qubit-redact 0.4.0

Rule-driven redaction for fields, diagnostics, HTTP data, and Rust domain objects
Documentation 
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// =============================================================================
//    Copyright (c) 2026 Haixing Hu.
//
//    SPDX-License-Identifier: Apache-2.0
//
//    Licensed under the Apache License, Version 2.0.
// =============================================================================
//! Error returned when a process-wide policy is installed twice.

use std::{
    error::Error,
    fmt,
};

use crate::RedactionPolicy;

/// Owns the policy that could not be installed because a global policy was
/// already installed.
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct InstallGlobalPolicyError(pub(crate) RedactionPolicy);

impl InstallGlobalPolicyError {
    /// Returns the policy that was rejected by the global slot.
    #[must_use = "use the rejected policy or drop it explicitly"]
    pub fn into_policy(self) -> RedactionPolicy {
        self.0
    }
}

impl fmt::Display for InstallGlobalPolicyError {
    /// Writes the stable installation error message.
    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
        formatter.write_str("the global redaction policy is already installed")
    }
}

impl Error for InstallGlobalPolicyError {}