Use dedicated logging for interpose and development warnings

Sources/OpenSwiftUICore/Log/Logging.swift

@@ -219,6 +219,10 @@ package enum Log {
 
     // Added in 6.4.41
     package static let timelineScheduleSequences: Logger = Logger(subsystem: subsystem, category: "TimelineSchedule Sequences")
+
+    #if DEBUG
+    fileprivate static let development: Logger = Logger(subsystem: subsystem, category: "Development")
+    #endif
 }
 
 @available(*, unavailable)
@@ -235,7 +239,7 @@ package func precondition(_ condition: @autoclosure () -> Bool, _ message: @auto
 package func preconditionFailure(_ message: @autoclosure () -> String, file: StaticString, line: UInt) -> Never {
     #if DEBUG && OPENSWIFTUI_DEVELOPMENT
     if message() == "TODO" {
-        print("💣 Hit unimplemented part of OpenSwiftUI at \(file):\(line).\nConsider adding a plain implementation to avoid crash.")
+        Log.development.warning("Hit unimplemented part of OpenSwiftUI at \(file):\(line).\nConsider adding a plain implementation to avoid crash.")
     }
     #endif
     Swift.fatalError(message(), file: file, line: line)
@@ -284,16 +288,20 @@ package func _openSwiftUIPlatformUnimplementedFailure(_ function: String = #func
 
 @_transparent
 package func _openSwiftUIUnimplementedWarning(_ function: String = #function, file: StaticString = #fileID, line: UInt = #line) {
-    print("\(file):\(line): Warning: \(function) is unimplemented")
-    #if DEBUG && OPENSWIFTUI_DEVELOPMENT
+    #if DEBUG
+    Log.development.warning("\(file):\(line): Warning: \(function) is unimplemented")
+    #if OPENSWIFTUI_DEVELOPMENT
     _openSwiftUIUnimplementedFailure(function, file: file, line: line)
     #endif
+    #endif
 }
 
 @_transparent
 package func _openSwiftUIPlatformUnimplementedWarning(_ function: String = #function, file: StaticString = #fileID, line: UInt = #line) {
-    print("\(file):\(line): Warning: \(function) is unimplemented on this platform")
-    #if DEBUG && OPENSWIFTUI_DEVELOPMENT
+    #if DEBUG
+    Log.development.warning("\(file):\(line): Warning: \(function) is unimplemented on this platform")
+    #if OPENSWIFTUI_DEVELOPMENT
     _openSwiftUIPlatformUnimplementedFailure(function, file: file, line: line)
     #endif
+    #endif
 }

Sources/OpenSwiftUI_SPI/Util/Interpose.c

@@ -8,9 +8,19 @@
 
 #include <stdbool.h>
 #include <stdint.h>
+#include <dispatch/dispatch.h>
 #include <os/log.h>
 #include <CoreFoundation/CoreFoundation.h>
 
+static os_log_t interpose_log(void) {
+    static dispatch_once_t onceToken;
+    static os_log_t log = NULL;
+    dispatch_once(&onceToken, ^{
+        log = os_log_create("org.OpenSwiftUIProject.OpenSwiftUI", "Interpose");
+    });
+    return log;
+}
+
 // MARK: - Type Description Shim
 
 // swift_getTypeName returns the module-qualified name (e.g. "OpenSwiftUI.CGDrawingView")
@@ -71,7 +81,6 @@ static inline CFStringRef _interpose_protocol_description(const void *protocol)
             return result;
         }
     }
-
     CFStringRef result = CFStringCreateWithCString(kCFAllocatorDefault, name, kCFStringEncodingUTF8);
     CFAutorelease(result);
     return result;
@@ -113,15 +122,15 @@ static bool my_swift_dynamicCast(void *dest, void *src, const void *srcType, con
          CFStringHasPrefix(targetDescription, CFSTR("SwiftUICore."))) &&
         (CFStringHasPrefix(srcDescription, CFSTR("OpenSwiftUI.")) ||
          CFStringHasPrefix(srcDescription, CFSTR("OpenSwiftUICore.")))) {
-        os_log_info(OS_LOG_DEFAULT, "[OpenSwiftUI] swift_dynamicCast failed for target: %{public}@ src: %{public}@", targetDescription, srcDescription);
+        os_log_info(interpose_log(), "swift_dynamicCast failed for target: %{public}@ src: %{public}@", targetDescription, srcDescription);
     }
     // If dynamicCast check failed and the target is SwiftUI's Color.Resolved
     // retry with OpenSwiftUI's Color.Resolved
     if (targetType == &$s7SwiftUI5ColorV8ResolvedVN) {
         result = swift_dynamicCast(dest, src, srcType, _OpenSwiftUI_ColorResolvedNTD(), flags);
         if (result) {
             CFStringRef description = _interpose_type_description(srcType);
-            os_log_info(OS_LOG_DEFAULT, "[OpenSwiftUI] swift_dynamicCast succeeded for %{public}@", description);
+            os_log_info(interpose_log(), "swift_dynamicCast succeeded for %{public}@", description);
         }
     }
     return result;
@@ -152,15 +161,15 @@ static const void *my_swift_conformsToProtocol2(const void *type, const void *pr
          CFStringHasPrefix(protocolDescription, CFSTR("SwiftUICore."))) &&
         (CFStringHasPrefix(typeDescription, CFSTR("OpenSwiftUI.")) ||
          CFStringHasPrefix(typeDescription, CFSTR("OpenSwiftUICore.")))) {
-        os_log_info(OS_LOG_DEFAULT, "[OpenSwiftUI] swift_conformsToProtocol2 failed for protocol: %{public}@ type: %{public}@", protocolDescription, typeDescription);
+        os_log_info(interpose_log(), "swift_conformsToProtocol2 failed for protocol: %{public}@ type: %{public}@", protocolDescription, typeDescription);
     }
     // If conformance check failed and the protocol is SwiftUI's PlatformDrawable,
     // retry with OpenSwiftUI's PlatformDrawable
     if (protocol == &$s7SwiftUI16PlatformDrawableMp) {
         result = swift_conformsToProtocol2(type, _OpenSwiftUI_PlatformDrawablePD());
         if (result != NULL) {
             CFStringRef description = _interpose_type_description(type);
-            os_log_info(OS_LOG_DEFAULT, "[OpenSwiftUI] swift_conformsToProtocol2 succeeded via OpenSwiftUI fallback for %{public}@", description);
+            os_log_info(interpose_log(), "swift_conformsToProtocol2 succeeded via OpenSwiftUI fallback for %{public}@", description);
         }
     }
     return result;