first "working" version of place::error - compiles and run when Ok

tested with some errors as espected

include/nana/gui/place.hpp

@@ -110,19 +110,7 @@ namespace nana
 			error(	const std::string& what,
 					const place& plc,
 					std::string            field = "unknown",
-				   std::string::size_type pos = std::string::npos)
+					std::string::size_type pos = std::string::npos);
-
-				: std::invalid_argument{ "Place error  " + what 
-				                        + " from widget " + API::window_caption(plc.window_handle()).substr(0,80)
-				                        + " in fleld " + field
-						                + ( pos == std::string::npos ? "" : "at  at position " + std::to_string(pos)  )
-						                + "in div_text:\n" + plc.div()},
-				  base_what    { what }, 
-				  owner_caption{ API::window_caption(plc.window_handle()).substr(0,80) },
-				  field        { field },
-				  div_text     { plc.div() },
-				  pos          { pos }
-			{}
 			std::string base_what;
 			std::string owner_caption;  ///< truncate caption (title) of the "placed" widget
 			std::string div_text;       ///< involved div_text

source/gui/place.cpp

@@ -61,9 +61,11 @@ namespace nana
 					  const tokenizer&      tok)
 
 					: std::invalid_argument{ what + " from tokenizer "  },
-					  pos{static_cast<std::string::size_type>(tok.sp_ - tok.divstr_)}
+					  pos{tok.pos()},
+					  div_str(tok.divstr_)
 				{}	
 				std::string::size_type pos;
+				std::string            div_str;
 		    };
 
 			enum class token
@@ -105,9 +107,9 @@ namespace nana
 				return parameters_;
 			}
 
-			std::size_t pos() const noexcept
+			std::string::size_type pos() const noexcept
 			{
-				return (sp_ - divstr_);
+				return static_cast<std::string::size_type>(sp_ - divstr_);
 			}
 
 			token read()
@@ -227,7 +229,7 @@ namespace nana
 						return token::number;
 					}
 					else
-						throw("invalid character '" + std::string(1, *sp_) + "'", *this);
+						throw error("invalid character '" + std::string(1, *sp_) + "'", *this);
 					break;
 				default:
 					if ('0' <= *sp_ && *sp_ <= '9')
@@ -349,7 +351,7 @@ namespace nana
 					return token::identifier;
 				}
 
-				throw("invalid character '" + std::string(1, *sp_) + "'", *this);
+				throw error("invalid character '" + std::string(1, *sp_) + "'", *this);
 				return token::error;	//Useless, just for syntax correction.
 			}
 		private:
@@ -610,12 +612,15 @@ namespace nana
 		struct error : std::invalid_argument
 		{
 			error(std::string            what,
-				  const implement&      impl)
+				  std::string            field = "unknown",
+			 	  std::string::size_type pos   = std::string::npos)
 
-				: std::invalid_argument{ what + " from implementation " }/*,
+				: std::invalid_argument{ what + " from place implementation " },
-				pos{ static_cast<std::string::size_type>(tok.sp_ - tok.divstr_) }*/
+				  pos{ pos },
+				  field { field.empty() ? "unnamed" : field }
 			{}
 			std::string::size_type pos;
+			std::string            field;
 		};
 		class field_gather;
 		class field_dock;
@@ -2007,11 +2012,11 @@ namespace nana
 				return;
 
 			auto fieldstr = div.substr(bound.first, bound.second - bound.first);
-			_m_remove_attr(fieldstr, "weight");
+			_m_remove_attr(fieldstr, "weight");   /// \todo and higth, width ?
 
 			std::string::size_type tag_pos{ left ? div.find('<', bound.second + 2) : div.rfind('>', bound.first - 2) };
 			if (div.npos == tag_pos)
-				throw place::error("please report an issue: unable to update division " + div, impl_-> );
+				throw place::implement::error("please report an issue: the splitter was unable to update division " + div, name);
 
 			auto other_bound = get_field_boundary(div, tag_pos);
 
@@ -2727,7 +2732,7 @@ namespace nana
 			return static_cast<int>(arg.real());
 
 		const char* pos_strs[] = { "1st", "2nd", "3rd", "4th" };
-		throw std::invalid_argument("nana.place: the type of the " + std::string{pos_strs[pos]} +"th parameter for collapse should be integer.");
+		throw place_parts::tokenizer::error("the type of the " + std::string{pos_strs[pos]} +" parameter for collapse should be integer.", tknizer);
 	}
 
