Improve error when X11/Wayland is not present
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1 changed files with 8 additions and 3 deletions
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@ -765,10 +765,15 @@ impl<T: 'static> EventLoop<T> {
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#[cfg(x11_platform)]
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(None, _, true) => Backend::X,
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// No backend is present.
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_ => {
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return Err(EventLoopError::Os(os_error!(OsError::Misc(
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(_, wayland_display, x11_display) => {
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let msg = if wayland_display && !cfg!(wayland_platform) {
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"DISPLAY is not set; note: enable the `winit/wayland` feature to support Wayland"
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} else if x11_display && !cfg!(x11_platform) {
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"WAYLAND_DISPLAY is not set; note: enable the `winit/x11` feature to support X11"
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} else {
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"neither WAYLAND_DISPLAY nor DISPLAY is set."
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))));
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};
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return Err(EventLoopError::Os(os_error!(OsError::Misc(msg))));
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}
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};
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