C++ outline panel does not correctly parse classes/structs with preprocessor macros between class keyword and the class name #44596
Description
Reproduction steps
git clone https://webrtc.googlesource.com/src(this is a large repository and may take a minute to clone)- Open repository in Zed
- Open file api/audio/audio_processing.h. This file has code like:
class RTC_EXPORT AudioProcessing : public RefCountInterface {
public:
// ... class API is here
}This is a common pattern to control symbol visibility in C++ libraries.
5. Open outline panel
Current vs. Expected behavior
The outline panel interprets the RTC_EXPORT preprocessor macro as the name of the class and fails to parse any of the class functions or members:
If the macro is replaced with what the preprocessor expands it to, the outline panel parses the class correctly:
Zed version and system specs
Zed: v0.217.0+dev.71ca6c4d47e3815f07fbc6d4c7557a36a4f9f1ae (Zed Dev 71ca6c4)
OS: Linux Wayland fedora 43
Memory: 15.4 GiB
Architecture: x86_64
GPU: Intel(R) UHD Graphics 620 (KBL GT2) || Intel open-source Mesa driver || Mesa 25.2.7
Attach Zed log file
Zed.log
2025-11-03T14:15:22-06:00 INFO [zed] ========== starting zed version 0.212.0, sha f51114c ==========
2025-11-03T14:16:39-06:00 INFO [zed] ========== starting zed version 0.212.0, sha f51114c ==========
2025-11-03T14:16:46-06:00 INFO [zed] Using git binary path: None
2025-11-03T14:16:46-06:00 WARN [zed::reliability] Minidump endpoint not set
2025-11-03T14:16:46-06:00 INFO [extension_host] extensions updated. loading 4, reloading 0, unloading 0
2025-11-03T14:16:47-06:00 INFO [util] set environment variables from shell:/usr/bin/fish, path:/home/be/.config/netlify/helper/bin:/home/be/sw/depot_tools:/home/be/local/libexec:/home/be/.cargo/bin:/home/be/.npm_global/bin:/home/be/local/bin:/home/be/.local/bin:/usr/lib64/ccache:/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin
2025-11-03T14:16:47-06:00 WARN [audio::audio_settings] Denoise does not work on debug builds, not enabling
2025-11-03T14:16:47-06:00 WARN [audio::audio_settings] Denoise does not work on debug builds, not enabling
2025-11-03T14:16:47-06:00 INFO [gpui::platform::linux::platform] activate is not implemented on Linux, ignoring the call
2025-11-03T14:16:49-06:00 INFO [client] set status on client 0: Authenticating
2025-11-03T14:16:49-06:00 INFO [workspace::persistence] Got 1 breakpoints from database at path: /home/be/sw/zed/crates/livekit_client/src/livekit_client/playback.rs
2025-11-03T14:16:49-06:00 INFO [gpui::platform::blade::blade_renderer] Initializing Blade pipelines for surface SurfaceInfo { format: Bgra8Unorm, alpha: PreMultiplied }
2025-11-03T14:16:49-06:00 INFO [workspace] Rendered first frame
2025-11-03T14:16:49-06:00 INFO [zed::zed] Using GPU: GpuSpecs { is_software_emulated: false, device_name: "Intel(R) UHD Graphics 620 (KBL GT2)", driver_name: "Intel open-source Mesa driver", driver_info: "Mesa 25.2.5" }
2025-11-03T14:16:51-06:00 INFO [client] set status on client 467069: Authenticated
2025-11-03T14:16:51-06:00 WARN [task::vscode_format] Skipping deserializing of a task `build` with the unsupported `dependsOn` key
2025-11-03T14:16:54-06:00 INFO [languages::rust] found rust-analyzer in PATH. trying to run `rust-analyzer --help`
2025-11-03T14:16:55-06:00 INFO [language] found user-installed language server for rust-analyzer. path: "/home/be/.cargo/bin/rust-analyzer", arguments: []
2025-11-03T14:16:55-06:00 INFO [lsp] starting language server process. binary path: "/home/be/.cargo/bin/rust-analyzer", working directory: "/home/be/sw/zed", args: []
2025-11-03T14:17:10-06:00 INFO [zed] Using git binary path: None
2025-11-03T14:17:11-06:00 WARN [zed::reliability] Minidump endpoint not set
2025-11-03T14:17:11-06:00 INFO [extension_host] extensions updated. loading 4, reloading 0, unloading 0
2025-11-03T14:17:11-06:00 INFO [client] set status on client 467069: Reauthenticating
2025-11-03T14:17:11-06:00 ERROR [channel::channel_store] not connected
2025-11-03T14:17:11-06:00 INFO [client] set status on client 467069: Reauthenticated
2025-11-03T14:17:11-06:00 INFO [client] set status on client 467069: Connecting
