diff --git a/gen/gen.go b/gen/gen.go
index fc7d9f0..615e6c5 100644
--- a/gen/gen.go
+++ b/gen/gen.go
@@ -421,7 +421,18 @@ func (g *Generator) CType(typ any, pointerType PointerType) string {
 				ctype = "float"
 			case "float64", "float64_supertype":
 				ctype = "double"
-			case "c_void":
+			case "c_void",
+				// Semantic aliases for c_void
+				"c_void_data_ptr",
+				"c_void_mapped_range_ptr",
+				"c_void_a_native_window",
+				"c_void_ca_metal_layer",
+				"c_void_h_instance",
+				"c_void_h_wnd",
+				"c_void_wl_display",
+				"c_void_wl_surface",
+				"c_void_x11_display",
+				"c_void_xcb_connection":
 				ctype = "void"
 			default:
 				// Handle type names prefixed with the type category.
diff --git a/schema.json b/schema.json
index 28f59f9..d41c0e3 100644
--- a/schema.json
+++ b/schema.json
@@ -34,6 +34,16 @@
             "type": "string",
             "enum": [
                 "c_void",
+                "c_void_data_ptr",
+                "c_void_mapped_range_ptr",
+                "c_void_a_native_window",
+                "c_void_ca_metal_layer",
+                "c_void_h_instance",
+                "c_void_h_wnd",
+                "c_void_wl_display",
+                "c_void_wl_surface",
+                "c_void_x11_display",
+                "c_void_xcb_connection",
                 "bool",
                 "nullable_string",
                 "string_with_default_empty",
diff --git a/webgpu.json b/webgpu.json
index a772a4e..9b7b72a 100644
--- a/webgpu.json
+++ b/webgpu.json
@@ -2662,7 +2662,7 @@
           "returns": {
             "doc": "",
             "pointer": "mutable",
-            "type": "c_void"
+            "type": "c_void_mapped_range_ptr"
           }
         },
         {
@@ -2683,7 +2683,7 @@
           "returns": {
             "doc": "",
             "pointer": "immutable",
-            "type": "c_void"
+            "type": "c_void_mapped_range_ptr"
           }
         },
         {
@@ -2697,7 +2697,7 @@
               "doc": "Destination, to read buffer data into.\n",
               "name": "data",
               "pointer": "mutable",
-              "type": "c_void"
+              "type": "c_void_data_ptr"
             },
             {
               "doc": "Number of bytes of data to read from the buffer.\n(Note @ref WGPU_WHOLE_MAP_SIZE is *not* accepted here.)\n",
@@ -2723,7 +2723,7 @@
               "doc": "Source, to write buffer data from.\n",
               "name": "data",
               "pointer": "immutable",
-              "type": "c_void"
+              "type": "c_void_data_ptr"
             },
             {
               "doc": "Number of bytes of data to write to the buffer.\n(Note @ref WGPU_WHOLE_MAP_SIZE is *not* accepted here.)\n",
@@ -3142,7 +3142,7 @@
               "doc": "TODO\n",
               "name": "data",
               "pointer": "immutable",
-              "type": "c_void"
+              "type": "c_void_data_ptr"
             },
             {
               "doc": "TODO\n",
@@ -3791,7 +3791,7 @@
               "doc": "TODO\n",
               "name": "data",
               "pointer": "immutable",
-              "type": "c_void"
+              "type": "c_void_data_ptr"
             },
             {
               "doc": "TODO\n",
@@ -3814,7 +3814,7 @@
               "doc": "TODO\n",
               "name": "data",
               "pointer": "immutable",
-              "type": "c_void"
+              "type": "c_void_data_ptr"
             },
             {
               "doc": "TODO\n",
@@ -3916,7 +3916,7 @@
               "doc": "TODO\n",
               "name": "data",
               "pointer": "immutable",
-              "type": "c_void"
+              "type": "c_void_data_ptr"
             },
             {
               "doc": "TODO\n",
@@ -4175,7 +4175,7 @@
               "doc": "TODO\n",
               "name": "data",
               "pointer": "immutable",
-              "type": "c_void"
+              "type": "c_void_data_ptr"
             },
             {
               "doc": "TODO\n",
@@ -6521,7 +6521,7 @@
           "doc": "The pointer to the [`ANativeWindow`](https://developer.android.com/ndk/reference/group/a-native-window) that will be wrapped by the @ref WGPUSurface.",
