• Avalanche
  • Avalanche.Core
  • Lexical

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    • Avalanche.Localization
      • Introduction
      • Localization
      • LocalizationFile
      • LocalizationFiles
      • LocalizationFileSystem
      • LocalizationFileFormat
      • LocalizationLine
      • LocalizationLines
      • TemplateFormat
      • CultureProvider
      • FallbackCultureProvider
      • ResourceManager
      • LocalizationError
      • Microsoft.Extensions
        • Introduction
        • DependencyInjection
        • FileProvider
        • Logging
        • ITextLocalizer
        • IFileLocalizer
        • Localization
        • AspNetCore
      • Pluralization
        • Introduction
        • Multiple plural parameters
        • Custom PluralRules
        • Invariant Culture
        • Unit Prefix
        • IPluralRule
        • IPluralNumber
        • IPluralRules
        • CLDRs
        • Unicode.CLDR41
        • Unicode.CLDR40
      • Articles
        • Alphabet localization
        • Benchmarks
        • Caching
        • Class Library
        • Demo
        • Diagnostics
        • Embedded resources
        • Emplacement
        • File localization
        • Text localization
    • Avalanche.Message
      • Introduction
      • IMessage
      • IMessageProvider
      • IMessageDescription
      • IMessageDescriptions
      • MessageLevel
      • Message printing
      • Messages and Exceptions
      • Logging
      • Validation
      • Localization
    • Avalanche.StatusCode
      • Introduction
      • HResult
        • Introduction
        • HResult.Facilities
        • BasicMessages
        • RpcMessages
        • DispatchMessages
        • ItfMessages
        • Win32Messages
        • ClrMessages
      • System
        • Introduction
        • AccessControlMessages
        • AggregateMessages
        • AppDomainMessages
        • ArgumentMessages
        • ArgumentNullMessages
        • ArgumentOutOfRangeMessages
        • ArithmeticMessages
        • ArrayMessages
        • AssemblyMessages
        • BadImageFormatMessages
        • CodeContractMessages
        • CodePageMessages
        • CollectionsMessages
        • CompilerServiceMessages
        • CryptographyMessages
        • CultureMessages
        • DiagnosticsMessages
        • EventSourceMessages
        • ExecutionEngineMessages
        • FormatMessages
        • HostProtectionMessages
        • IOMessages
        • IndexOutOfRangeMessages
        • InteropServiceMessages
        • InvalidCastMessages
        • InvalidOperationMessages
        • IsolatedStorageMessages
        • LazyMessages
        • MarshalerMessages
        • MemoryMessages
        • MiscellaneousMessages
        • NotImplementedMessages
        • NotSupportedMessages
        • ObjectDisposedMessages
        • OperationCanceledMessages
        • OverflowMessages
        • PlatformMessages
        • PolicyMessages
        • PrincipalMessages
        • ProgramMessages
        • ReferenceMessages
        • ReflectionMessages
        • RegionMessages
        • RemotingMessages
        • ResourcesMessages
        • SecurityMessages
        • SerializationMessages
        • StackMessages
        • TaskMessages
        • TextMessages
        • ThreadingMessages
        • TimeZoneMessages
        • TypeMessages
        • XmlMessages
    • Avalanche.Template
      • Introduction
      • TemplateFormats
      • ITemplatePrintable
      • ITemplateFormatPrintable
      • ITemplateText
      • ITemplateBreakdown
      • ITemplateFormat
      • ITemplateFormats
      • Extract Arguments
      • Emplacement
    • Avalanche.Tokenizer
      • Introduction
      • IToken
      • ITokenizer
      • Tokenizers
    • Avalanche.Service
      • Introduction
      • Service
        • IService
        • Construction
        • Query
        • CancellationToken
        • CachePolicy
        • Cast
        • Scope
        • Dispose
      • Handler
        • Introduction
        • IHandler
        • Cancel
        • Recursion
        • Cyclicity
        • Delegates
        • Casting
        • Invokable
        • Handlers
      • Request
        • Introduction
        • IRequest
        • [Request]
        • [ContextParameter]
        • Print Tree
      • Dependency Injection
        • Introduction
        • ServiceRequest<T>
        • Handler
        • CachePolicy
        • CancellationToken
        • QueryLogger
      • Examples
        • Expression Example
        • Mapper Example
      • ServiceMessages
