qubit-http 0.4.2

General-purpose HTTP infrastructure for Rust with unified client semantics, secure logging, and built-in SSE decoding
Documentation 
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/*******************************************************************************
 *
 *    Copyright (c) 2025 - 2026.
 *    Haixing Hu, Qubit Co. Ltd.
 *
 *    All rights reserved.
 *
 ******************************************************************************/
//! # Retry Hint
//!
//! Provides lightweight retryability classification for HTTP errors.
//!
//! # Author
//!
//! Haixing Hu

use parse_display::{Display, FromStr as DeriveFromStr};
use serde::{Deserialize, Serialize};

/// High-level classification from [`crate::HttpError::retry_hint`] for backoff policies.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, Display, DeriveFromStr)]
#[serde(rename_all = "snake_case")]
#[display(style = "snake_case")]
pub enum RetryHint {
    /// Transient failure (timeouts, some 5xx/429, transport); callers may retry with care.
    Retryable,
    /// Permanent or non-idempotent failure; do not retry by default.
    NonRetryable,
}