petsc-3.9.4 2018-09-11
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Gets the enum value for a particular option in the database.


#include "petscsys.h"   
PetscErrorCode  PetscOptionsGetEnum(PetscOptions options,const char pre[],const char opt[],const char * const *list,PetscEnum *value,PetscBool  *set)
Not Collective

Input Parameters

options - options database, use NULL for default global database
pre - option prefix or NULL
opt - option name
list - array containing the list of choices, followed by the enum name, followed by the enum prefix, followed by a null
defaultv - the default (current) value

Output Parameter

value - the value to return
set - PETSC_TRUE if found, else PETSC_FALSE

Notes: If the user does not supply the option value is NOT changed. Thus you should ALWAYS initialize the ivalue if you access it without first checking if the set flag is true.

List is usually something like PCASMTypes or some other predefined list of enum names

See Also

PetscOptionsGetReal(), PetscOptionsHasName(), PetscOptionsGetString(), PetscOptionsGetInt(),
PetscOptionsGetIntArray(), PetscOptionsGetRealArray(), PetscOptionsBool() PetscOptionsInt(), PetscOptionsString(), PetscOptionsReal(), PetscOptionsBool(), PetscOptionsName(), PetscOptionsBegin(), PetscOptionsEnd(), PetscOptionsHead(), PetscOptionsStringArray(),PetscOptionsRealArray(), PetscOptionsScalar(), PetscOptionsBoolGroupBegin(), PetscOptionsBoolGroup(), PetscOptionsBoolGroupEnd(), PetscOptionsFList(), PetscOptionsEList(), PetscOptionsGetEList(), PetscOptionsEnum()







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