src: move Node-API version detection to where it is used

`src/js_native_api_types.h` and other files actually depend on
the moved macros being evaluated, so before this change there
was an implicit requirement that `src/js_native_api.h` would be
included separately before any include of
`src/js_native_api_types.h`, direct or transitive.

PR-URL: #60512
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>

Author: addaleax

src/js_native_api.h

@@ -5,34 +5,6 @@
 #include <stdbool.h>  // NOLINT(modernize-deprecated-headers)
 #include <stddef.h>   // NOLINT(modernize-deprecated-headers)
 
-// Use INT_MAX, this should only be consumed by the pre-processor anyway.
-#define NAPI_VERSION_EXPERIMENTAL 2147483647
-#ifndef NAPI_VERSION
-#ifdef NAPI_EXPERIMENTAL
-#define NAPI_VERSION NAPI_VERSION_EXPERIMENTAL
-#else
-// The baseline version for N-API.
-// The NAPI_VERSION controls which version will be used by default when
-// compilling a native addon. If the addon developer specifically wants to use
-// functions available in a new version of N-API that is not yet ported in all
-// LTS versions, they can set NAPI_VERSION knowing that they have specifically
-// depended on that version.
-#define NAPI_VERSION 8
-#endif
-#endif
-
-#if defined(NAPI_EXPERIMENTAL) &&                                              \
-    !defined(NODE_API_EXPERIMENTAL_NO_WARNING) &&                              \
-    !defined(NODE_WANT_INTERNALS)
-#ifdef _MSC_VER
-#pragma message("NAPI_EXPERIMENTAL is enabled. "                               \
-                "Experimental features may be unstable.")
-#else
-#warning "NAPI_EXPERIMENTAL is enabled. " \
-       "Experimental features may be unstable."
-#endif
-#endif
-
 #include "js_native_api_types.h"
 
 // If you need __declspec(dllimport), either include <node_api.h> instead, or

src/js_native_api_types.h

@@ -1,6 +1,34 @@
 #ifndef SRC_JS_NATIVE_API_TYPES_H_
 #define SRC_JS_NATIVE_API_TYPES_H_
 
+// Use INT_MAX, this should only be consumed by the pre-processor anyway.
+#define NAPI_VERSION_EXPERIMENTAL 2147483647
+#ifndef NAPI_VERSION
+#ifdef NAPI_EXPERIMENTAL
+#define NAPI_VERSION NAPI_VERSION_EXPERIMENTAL
+#else
+// The baseline version for N-API.
+// The NAPI_VERSION controls which version will be used by default when
+// compilling a native addon. If the addon developer specifically wants to use
+// functions available in a new version of N-API that is not yet ported in all
+// LTS versions, they can set NAPI_VERSION knowing that they have specifically
+// depended on that version.
+#define NAPI_VERSION 8
+#endif
+#endif
+
+#if defined(NAPI_EXPERIMENTAL) &&                                              \
+    !defined(NODE_API_EXPERIMENTAL_NO_WARNING) &&                              \
+    !defined(NODE_WANT_INTERNALS)
+#ifdef _MSC_VER
+#pragma message("NAPI_EXPERIMENTAL is enabled. "                               \
+                "Experimental features may be unstable.")
+#else
+#warning "NAPI_EXPERIMENTAL is enabled. " \
+       "Experimental features may be unstable."
+#endif
+#endif
+
 // This file needs to be compatible with C compilers.
 // This is a public include file, and these includes have essentially
 // became part of it's API.