tauri-apps/tauri · error

not implemented

Error message

not implemented

What it means

tao_activation_policy maps tauri's ActivationPolicy enum onto tao's on macOS. The match only covers Regular, Accessory and Prohibited; any other variant (e.g. macOS-only additions not yet mapped) reaches unimplemented!. SetActivationPolicy and handle_user_message funnel through this function on macOS.

Solutions

1. Only use ActivationPolicy::Regular, Accessory or Prohibited
2. Upgrade tauri-runtime-wry/tao to versions where the missing variant is mapped
3. Avoid setting the policy at runtime if you only need a default policy

Example fix

// before
app.set_activation_policy(ActivationPolicy::SelectControls);
// after
app.set_activation_policy(ActivationPolicy::Accessory);

match policy {
  ActivationPolicy::Regular | ActivationPolicy::Accessory | ActivationPolicy::Prohibited => app.set_activation_policy(policy),
  _ => eprintln!("unsupported activation policy on macOS backend"),
}

fn is_supported_policy(p: &ActivationPolicy) -> bool {
  matches!(p, ActivationPolicy::Regular | ActivationPolicy::Accessory | ActivationPolicy::Prohibited)
}

When it happens

Trigger: Calling app.set_activation_policy(ActivationPolicy::...) with a variant not covered by the mapping, or sending the corresponding SetActivationPolicy message through the event loop on macOS.

Common situations: Using a newer ActivationPolicy variant added upstream (e.g. ComboBox/SelectControls from AppKit) that the runtime mapping has not been updated for; version drift between tauri and tao/tao-activation-policy definitions.

Related errors

• not implemented
• not implemented
• not implemented
• Cargo manifest must have the `package.version` field
• Cargo project does not have a version

AI-assisted analysis of tauri-apps/tauri@460ec35447 (2026-09-18). Data as JSON: /api/errors/5bf09bf1eaafd52d. Report an issue: GitHub.

Appendix: source

Thrown at crates/tauri-runtime-wry/src/lib.rs:617

    }
  }
}

pub fn map_theme(theme: &TaoTheme) -> Theme {
  match theme {
    TaoTheme::Light => Theme::Light,
    TaoTheme::Dark => Theme::Dark,
    _ => Theme::Light,
  }
}

#[cfg(target_os = "macos")]
fn tao_activation_policy(activation_policy: ActivationPolicy) -> TaoActivationPolicy {
  match activation_policy {
    ActivationPolicy::Regular => TaoActivationPolicy::Regular,
    ActivationPolicy::Accessory => TaoActivationPolicy::Accessory,
    ActivationPolicy::Prohibited => TaoActivationPolicy::Prohibited,
    _ => unimplemented!(),
  }
}

pub struct MonitorHandleWrapper(pub MonitorHandle);

impl From<MonitorHandleWrapper> for Monitor {
  fn from(monitor: MonitorHandleWrapper) -> Monitor {
    Self {
      name: monitor.0.name(),
      position: monitor.0.position(),
      size: monitor.0.size(),
      work_area: monitor.0.work_area(),
      scale_factor: monitor.0.scale_factor(),
    }
  }
}

#[cfg(desktop)]

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