           "name": "window",
           "pointer": "mutable",
-          "type": "c_void"
+          "type": "c_void_a_native_window"
         }
       ],
       "name": "surface_source_android_native_window",
@@ -6537,7 +6537,7 @@
           "doc": "The pointer to the [`CAMetalLayer`](https://developer.apple.com/documentation/quartzcore/cametallayer?language=objc) that will be wrapped by the @ref WGPUSurface.",
           "name": "layer",
           "pointer": "mutable",
-          "type": "c_void"
+          "type": "c_void_ca_metal_layer"
         }
       ],
       "name": "surface_source_metal_layer",
@@ -6553,13 +6553,13 @@
           "doc": "A [`wl_display`](https://wayland.freedesktop.org/docs/html/apa.html#protocol-spec-wl_display) for this Wayland instance.",
           "name": "display",
           "pointer": "mutable",
-          "type": "c_void"
+          "type": "c_void_wl_display"
         },
         {
           "doc": "A [`wl_surface`](https://wayland.freedesktop.org/docs/html/apa.html#protocol-spec-wl_surface) that will be wrapped by the @ref WGPUSurface",
           "name": "surface",
           "pointer": "mutable",
-          "type": "c_void"
+          "type": "c_void_wl_surface"
         }
       ],
       "name": "surface_source_wayland_surface",
@@ -6575,13 +6575,13 @@
           "doc": "The [`HINSTANCE`](https://learn.microsoft.com/en-us/windows/win32/learnwin32/winmain--the-application-entry-point) for this application.\nMost commonly `GetModuleHandle(nullptr)`.\n",
           "name": "hinstance",
           "pointer": "mutable",
-          "type": "c_void"
+          "type": "c_void_h_instance"
         },
         {
           "doc": "The [`HWND`](https://learn.microsoft.com/en-us/windows/apps/develop/ui-input/retrieve-hwnd) that will be wrapped by the @ref WGPUSurface.",
           "name": "hwnd",
           "pointer": "mutable",
-          "type": "c_void"
+          "type": "c_void_h_wnd"
         }
       ],
       "name": "surface_source_windows_HWND",
@@ -6597,7 +6597,7 @@
           "doc": "The `xcb_connection_t` for the connection to the X server.",
           "name": "connection",
           "pointer": "mutable",
-          "type": "c_void"
+          "type": "c_void_xcb_connection"
         },
         {
           "doc": "The `xcb_window_t` for the window that will be wrapped by the @ref WGPUSurface.",
@@ -6618,7 +6618,7 @@
           "doc": "A pointer to the [`Display`](https://www.x.org/releases/current/doc/libX11/libX11/libX11.html#Opening_the_Display) connected to the X server.",
           "name": "display",
           "pointer": "mutable",
-          "type": "c_void"
+          "type": "c_void_x11_display"
         },
         {
           "doc": "The [`Window`](https://www.x.org/releases/current/doc/libX11/libX11/libX11.html#Creating_Windows) that will be wrapped by the @ref WGPUSurface.",
diff --git a/webgpu.yml b/webgpu.yml
index bb9c264..db7b582 100644
--- a/webgpu.yml
+++ b/webgpu.yml
@@ -3117,7 +3117,7 @@ structs:
     members:
       - name: window
         doc: The pointer to the [`ANativeWindow`](https://developer.android.com/ndk/reference/group/a-native-window) that will be wrapped by the @ref WGPUSurface.
-        type: c_void
+        type: c_void_a_native_window
         pointer: mutable
   - name: surface_source_metal_layer
     doc: Chained in @ref WGPUSurfaceDescriptor to make an @ref WGPUSurface wrapping a [`CAMetalLayer`](https://developer.apple.com/documentation/quartzcore/cametallayer?language=objc).
@@ -3127,7 +3127,7 @@ structs:
     members:
       - name: layer
         doc: The pointer to the [`CAMetalLayer`](https://developer.apple.com/documentation/quartzcore/cametallayer?language=objc) that will be wrapped by the @ref WGPUSurface.
-        type: c_void
+        type: c_void_ca_metal_layer
         pointer: mutable
   - name: surface_source_wayland_surface
     doc: Chained in @ref WGPUSurfaceDescriptor to make an @ref WGPUSurface wrapping a [Wayland](https://wayland.freedesktop.org/) [`wl_surface`](https://wayland.freedesktop.org/docs/html/apa.html#protocol-spec-wl_surface).
