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More comments explaining the C++11 exotica

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This commit is contained in:
Paul Licameli 2018-10-21 12:46:41 -04:00
parent f70c76de83
commit d40dfa2de2
1 changed files with 7 additions and 2 deletions
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9
src/commands/CommandManager.h
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@ -460,9 +460,14 @@ namespace MenuTable {
Append( std::forward<Args>(moreArgs)... ); Append( std::forward<Args>(moreArgs)... );
}; };
// Move one unique_ptr to an item into our array
void AppendOne( BaseItemPtr&& ptr ); void AppendOne( BaseItemPtr&& ptr );
// This override allows a lambda or function pointer in the variadic // This overload allows a lambda or function pointer in the variadic
// argument lists without any other syntactic wrapping: // argument lists without any other syntactic wrapping, and also
// allows implicit conversions to type Factory.
// (Thus, a lambda can return a unique_ptr<BaseItem> rvalue even though
// Factory's return type is shared_ptr, and the needed conversion is
// appled implicitly.)
void AppendOne( const Factory &factory ) void AppendOne( const Factory &factory )
{ AppendOne( std::make_unique<ComputedItem>( factory ) ); } { AppendOne( std::make_unique<ComputedItem>( factory ) ); }
}; };