public ClrType GetOrCreateBasicType()

in src/Microsoft.Diagnostics.Runtime/Implementation/ClrTypeFactory.cs [306:371]
56 lines of code
9 McCabe index (conditional complexity)

        public ClrType GetOrCreateBasicType(ClrElementType basicType)
        {
            ClrModule bcl = _heap.Runtime.BaseClassLibrary;

            // We'll assume 'Class' is just System.Object
            if (basicType == ClrElementType.Class)
                basicType = ClrElementType.Object;

            ClrType?[]? basicTypes = _basicTypes;
            if (basicTypes is null)
            {
                basicTypes = new ClrType[(int)ClrElementType.SZArray];
                int count = 0;
                if (bcl.MetadataReader != null)
                {
                    foreach ((ulong mt, int _) in bcl.EnumerateTypeDefToMethodTableMap())
                    {
                        string? name = _typeHelpers.GetTypeName(0, mt, 0);
                        ClrElementType type = name switch
                        {
                            "System.Void" => ClrElementType.Void,
                            "System.Boolean" => ClrElementType.Boolean,
                            "System.Char" => ClrElementType.Char,
                            "System.SByte" => ClrElementType.Int8,
                            "System.Byte" => ClrElementType.UInt8,
                            "System.Int16" => ClrElementType.Int16,
                            "System.UInt16" => ClrElementType.UInt16,
                            "System.Int32" => ClrElementType.Int32,
                            "System.UInt32" => ClrElementType.UInt32,
                            "System.Int64" => ClrElementType.Int64,
                            "System.UInt64" => ClrElementType.UInt64,
                            "System.Single" => ClrElementType.Float,
                            "System.Double" => ClrElementType.Double,
                            "System.IntPtr" => ClrElementType.NativeInt,
                            "System.UIntPtr" => ClrElementType.NativeUInt,
                            "System.ValueType" => ClrElementType.Struct,
                            _ => ClrElementType.Unknown,
                        };

                        if (type != ClrElementType.Unknown)
                        {
                            basicTypes[(int)type - 1] = GetOrCreateType(mt, 0);
                            count++;

                            if (count == 16)
                                break;
                        }
                    }
                }

                basicTypes[(int)ClrElementType.Object] = _heap.ObjectType;
                basicTypes[(int)ClrElementType.String] = _heap.StringType;

                Interlocked.CompareExchange(ref _basicTypes, basicTypes, null);
            }

            int index = (int)basicType - 1;
            if (index < 0 || index > basicTypes.Length)
                throw new ArgumentException($"Cannot create type for ClrElementType {basicType}");

            ClrType? result = basicTypes[index];
            if (result is not null)
                return result;

            return basicTypes[index] = new ClrPrimitiveType(_typeHelpers, bcl, _heap, basicType);
        }