| Les deux révisions précédentesRévision précédenteProchaine révision | Révision précédente |
| lang:csharp:clr [2018/12/07 17:54] – Ajout de "Syntaxe de C++/CLI" root | lang:csharp:clr [2019/12/13 15:17] (Version actuelle) – mhtml -> html root |
|---|
| =====Syntaxe de C++/CLI==== | ====Syntaxe de C++/CLI==== |
| Les types ''C#'' se postfixe avec un ''^'' et on utilise ''using namespace'' à la place de ''using'' pour faire la différence avec le ''C++''. | Les types ''C#'' se postfixe avec un ''^'' et on utilise ''using namespace'' à la place de ''using'' pour faire la différence avec le ''C++''. |
| <code csharp> | <code csharp> |
| La notion de référence ''&'' n'existe pas pour les objets managés. | La notion de référence ''&'' n'existe pas pour les objets managés. |
| |
| =====C# => C++===== | ====C# => C++==== |
| ===Pointeurs=== | ===Pointeurs=== |
| [[https://stackoverflow.com/questions/25600940/managed-c-cli-array-conversion-error|Managed C++/CLI Array Conversion Error]] {{ :lang:csharp:clr:c_cli_-_managed_c_cli_array_conversion_error_-_stack_overflow.mhtml |Archive du 22/11/2018}} | [[https://stackoverflow.com/questions/25600940/managed-c-cli-array-conversion-error|Managed C++/CLI Array Conversion Error]] {{ :lang:csharp:clr:c_cli_-_managed_c_cli_array_conversion_error_-_stack_overflow_2019-12-13_3_13_20_pm_.html |Archive du 01/09/2014 le 13/12/2019}} |
| * C# | * C# |
| <code csharp> | <code csharp> |
| |
| * CLR | * CLR |
| | C'est ''cli::pin_ptr'' qui fait office de ''GC::StillAlive()'' et donc ''val'' ne sera pas purgé tant que ''pin_ptr'' est en vie. |
| | |
| | <blockquote>An object is pinned only while a pin_ptr points to it. The object is no longer pinned when its pinning pointer goes out of scope, or is set to nullptr. After the pin_ptr goes out of scope, the object that was pinned can be moved in the heap by the garbage collector. |
| | |
| | [[https://docs.microsoft.com/en-us/cpp/windows/pin-ptr-cpp-cli?view=vs-2017|pin_ptr (C++/CLI)]] {{ :lang:csharp:clr:pin_ptr_c_cli_microsoft_docs_2019-12-13_3_13_28_pm_.html |Archive du 12/10/2018 le 13/12/2019}} |
| | </blockquote> |
| | |
| <code cpp> | <code cpp> |
| static float CalcSumArray(array<float>^ val, int length) | static float CalcSumArray(array<float>^ val, int length) |
| </code> | </code> |
| |
| =====C++ => C#===== | ===Marshaling=== |
| ===string=== | ^From type ^To type ^Marshal method ^Include file^ |
| | |System::String%%^%% |const char * |marshal_context |marshal.h| |
| | |System::String%%^%% |const wchar_t* |marshal_context |marshal.h| |
| | |System::IntPtr |HANDLE |marshal_as |marshal_windows.h| |
| | |System::String%%^%% |BSTR |marshal_context |marshal_windows.h| |
| | |System::String%%^%% |bstr_t |marshal_as |marshal_windows.h| |
| | |System::String%%^%% |std::string |marshal_as |marshal_cppstd.h| |
| | |System::String%%^%% |std::wstring |marshal_as |marshal_cppstd.h| |
| | |System::String%%^%% |CStringT<char> |marshal_as |marshal_atl.h| |
| | |System::String%%^%% |CStringT<wchar_t> |marshal_as |marshal_atl.h| |
| | |System::String%%^%% |CComBSTR |marshal_as |marshal_atl.h| |
| | |
| | Exemple : |
| <code cpp> | <code cpp> |
| #include <msclr\marshal.h> | #include <msclr\marshal_cppstd.h> |
| | System::String^ managed = "test"; |
| | std::string unmanaged = msclr::interop::marshal_as<std::string>(managed); |
