googlemaps / googlemaps/google-maps-ios-utils
-Wenum-enum-conversion error in GMUHeatmapTileLayer.m with Xcode 26 / Clang 16+
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- Objective-C
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Description
Starting with Xcode 26 (Clang 16+), the compiler flags a bitwise OR between CGBitmapInfo and CGImageAlphaInfo enum types under -Wenum-enum-conversion.
In Sources/GoogleMapsUtilsObjC/include/GMUHeatmapTileLayer.m: `colorSpaceRef, kCGBitmapByteOrder32Big | kCGImageAlphaLast`
`kCGBitmapByteOrder32Big` is a `CGBitmapInfo` value and `kCGImageAlphaLast` is a `CGImageAlphaInfo` value. While combining these with bitwise OR is common and intended by Apple's API design, Clang 16+ now warns about it.
This causes build failures for projects that use -Werror (treat warnings as errors), such as Flutter's CI.
Environment: Xcode 26.4, iOS 26 SDK
Related: [flutter/flutter/issues/184470](vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/code/electron-browser/workbench/workbench.html)
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