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// =============================================================================
// Copyright (c) 2025 - 2026 Haixing Hu.
//
// SPDX-License-Identifier: Apache-2.0
//
// Licensed under the Apache License, Version 2.0.
// =============================================================================
//! Validation errors for JSON recursion-depth budgets.
use std::{
error::Error,
fmt::{
self,
Display,
Formatter,
},
};
/// Reports which JSON recursion-depth invariant was violated.
#[non_exhaustive]
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum JsonDepthBudgetError {
/// The recursive container depth limit was zero.
ZeroDepth,
}
impl Display for JsonDepthBudgetError {
/// Writes a concise description of the violated budget invariant.
///
/// # Parameters
///
/// * `formatter` - Destination formatting context.
///
/// # Returns
///
/// The formatter result after writing the error description.
///
/// # Errors
///
/// Returns [`fmt::Error`] when the destination rejects output.
fn fmt(&self, formatter: &mut Formatter<'_>) -> fmt::Result {
match self {
Self::ZeroDepth => formatter
.write_str("JSON depth budget must be greater than zero"),
}
}
}
impl Error for JsonDepthBudgetError {}