/algorithm/string.hpp>
+#include <iomanip>
 
 namespace triqs {
 namespace params {

triqs/parameters/parameters.hpp

@@ -31,14 +31,14 @@ namespace params {
   * DOC to be written.
   *
   * Provide a form for program parameters.
-  * 
+  *
   * Fields of the form can be added with add_field method (only in C++), with a name, a type, a doc, and optionally a default value.
-  * 
+  *
   * They can be retrieved from and put into the form, using the [] operator, in C++ and python.
-  * 
+  *
-  * The data is stored with a strict type checking at runtime, with some type collapse (all integers into a long, 
+  * The data is stored with a strict type checking at runtime, with some type collapse (all integers into a long,
   *  all string, const char * into a std::string, etc).
-  * 
+  *
   * Basic type cast to basic types are provided.
   *
   * The class is boost-serializable and implements hdf5 I/O operations.
@@ -48,9 +48,11 @@ namespace params {
    std::string key;
    _field f;
    std::string doc;
+#ifdef TRIQS_SERIALIZATION_WITH_HDF5_IMPOSSIBLE
    template <class Archive> void serialize(Archive& ar, const unsigned int version) {
     ar& TRIQS_MAKE_NVP("key", key) & TRIQS_MAKE_NVP("f", f) & TRIQS_MAKE_NVP("doc", doc);
    }
+#endif
   };
   using _data_t = std::vector<_data_elem>;
   _data_t _data;
@@ -59,7 +61,23 @@ namespace params {
   _data_t::const_iterator find(std::string const& key) const;
 
   friend class boost::serialization::access;
-  template <class Archive> void serialize(Archive& ar, const unsigned int version) { ar& TRIQS_MAKE_NVP("_data", _data); }
+#ifdef TRIQS_SERIALIZATION_WITH_HDF5_IMPOSSIBLE
+  template <class Archive> void serialize(Archive& ar, const unsigned int version) {
+   ar& TRIQS_MAKE_NVP("_data", _data);
+  }
+#else
+  // do it at once, with one buffer only.
+  template <class Archive> void save(Archive &ar, const unsigned int version) const {
+   std::string s = h5::serialize(*this);
+   ar << TRIQS_MAKE_NVP("seria_str", s);
+  }
+  template <class Archive> void load(Archive &ar, const unsigned int version) {
+   std::string s;
+   ar >> TRIQS_MAKE_NVP("seria_str", s);
+   *this = h5::deserialize<parameters>(s);
+  }
+  BOOST_SERIALIZATION_SPLIT_MEMBER();
+#endif
 
   public:
   parameters();
@@ -88,13 +106,13 @@ namespace params {
   /// Does the form have the key ?
   bool has_key(std::string const& key) const;
 
-  /** 
+  /**
    * Access the parameter key.
    * Key must be a valid key or a TRIQS_RUNTIME_ERROR is thrown.
    */
   _field& operator[](const char * key);
 
-  /** 
+  /**
    * Access the parameter key.
    * Key must be a valid key or a TRIQS_RUNTIME_ERROR is thrown.
    */
@@ -103,14 +121,14 @@ namespace params {
   /// generate help in form of a table of strings containing a list of required and optional parameters
   std::vector<std::vector<std::string>> generate_help(bool with_header = true) const;
 
-  /// help as a string 
+  /// help as a string
   std::string help() const;
 
   /// hdf5
   friend std::string get_triqs_hdf5_data_scheme(parameters const &) { return ""; }
   friend void h5_write(h5::group F, std::string const& subgroup_name, parameters const& p);
   friend void h5_read(h5::group F, std::string const& subgroup_name, parameters& p);
-  
+
   /// Ostream
   friend std::ostream& operator<<(std::ostream& out, parameters const& p);
 

triqs/utility/serialization.hpp

@@ -20,14 +20,14 @@
  ******************************************************************************/
 #pragma once
 
-#if defined(TRIQS_SERIALIZATION_USE_BOOST) or not H5_VERSION_GE(1,8,9)
+#if defined(TRIQS_SERIALIZATION_DO_NOT_USE_HDF5) or not H5_VERSION_GE(1,8,9)
+
+#define TRIQS_SERIALIZATION_WITH_HDF5_IMPOSSIBLE
 #include "./boost_serialization.hpp"
 
-#define TRIQS_SERIALIZATION_WITH_BOOST
 #else 
-#include "../h5/serialization.hpp"
-#define TRIQS_SERIALIZATION_WITH_HDF5
 
+#include "../h5/serialization.hpp"
 namespace triqs { 
  using h5::serialize;
  using h5::deserialize;