Error C3767 Candidate Functions Not Accessible

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Error C3767 Candidate Function(s) Not Accessible

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Candidate Function(s) Not Accessible C++

Sign up C++ CLI error C3767: candidate function(s) not accessible up vote 13 down vote favorite 2 I'm new to C++ CLI coming from unmanaged C++ world. I'm getting this error: candidate function(s) not accessible when I pass a std::string as part of the method argument. Here's the exact code: Lib Project (compiled as .dll project) //Lib.h #pragma once public ref class Lib { public: Lib(void); public: void Extract( std::string& data_ ); }; //Lib.cpp #include "Lib.h" Lib::Lib(void) { } void Lib::Extract( std::string& data_ ) { data_.empty(); } LibTest Project (compiled as application.exe) // LibTest.h #pragma once ref class LibTest { public: LibTest(void); }; // LibTest.cpp #include "LibTest.h" LibTest::LibTest(void) { Lib^ lib = gcnew Lib; lib->Extract( std::string("test") ); } int main() { return 0; } Compiler Error: 1>------ Build started: Project: LibTest, Configuration: Debug Win32 ------ 1>Compiling... 1>LibTest.cpp 1>.\LibTest.cpp(7) : error C3767: 'Lib::Extract': candidate function(s) not accessible c++-cli share|improve this question edited Mar 9 '15 at 16:34 Deduplicator 27.9k63265 asked Jun 3 '09 at 20:59 sivabudh 12k35117188 add a comment| 3 Answers 3 active oldest votes up vote 23 down vote accepted The problem is that std::string will compile as a internal (non public) type. This is actually a change in VS 2005+: http://msdn.microsoft.com/en-us/library/ms177253(VS.80).aspx: Native types are private by default outside the assembly Native types now will not be visible outside the assembly by default. For more information on type visibility outside the assembly, see Type Visibility. This change was primarily driven by the needs of developers us

resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards Events Community Magazine Forums Blogs Channel 9 Documentation APIs and reference Dev centers Retired content Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. C/C++ Building Reference C/C++ Build Errors Compiler Errors C3500 through C3999 Compiler Errors C3500 through C3999 Compiler Error C3767 Compiler Error C3767 Compiler Error C3767 Compiler Error C3500 Compiler Error C3501 Compiler Error C3505 Compiler Error C3506 Compiler Error C3507 Compiler http://stackoverflow.com/questions/947213/c-cli-error-c3767-candidate-functions-not-accessible Error C3508 Compiler Error C3509 Compiler Error C3510 Compiler Error C3519 Compiler Error C3530 Compiler Error C3531 Compiler Error C3532 Compiler Error C3533 Compiler Error C3535 Compiler Error C3536 Compiler Error C3537 Compiler Error C3538 Compiler Error C3539 Compiler Error C3540 Compiler Error C3541 Compiler Error C3550 Compiler Error C3551 Compiler Error C3552 Compiler Error C3553 Compiler Error C3554 Compiler Error C3555 Compiler https://msdn.microsoft.com/en-us/library/19dh8yat.aspx Error C3556 Compiler Error C3603 Compiler Error C3609 Compiler Error C3610 Compiler Error C3611 Compiler Error C3612 Compiler Error C3618 Compiler Error C3619 Compiler Error C3622 Compiler Error C3623 Compiler Error C3624 Compiler Error C3625 Compiler Error C3626 Compiler Error C3627 Compiler Error C3628 Compiler Error C3630 Compiler Error C3631 Compiler Error C3632 Compiler Error C3633 Compiler Error C3634 Compiler Error C3637 Compiler Error C3638 Compiler Error C3640 Compiler Error C3641 Compiler Error C3642 Compiler Error C3644 Compiler Error C3645 Compiler Error C3646 Compiler Error C3648 Compiler Error C3650 Compiler Error C3651 Compiler Error C3652 Compiler Error C3653 Compiler Error C3654 Compiler Error C3655 Compiler Error C3656 Compiler Error C3657 Compiler Error C3661 Compiler Error C3662 Compiler Error C3665 Compiler Error C3666 Compiler Error C3668 Compiler Error C3669 Compiler Error C3670 Compiler Error C3671 Compiler Error C3672 Compiler Error C3673 Compiler Error C3675 Compiler Error C3697 Compiler Error C3698 Compiler Error C3699 Compiler Error C3701 Compiler Error C3702 Compiler Error C3703 Compiler Error C3704 Compiler Error C3705 Compiler Error C3706 Compiler Error C3707 Compiler Error C3708 Compiler Error C3709 Compiler Error C3710 Compiler Error C3711