@@ -3137,11 +3137,11 @@ structs:
     members:
       - name: display
         doc: A [`wl_display`](https://wayland.freedesktop.org/docs/html/apa.html#protocol-spec-wl_display) for this Wayland instance.
-        type: c_void
+        type: c_void_wl_display
         pointer: mutable
       - name: surface
         doc: A [`wl_surface`](https://wayland.freedesktop.org/docs/html/apa.html#protocol-spec-wl_surface) that will be wrapped by the @ref WGPUSurface
-        type: c_void
+        type: c_void_wl_surface
         pointer: mutable
   - name: surface_source_windows_HWND
     doc: Chained in @ref WGPUSurfaceDescriptor to make an @ref WGPUSurface wrapping a Windows [`HWND`](https://learn.microsoft.com/en-us/windows/apps/develop/ui-input/retrieve-hwnd).
@@ -3153,11 +3153,11 @@ structs:
         doc: |
           The [`HINSTANCE`](https://learn.microsoft.com/en-us/windows/win32/learnwin32/winmain--the-application-entry-point) for this application.
           Most commonly `GetModuleHandle(nullptr)`.
-        type: c_void
+        type: c_void_h_instance
         pointer: mutable
       - name: hwnd
         doc: The [`HWND`](https://learn.microsoft.com/en-us/windows/apps/develop/ui-input/retrieve-hwnd) that will be wrapped by the @ref WGPUSurface.
-        type: c_void
+        type: c_void_h_wnd
         pointer: mutable
   - name: surface_source_XCB_window
     doc: Chained in @ref WGPUSurfaceDescriptor to make an @ref WGPUSurface wrapping an [XCB](https://xcb.freedesktop.org/) `xcb_window_t`.
@@ -3167,7 +3167,7 @@ structs:
     members:
       - name: connection
         doc: The `xcb_connection_t` for the connection to the X server.
-        type: c_void
+        type: c_void_xcb_connection
         pointer: mutable
       - name: window
         doc: The `xcb_window_t` for the window that will be wrapped by the @ref WGPUSurface.
@@ -3180,7 +3180,7 @@ structs:
     members:
       - name: display
         doc: A pointer to the [`Display`](https://www.x.org/releases/current/doc/libX11/libX11/libX11.html#Opening_the_Display) connected to the X server.
-        type: c_void
+        type: c_void_x11_display
         pointer: mutable
       - name: window
         doc: The [`Window`](https://www.x.org/releases/current/doc/libX11/libX11/libX11.html#Creating_Windows) that will be wrapped by the @ref WGPUSurface.
@@ -3846,7 +3846,7 @@ objects:
           instead for better performance.
         returns:
           doc: ""
-          type: c_void
+          type: c_void_mapped_range_ptr
           pointer: mutable
         args:
           - name: offset
@@ -3870,7 +3870,7 @@ objects:
           instead for better performance.
         returns:
           doc: ""
-          type: c_void
+          type: c_void_mapped_range_ptr
           pointer: immutable
         args:
           - name: offset
@@ -3902,7 +3902,7 @@ objects:
           - name: data
             doc: |
               Destination, to read buffer data into.
-            type: c_void
+            type: c_void_data_ptr
             pointer: mutable
           - name: size
             doc: |
@@ -3928,7 +3928,7 @@ objects:
           - name: data
             doc: |
               Source, to write buffer data from.
-            type: c_void
+            type: c_void_data_ptr
             pointer: immutable
           - name: size
             doc: |
@@ -4250,7 +4250,7 @@ objects:
           - name: data
             doc: |
               TODO
-            type: c_void
+            type: c_void_data_ptr
             pointer: immutable
           - name: size
             doc: |
@@ -4768,7 +4768,7 @@ objects:
           - name: data
             doc: |
               TODO
-            type: c_void
+            type: c_void_data_ptr
             pointer: immutable
           - name: size
             doc: |
@@ -4786,7 +4786,7 @@ objects:
           - name: data
             doc: |
               TODO
-            type: c_void
+            type: c_void_data_ptr
             pointer: immutable
           - name: data_size
             doc: |
@@ -4863,7 +4863,7 @@ objects:
           - name: data
             doc: |
               TODO
-            type: c_void
+            type: c_void_data_ptr
             pointer: immutable
           - name: size
             doc: |
@@ -5061,7 +5061,7 @@ objects:
           - name: data
             doc: |
               TODO
-            type: c_void
+            type: c_void_data_ptr
             pointer: immutable
           - name: size
             doc: |