# TaoLineSearchIsUsingTaoRoutines
Checks whether the line search is using Tao evaluation routines. 
## Synopsis
```
#include "petsctaolinesearch.h" 
PetscErrorCode TaoLineSearchIsUsingTaoRoutines(TaoLineSearch ls, PetscBool *flg)
```
Not Collective


## Input Parameter

- ***ls -*** the TaoLineSearch context



## Output Parameter

- ***flg -*** PETSC_TRUE if the line search is using Tao evaluation routines,
otherwise PETSC_FALSE




## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/linesearch/interface/taolinesearch.c.html#TaoLineSearchIsUsingTaoRoutines">src/tao/linesearch/interface/taolinesearch.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/tao/linesearch/interface/taolinesearch.c)


[Index of all TaoLineSearch routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
