JavaUnqualifiedTypeName.cs

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using System;
 
using IKVM.Runtime.Extensions;
 
namespace IKVM.Runtime.Syntax
{
 
    readonly struct JavaUnqualifiedTypeName
    {
 
        public static JavaUnqualifiedTypeName Empty => new(ReadOnlyMemory<char>.Empty);
 
        public static implicit operator string(JavaUnqualifiedTypeName typeName) => typeName.ToString();
        public static implicit operator JavaUnqualifiedTypeName(string typeName) => new(typeName);
 
        public static implicit operator ReadOnlyMemory<char>(JavaUnqualifiedTypeName typeName) => typeName.value;
        public static implicit operator JavaUnqualifiedTypeName(ReadOnlyMemory<char> typeName) => new(typeName);
 
        public static bool operator ==(JavaUnqualifiedTypeName a, JavaUnqualifiedTypeName b) => a.value.Span.Equals(b.value.Span, StringComparison.Ordinal);
        public static bool operator !=(JavaUnqualifiedTypeName a, JavaUnqualifiedTypeName b) => a.value.Span.Equals(b.value.Span, StringComparison.Ordinal) == false;
 
        readonly ReadOnlyMemory<char> value;
 
        public JavaUnqualifiedTypeName(string value) :
            this(value.AsMemory())
        {
            if (value is null)
                throw new ArgumentNullException(nameof(value));
        }
 
        public JavaUnqualifiedTypeName(ReadOnlyMemory<char> value)
        {
            this.value = value;
        }
 
        public ReadOnlyMemory<char> Value => value;
 
        public bool IsEmpty => value.IsEmpty;
 
        public bool IsInnerClass => value.Span.LastIndexOf('$') != -1;
 
        public bool IsNestedClass => value.Span.LastIndexOf('$') is int i && i != -1 && i + 1 < value.Length && char.IsNumber(value.Span[i + 1]) == false;
 
        public bool IsAnonymousClass => value.Span.LastIndexOf('$') is int i && i != -1 && i + 1 < value.Length && value.Slice(i + 1).Span.OnlyNumbers();
 
        public bool IsLocalClass => value.Span.LastIndexOf('$') is int i && i != -1 && i + 2 < value.Length && char.IsNumber(value.Span[i + 1]) && value.Slice(i + 1).Span.OnlyNumbers() == false;
 
        public bool Equals(JavaUnqualifiedTypeName other) => value.Span.Equals(other.value.Span, StringComparison.Ordinal);
 
        public override bool Equals(object obj) => false;
 
        public override int GetHashCode() => value.Span.GetHashCodeExtension();
 
        public override string ToString() => value.Span.ToString();
 
    }
 
}