Class Func

Provides extension methods for delegate Func<TResult> and predefined functions.

Inheritance

object

Func

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: DotNext

Assembly: DotNext.dll

Syntax

public static class Func

Methods

AsConverter<TInput, TOutput>(Func<TInput, TOutput>)

Converts Func<T, TResult> into Converter<TInput, TOutput>.

Declaration

public static Converter<TInput, TOutput> AsConverter<TInput, TOutput>(this Func<TInput, TOutput> function)

Parameters

Type	Name	Description
Func<TInput, TOutput>	function	The function to convert.

Returns

Type	Description
Converter<TInput, TOutput>	A delegate of type Converter<TInput, TOutput> referencing the same method as original delegate.

Type Parameters

Name	Description
TInput	Type of input argument.
TOutput	Return type of the converter.

AsPredicate<T>(Func<T, bool>)

Converts Func<T, TResult> into predicate.

Declaration

public static Predicate<T> AsPredicate<T>(this Func<T, bool> predicate)

Parameters

Type	Name	Description
Func<T, bool>	predicate	A delegate to convert.

Returns

Type	Description
Predicate<T>	A delegate of type Predicate<T> referencing the same method as original delegate.

Type Parameters

Name	Description
T	Type of predicate argument.

Constant<T>(T)

Constructs Func<TResult> returning the same instance each call.

Declaration

public static Func<T> Constant<T>(T obj)

Parameters

Type	Name	Description
T	obj	The object to be returned from the delegate.

Returns

Type	Description
Func<T>	The delegate returning obj each call.

Type Parameters

Name	Description
T	The type of the object to be returned from the delegate.

Identity<T>()

The converter which returns input argument without any modifications.

Declaration

public static Func<T, T> Identity<T>()

Returns

Type	Description
Func<T, T>	The identity function.

Type Parameters

Name	Description
T	Type of input and output.

Remarks

This method returns the same instance of predicate on every call.

Identity<T>(Action<T>)

Represents Action<T> as Func<T, TResult> which doesn't modify the input value.

Declaration

public static Func<T, T> Identity<T>(this Action<T> action)

Parameters

Type	Name	Description
Action<T>	action	The action to be converted.

Returns

Type	Description
Func<T, T>	Func<T, TResult> that wraps action.

Type Parameters

Name	Description
T	The type of the element.

Identity<TInput, TOutput>()

The function which returns input argument without any modifications.

Declaration

public static Func<TInput, TOutput> Identity<TInput, TOutput>() where TInput : TOutput

Returns

Type	Description
Func<TInput, TOutput>	The identity function.

Type Parameters

Name	Description
TInput	Type of input.
TOutput	Type of output.

Remarks

This method returns the same instance of predicate on every call.

IsNotNull<T>()

Returns predicate checking that input argument is not null.

Declaration

public static Func<T, bool> IsNotNull<T>() where T : class?

Returns

Type	Description
Func<T, bool>	The predicate instance.

Type Parameters

Name	Description
T	Type of the predicate argument.

Remarks

This method returns the same instance of predicate on every call.

IsNull<T>()

Returns predicate implementing nullability check.

Declaration

public static Func<T, bool> IsNull<T>() where T : class?

Returns

Type	Description
Func<T, bool>	The predicate instance.

Type Parameters

Name	Description
T	Type of predicate argument.

Remarks

This method returns the same instance of predicate on every call.

IsTypeOf<T>()

Gets a predicate that can be used to check whether the specified object is of specific type.

Declaration

public static Func<object?, bool> IsTypeOf<T>()

Returns

Type	Description
Func<object, bool>	The predicate instance.

Type Parameters

Name	Description
T	The target type.

TryInvoke<TResult>(Func<TResult>)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<TResult>(this Func<TResult> function)

Parameters

Type	Name	Description
Func<TResult>	function	The function to invoke.

Returns

Type	Description
Result<TResult>	The invocation result.

Type Parameters

Name	Description
TResult	The result type.

TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult>(Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult>, T1, T2, T3, T4, T5, T6, T7, T8, T9)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult>(this Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9)

Parameters

Type	Name	Description
Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult>	function	The function to invoke.
T1	arg1	The first function argument.
T2	arg2	The second function argument.
T3	arg3	The third function argument.
T4	arg4	The fourth function argument.
T5	arg5	The fifth function argument.
T6	arg6	The sixth function argument.
T7	arg7	The seventh function argument.
T8	arg8	The eighth function argument.
T9	arg9	The ninth function argument.

Returns

Type	Description
Result<TResult>	The invocation result.

Type Parameters

Name	Description
T1	The type of the first function argument.
T2	The type of the second function argument.
T3	The type of the third function argument.
T4	The type of the fourth function argument.
T5	The type of the fifth function argument.
T6	The type of the sixth function argument.
T7	The type of the seventh function argument.
T8	The type of the eighth function argument.
T9	The type of the ninth function argument.
TResult	The result type.

TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TResult>(Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TResult>, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TResult>(this Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9, T10 arg10)

Parameters

Type	Name	Description
Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, TResult>	function	The function to invoke.
T1	arg1	The first function argument.
T2	arg2	The second function argument.
T3	arg3	The third function argument.
T4	arg4	The fourth function argument.
T5	arg5	The fifth function argument.
T6	arg6	The sixth function argument.
T7	arg7	The seventh function argument.
T8	arg8	The eighth function argument.
T9	arg9	The ninth function argument.
T10	arg10	The tenth function argument.

Returns

Type	Description
Result<TResult>	The invocation result.

Type Parameters

Name	Description
T1	The type of the first function argument.
T2	The type of the second function argument.
T3	The type of the third function argument.
T4	The type of the fourth function argument.
T5	The type of the fifth function argument.
T6	The type of the sixth function argument.
T7	The type of the seventh function argument.
T8	The type of the eighth function argument.
T9	The type of the ninth function argument.
T10	The type of the tenth function argument.
TResult	The result type.

TryInvoke<T, TResult>(Func<T, TResult>, T)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T, TResult>(this Func<T, TResult> function, T arg)

Parameters

Type	Name	Description
Func<T, TResult>	function	The function to invoke.
T	arg	The first function argument.

Returns

Type	Description
Result<TResult>	The invocation result.

Type Parameters

Name	Description
T	The type of the first function argument.
TResult	The result type.

TryInvoke<T1, T2, TResult>(Func<T1, T2, TResult>, T1, T2)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, TResult>(this Func<T1, T2, TResult> function, T1 arg1, T2 arg2)

Parameters

Type	Name	Description
Func<T1, T2, TResult>	function	The function to invoke.
T1	arg1	The first function argument.
T2	arg2	The second function argument.

Returns

Type	Description
Result<TResult>	The invocation result.

Type Parameters

Name	Description
T1	The type of the first function argument.
T2	The type of the second function argument.
TResult	The result type.

TryInvoke<T1, T2, T3, TResult>(Func<T1, T2, T3, TResult>, T1, T2, T3)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, TResult>(this Func<T1, T2, T3, TResult> function, T1 arg1, T2 arg2, T3 arg3)

Parameters

Type	Name	Description
Func<T1, T2, T3, TResult>	function	The function to invoke.
T1	arg1	The first function argument.
T2	arg2	The second function argument.
T3	arg3	The third function argument.

Returns

Type	Description
Result<TResult>	The invocation result.

Type Parameters

Name	Description
T1	The type of the first function argument.
T2	The type of the second function argument.
T3	The type of the third function argument.
TResult	The result type.

TryInvoke<T1, T2, T3, T4, TResult>(Func<T1, T2, T3, T4, TResult>, T1, T2, T3, T4)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, TResult>(this Func<T1, T2, T3, T4, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4)

Parameters

Type	Name	Description
Func<T1, T2, T3, T4, TResult>	function	The function to invoke.
T1	arg1	The first function argument.
T2	arg2	The second function argument.
T3	arg3	The third function argument.
T4	arg4	The fourth function argument.

Returns

Type	Description
Result<TResult>	The invocation result.

Type Parameters

Name	Description
T1	The type of the first function argument.
T2	The type of the second function argument.
T3	The type of the third function argument.
T4	The type of the fourth function argument.
TResult	The result type.

