private CSharpElement ConvertTypedef(CSharpConverter converter, CppTypedef cppTypedef, CSharpElement context)
{
var elementType = cppTypedef.ElementType;
if (DefaultFunctionTypeConverter.IsFunctionType(elementType, out var cppFunctionType))
{
return(DefaultFunctionTypeConverter.ConvertNamedFunctionType(converter, cppFunctionType, context, cppTypedef));
}
var isFromSystemIncludes = converter.IsFromSystemIncludes(cppTypedef);
var csElementType = converter.GetCSharpType(elementType, context, true);
var noWrap = converter.Options.TypedefCodeGenKind == CppTypedefCodeGenKind.NoWrap && !converter.Options.TypedefWrapWhiteList.Contains(cppTypedef.Name);
// If:
// - the typedef is from system includes and the underlying type is not a pointer
// - or the typedef mode is "no-wrap" and is not in the whitelist
// then we bypass entirely the typedef and return immediately the element type
bool is_size_t = isFromSystemIncludes && cppTypedef.Name == "size_t";
if (noWrap || (isFromSystemIncludes && elementType.TypeKind != CppTypeKind.Pointer && !is_size_t))
{
return(csElementType);
}
// Otherwise we generate a small wrapper struct
var csStructName = converter.GetCSharpName(cppTypedef, context);
var csStruct = new CSharpStruct(csStructName)
{
CppElement = cppTypedef,
};
var container = converter.GetCSharpContainer(cppTypedef, context);
converter.ApplyDefaultVisibility(csStruct, container);
container.Members.Add(csStruct);
csStruct.Comment = converter.GetCSharpComment(cppTypedef, csStruct);
// Requires System.Runtime.InteropServices
csStruct.Attributes.Add(new CSharpStructLayoutAttribute(LayoutKind.Sequential)
{
CharSet = converter.Options.DefaultCharSet
});
// Required by StructLayout
converter.AddUsing(container, "System.Runtime.InteropServices");
var name = csStruct.Name;
csStruct.Modifiers |= CSharpModifiers.ReadOnly;
csStruct.BaseTypes.Add(new CSharpFreeType($"IEquatable<{name}>"));
// Dump the type name and attached attributes for the element type
var attachedAttributes = string.Empty;
var csElementTypeName = is_size_t ? "IntPtr" : converter.ConvertTypeReferenceToString(csElementType, out attachedAttributes);
csStruct.Members.Add(new CSharpLineElement($"public {name}({csElementTypeName} value) => this.Value = value;"));
csStruct.Members.Add(new CSharpLineElement($"{attachedAttributes}public readonly {csElementTypeName} Value;"));
csStruct.Members.Add(new CSharpLineElement($"public bool Equals({name} other) => Value.Equals(other.Value);"));
csStruct.Members.Add(new CSharpLineElement($"public override bool Equals(object obj) => obj is {name} other && Equals(other);"));
csStruct.Members.Add(new CSharpLineElement($"public override int GetHashCode() => Value.GetHashCode();"));
csStruct.Members.Add(new CSharpLineElement($"public override string ToString() => Value.ToString();"));
csStruct.Members.Add(new CSharpLineElement($"public static implicit operator {csElementTypeName}({name} from) => from.Value;"));
csStruct.Members.Add(new CSharpLineElement($"public static implicit operator {name}({csElementTypeName} from) => new {name}(from);"));
csStruct.Members.Add(new CSharpLineElement($"public static bool operator ==({name} left, {name} right) => left.Equals(right);"));
csStruct.Members.Add(new CSharpLineElement($"public static bool operator !=({name} left, {name} right) => !left.Equals(right);"));
return(csStruct);
}