Class Func

Provides extension methods for delegate and predefined functions.

Inheritance
Object
Func
Namespace: DotNext
Assembly: DotNext.dll
Syntax
public static class Func : object

Methods

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AsConverter<I, O>(Func<I, O>)

Converts into .

Declaration
public static Converter<I, O> AsConverter<I, O>(this Func<I, O> function)
Parameters
Type Name Description
DotNext.Func<I, O> function

The function to convert.
Returns
Type Description
DotNext.Converter<I, O>

A delegate of type referencing the same method as original delegate.
Type Parameters
Name Description
I

Type of input argument.
O

Return type of the converter.
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AsPredicate<T>(Func<T, Boolean>)

Converts into predicate.

Declaration
public static Predicate<T> AsPredicate<T>(this Func<T, bool> predicate)
Parameters
Type Name Description
DotNext.Func<T, Boolean> predicate

A delegate to convert.
Returns
Type Description
DotNext.Predicate<T>

A delegate of type referencing the same method as original delegate.
Type Parameters
Name Description
T

Type of predicate argument.
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Identity<T>()

The converter which returns input argument without any modifications.

Declaration
public static Func<T, T> Identity<T>()
Returns
Type Description
DotNext.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.

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Identity<I, O>()

The function which returns input argument without any modifications.

Declaration
public static Func<I, O> Identity<I, O>()

    where I : O
Returns
Type Description
DotNext.Func<I, O>

The identity function.
Type Parameters
Name Description
I

Type of input.
O

Type of output.
Remarks

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

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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
DotNext.Func<T, Boolean>

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.

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IsNull<T>()

Returns predicate implementing nullability check.

Declaration
public static Func<T, bool> IsNull<T>()

    where T : class
Returns
Type Description
DotNext.Func<T, Boolean>

The predicate instance.
Type Parameters
Name Description
T

Type of predicate argument.
Remarks

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

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TryInvoke<R>(Func<R>)

Invokes function without throwing the exception.

Declaration
public static Result<R> TryInvoke<R>(this Func<R> function)
Parameters
Type Name Description
DotNext.Func<R> function

The function to invoke.
Returns
Type Description
Result<R>

The invocation result.
Type Parameters
Name Description
R

The result type.
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TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, T9, R>(Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, R>, T1, T2, T3, T4, T5, T6, T7, T8, T9)

Invokes function without throwing the exception.

Declaration
public static Result<R> TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, T9, R>(this Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, R> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9)
Parameters
Type Name Description
DotNext.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, R> 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<R>

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.
R

The result type.
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TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, R>(Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, R>, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10)

Invokes function without throwing the exception.

Declaration
public static Result<R> TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, R>(this Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, R> 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
DotNext.Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, R> 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<R>

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.
R

The result type.
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TryInvoke<T, R>(Func<T, R>, T)

Invokes function without throwing the exception.

Declaration
public static Result<R> TryInvoke<T, R>(this Func<T, R> function, T arg)
Parameters
Type Name Description
DotNext.Func<T, R> function

The function to invoke.
T arg

The first function argument.
Returns
Type Description
Result<R>

The invocation result.
Type Parameters
Name Description
T

The type of the first function argument.
R

The result type.
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TryInvoke<T1, T2, R>(Func<T1, T2, R>, T1, T2)

Invokes function without throwing the exception.

Declaration
public static Result<R> TryInvoke<T1, T2, R>(this Func<T1, T2, R> function, T1 arg1, T2 arg2)
Parameters
Type Name Description
DotNext.Func<T1, T2, R> function

The function to invoke.
T1 arg1

The first function argument.
T2 arg2

The second function argument.
Returns
Type Description
Result<R>

The invocation result.
Type Parameters
Name Description
T1

The type of the first function argument.
T2

The type of the second function argument.
R

The result type.
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TryInvoke<T1, T2, T3, R>(Func<T1, T2, T3, R>, T1, T2, T3)

Invokes function without throwing the exception.

Declaration
public static Result<R> TryInvoke<T1, T2, T3, R>(this Func<T1, T2, T3, R> function, T1 arg1, T2 arg2, T3 arg3)
Parameters
Type Name Description
DotNext.Func<T1, T2, T3, R> 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<R>

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.
R

The result type.
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TryInvoke<T1, T2, T3, T4, R>(Func<T1, T2, T3, T4, R>, T1, T2, T3, T4)

Invokes function without throwing the exception.

Declaration
public static Result<R> TryInvoke<T1, T2, T3, T4, R>(this Func<T1, T2, T3, T4, R> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4)
Parameters
Type Name Description
DotNext.Func<T1, T2, T3, T4, R> 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<R>

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.
R

The result type.
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TryInvoke<T1, T2, T3, T4, T5, R>(Func<T1, T2, T3, T4, T5, R>, T1, T2, T3, T4, T5)

Invokes function without throwing the exception.

Declaration
public static Result<R> TryInvoke<T1, T2, T3, T4, T5, R>(this Func<T1, T2, T3, T4, T5, R> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5)
Parameters
Type Name Description
DotNext.Func<T1, T2, T3, T4, T5, R> 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<R>

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.
R

The result type.
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TryInvoke<T1, T2, T3, T4, T5, T6, R>(Func<T1, T2, T3, T4, T5, T6, R>, T1, T2, T3, T4, T5, T6)

Invokes function without throwing the exception.

Declaration
public static Result<R> TryInvoke<T1, T2, T3, T4, T5, T6, R>(this Func<T1, T2, T3, T4, T5, T6, R> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6)
Parameters
Type Name Description
DotNext.Func<T1, T2, T3, T4, T5, T6, R> 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<R>

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.
R

The result type.
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TryInvoke<T1, T2, T3, T4, T5, T6, T7, R>(Func<T1, T2, T3, T4, T5, T6, T7, R>, T1, T2, T3, T4, T5, T6, T7)

Invokes function without throwing the exception.

Declaration
public static Result<R> TryInvoke<T1, T2, T3, T4, T5, T6, T7, R>(this Func<T1, T2, T3, T4, T5, T6, T7, R> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7)
Parameters
Type Name Description
DotNext.Func<T1, T2, T3, T4, T5, T6, T7, R> 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<R>

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.
R

The result type.
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TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, R>(Func<T1, T2, T3, T4, T5, T6, T7, T8, R>, T1, T2, T3, T4, T5, T6, T7, T8)

Invokes function without throwing the exception.

Declaration
public static Result<R> TryInvoke<T1, T2, T3, T4, T5, T6, T7, T8, R>(this Func<T1, T2, T3, T4, T5, T6, T7, T8, R> function, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8)
Parameters
Type Name Description
DotNext.Func<T1, T2, T3, T4, T5, T6, T7, T8, R> 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<R>

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.
R

The result type.