TryInvoke<T1, T2, T3, T4, T5, TResult>(Func<T1, T2, T3, T4, T5, TResult>, T1, T2, T3, T4, T5)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, T5, TResult>(this Func<T1, T2, T3, T4, T5, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5)

Parameters

Type	Name	Description
Func<T1, T2, T3, T4, T5, TResult>	function	The function to invoke.
T1	arg1	The first function argument.
T2	arg2	The second function argument.
T3	arg3	The third function argument.
T4	arg4	The fourth function argument.
T5	arg5	The fifth function argument.

Returns

Type	Description
Result<TResult>	The invocation result.

Type Parameters

Name	Description
T1	The type of the first function argument.
T2	The type of the second function argument.
T3	The type of the third function argument.
T4	The type of the fourth function argument.
T5	The type of the fifth function argument.
TResult	The result type.

TryInvoke<T1, T2, T3, T4, T5, T6, TResult>(Func<T1, T2, T3, T4, T5, T6, TResult>, T1, T2, T3, T4, T5, T6)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, T5, T6, TResult>(this Func<T1, T2, T3, T4, T5, T6, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6)

Parameters

Type	Name	Description
Func<T1, T2, T3, T4, T5, T6, TResult>	function	The function to invoke.
T1	arg1	The first function argument.
T2	arg2	The second function argument.
T3	arg3	The third function argument.
T4	arg4	The fourth function argument.
T5	arg5	The fifth function argument.
T6	arg6	The sixth function argument.

Returns

Type	Description
Result<TResult>	The invocation result.

Type Parameters

Name	Description
T1	The type of the first function argument.
T2	The type of the second function argument.
T3	The type of the third function argument.
T4	The type of the fourth function argument.
T5	The type of the fifth function argument.
T6	The type of the sixth function argument.
TResult	The result type.

TryInvoke<T1, T2, T3, T4, T5, T6, T7, TResult>(Func<T1, T2, T3, T4, T5, T6, T7, TResult>, T1, T2, T3, T4, T5, T6, T7)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, T5, T6, T7, TResult>(this Func<T1, T2, T3, T4, T5, T6, T7, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7)

Parameters

Type	Name	Description
Func<T1, T2, T3, T4, T5, T6, T7, TResult>	function	The function to invoke.
T1	arg1	The first function argument.
T2	arg2	The second function argument.
T3	arg3	The third function argument.
T4	arg4	The fourth function argument.
T5	arg5	The fifth function argument.
T6	arg6	The sixth function argument.
T7	arg7	The seventh function argument.

Returns

Type	Description
Result<TResult>	The invocation result.

Type Parameters

Name	Description
T1	The type of the first function argument.
T2	The type of the second function argument.
T3	The type of the third function argument.
T4	The type of the fourth function argument.
T5	The type of the fifth function argument.
T6	The type of the sixth function argument.
T7	The type of the seventh function argument.
TResult	The result type.

TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, TResult>(Func<T1, T2, T3, T4, T5, T6, T7, T8, TResult>, T1, T2, T3, T4, T5, T6, T7, T8)

Invokes function without throwing the exception.

Declaration

public static Result<TResult> TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, TResult>(this Func<T1, T2, T3, T4, T5, T6, T7, T8, TResult> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8)

Parameters

Type	Name	Description
Func<T1, T2, T3, T4, T5, T6, T7, T8, TResult>	function	The function to invoke.
T1	arg1	The first function argument.
T2	arg2	The second function argument.
T3	arg3	The third function argument.
T4	arg4	The fourth function argument.
T5	arg5	The fifth function argument.
T6	arg6	The sixth function argument.
T7	arg7	The seventh function argument.
T8	arg8	The eighth function argument.

Returns

Type	Description
Result<TResult>	The invocation result.

Type Parameters

Name	Description
T1	The type of the first function argument.
T2	The type of the second function argument.
T3	The type of the third function argument.
T4	The type of the fourth function argument.
T5	The type of the fifth function argument.
T6	The type of the sixth function argument.
T7	The type of the seventh function argument.
T8	The type of the eighth function argument.
TResult	The result type.