zrx-id 0.0.20

Identifier abstractions and utilities
Documentation 
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// Copyright (c) 2025-2026 Zensical and contributors

// SPDX-License-Identifier: MIT
// All contributions are certified under the DCO

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the `Software`), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED `AS IS`, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.

// ----------------------------------------------------------------------------

//! Wildcard.

use std::fmt::{self, Display, Write};

// ----------------------------------------------------------------------------
// Enums
// ----------------------------------------------------------------------------

/// Wildcard.
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum Wildcard {
    /// Character, i.e. `?`.
    Character,
    /// Character sequence, i.e. `*`.
    Sequence,
    /// Traversal across path segments, i.e. `**`.
    Traversal,
}

// ----------------------------------------------------------------------------
// Trait implementations
// ----------------------------------------------------------------------------

impl Display for Wildcard {
    /// Formats the wildcard for display.
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Wildcard::Character => f.write_char('?'),
            Wildcard::Sequence => f.write_char('*'),
            Wildcard::Traversal => f.write_str("**"),
        }
    }
}