#1558 Add template availablility for untyped component constants and bits

* Add template availablility for untyped component constants and bits

* Update flecs.h

* Update flecs.h

* Update untyped_component.inl

* Update Enum.cpp

* Update Enum.cpp

* Update project.json

* Update Enum.cpp

* Update Enum.cpp

* Update project.json

* Update Enum.cpp

* Update untyped_component.inl

* Update flecs.h

* Update flecs.h

* Update untyped_component.inl

* Update flecs.h

Author: Reddy-dev

distr/flecs.h

@@ -27859,9 +27859,10 @@ untyped_component& member(
 }
 
 /** Add constant. */
+template <typename T = int32_t>
 untyped_component& constant(
     const char *name,
-    int32_t value) 
+    T value)
 {
     ecs_add_id(world_, id_, _::type<flecs::Enum>::id(world_));
 
@@ -27872,16 +27873,17 @@ untyped_component& constant(
     ecs_assert(eid != 0, ECS_INTERNAL_ERROR, NULL);
 
     ecs_set_id(world_, eid, 
-        ecs_pair(flecs::Constant, flecs::I32), sizeof(int32_t),
+        ecs_pair(flecs::Constant, _::type<T>::id(world_)), sizeof(T),
         &value);
 
     return *this;
 }
 
 /** Add bitmask constant. */
+template <typename T = uint32_t>
 untyped_component& bit(
     const char *name, 
-    uint32_t value) 
+    T value)
 {
     ecs_add_id(world_, id_, _::type<flecs::Bitmask>::id(world_));
 
@@ -27892,7 +27894,7 @@ untyped_component& bit(
     ecs_assert(eid != 0, ECS_INTERNAL_ERROR, NULL);
 
     ecs_set_id(world_, eid, 
-        ecs_pair(flecs::Constant, flecs::U32), sizeof(uint32_t),
+        ecs_pair(flecs::Constant, _::type<T>::id(world_)), sizeof(T),
         &value);
 
     return *this;

include/flecs/addons/cpp/mixins/meta/untyped_component.inl

@@ -188,9 +188,10 @@ untyped_component& member(
 }
 
 /** Add constant. */
+template <typename T = int32_t>
 untyped_component& constant(
     const char *name,
-    int32_t value) 
+    T value)
 {
     ecs_add_id(world_, id_, _::type<flecs::Enum>::id(world_));
 
@@ -201,16 +202,17 @@ untyped_component& constant(
     ecs_assert(eid != 0, ECS_INTERNAL_ERROR, NULL);
 
     ecs_set_id(world_, eid, 
-        ecs_pair(flecs::Constant, flecs::I32), sizeof(int32_t),
+        ecs_pair(flecs::Constant, _::type<T>::id(world_)), sizeof(T),
         &value);
 
     return *this;
 }
 
 /** Add bitmask constant. */
+template <typename T = uint32_t>
 untyped_component& bit(
     const char *name, 
-    uint32_t value) 
+    T value)
 {
     ecs_add_id(world_, id_, _::type<flecs::Bitmask>::id(world_));
 
@@ -221,7 +223,7 @@ untyped_component& bit(
     ecs_assert(eid != 0, ECS_INTERNAL_ERROR, NULL);
 
     ecs_set_id(world_, eid, 
-        ecs_pair(flecs::Constant, flecs::U32), sizeof(uint32_t),
+        ecs_pair(flecs::Constant, _::type<T>::id(world_)), sizeof(T),
         &value);
 
     return *this;

test/cpp/project.json

@@ -428,7 +428,8 @@
                 "enum_u8",
                 "enum_u16",
                 "enum_u32",
-                "enum_u64"
+                "enum_u64",
+                "runtime_type_constant_u8_template"
             ]
         }, {
             "id": "Union",

test/cpp/src/Enum.cpp

@@ -1589,3 +1589,31 @@ void Enum_enum_w_one_constant_index_of(void) {
     auto one_type = flecs::enum_type<OneConstant>(ecs);
     test_int(one_type.index_by_value(0), 0);
 }
+
+void Enum_runtime_type_constant_u8_template() {
+    flecs::world ecs;
+
+    auto comp = ecs.component("TestEnumConstant");
+    comp.set<flecs::Component>({ sizeof(uint8_t), alignof(uint8_t) });
+    comp.set<flecs::Enum>({ flecs::U8 });
+
+    comp.constant<uint8_t>("First", 1)
+        .constant<uint8_t>("Second", 2)
+        .constant<uint8_t>("Third", 3);
+
+    auto first = comp.lookup("First");
+    auto second = comp.lookup("Second");
+    auto third = comp.lookup("Third");
+
+    test_assert(first.is_valid());
+    test_assert(second.is_valid());
+    test_assert(third.is_valid());
+
+    const uint8_t *val_first = first.get_second<uint8_t>(flecs::Constant);
+    const uint8_t *val_second = second.get_second<uint8_t>(flecs::Constant);
+    const uint8_t *val_third = third.get_second<uint8_t>(flecs::Constant);
+
+    test_true(val_first != nullptr && *val_first == 1);
+    test_true(val_second != nullptr && *val_second == 2);
+    test_true(val_third != nullptr && *val_third == 3);
+}