Opening dataset is done in actions

actions/actiongenintfile.h

@@ -11,6 +11,9 @@ ADD_ACTION(GenIntFile, genintfile, ReadIsGrid<Source>);
 
 template<class D> MString ActionGenIntFile::DoAction(const CLArgs& args, D& ds)
 {
+ auto resop = ds.Open(args);
+ if(resop.Exist()) return "Can't open source: " + resop;
+
  michlib_internal::ParameterListEx pars;
  pars.UsePrefix("");
  pars.SetParameter("source", args.at("source"));

actions/actioninfo.h

@@ -6,8 +6,10 @@ using michlib::message;
 
 ADD_ACTION(Info, info, InfoSupported<Source>);
 
-template<class D> MString ActionInfo::DoAction([[maybe_unused]] const CLArgs& args, D& data)
+template<class D> MString ActionInfo::DoAction(const CLArgs& args, D& data)
 {
+ auto resop = data.Open(args);
+ if(resop.Exist()) return "Can't open source: " + resop;
  auto info = data.Info();
  if(!info.Exist()) return "No info";
  message(info);

actions/actiontsc.h

@@ -9,6 +9,9 @@ ADD_ACTION(TSC, tsc, ReadPSupported<Source> || ReadSupported<Source>);
 
 template<class D> MString ActionTSC::DoAction(const CLArgs& args, D& ds)
 {
+ auto resop = ds.Open(args);
+ if(resop.Exist()) return "Can't open source: " + resop;
+
  michlib_internal::ParameterListEx pars;
  pars.UsePrefix("");
  pars.SetParameter("source", args.at("source"));

actions/actionuv.h

@@ -1,6 +1,6 @@
 #pragma once
-#include "actiondep.h"
 #include "BFileW.h"
+#include "actiondep.h"
 #include <memory>
 
 using michlib::BFileW;
@@ -9,6 +9,9 @@ ADD_ACTION(UV, uv, ReadPSupported<Source> || ReadSupported<Source>);
 
 template<class D> MString ActionUV::DoAction(const CLArgs& args, D& ds)
 {
+ auto resop = ds.Open(args);
+ if(resop.Exist()) return "Can't open source: " + resop;
+
  michlib_internal::ParameterListEx pars;
  pars.UsePrefix("");
  pars.SetParameter("source", args.at("source"));

src/data.cpp

@@ -8,7 +8,5 @@ MString Data::Init(const CLArgs& args)
 
  bool res = internal::InitV(*this, src);
  if(!res) return "Unknown source: " + src;
- auto resop = std::visit([&args = std::as_const(args)](auto& data) -> auto { return data.Open(args); }, *this);
- if(resop.Exist()) return "Can't open source " + src + ":\n" + resop;
  return "";
 }