with managed .NET code (which is extremly nice). Mixing such code also allows you to create methods in a .NET class that take or return pointers to native (C++) classes. Unfortunately, this doesn't https://manski.net/2012/01/passing-native-pointers-across-ccli-assembly-boundaries/ work out of the box across assemblies (read: DLLs). If you define a .NET http://www.cplusplus.com/forum/beginner/98205/ class in one assembly and this class has a method that returns a pointer, you may not be able to use this method from within another C++/CLI assembly. This article describes the problem and shows solutions. Table of Contents [hide] 1 For the impatient 2 Preparation 3 The Problem 3.1 What does work 3.2 What doesn't work error c3767 a.k.a "The Problem" 4 The Solution 4.1 Native Types From Pure C++ Projects 4.2 Native Types From C++/CLI Projects 5 Source Code 6 History For the impatient ∞ For those of you that don't want to read the whole article, here's the summary: Library providing method with native type: Native types outside a C++/CLI project need to be made public in a C++/CLI project via #pragma make_public(Type) Native types inside error c3767 candidate a C++/CLI project need to be made public via keyword public. This pragma has to be written in the .h file To prevent C3767, include the .h file before the pragma (i.e. don't just use a forward declaration). Library using the method: Needs to include .h file of native type Forward declaration may not be enough (gives linker warning) If the native type is defined inside a C++/CLI project, the project must be reference in the project settings via "Add Reference" as well as "Linker -> Input". Preparation ∞ To illustrate the problem, we first create some projects that we can use as basis. Each project will only contain one or two classes, so nothing fancy here. I'll assume you know how to create projects and how to enable and disable the /clr compiler switch to create C++/CLI and pure C++ project respectivly. The first project (called "NativeLib") is a pure C++ (no C++/CLI) and DLL project which provides a native (unmanaged) class called MyNativeClass. This class is the type that will later be passed across assembly boundaries. Here's the source code (for the meaning of NATIVE_LIB_EXPORT, see Projects in Visual C++ 2010 - Part 1: Creating a DLL project): // MyNativeClass.h #pragma once #ifdef COMPILE_NATIVE_LIB #define NATIVE_LIB_EXPORT __declsp

methods from file Allformvariables.h in MyForm.h I'm putting variables in a seperate class to the form because i want to use the same variables in multiple different forms (at different times) and so im using a private scope for the variables and have my get/set methods as public. However for some reason i get the error in title when building it. i have tried #pragma make_public(type) but not sure if i was using the right type or putting it in the right place... if you need code i will put it in but its larger than i like to put in posts. any help would be greatly appreciated. This is for my A2 computing project so i really need it done but can't figure it out Last edited on Apr 7, 2013 at 3:13pm UTC Apr 7, 2013 at 3:31pm UTC vlad from moscow (6539) I think that the message means that the compiler found the best appropriate function to call but the funcion either has private or protected access control that is it is inaccessible from the code where it is called. Apr 7, 2013 at 3:44pm UTC welsh4evr (15) well thats what i figured aswell. but both the functions are all set as public and i still get the error. I know that VS 2012 sets all native types as Private but when i try to override them using #pragma make_public(type) it dosn't change anything. I suspect i'm probably using that wrong but i can't figure out any other way to do it. my code in the class is 1
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private: Allformvariables(void); //variables used on multiple forms float WindSpeed; float Gravity; float restitution; char WindDirection; Point MouseStart; Point MouseEnd; Point Velocity; //Set items public: void Setfloats(float x, int chan