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Option`1.cs
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Option`1.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Immutable;
namespace Microsoft.CodeAnalysis.Options
{
/// <inheritdoc cref="Option2{T}"/>
public class Option<T> : ILanguageSpecificOption<T>
{
private readonly OptionDefinition _optionDefinition;
/// <inheritdoc cref="OptionDefinition.Feature"/>
public string Feature => _optionDefinition.Feature;
/// <inheritdoc cref="OptionDefinition.Group"/>
internal OptionGroup Group => _optionDefinition.Group;
/// <inheritdoc cref="OptionDefinition.Name"/>
public string Name => _optionDefinition.Name;
/// <inheritdoc cref="OptionDefinition.DefaultValue"/>
public T DefaultValue => (T)_optionDefinition.DefaultValue!;
/// <inheritdoc cref="OptionDefinition.Type"/>
public Type Type => _optionDefinition.Type;
/// <inheritdoc cref="Option2{T}.StorageLocations"/>
public ImmutableArray<OptionStorageLocation> StorageLocations { get; }
[Obsolete("Use a constructor that specifies an explicit default value.")]
public Option(string feature, string name)
: this(feature, name, default!)
{
// This constructor forwards to the next one; it exists to maintain source-level compatibility with older callers.
}
public Option(string feature, string name, T defaultValue)
: this(feature, name, defaultValue, storageLocations: ImmutableArray<OptionStorageLocation>.Empty)
{
}
public Option(string feature, string name, T defaultValue, params OptionStorageLocation[] storageLocations)
: this(feature, group: OptionGroup.Default, name, defaultValue, storageLocations.ToImmutableArray())
{
}
internal Option(string feature, string name, T defaultValue, OptionStorageLocation storageLocation)
: this(feature, name, defaultValue, storageLocations: ImmutableArray.Create(storageLocation))
{
}
internal Option(string feature, string name, T defaultValue, ImmutableArray<OptionStorageLocation> storageLocations)
: this(feature, OptionGroup.Default, name, defaultValue, storageLocations)
{
}
internal Option(string feature, OptionGroup group, string name, T defaultValue, ImmutableArray<OptionStorageLocation> storageLocations)
: this(new OptionDefinition(feature, group, name, defaultValue, typeof(T), isPerLanguage: false), storageLocations)
{
}
internal Option(OptionDefinition optionDefinition, ImmutableArray<OptionStorageLocation> storageLocations)
{
_optionDefinition = optionDefinition;
this.StorageLocations = storageLocations;
}
OptionGroup IOptionWithGroup.Group => this.Group;
object? IOption.DefaultValue => this.DefaultValue;
bool IOption.IsPerLanguage => false;
OptionDefinition IOption2.OptionDefinition => _optionDefinition;
bool IEquatable<IOption2?>.Equals(IOption2? other) => Equals(other);
public override string ToString() => _optionDefinition.ToString();
public override int GetHashCode() => _optionDefinition.GetHashCode();
public override bool Equals(object? obj) => Equals(obj as IOption2);
private bool Equals(IOption2? other)
{
if (ReferenceEquals(this, other))
{
return true;
}
return _optionDefinition == other?.OptionDefinition;
}
public static implicit operator OptionKey(Option<T> option)
=> new(option);
}
}