    • Avalanche.Writer
      • Introduction
      • Writer
      • Referer
      • TypeCast
      • DefaultConstructor
      • DelegateWriter
      • WriterPipe
      • ConstantWriter
      • PassthroughWriter
      • Context
      • WriterMessages
    • Avalanche.Accessor
      • Introduction
      • AccessorServices
      • List
        • ListAccessor
        • ListConstructor
        • ListDeconstructor
        • ListDefaultConstructor
        • ListGet
        • ListSet
        • ListAdd
        • ListInsert
        • ListClear
        • ListCount
        • ListIndexOf
        • ListRemoveAt
        • ListReferer
      • Map
        • MapAccessor
        • MapConstructor
        • MapDeconstructor
        • MapDefaultConstructor
        • MapSet
        • MapGet
        • MapRemove
        • MapClear
        • MapCount
        • MapReferer
      • Record
        • RecordAccessor
        • RecordConstructor
        • RecordDeconstructor
        • RecordDefaultConstructor
      • Field
        • FieldAccessor
        • FieldReader
        • FieldWriter
        • FieldReferer
      • Dependency Injection
        • Introduction
      • AccessorMessages
    • Avalanche.Emit
      • Introduction
      • TypeBuilder
      • ConstructorBuilder
      • MethodBuilder
      • PropertyBuilder
      • FieldBuilder
      • Emit
      • Utilities
    • Avalanche.DataType
      • Introduction
      • IDataTypeBase
      • IDataType
      • IRecordType
      • IFieldType
      • IUnionType
      • IListType
      • IMapType
      • IValueType
      • IEnumerationType
      • IIntegerType
      • IRealType
      • IStringType
      • IAnyType
      • DataTypeRequest
      • PrintTree
      • DataTypeMessages
    • Avalanche.FileSystem
      • Introduction
      • Abstractions
        • IFileSystem
          • IFileSystemBrowse
          • IFileSystemCreateDirectory
          • IFileSystemDelete
          • IFileSystemFileAttribute
          • IFileSystemMount
          • IFileSystemMove
          • IFileSystemObserve
          • IFileSystemOpen
        • IEvent
        • IEntry
        • IOption
        • IToken
      • FileSystem
      • VirtualFileSystem
      • MemoryFileSystem
      • EmbeddedFileSystem
      • HttpFileSystem
      • Decoration
      • IFileProvider
      • Events
      • Utilities
        • Dispose
        • File Scanner
        • Visit Tree
        • File Operation
    • Avalanche.Identity
      • Introduction
      • Identity
      • IdentityParts
      • IdentityInterner
      • IdentityComparer
      • Print Tree
      • IdentityAccessors
        • Introduction
        • TypeName
    • Avalanche.Utilities
      • Introduction
      • Collections
        • Tuples
        • StructList
        • ArrayList
        • BijectionMap
        • LocakableDictionary
        • LockableList
        • MapList
        • Pipe
        • RingQueue
        • EnumerableExtensions
        • TupleUtilities
        • ArrayUtilities
      • Comparers
        • IGraphComparer
        • IGraphComparable
        • AlphaNumericComparer
        • EnumerableComparer
        • EnumerableGraphComparer
        • ReferenceComparer
        • KeyValuePairComparer
        • DefaultComparerProvider
        • RecordComparer
      • Cloners
        • ICloner
        • IGraphCloner
        • IGraphCloneable
        • EnumerableCloner
        • FieldCloner
        • PassthroughCloner
        • RecordCloner
        • ClonerProvider
      • Dispose
        • IDisposeAttachable
        • IDisposeBelatable
      • Provider
        • Introduction
        • ProviderBase
        • Delegate
        • Concatenation
        • Cache
        • ResultCapture
        • AsReadOnly
        • AsService
      • Record
        • IRecordDescription
        • IFieldDescription
        • IConstructorDescription
        • IConstructionDescription
        • IParameterDescription
        • IRecordProviders
        • RecordDelegates
          • RecordCreate
          • RecordClone
          • RecordCopy
          • IRecordDelegates
        • FieldDelegates
          • FieldRead
          • FieldWrite
          • RecreateWith
          • IFieldDelegates
      • String
        • IEscaper
        • UnicodeString
      • Miscellaneous
        • IIdGenerator
        • Permutation
        • IReadOnly
        • IUserDataContainer
        • Void
    • Avalanche.Core
      • License
      • Order

    DelegateWriter

    DelegateWriter.Func() adapts two argument Func<From, To> to IWriterToRef<From, To>.

