77 lines
2.9 KiB
C#
77 lines
2.9 KiB
C#
// This file is part of YamlDotNet - A .NET library for YAML.
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// Copyright (c) Antoine Aubry and contributors
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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// of the Software, and to permit persons to whom the Software is furnished to do
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// so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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using System;
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using System.Text.RegularExpressions;
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namespace YamlDotNet.Core
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{
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public struct AnchorName : IEquatable<AnchorName>
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{
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public static readonly AnchorName Empty = default;
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// https://yaml.org/spec/1.2/spec.html#id2785586
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private static readonly Regex AnchorPattern = new Regex(@"^[^\[\]\{\},]+$", StandardRegexOptions.Compiled);
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private readonly string? value;
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public string Value => value ?? throw new InvalidOperationException("Cannot read the Value of an empty anchor");
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public bool IsEmpty => value is null;
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public AnchorName(string value)
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{
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this.value = value ?? throw new ArgumentNullException(nameof(value));
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if (!AnchorPattern.IsMatch(value))
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{
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throw new ArgumentException($"Anchor cannot be empty or contain disallowed characters: []{{}},\nThe value was '{value}'.", nameof(value));
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}
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}
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public override string ToString() => value ?? "[empty]";
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public bool Equals(AnchorName other) => Equals(value, other.value);
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public override bool Equals(object? obj)
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{
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return obj is AnchorName other && Equals(other);
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}
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public override int GetHashCode()
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{
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return value?.GetHashCode() ?? 0;
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}
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public static bool operator ==(AnchorName left, AnchorName right)
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{
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return left.Equals(right);
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}
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public static bool operator !=(AnchorName left, AnchorName right)
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{
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return !(left == right);
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}
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public static implicit operator AnchorName(string? value) => value == null ? Empty : new AnchorName(value);
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}
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}
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