Class implicit_conversion_dispatch
class implicit_conversion_dispatch;
Class implicit_conversion_dispatch models a dispatch type for implicit type conversion expressions. It meets the ProAccessible requirements of applicable types.
Member Functions
| Name |
Description |
| (constructor) [nothrow] |
constructs an implicit_conversion_dispatch object |
operator() |
invokes the dispatch |
Member Types
| Name |
Description |
accessor |
provides accessibility to proxy |
Example
#include <iomanip>
#include <iostream>
#include "proxy.h"
struct Runnable : pro::facade_builder
::add_convention<pro::operator_dispatch<"()">, void()>
::build {};
struct CopyableRunnable : pro::facade_builder
::support_copy<pro::constraint_level::nontrivial>
::add_facade<Runnable>
::add_direct_convention<pro::implicit_conversion_dispatch,
pro::proxy<Runnable>() const&, pro::proxy<Runnable>() &&>
::build {};
int main() {
pro::proxy<CopyableRunnable> p1 = pro::make_proxy<CopyableRunnable>(
[] { std::cout << "Lambda expression invoked\n"; });
auto p2 = p1; // Copy construction
pro::proxy<Runnable> p3 = p2; // Implicit conversion via const reference of pro::proxy<CopyableRunnable>
std::cout << std::boolalpha << p2.has_value() << "\n"; // Prints: "true"
// auto p4 = p3; // Won't compile because pro::proxy<Runnable> is not copy-constructible
pro::proxy<Runnable> p5 = std::move(p2); // Implicit conversion via rvalue reference of pro::proxy<CopyableRunnable>
std::cout << p2.has_value() << "\n"; // Prints: "false"
(*p5)(); // Prints: "Lambda expression invoked"
}
See Also