 	//implicitly_started indicates whether the field in div-text starts without < mark. 
@@ -2755,13 +2760,14 @@ namespace nana
 		bool invisible = false;
 
 		token tk = token::eof;
+		try {
 			for (tk = tknizer.read(); (tk != token::eof && tk != token::div_end); tk = tknizer.read())
 			{
 				switch (tk)
 				{
 				case token::dock:
 					if (token::eof != div_type && token::dock != div_type)
-					throw std::invalid_argument("nana.place: conflict of div type at " + std::to_string(tknizer.pos()));
+						throw std::invalid_argument("conflict of div type -expected dock type-");
 
 					div_type = token::dock;
 					break;
@@ -2830,7 +2836,7 @@ namespace nana
 				case token::collapse:
 				{
 					if (tknizer.parameters().size() != 4)
-						throw std::invalid_argument("nana.place: collapse requires 4 parameters.");
+						throw std::invalid_argument("collapse requires 4 parameters");
 
 					::nana::rectangle col{
 						get_parameter(tknizer, 0),
@@ -2926,7 +2932,7 @@ namespace nana
 			}
 
 			if (implicitly_started && (tk == token::div_end))
-			throw std::invalid_argument("nana.place: the div-text ends prematurely at " + std::to_string(tknizer.pos()));
+				throw std::invalid_argument("the div-text ends prematurely");
 
 			field_gather * attached_field = nullptr;
 
@@ -2941,7 +2947,7 @@ namespace nana
 				{
 					//The fields are allowed to have a same name. E.g.
 					//place.div("A <B><C>");
-				//place.modify("A", "<B>");  Here the same name B must be allowed, otherwise it throws runtime error.
+					//place.modify("A", "<B>");  Here the same name B must be allowed, otherwise it throws std::invalid_argument.
 
 					bool allow_same_name = false;
 					if (!ignore_duplicate.empty())
@@ -2960,7 +2966,7 @@ namespace nana
 					}
 
 					if (!allow_same_name)
-					throw std::runtime_error("place, the name '" + name + "' is redefined.");
+						throw std::invalid_argument("redefined field name");
 				}
 			}
 
@@ -2974,7 +2980,7 @@ namespace nana
 
 				for (auto& ch : children)
 					if (ch->weigth_type == unmatch)
-					throw std::invalid_argument("nana.place: unmatch vertical-height/horizontal-width between division '"
+						throw std::invalid_argument("unmatch vertical-height/horizontal-width between division '"
 							+ name + "' and children division '" + ch->name);
 
 				div.reset(new div_arrange(token::vert == div_type, std::move(name), std::move(arrange)));
@@ -3006,7 +3012,7 @@ namespace nana
 				div.reset(new div_switchable(std::move(name), this));
 				break;
 			default:
-			throw std::invalid_argument("nana.place: invalid division type.");
+				throw std::invalid_argument("invalid division type.");
 			}
 			div->weigth_type = weight_type;
 
@@ -3099,7 +3105,25 @@ namespace nana
 			div->visible = !(undisplayed || invisible);
 			div->fit = fit;
 			div->fit_parameters = std::move(fit_parameters);
-
+		}
+		catch (place::error& e) { throw; }
+		catch (       error& e) { throw; }
+		catch (place_parts::tokenizer::error& e)
+		{
+			throw error(e.what(), name, e.pos);
+		}
+		catch (std::invalid_argument& e)
+		{
+			throw error(e.what(), name, tknizer.pos());
+		}
+		catch (std::exception& e)
+		{
+			throw error(std::string{"unexpected error: "}+e.what(), name, tknizer.pos());
+		}
+		catch (...)
+		{
+			throw error("unknow error", name, tknizer.pos());
+		}
 		return div;
 	}
 
@@ -3264,17 +3288,21 @@ namespace nana
 	}
 
 	void place::div(std::string div_text)
+	{
+		try
 		{
 			place_parts::tokenizer tknizer(div_text.c_str());
 			impl_->disconnect();
 			auto div = impl_->scan_div(tknizer, true);
-		try
-		{
 			impl_->connect(div.get());		//throws if there is a redefined name of field.
 			impl_->root_division.reset();	//clear attachments div-fields
 			impl_->root_division.swap(div);
 			impl_->div_text.swap(div_text);
 		}
+		catch (place::implement::error & e)
+		{
+			throw place::error("failed to set div('"+div_text+"'): " + e.what(), *this, e.field, e.pos);
+		}
 		catch (...) // tokenizer error
 		{
 			//redefined a name of field
@@ -3295,19 +3323,15 @@ namespace nana
 	void place::modify(const char* name, const char* div_text)
 	{
 		if (nullptr == div_text)
-			throw error("nana::place.modify(): invalid div-text (nullptr)", *this);
+			throw error("modify(): invalid div-text (=nullptr)", *this);
 
 		if (! valid_field_name(name) )
-			throw badname("nana::place.modify()", *this, name);
+			throw badname("modify()", *this, name);
 
 		auto div_ptr = impl_->search_div_name(impl_->root_division.get(), name);
 		if (!div_ptr)
-		{
+		   throw error("modify(): field was not found", *this, name);
-			std::string what = "nana::place.modify(): field '";
+		
-			what += name;
-			what += "' was not found.";
-			throw error(what, *this, name);
-		}
 
 		std::unique_ptr<implement::division>* replaced = nullptr;
 