2025-11-03T14:17:11-06:00 INFO [util] set environment variables from shell:/usr/bin/fish, path:/home/be/.config/netlify/helper/bin:/home/be/sw/depot_tools:/home/be/local/libexec:/home/be/.cargo/bin:/home/be/.npm_global/bin:/home/be/local/bin:/home/be/.local/bin:/usr/lib64/ccache:/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin
2025-11-03T14:17:11-06:00 INFO [client] connected to rpc endpoint https://collab.zed.dev/rpc
2025-11-03T14:17:11-06:00 WARN [audio::audio_settings] Denoise does not work on debug builds, not enabling
2025-11-03T14:17:11-06:00 WARN [audio::audio_settings] Denoise does not work on debug builds, not enabling
2025-11-03T14:17:11-06:00 INFO [gpui::platform::linux::platform] activate is not implemented on Linux, ignoring the call
2025-11-03T14:17:12-06:00 INFO [client] set status on client 467069: Connected { peer_id: PeerId { owner_id: 901, id: 103487 }, connection_id: ConnectionId { owner_id: 0, id: 0 } }
2025-11-03T14:17:15-06:00 INFO [client] unhandled message RoomUpdated
2025-11-03T14:17:15-06:00 WARN [audio] Audio does not sound correct without optimizations. Use a release build to debug audio issues
2025-11-03T14:17:16-06:00 INFO [client] set status on client 0: Authenticating
2025-11-03T14:17:16-06:00 INFO [workspace::persistence] Got 1 breakpoints from database at path: /home/be/sw/zed/crates/livekit_client/src/livekit_client/playback.rs
2025-11-03T14:17:16-06:00 INFO [gpui::platform::blade::blade_renderer] Initializing Blade pipelines for surface SurfaceInfo { format: Bgra8Unorm, alpha: PreMultiplied }
2025-11-03T14:17:17-06:00 INFO [workspace] Rendered first frame
2025-11-03T14:17:17-06:00 INFO [zed::zed] Using GPU: GpuSpecs { is_software_emulated: false, device_name: "Intel(R) UHD Graphics 620 (KBL GT2)", driver_name: "Intel open-source Mesa driver", driver_info: "Mesa 25.2.5" }
2025-11-03T14:17:21-06:00 INFO [client] set status on client 467069: Authenticated
2025-11-03T14:17:21-06:00 WARN [task::vscode_format] Skipping deserializing of a task `build` with the unsupported `dependsOn` key
2025-11-03T14:17:30-06:00 INFO [languages::rust] found rust-analyzer in PATH. trying to run `rust-analyzer --help`
2025-11-03T14:17:33-06:00 INFO [languages::rust] found rust-analyzer in PATH. trying to run `rust-analyzer --help`
2025-11-03T14:17:35-06:00 INFO [language] found user-installed language server for rust-analyzer. path: "/home/be/.cargo/bin/rust-analyzer", arguments: []
2025-11-03T14:17:35-06:00 INFO [lsp] starting language server process. binary path: "/home/be/.cargo/bin/rust-analyzer", working directory: "/home/be/sw/zed", args: []
2025-11-03T14:17:36-06:00 INFO [audio] Output stream: OutputStream { config: OutputStreamConfig { channel_count: 2, sample_rate: 44100, buffer_size: Default, sample_format: F32 }, .. }
2025-11-03T14:17:39-06:00 WARN [audio] Audio does not sound correct without optimizations. Use a release build to debug audio issues
2025-11-03T14:17:39-06:00 WARN [audio] Audio does not sound correct without optimizations. Use a release build to debug audio issues
2025-11-03T14:17:39-06:00 INFO [livekit_api::signal_client::signal_stream] connecting to wss://zed.livekit.cloud/rtc?sdk=rust&protocol=16&auto_subscribe=1&adaptive_stream=0&version=0.7.21
2025-11-03T14:17:40-06:00 INFO [gpui::platform::blade::blade_renderer] Initializing Blade pipelines for surface SurfaceInfo { format: Bgra8Unorm, alpha: PreMultiplied }
2025-11-03T14:17:40-06:00 INFO [zed::zed] Using GPU: GpuSpecs { is_software_emulated: false, device_name: "Intel(R) UHD Graphics 620 (KBL GT2)", driver_name: "Intel open-source Mesa driver", driver_info: "Mesa 25.2.5" }
2025-11-03T14:17:40-06:00 INFO [gpui::platform::linux::platform] activate is not implemented on Linux, ignoring the call
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:03-06:00 ERROR [gpui::window] window not found
2025-11-03T14:19:06-06:00 ERROR [client::telemetry] task 42 was cancelled
</details>
### Relevant Zed settings
<details><summary>settings.json</summary>
<!-- Paste your settings inside the code block. -->
```json
(for AI issues) Model provider details
No response
If you are using WSL on Windows, what flavor of Linux are you using?
None