From c80b634497aff3022780e2d6e8675ae5490e6a1b Mon Sep 17 00:00:00 2001
From: skypjack <michele.caini@gmail.com>
Date: Wed, 18 Jun 2025 12:22:41 +0200
Subject: [PATCH] process: basic_process vs process

---
 TODO                            |  3 +--
 src/entt/process/fwd.hpp        |  9 ++++++---
 src/entt/process/process.hpp    | 24 ++++++++++++------------
 src/entt/process/scheduler.hpp  | 13 ++++++-------
 test/entt/process/process.cpp   | 22 +++++++++++-----------
 test/entt/process/scheduler.cpp | 19 +++++++++----------
 6 files changed, 45 insertions(+), 45 deletions(-)

diff --git a/TODO b/TODO
index 8825b3b2b..238caae09 100644
--- a/TODO
+++ b/TODO
@@ -37,6 +37,5 @@ TODO:
 * use any for meta_custom_node
 * avoid copying meta_type/data/func nodes
 * paged vector as a standalone class
-* basic_process vs process with default delta type
+* basic_process_adaptor vs process_adaptor with default delta type
 * update process/scheduler natvis and doc after rework
-* process test with allocator_arg
diff --git a/src/entt/process/fwd.hpp b/src/entt/process/fwd.hpp
index 76667b113..304b97f12 100644
--- a/src/entt/process/fwd.hpp
+++ b/src/entt/process/fwd.hpp
@@ -7,13 +7,16 @@
 namespace entt {
 
 template<typename>
-class process;
+class basic_process;
 
-template<typename = std::uint32_t, typename = std::allocator<void>>
+/*! @brief Alias declaration for the most common use case. */
+using process = basic_process<std::uint32_t>;
+
+template<typename, typename = std::allocator<void>>
 class basic_scheduler;
 
 /*! @brief Alias declaration for the most common use case. */
-using scheduler = basic_scheduler<>;
+using scheduler = basic_scheduler<std::uint32_t>;
 
 } // namespace entt
 
diff --git a/src/entt/process/process.hpp b/src/entt/process/process.hpp
index d1acc5390..105ec4c9d 100644
--- a/src/entt/process/process.hpp
+++ b/src/entt/process/process.hpp
@@ -57,9 +57,9 @@ namespace entt {
  * @tparam Delta Type to use to provide elapsed time.
  */
 template<typename Delta>
-class process: private std::enable_shared_from_this<process<Delta>> {
+class basic_process: private std::enable_shared_from_this<basic_process<Delta>> {
     class process_arg_t {
-        friend class process<Delta>;
+        friend class basic_process<Delta>;
         explicit process_arg_t() = default;
     };
 
@@ -89,29 +89,29 @@ public:
     using delta_type = Delta;
 
     /*! @brief Default constructor. */
-    constexpr process(token_type)
+    constexpr basic_process(token_type)
         : current{state::idle} {}
 
     /*! @brief Default destructor. */
-    virtual ~process() = default;
+    virtual ~basic_process() = default;
 
     /*! @brief Default copy constructor. */
-    process(const process &) = default;
+    basic_process(const basic_process &) = default;
 
     /*! @brief Default move constructor. */
-    process(process &&) noexcept = default;
+    basic_process(basic_process &&) noexcept = default;
 
     /**
      * @brief Default copy assignment operator.
      * @return This process.
      */
-    process &operator=(const process &) = default;
+    basic_process &operator=(const basic_process &) = default;
 
     /**
      * @brief Default move assignment operator.
      * @return This process.
      */
-    process &operator=(process &&) noexcept = default;
+    basic_process &operator=(basic_process &&) noexcept = default;
 
     /**
      * @brief Factory method.
@@ -288,11 +288,11 @@ private:
  * @tparam Delta Type to use to provide elapsed time.
  */
 template<typename Func, typename Delta>
-struct process_adaptor: public process<Delta>, private Func {
+struct process_adaptor: public basic_process<Delta>, private Func {
     /*! @brief Process constructor token. */
-    using token_type = typename process<Delta>::token_type;
+    using token_type = typename basic_process<Delta>::token_type;
     /*! @brief Type used to provide elapsed time. */
-    using delta_type = typename process<Delta>::delta_type;
+    using delta_type = typename basic_process<Delta>::delta_type;
 
     /**
      * @brief Constructs a process adaptor from a lambda or a functor.
@@ -302,7 +302,7 @@ struct process_adaptor: public process<Delta>, private Func {
      */
     template<typename... Args>
     process_adaptor(const token_type token, Args &&...args)
-        : process<Delta>{token},
+        : basic_process<Delta>{token},
           Func{std::forward<Args>(args)...} {}
 
