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# PetscFunctionListDuplicate
Creates a new list from a given function list `PetscFunctionList`. 
## Synopsis
```
#include "petscsys.h" 
PetscErrorCode PetscFunctionListDuplicate(PetscFunctionList fl, PetscFunctionList *nl)
```

## Input Parameter

- ***fl   -*** pointer to list



## Output Parameter

- ***nl -*** the new list (should point to `NULL` to start, otherwise appends)





## See Also
 `PetscFunctionList`, `PetscFunctionListAdd()`, `PetscFlistDestroy()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/dll/reg.c.html#PetscFunctionListDuplicate">src/sys/dll/reg.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/dll/reg.c)


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