    IWriterToRef<int, int> writer =
        DelegateWriter.Func(
            (int x) => x * x
        );
    

    DelegateWriter.Action() adapts two argument Action<From, To> to IWriter<From, To>

    IWriter<MyClass, string> writer =
        DelegateWriter.Action(
            (MyClass myClass, string value) => myClass.Print(value)
        );
    

    DelegateWriter.Invoke() adapts one argument Action<T>.

    IWriter<Avalanche.Void, MyClass> writer =
        DelegateWriter.Invoke(
            (MyClass myClass) => Console.WriteLine(myClass)
        );
    

    DelegateWriter.Reader() adapts delegate to IWriterToRef<From, To>.

    IWriterToRef<(string, int), MyClass> writer =
        DelegateWriter.Reader(
            ((string, int) args) => new MyClass(args.Item1, args.Item2)
        );
    

    ref From can be used to adapt to IWriterFromRefToRef<From, To>.

    IWriterFromRefToRef<(string, int), MyClass> writer =
        DelegateWriter.Reader(
            (ref (string, int) args) => new MyClass(args.Item1, args.Item2)
        );
    

    IServiceProvider can be used as argument.

    IWriterToRef<(string, int), MyClass> writer =
        DelegateWriter.Reader(
            ((string, int) args, IServiceProvider? ctx) => new MyClass(args.Item1, args.Item2)
        );
    

    DelegateWriter.Writer() also delegate to IWriter<From, To>, IWriterFromRef<From, To>, IWriterToRef<From, To> and IWriterFromRefToRef<From, To>.

    IWriterToRef<(string, int), MyClass> writer =
        DelegateWriter.Writer(
            ((string, int) args, ref MyClass to) => { to = new MyClass(args.Item1, args.Item2); }
        );
    

    The delegate can return bool if writer cannot be applied to arguments.

    IWriterToRef<(string, int), MyClass> writer =
        DelegateWriter.Writer(
            ((string, int) args, ref MyClass to) =>
            {
                // Assert not null
                if (args.Item1 == null) return false;
                // Assign value
                to = new MyClass(args.Item1, args.Item2);
                // Ok
                return true;
            }
        );
    
    IWriterFromRefToRef<(string, int), MyClass> writer =
        DelegateWriter.Writer(
            (ref (string, int) args, ref MyClass to) =>
            {
                // Assert not null
                if (args.Item1 == null) return false;
                // Assign value
                to = new MyClass(args.Item1, args.Item2);
                // Ok
                return true;
            }
        );
    

    IServiceProvider can be used in the delegate for acquiring contextual arguments.

    IWriterToRef<(string, int), MyClass> writer =
        DelegateWriter.Writer(
            ((string, int) args, ref MyClass to, IServiceProvider? context) =>
            {
                // Assert not null
                if (args.Item1 == null) return false;
                // Assign value
                to = new MyClass(args.Item1, args.Item2);
                // Ok
                return true;
            }
        );
    

    DelegateReferer

    DelegateWriter.Refer() adapts delegate to IReferer<From, To> when reading from a class.

    IReferer<MyClass, string> referer =
        DelegateWriter.Refer(
            (MyClass myClass) => ref myClass.label
        );
    

    DelegateWriter.Refer() adapts delegate to IRefererFromRef<From, To> when reading from a struct.