| | </code> |
| |
| const char * message = "test"; | [[https://docs.microsoft.com/en-us/cpp/dotnet/overview-of-marshaling-in-cpp?view=vs-2017|Overview of Marshaling in C++]] {{ :lang:csharp:clr:overview_of_marshaling_in_c_microsoft_docs_2019-12-13_3_13_36_pm_.html |Archive du 12/07/2019 le 13/12/2019}} |
| String^ managed = marshal_as<String^>( message ); | |
| | ====C++ => C#==== |
| | ===Marshaling=== |
| | ^From type ^To type ^Marshal method ^Include file^ |
| | |const char * |System::String%%^%% |marshal_as |marshal.h| |
| | |char * |System::String%%^%% |marshal_as |marshal.h| |
| | |const wchar_t * |System::String%%^%% |marshal_as |marshal.h| |
| | |wchar_t * |System::String%%^%% |marshal_as |marshal.h| |
| | |HANDLE |System::IntPtr |marshal_as |marshal_windows.h| |
| | |BSTR |System::String%%^%% |marshal_as |marshal.h| |
| | |bstr_t |System::String%%^%% |marshal_as |marshal_windows.h| |
| | |std::string |System::String%%^%% |marshal_as |marshal_cppstd.h| |
| | |std::wstring |System::String%%^%% |marshal_as |marshal_cppstd.h| |
| | |CStringT<char> |System::String%%^%% |marshal_as |marshal_atl.h| |
| | |CStringT<wchar_t> |System::String%%^%% |marshal_as |marshal_atl.h| |
| | |CComBSTR |System::String%%^%% |marshal_as |marshal_atl.h| |
| | |
| | ===struct=== |
| | <code cpp> |
| | struct Argument |
| | { |
| | int age; |
| | char name[50]; |
| | } ; |
| </code> | </code> |
| | |
| | <code csharp> |
| | [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)] |
| | public struct Argument |
| | { |
| | public int age; |
| | |
| | [MarshalAs(UnmanagedType.LPStr, SizeConst = 50)] |
| | public string name; |
| | // fixed char name[50]; // Autre possibilité |
| | } |
| | </code> |
| | |
| | ===Prototype=== |
| | ^C++/CLI ^C# généré ^ |
| | |''uint8_t'' |''byte'' | |
| | |''array<uint8_t>%%^%%'' |''byte[]'' | |
| | |''System::String%%^%%'' |''string'' | |
| | |''System::String%%^%%%'' |''ref string''| |
| | |''[System::Runtime::InteropServices::Out]System::String%%^%%%''|''out string''| |
| | |''[System::Runtime::InteropServices::In]System::String%%^%%%'' |''ref string''| |
| | |''float'' |''float'' | |
| | |''float&'' |''float*'' | |
| | |''float%'' |''ref float'' | |
| | |
| | ====Erreurs==== |
| | * '''IServiceProvider': ambiguous symbol'' |
| | Il ne faut pas mettre ''using namespace System;'' avant la déclaration de ''#include <msclr/marshal_cppstd.h>''. |
| | |
| | * '''msclr::interop::marshal_as': none of the 3 overloads could convert all the argument types'' |
| | Il ne faut pas tenter d'utiliser directement un attribut d'une classe. Il faut passer par une variable locale : |
| | <code> |
| | System::String^ fic = fichier_; |
| | std::string tt = msclr::interop::marshal_as<std::string>(fic); |
| | </code> |
| | |
| | * '''XXX.YYY(?)' is not supported by the language'' |
| | Apparaît dans le projet C# en essayant d'appeler une fonction du projet ''C++/CLI''. Dans le projet ''C++/CLI'', il manque le ''^'' après le type à la place du ''?''. |
| | |
| | [[https://qualapps.blogspot.com/2008/07/using-atlstrh-in-managed-project.html|Fixing "ambiguous symbol" in a C++/CLR project]] {{ :lang:csharp:clr:technical_blog_for_jim_beveridge_fixing_ambiguous_symbol_in_a_c_clr_project_2019-12-13_3_13_44_pm_.html |Archive du 11/07/2008 le 13/12/2019}} |