auto_gcroot::operator bool
Operator for using auto_gcroot in a conditional expression.
operator bool() const;
Return Value
true if the wrapped object is valid; false otherwise.
Remarks
This operator actually converts to _detail_class::_safe_bool which is safer than bool because it cannot be converted to an integral type.
Example
// msl_auto_gcroot_operator_bool.cpp
// compile with: /clr
#include <msclr\auto_gcroot.h>
using namespace System;
using namespace msclr;
int main() {
auto_gcroot<String^> s;
if ( s ) Console::WriteLine( "s is valid" );
if ( !s ) Console::WriteLine( "s is invalid" );
s = "something";
if ( s ) Console::WriteLine( "now s is valid" );
if ( !s ) Console::WriteLine( "now s is invalid" );
s.reset();
if ( s ) Console::WriteLine( "now s is valid" );
if ( !s ) Console::WriteLine( "now s is invalid" );
}
s is invalid now s is valid now s is invalid
Requirements
Header file <msclr\auto_gcroot.h>
Namespace msclr