    IRefererFromRef<MyStruct, string> referer =
        DelegateWriter.Refer(
            (ref MyStruct myStruct) => ref myStruct.label
        );
    

    Full Example

    Full example
    using System;
    using Avalanche.Writer;
    
    class delegatewriter
    {
        public static void Run()
        {
            {
                // <01>
                IWriterToRef<(string, int), MyClass> writer =
                    DelegateWriter.Reader(
                        ((string, int) args) => new MyClass(args.Item1, args.Item2)
                    );
                // </01>
            }
            {
                // <01B>
                IWriterFromRefToRef<(string, int), MyClass> writer =
                    DelegateWriter.Reader(
                        (ref (string, int) args) => new MyClass(args.Item1, args.Item2)
                    );
                // </01B>
            }
            {
                // <01C>
                IWriterToRef<(string, int), MyClass> writer =
                    DelegateWriter.Reader(
                        ((string, int) args, IServiceProvider? ctx) => new MyClass(args.Item1, args.Item2)
                    );
                // </01C>
            }
            {
                // <02>
                IWriterToRef<(string, int), MyClass> writer =
                    DelegateWriter.Writer(
                        ((string, int) args, ref MyClass to) => { to = new MyClass(args.Item1, args.Item2); }
                    );
                // </02>
            }
            {
                // <03>
                IWriterToRef<(string, int), MyClass> writer =
                    DelegateWriter.Writer(
                        ((string, int) args, ref MyClass to) =>
                        {
                            // Assert not null
                            if (args.Item1 == null) return false;
                            // Assign value
                            to = new MyClass(args.Item1, args.Item2);
                            // Ok
                            return true;
                        }
                    );
                // </03>
            }
            {
                // <05>
                IWriterFromRefToRef<(string, int), MyClass> writer =
                    DelegateWriter.Writer(
                        (ref (string, int) args, ref MyClass to) =>
                        {
                            // Assert not null
                            if (args.Item1 == null) return false;
                            // Assign value
                            to = new MyClass(args.Item1, args.Item2);
                            // Ok
                            return true;
                        }
                    );
                // </05>
            }
            {
                // <04>
                IWriterToRef<(string, int), MyClass> writer =
                    DelegateWriter.Writer(
                        ((string, int) args, ref MyClass to, IServiceProvider? context) =>
                        {
                            // Assert not null
                            if (args.Item1 == null) return false;
                            // Assign value
                            to = new MyClass(args.Item1, args.Item2);
                            // Ok
                            return true;
                        }
                    );
                // </04>
            }
            {
                // <10>
                IWriter<Avalanche.Void, MyClass> writer =
                    DelegateWriter.Invoke(
                        (MyClass myClass) => Console.WriteLine(myClass)
                    );
                // </10>
                MyClass myClass = new MyClass("A", 1);
                writer.Write(default, myClass);
            }
            {
                // <11>
                IWriterToRef<int, int> writer =
                    DelegateWriter.Func(
                        (int x) => x * x
                    );
                // </11>
            }
            {
                // <12>
                IWriter<MyClass, string> writer =
                    DelegateWriter.Action(
                        (MyClass myClass, string value) => myClass.Print(value)
                    );
                // </12>
            }
            {
                // <13>
                IReferer<MyClass, string> referer =
                    DelegateWriter.Refer(
                        (MyClass myClass) => ref myClass.label
                    );
                // </13>
                MyClass myClass = new MyClass("A", 1);
                ref string label = ref referer.GetReference(myClass);
    
                object box = myClass;
                IReferer<object, string> refererFromObject = (IReferer<object, string>)referer;
                ref string label2 = ref refererFromObject.GetReference(box);
            }
            {
                // <14>
                IRefererFromRef<MyStruct, string> referer =
                    DelegateWriter.Refer(
                        (ref MyStruct myStruct) => ref myStruct.label
                    );
                // </14>
                MyStruct myStruct = new MyStruct("A", 1);
                ref string label = ref referer.GetReference(ref myStruct);
    
                object box = myStruct;
                IReferer<object, string> refererFromObject = (IReferer<object, string>)referer;
                ref string label2 = ref refererFromObject.GetReference(box);
            }
        }
    
        public record MyClass
        {
            public string label;
            public int id;
    
            public MyClass(string label, int id) { this.label = label; this.id = id; }
    
            public void Print(string value) { }
        }
        public record struct MyStruct
        {
            public string label;
            public int id;
    
            public MyStruct(string label, int id) { this.label = label; this.id = id; }
    
            public void Print(string value) { }
        }
    }
    
    
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