Lambda declaration cannot access closure variables when defined as a member function of an inline class by Adaptation

Closed

as Fixed

Type:	Bug
ID:	581680
Opened:	7/30/2010 10:30:05 AM
Access Restriction:	Public

Workaround(s)

view

User(s) can reproduce this bug

A Lambda function declared within a member function of an inline class complains that it cannot access the closure variables. Example given in steps to reproduce.

Notes:
* Moving the class outside of the function declaration compiles fine
* Having no arguments for the lambda compiles fine

Details (expand)

Visual Studio 2010

#include <functional>
#include <iostream>

int main( ) {

    struct InlineStruct {
        static void AddF( const std::function< int( int ) >& func ) {
            std::cout << func( 1 ) << '\n';
        }
        static void AddI( int a ) {
            AddF( [a]( int c ) { return a + c; } );
        }
    };

    InlineStruct::AddI( 2 );

    return 0;
}

English

Windows 7

English

error C2326: 'void main::InlineStruct::AddI(int)' : function cannot access 'a'

Program to compile and output the number 3.

File Name	Submitted By	Submitted On	File Size
main.cpp	Adaptation	7/30/2010	331 bytes

Posted by Microsoft on 8/1/2010 at 10:14 PM

Thanks for your feedback. We are routing this issue to the appropriate group within the Visual Studio Product Team for triage and resolution. These specialized experts will follow-up with your issue.

Posted by Microsoft on 7/30/2010 at 5:10 PM

Thank you for your feedback, we are currently reviewing the issue you have submitted. If this issue is urgent, please contact support directly(http://support.microsoft.com)

Microsoft