KernelFunction

KernelFunction[f]

represents a function to be evaluated in the Wolfram Language kernel, even when called from compiled code.

Details

  • The function f in KernelFunction[f] can be a built-in Wolfram Language function, a Function object or a function with definitions given by the user.
  • Typically, KernelFunction is wrapped in TypeHint to specify the type of the function.
  • FunctionDeclaration[fcomp,Typed[KernelFunction[feval],argTysresTy]] is shorthand for declaring a function that evaluates feval using the Wolfram Engine within the compiled function fcomp.

Examples

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Basic Examples  (2)

Use the Wolfram Engine evaluator to compute the AiryAi function from compiled code:

Execute the compiled function:

The result compares with the direct call:

Call a pure function that executes with the evaluator:

Define a function in the Wolfram Engine:

Call the function from compiled code:

Scope  (4)

Use the result of KernelFunction as an internal function:

A KernelFunction can return a function:

Returning a function from KernelFunction allows operations such as Fit to be integrated into the compiler:

The function returned from KernelFunction can itself be dynamically compiled:

Use KernelFunction to integrate file operations:

Properties & Relations  (1)

Use KernelFunction alongside FunctionDeclaration to declare functions that require the evaluator:

Possible Issues  (1)

Not all Wolfram Language symbols are currently supported by the compiler:

If necessary, functions can be declared using KernelFunction to call such functions from compiled code:

Neat Examples  (1)

Integrate NDSolve into compiled code:

Wolfram Research (2019), KernelFunction, Wolfram Language function, https://reference.wolfram.com/language/ref/KernelFunction.html.

Text

Wolfram Research (2019), KernelFunction, Wolfram Language function, https://reference.wolfram.com/language/ref/KernelFunction.html.

CMS

Wolfram Language. 2019. "KernelFunction." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/KernelFunction.html.

APA

Wolfram Language. (2019). KernelFunction. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/KernelFunction.html

BibTeX

@misc{reference.wolfram_2025_kernelfunction, author="Wolfram Research", title="{KernelFunction}", year="2019", howpublished="\url{https://reference.wolfram.com/language/ref/KernelFunction.html}", note=[Accessed: 25-May-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_kernelfunction, organization={Wolfram Research}, title={KernelFunction}, year={2019}, url={https://reference.wolfram.com/language/ref/KernelFunction.html}, note=[Accessed: 25-May-2025 ]}