     /**
diff --git a/src/entt/process/scheduler.hpp b/src/entt/process/scheduler.hpp
index 2fb430418..31894e52c 100644
--- a/src/entt/process/scheduler.hpp
+++ b/src/entt/process/scheduler.hpp
@@ -16,11 +16,11 @@ namespace entt {
 /*! @cond TURN_OFF_DOXYGEN */
 namespace internal {
 
-template<typename Delta>
+template<typename Type>
 struct process_handler {
     // std::shared_ptr because of its type erased allocator which is useful here
     std::shared_ptr<process_handler> next{};
-    std::shared_ptr<process<Delta>> task{};
+    std::shared_ptr<Type> task{};
 };
 
 } // namespace internal
@@ -55,8 +55,9 @@ struct process_handler {
  */
 template<typename Delta, typename Allocator>
 class basic_scheduler {
-    using handler_type = internal::process_handler<Delta>;
+    using process_type = basic_process<Delta>;
     using alloc_traits = std::allocator_traits<Allocator>;
+    using handler_type = internal::process_handler<process_type>;
     using container_allocator = typename alloc_traits::template rebind_alloc<handler_type>;
     using container_type = std::vector<handler_type, container_allocator>;
 
@@ -201,8 +202,7 @@ public:
      */
     template<typename Proc, typename... Args>
     basic_scheduler &attach(Args &&...args) {
-        static_assert(std::is_base_of_v<process<Delta>, Proc>, "Invalid process type");
-        handlers.first().emplace_back().task = process<Delta>::allocate<Proc>(handlers.second(), std::forward<Args>(args)...);
+        handlers.first().emplace_back().task = process_type::template allocate<Proc>(handlers.second(), std::forward<Args>(args)...);
         return *this;
     }
 
@@ -272,12 +272,11 @@ public:
      */
     template<typename Proc, typename... Args>
     basic_scheduler &then(Args &&...args) {
-        static_assert(std::is_base_of_v<process<Delta>, Proc>, "Invalid process type");
         ENTT_ASSERT(!handlers.first().empty(), "Process not available");
         auto *curr = &handlers.first().back();
         for(; curr->next; curr = curr->next.get()) {}
         curr->next = std::allocate_shared<handler_type>(handlers.second());
-        curr->next->task = process<Delta>::allocate<Proc>(handlers.second(), std::forward<Args>(args)...);
+        curr->next->task = process_type::template allocate<Proc>(handlers.second(), std::forward<Args>(args)...);
         return *this;
     }
 
diff --git a/test/entt/process/process.cpp b/test/entt/process/process.cpp
index 3f1828754..81a85f8ef 100644
--- a/test/entt/process/process.cpp
+++ b/test/entt/process/process.cpp
@@ -5,8 +5,8 @@
 #include "../../common/empty.h"
 
 template<typename Delta>
-class test_process: public entt::process<Delta> {
-    using entt::process<Delta>::process;
+class test_process: public entt::basic_process<Delta> {
+    using entt::basic_process<Delta>::basic_process;
 
     void succeeded() override {
         succeeded_invoked = true;
@@ -36,7 +36,7 @@ public:
 };
 
 TEST(Process, Basics) {
-    auto process = entt::process<int>::allocate<test_process<int>>(std::allocator<void>{});
+    auto process = entt::basic_process<int>::allocate<test_process<int>>(std::allocator<void>{});
 
     ASSERT_FALSE(process->alive());
     ASSERT_FALSE(process->finished());
@@ -91,7 +91,7 @@ TEST(Process, Basics) {
 }
 
 TEST(Process, Succeeded) {
-    auto process = entt::process<test::empty>::allocate<test_process<test::empty>>(std::allocator<void>{});
+    auto process = entt::basic_process<test::empty>::allocate<test_process<test::empty>>(std::allocator<void>{});
 
     process->tick({});
     process->tick({});
@@ -110,7 +110,7 @@ TEST(Process, Succeeded) {
 }
 
 TEST(Process, Fail) {
-    auto process = entt::process<int>::allocate<test_process<int>>(std::allocator<void>{});
+    auto process = entt::basic_process<int>::allocate<test_process<int>>(std::allocator<void>{});
 
     process->tick(0);
     process->tick(0);
@@ -129,7 +129,7 @@ TEST(Process, Fail) {
 }
 
