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fix ambiguous for HandlerWithResponse and Handler in set_error_handler

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using lambda expression as Handler in set_error_handler will cause ambiguous.
Template forwarding can forward HandlerWithResponse to the correct overloading function
This commit is contained in:
Congcong Cai 2024-03-07 19:07:39 +08:00
parent 6791a8364d
commit 4dd2f3d03d
1 changed files with 15 additions and 4 deletions
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19
httplib.h
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@ -231,6 +231,7 @@ using socket_t = int;
#include <string>
#include <sys/stat.h>
#include <thread>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#include <utility>
@ -871,8 +872,13 @@ public:
Server &set_default_file_mimetype(const std::string &mime);
Server &set_file_request_handler(Handler handler);
Server &set_error_handler(HandlerWithResponse handler);
Server &set_error_handler(Handler handler);
template <class ErrorHandlerFunc>
Server &set_error_handler(ErrorHandlerFunc &&handler) {
return set_error_handler_impl(
std::forward<ErrorHandlerFunc>(handler),
std::is_convertible<ErrorHandlerFunc, HandlerWithResponse>{});
}
Server &set_exception_handler(ExceptionHandler handler);
Server &set_pre_routing_handler(HandlerWithResponse handler);
Server &set_post_routing_handler(Handler handler);
@ -934,6 +940,9 @@ protected:
size_t payload_max_length_ = CPPHTTPLIB_PAYLOAD_MAX_LENGTH;
private:
Server &set_error_handler_impl(HandlerWithResponse handler, std::true_type);
Server &set_error_handler_impl(Handler handler, std::false_type);
using Handlers =
std::vector<std::pair<std::unique_ptr<detail::MatcherBase>, Handler>>;
using HandlersForContentReader =
@ -5797,12 +5806,14 @@ inline Server &Server::set_file_request_handler(Handler handler) {
return *this;
}
inline Server &Server::set_error_handler(HandlerWithResponse handler) {
inline Server &Server::set_error_handler_impl(HandlerWithResponse handler,
std::true_type) {
error_handler_ = std::move(handler);
return *this;
}
inline Server &Server::set_error_handler(Handler handler) {
inline Server &Server::set_error_handler_impl(Handler handler,
std::false_type) {
error_handler_ = [handler](const Request &req, Response &res) {
handler(req, res);
return HandlerResponse::Handled;