[Boost-commit] svn:boost r57548 - sandbox/filesystem-v3/libs/filesystem/example

Subject: [Boost-commit] svn:boost r57548 - sandbox/filesystem-v3/libs/filesystem/example
From: bdawes_at_[hidden]
Date: 2009-11-10 13:06:29

Author: bemandawes
Date: 2009-11-10 13:06:28 EST (Tue, 10 Nov 2009)
New Revision: 57548
URL: http://svn.boost.org/trac/boost/changeset/57548

Log:
Initial commit
Added:
   sandbox/filesystem-v3/libs/filesystem/example/error_demo.cpp   (contents, props changed)

Added: sandbox/filesystem-v3/libs/filesystem/example/error_demo.cpp
==============================================================================
--- (empty file)
+++ sandbox/filesystem-v3/libs/filesystem/example/error_demo.cpp	2009-11-10 13:06:28 EST (Tue, 10 Nov 2009)
@@ -0,0 +1,127 @@
+//  error_demo.cpp  --------------------------------------------------------------------//
+
+//  Copyright Beman Dawes 2009
+
+//  Distributed under the Boost Software License, Version 1.0.
+//  See http://www.boost.org/LICENSE_1_0.txt
+
+//  Library home page: http://www.boost.org/libs/filesystem
+
+//--------------------------------------------------------------------------------------//
+//                                                                                      //
+//  The purpose of this program is to demonstrate how error reporting works.            //
+//                                                                                      //
+//--------------------------------------------------------------------------------------//
+
+#include <boost/filesystem.hpp>
+#include <boost/system/system_error.hpp>
+#include <iostream>
+
+using std::cout;
+using boost::filesystem::path;
+using boost::filesystem::filesystem_error;
+using boost::system::error_code;
+using boost::system::system_error;
+namespace fs = boost::filesystem;
+
+namespace
+{
+  void report_system_error(const system_error& ex)
+  {
+    cout << " threw system_error:\n"
+         << "    ex.code().value() is " << ex.code().value() << '\n'
+         << "    ex.code().category().name() is " << ex.code().category().name() << '\n'
+         << "    ex.what() is " << ex.what() << '\n'
+         ;
+  }
+
+  void report_filesystem_error(const system_error& ex)
+  {
+    cout << "  Threw filesystem_error exception:\n"
+         << "    ex.code().value() is " << ex.code().value() << '\n'
+         << "    ex.code().category().name() is " << ex.code().category().name() << '\n'
+         << "    ex.what() is " << ex.what() << '\n'
+         ;
+  }
+
+  void report_status(fs::file_status s)
+  {
+    cout << "file_status::type() is ";
+    switch (s.type())
+    {
+    case fs::status_error:
+      cout << "status_error\n"; break;
+    case fs::file_not_found:
+      cout << "file_not_found\n"; break;
+    case fs::regular_file:
+      cout << "regular_file\n"; break;
+    case fs::directory_file:
+      cout << "directory_file\n"; break;
+    case fs::symlink_file:
+      cout << "symlink_file\n"; break;
+    case fs::block_file:
+      cout << "block_file\n"; break;
+    case fs::character_file:
+      cout << "character_file\n"; break;
+    case fs::fifo_file:
+      cout << "fifo_file\n"; break;
+    case fs::socket_file:
+      cout << "socket_file\n"; break;
+    case fs::type_unknown:
+      cout << "type_unknown\n"; break;
+    default:
+      cout << "not a valid enumeration constant\n";
+    }
+  }
+
+  bool threw_exception;
+
+}
+
+int main(int argc, char* argv[])
+{
+  if (argc < 2)
+  {
+    cout << "Usage: error_demo path\n";
+    return 1;
+  }
+
+  //  construct path - no error_code
+
+  try { path p1(argv[1]); }
+  catch (const system_error& ex)
+  {
+    cout << "construct path without error_code";
+    report_system_error(ex);
+  }
+
+  //  construct path - with error_code
+
+
+  path p(argv[1]);
+
+  //  get status - no error_code
+
+  fs::file_status s;
+
+  cout << "status(argv[1]);\n";
+  threw_exception = false;
+
+  try { s = fs::status(p); }
+  catch (const system_error& ex)
+  {
+    report_filesystem_error(ex);
+    threw_exception = true;
+  }
+  if (!threw_exception)
+    cout << "  Did not throw exception\n";
+  report_status(s);
+
+  //  get status - with error_code
+
+  //  query existence - no error_code
+
+  //  query existence - with error_code
+
+  return 0;
+}