PetscOptionsEList#
Puts a list of option values that a single one may be selected from
Synopsis#
#include <petscoptions.h>
PetscErrorCode PetscOptionsEList(const char opt[], const char ltext[], const char man[], const char *const *list, PetscInt ntext, const char currentvalue[], PetscInt *value, PetscBool *set)
Logically Collective on the communicator passed in PetscOptionsBegin()
Input Parameters#
- opt - option name 
- ltext - short string that describes the option 
- man - manual page with additional information on option 
- list - the possible choices (one of these must be selected, anything else is invalid) 
- ntext - number of choices 
- currentvalue - the current value; caller is responsible for setting this value correctly. Normally this is done with 
                 PetscOptionsEList(..., obj->value,&value,&set);
Output Parameters#
- value - the index of the value to return 
- set - - PETSC_TRUEif found, else- PETSC_FALSE
Notes#
Must be used between a PetscOptionsBegin() and a PetscOptionsEnd()
If the user does not supply the option at all value is NOT changed. Thus
you should ALWAYS initialize value if you access it without first checking that the set flag is PETSC_TRUE.
See PetscOptionsFList() for when the choices are given in a PetscFunctionList()
See Also#
PetscOptionsGetInt(), PetscOptionsGetReal(),
PetscOptionsHasName(), PetscOptionsGetIntArray(), PetscOptionsGetRealArray(), PetscOptionsBool(),
PetscOptionsName(), PetscOptionsBegin(), PetscOptionsEnd(), PetscOptionsHeadBegin(),
PetscOptionsStringArray(), PetscOptionsRealArray(), PetscOptionsScalar(),
PetscOptionsBoolGroupBegin(), PetscOptionsBoolGroup(), PetscOptionsBoolGroupEnd(),
PetscOptionsFList(), PetscOptionsEnum()
Level#
intermediate
Location#
Examples#
src/snes/tutorials/ex36.c
src/ksp/ksp/tutorials/ex32.c
src/snes/tutorials/ex12.c
src/snes/tutorials/ex62.c
src/ksp/ksp/tutorials/ex35.cxx
src/ksp/ksp/tutorials/ex36.cxx
src/snes/tutorials/ex17.c
src/ksp/ksp/tutorials/ex73.c
src/ksp/ksp/tutorials/ex29.c
src/ksp/ksp/tutorials/ex71.c
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