add ScopeGuard example

git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@399 7ec92016-0320-0410-acc4-a06ded1c099a

test/Makefile

@@ -8,6 +8,7 @@ SUBTARGETS	= \
 		sub-OrderedStatic \
 		sub-RegressionTest \
 		sub-SafeFormat \
+		sub-ScopeGuard \
 		sub-Singleton \
 		sub-SmallObj \
 		sub-Visitor
@@ -45,6 +46,11 @@ sub-SafeFormat: FORCE
 	$(MAKE) -f $(MAKEFILE)
 	@cd ..
 
+sub-ScopeGuard: FORCE
+	cd ScopeGuard && \
+	$(MAKE) -f $(MAKEFILE)
+	@cd ..
+	
 sub-Singleton: FORCE
 	cd Singleton && \
 	$(MAKE) -f $(MAKEFILE)-DeletableSingleton && \
@@ -86,6 +92,9 @@ clean:
 	cd SmallObj && \
 	$(MAKE) -f $(MAKEFILE) clean
 	@cd ..
+	cd ScopeGuard && \
+	$(MAKE) -f $(MAKEFILE) clean
+	@cd ..
 	cd Singleton && \
 	$(MAKE) -f $(MAKEFILE)-DeletableSingleton clean && \
 	$(MAKE) -f $(MAKEFILE)-Phoenix clean && \

test/ScopeGuard/Makefile

@@ -0,0 +1,32 @@
+
+
+CPP = g++
+CC = gcc
+OBJ = main.o 
+LINKOBJ = main.o 
+CXXINCS = -I./../../include -I.
+LIBS = -L../../lib -lloki
+CXXFLAGS = $(CXXINCS) -O2 -DNDEBUG 
+BIN = main-gcc.exe
+RM = rm -f
+CHK_DIR_EXISTS= if not exist
+MKDIR = mkdir
+
+.PHONY: all all-before all-after clean clean-custom
+
+all: all-before $(BIN) all-after
+
+
+clean: clean-custom
+	${RM} $(OBJ) $(BIN)
+
+$(BIN): $(OBJ)
+	$(CPP) $(LINKOBJ) -o main-gcc.exe $(LIBS)
+
+check_tmp: 
+	@$(CHK_DIR_EXISTS) "" $(MKDIR) "tmp"
+	
+main.o: main.cpp
+	$(CPP) -c main.cpp -o main.o $(CXXFLAGS)
+
+

test/ScopeGuard/main.cpp

@@ -0,0 +1,87 @@
+////////////////////////////////////////////////////////////////////////////////
+// The Loki Library
+// Copyright (c) 2006 Peter Kümmel
+// Permission to use, copy, modify, distribute and sell this software for any 
+//     purpose is hereby granted without fee, provided that the above copyright 
+//     notice appear in all copies and that both that copyright notice and this 
+//     permission notice appear in supporting documentation.
+// The author makes no representations about the 
+//     suitability of this software for any purpose. It is provided "as is" 
+//     without express or implied warranty.
+////////////////////////////////////////////////////////////////////////////////
+
+// $Header:
+
+
+
+#include <loki/ScopeGuard.h>
+#include <vector>
+#include <string>
+#include <iostream>
+
+struct UserDatabase
+{
+	void AddFriend(const std::string&, const std::string&)
+	{
+		throw 55;
+	}
+};
+
+class User
+{
+public:
+	User(UserDatabase* db) : pDB_(db){}
+
+	std::string GetName();
+
+    void AddFriend(User& newFriend);
+	void AddFriendGuarded(User& newFriend);
+
+	size_t countFriends();
+
+private:
+	typedef std::vector<User*> UserCont;
+    UserCont friends_;
+    UserDatabase* pDB_;
+};
+
+std::string User::GetName()
+{
+	return "A name";
+}
+
+size_t User::countFriends()
+{
+	return friends_.size();
+}
+
+void User::AddFriend(User& newFriend)
+{
+    friends_.push_back(&newFriend);
+    pDB_->AddFriend(GetName(), newFriend.GetName());
+}
+
+void User::AddFriendGuarded(User& newFriend)
+{
+    friends_.push_back(&newFriend);
+	Loki::ScopeGuard guard = Loki::MakeObjGuard(friends_, &UserCont::pop_back);
+    pDB_->AddFriend(GetName(), newFriend.GetName());
+    guard.Dismiss();
+}
+
+
+int main()
+{
+	UserDatabase db;
+
+	User u1(&db);
+	User u2(&db);
+
+	try{ u1.AddFriend(u2); }
+    catch (...){}
+	std::cout << "u1 countFriends: " << u1.countFriends() << "\n";
+
+	try{ u2.AddFriendGuarded(u1); }
+    catch (...){}
+	std::cout << "u2 countFriends: " << u2.countFriends() << "\n";
+}

test/ScopeGuard/make.msvc.bat

@@ -0,0 +1,6 @@
+if not exist tmp\ mkdir tmp
+
+cl -c -Zm200 -O2 -DNDEBUG -MT -EHsc -GR -W0 -wd4710 -I"." -I"..\..\include" -Fotmp\ main.cpp 
+
+link /NOLOGO /SUBSYSTEM:CONSOLE /incremental:no /OUT:"main-msvc.exe" ..\..\lib\loki.lib tmp\main.obj
+

test/make.msvc.bat

@@ -23,6 +23,10 @@ cd SafeFormat
 call make.msvc.bat
 cd ..
 
+cd ScopeGuard
+call make.msvc.bat
+cd ..
+
 cd Singleton
 call make.msvc.bat
 cd ..