@@ -3361,17 +3385,22 @@ namespace nana
 				}
 			}
 		}
-		catch (...)            /// todo throw error   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+		catch (std::exception&e)        
 		{
 			replaced->swap(impl_->tmp_replaced);
-			throw;
+			throw error( std::string("modify()")+e.what(), *this, name);
+		}
+		catch (...)           
+		{
+			replaced->swap(impl_->tmp_replaced);
+			throw error("modify() unknonw error", *this, name);
 		}
 	}
 
 	place::field_reference place::field(const char* name)
 	{
 		if (!valid_field_name(name))
-			throw badname("nana::place.field()", *this, name);
+			throw badname("field()", *this, name);
 
 		//get the field with the specified name. If no such field with specified name
 		//then create one.
@@ -3387,8 +3416,7 @@ namespace nana
 			if (div)
 			{
 				if (div->field && (div->field != p))
-					throw error(std::string("nana::place.field(): unexpected error, the division attaches an unexpected field: ") + name,
+					throw error("field(): the division attaches an unexpected field", *this, name);
-						        *this, name);
 
 				div->field = p;
 				p->attached = div;
@@ -3466,7 +3494,7 @@ namespace nana
 	void place::field_visible(const char* name, bool vsb)
 	{
 		if (!valid_field_name(name))
-			throw badname("set nana::place.field_visible()", *this, name);
+			throw badname("field_visible()", *this, name);
 
 		auto div = impl_->search_div_name(impl_->root_division.get(), name);
 		if (div)
@@ -3479,7 +3507,7 @@ namespace nana
 	bool place::field_visible(const char* name) const
 	{
 		if (!valid_field_name(name))
-			throw badname("get nana::place.field_visible()", *this, name);
+			throw badname("field_visible()", *this, name);
 
 		auto div = impl_->search_div_name(impl_->root_division.get(), name);
 		return (div && div->visible);
@@ -3488,7 +3516,7 @@ namespace nana
 	void place::field_display(const char* name, bool dsp)
 	{
 		if (!valid_field_name(name))
-			throw badname("set nana::place.field_display()", *this, name);
+			throw badname("field_display()", *this, name);
 
 		auto div = impl_->search_div_name(impl_->root_division.get(), name);
 		if (div)
@@ -3502,7 +3530,7 @@ namespace nana
 	bool place::field_display(const char* name) const
 	{
 		if (!valid_field_name(name))
-			throw badname("get nana::place.field_display()", *this, name);
+			throw badname("field_display()", *this, name);
 
 		auto div = impl_->search_div_name(impl_->root_division.get(), name);
 		return (div && div->display);
@@ -3540,7 +3568,7 @@ namespace nana
 	place& place::dock(const std::string& name, std::string factory_name, std::function<std::unique_ptr<widget>(window)> factory)
 	{
 		if (!valid_field_name(name.data()))
-			throw badname("get nana::place.field_display()", *this, name.data());
+			throw badname("dock()", *this, name.data());
 
 		auto & dock_ptr = impl_->docks[name];
 		if (!dock_ptr)
@@ -3550,7 +3578,7 @@ namespace nana
 		if (!factory_name.empty())
 		{
 			if (impl_->dock_factoris.find(factory_name) != impl_->dock_factoris.end())
-				throw std::invalid_argument("nana::place - the specified factory name(" + factory_name + ") already exists");
+				throw error("dock() - the specified factory name(" + factory_name + ") already exists", *this, name);
 
 			impl_->dock_factoris[factory_name] = dock_ptr;
 			dock_ptr->factories[factory_name] = std::move(factory);
@@ -3586,7 +3614,7 @@ namespace nana
 	{
 		auto i = impl_->dock_factoris.find(factory);
 		if (i == impl_->dock_factoris.end())
-			throw std::invalid_argument("invalid factory name(" + factory + ") of dockpane");
+			throw std::invalid_argument("nana::place::dock_create - invalid factory name(" + factory + ") of dockpane");
 
 		auto dock_ptr = i->second;
 		if (dock_ptr->attached)
@@ -3607,9 +3635,24 @@ namespace nana
 
 		return nullptr;
 	}
-	//end class place
 	
-	//class place::error
+	place::error::error(const std::string& what,
+						const place& plc,
+						std::string field,
+						std::string::size_type pos)
+
+		: std::invalid_argument{ "nana::place error  " + what
+								+ " from widget '" + API::window_caption(plc.window_handle()).substr(0,80)
+								+ "' in fleld '" + field
+								+ (pos == std::string::npos ? "' " : "' at  at position " + std::to_string(pos))
+								+ " in div_text:\n" + plc.div() },
+		base_what{ what },
+		owner_caption{ API::window_caption(plc.window_handle()).substr(0,80) },
+		field{ field },
+		div_text{ plc.div() },
+		pos{ pos }
+	{}
+	//end class place
 
 }//end namespace nana