 TEST(Process, Data) {
-    auto process = entt::process<test::empty>::allocate<test_process<test::empty>>(std::allocator<void>{});
+    auto process = entt::basic_process<test::empty>::allocate<test_process<test::empty>>(std::allocator<void>{});
     int value = 0;
 
     process->tick({});
@@ -150,7 +150,7 @@ TEST(Process, Data) {
 }
 
 TEST(Process, AbortNextTick) {
-    auto process = entt::process<int>::allocate<test_process<int>>(std::allocator<void>{});
+    auto process = entt::basic_process<int>::allocate<test_process<int>>(std::allocator<void>{});
 
     process->tick(0);
     process->abort();
@@ -168,7 +168,7 @@ TEST(Process, AbortNextTick) {
 }
 
 TEST(Process, AbortImmediately) {
-    auto process = entt::process<test::empty>::allocate<test_process<test::empty>>(std::allocator<void>{});
+    auto process = entt::basic_process<test::empty>::allocate<test_process<test::empty>>(std::allocator<void>{});
 
     process->tick({});
     process->abort(true);
@@ -192,7 +192,7 @@ TEST(ProcessAdaptor, Resolved) {
         resolve();
     };
 
-    auto process = entt::process<std::uint64_t>::allocate<entt::process_adaptor<decltype(lambda), std::uint64_t>>(std::allocator<void>{}, lambda);
+    auto process = entt::basic_process<std::uint64_t>::allocate<entt::process_adaptor<decltype(lambda), std::uint64_t>>(std::allocator<void>{}, lambda);
 
     process->tick(0);
     process->tick(0);
@@ -209,7 +209,7 @@ TEST(ProcessAdaptor, Rejected) {
         rejected();
     };
 
-    auto process = entt::process<std::uint64_t>::allocate<entt::process_adaptor<decltype(lambda), std::uint64_t>>(std::allocator<void>{}, lambda);
+    auto process = entt::basic_process<std::uint64_t>::allocate<entt::process_adaptor<decltype(lambda), std::uint64_t>>(std::allocator<void>{}, lambda);
 
     process->tick(0);
     process->tick(0);
@@ -225,7 +225,7 @@ TEST(ProcessAdaptor, Data) {
         resolve();
     };
 
-    auto process = entt::process<std::uint64_t>::allocate<entt::process_adaptor<decltype(lambda), std::uint64_t>>(std::allocator<void>{}, lambda);
+    auto process = entt::basic_process<std::uint64_t>::allocate<entt::process_adaptor<decltype(lambda), std::uint64_t>>(std::allocator<void>{}, lambda);
 
     process->tick(0, &value);
 
diff --git a/test/entt/process/scheduler.cpp b/test/entt/process/scheduler.cpp
index dbdd50276..33e8b1e9f 100644
--- a/test/entt/process/scheduler.cpp
+++ b/test/entt/process/scheduler.cpp
@@ -5,9 +5,8 @@
 #include <entt/process/process.hpp>
 #include <entt/process/scheduler.hpp>
 
-class foo_process: public entt::process<entt::scheduler::delta_type> {
-    using base_type = entt::process<entt::scheduler::delta_type>;
-    using token_type = typename base_type::token_type;
+class foo_process: public entt::process {
+    using token_type = typename entt::process::token_type;
 
     void update(const delta_type, void *) override {
         on_update();
@@ -19,7 +18,7 @@ class foo_process: public entt::process<entt::scheduler::delta_type> {
 
 public:
     foo_process(const token_type token, std::function<void()> upd, std::function<void()> abort)
-        : base_type{token},
+        : entt::process{token},
           on_update{std::move(upd)},
           on_aborted{std::move(abort)} {}
 
@@ -28,24 +27,24 @@ private:
     std::function<void()> on_aborted;
 };
 
-class succeeded_process: public entt::process<entt::scheduler::delta_type> {
-    void update(const entt::scheduler::delta_type, void *data) override {
+class succeeded_process: public entt::process {
+    void update(const delta_type, void *data) override {
         ++static_cast<std::pair<int, int> *>(data)->first;
         succeed();
     }
 
 public:
-    using entt::process<entt::scheduler::delta_type>::process;
+    using entt::process::process;
 };
 
-class failed_process: public entt::process<entt::scheduler::delta_type> {
-    void update(const entt::scheduler::delta_type, void *data) override {
+class failed_process: public entt::process {
+    void update(const delta_type, void *data) override {
         ++static_cast<std::pair<int, int> *>(data)->second;
         fail();
     }
 
 public:
-    using entt::process<entt::scheduler::delta_type>::process;
+    using entt::process::process;
 };
 
 TEST(Scheduler, Functionalities) {