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Add default completion token to 1-arg overloads of dispatch, post and defer.

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This commit is contained in:
Christopher Kohlhoff
2025-11-04 23:44:14 +11:00
parent d5d9428a3c
commit 85a9eb155e
6 changed files with 60 additions and 6 deletions
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4
include/boost/asio/defer.hpp
View File

@@ -80,8 +80,8 @@ namespace asio {
* @par Completion Signature
* @code void() @endcode
*/
template <BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) NullaryToken>
inline auto defer(NullaryToken&& token)
template <BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) NullaryToken = deferred_t>
inline auto defer(NullaryToken&& token = deferred_t())
-> decltype(
async_initiate<NullaryToken, void()>(
declval<detail::initiate_defer>(), token))

4
include/boost/asio/dispatch.hpp
View File

@@ -70,8 +70,8 @@ namespace asio {
* @par Completion Signature
* @code void() @endcode
*/
template <BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) NullaryToken>
inline auto dispatch(NullaryToken&& token)
template <BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) NullaryToken = deferred_t>
inline auto dispatch(NullaryToken&& token = deferred_t())
-> decltype(
async_initiate<NullaryToken, void()>(
declval<detail::initiate_dispatch>(), token))

4
include/boost/asio/post.hpp
View File

@@ -78,8 +78,8 @@ namespace asio {
* @par Completion Signature
* @code void() @endcode
*/
template <BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) NullaryToken>
inline auto post(NullaryToken&& token)
template <BOOST_ASIO_COMPLETION_TOKEN_FOR(void()) NullaryToken = deferred_t>
inline auto post(NullaryToken&& token = deferred_t())
-> decltype(
async_initiate<NullaryToken, void()>(
declval<detail::initiate_post>(), token))

18
test/defer.cpp
View File

@@ -16,6 +16,7 @@
// Test that header file is self-contained.
#include <boost/asio/defer.hpp>
#include <boost/asio/bind_executor.hpp>
#include <boost/asio/io_context.hpp>
#include "unit_test.hpp"
@@ -95,6 +96,22 @@ void move_only_result_handler(
*result_out = result_in.value();
}
void defer_no_args_test()
{
io_context ctx(1);
int handler_count = 0;
boost::asio::defer(boost::asio::deferred)(
boost::asio::bind_executor(ctx,
bindns::bind(void_handler, &handler_count)));
BOOST_ASIO_CHECK(handler_count == 0);
ctx.run();
BOOST_ASIO_CHECK(handler_count == 1);
}
void defer_function_test()
{
io_context ctx(1);
@@ -229,5 +246,6 @@ void defer_function_test()
BOOST_ASIO_TEST_SUITE
(
"defer",
BOOST_ASIO_TEST_CASE(defer_no_args_test)
BOOST_ASIO_TEST_CASE(defer_function_test)
)

18
test/dispatch.cpp
View File

@@ -16,6 +16,7 @@
// Test that header file is self-contained.
#include <boost/asio/dispatch.hpp>
#include <boost/asio/bind_executor.hpp>
#include <boost/asio/io_context.hpp>
#include "unit_test.hpp"
@@ -95,6 +96,22 @@ void move_only_result_handler(
*result_out = result_in.value();
}
void dispatch_no_args_test()
{
io_context ctx(1);
int handler_count = 0;
boost::asio::dispatch(boost::asio::deferred)(
boost::asio::bind_executor(ctx,
bindns::bind(void_handler, &handler_count)));
BOOST_ASIO_CHECK(handler_count == 0);
ctx.run();
BOOST_ASIO_CHECK(handler_count == 1);
}
void dispatch_function_test()
{
io_context ctx(1);
@@ -229,5 +246,6 @@ void dispatch_function_test()
BOOST_ASIO_TEST_SUITE
(
"dispatch",
BOOST_ASIO_TEST_CASE(dispatch_no_args_test)
BOOST_ASIO_TEST_CASE(dispatch_function_test)
)

18
test/post.cpp
View File

@@ -16,6 +16,7 @@
// Test that header file is self-contained.
#include <boost/asio/post.hpp>
#include <boost/asio/bind_executor.hpp>
#include <boost/asio/io_context.hpp>
#include "unit_test.hpp"
@@ -95,6 +96,22 @@ void move_only_result_handler(
*result_out = result_in.value();
}
void post_no_args_test()
{
io_context ctx(1);
int handler_count = 0;
boost::asio::post(boost::asio::deferred)(
boost::asio::bind_executor(ctx,
bindns::bind(void_handler, &handler_count)));
BOOST_ASIO_CHECK(handler_count == 0);
ctx.run();
BOOST_ASIO_CHECK(handler_count == 1);
}
void post_function_test()
{
io_context ctx(1);
@@ -229,5 +246,6 @@ void post_function_test()
BOOST_ASIO_TEST_SUITE
(
"post",
BOOST_ASIO_TEST_CASE(post_no_args_test)
BOOST_ASIO_TEST_CASE(post_function_test)
)