Set

class ampl::Set

Represents an AMPL set.

In case of not indexed sets, this class exposes iterators for accessing its elements. The members of the set are tuples, represented by objects of class ampl::Tuple.

All these methods throw an std::logic_error if called for an indexed set.

In case of indexed sets, you can gain access to the instances (of class ampl::SetInstance) using the methods Set::get(), using the operator Set::operator[]() or via Set::instances(), which returns an InstanceList providing iterators.

Data can be assigned to the set using the methods Set::setValues (for non-indexed sets only) or using ampl::setData and an object of class ampl::DataFrame.

Instance access

Methods to access the instances which are part of this Entity

InstanceClass get() const

Get the instance corresponding to a scalar entity.

Return

The corresponding instance.

Exceptions

• runtime_error -

  if the entity has been deleted in the underlying AMPL interpreter

• logic_error -

  if the entity is not scalar

InstanceClass get(TupleRef index) const

Get the instance with the specified index.

Return

The corresponding instance

Parameters

• index -

  The tuple specifying the index

Exceptions

• out_of_range -

  if an instance with the specified index does not exist

• runtime_error -

  if the entity has been deleted in the underlying AMPL interpreter

• logic_error -

  if the entity is scalar

InstanceClass get(VariantRef v1) const

InstanceClass get(VariantRef v1, VariantRef v2) const

InstanceClass get(VariantRef v1, VariantRef v2, VariantRef v3) const

InstanceClass get(VariantRef v1, VariantRef v2, VariantRef v3, VariantRef v4) const

Get the instance with the specified index.

Return

The corresponding instance

Parameters

• v1 -

  The VariantRef specifying the first element of the indexing tuple

• v2 -

  The VariantRef specifying the second element of the indexing tuple

• v3 -

  The VariantRef specifying the third element of the indexing tuple

• v4 -

  The VariantRef specifying the fourth element of the indexing tuple

Exceptions

• out_of_range -

  if an instance with the specified index does not exist

• runtime_error -

  if the entity has been deleted in the underlying AMPL interpreter

• logic_error -

  if the entity is scalar

InstanceClass operator[](TupleRef index) const

InstanceClass operator[](VariantRef v1) const

Public Types

typedef SetInstance::MemberList MemberList

Class to access the members of this set (valid only for non-indexed sets)

typedef internal::CountedIterator<internal::EntityWrapper<InstanceClass>> iterator

Iterator for entities, represented by an iterator pointing to elements of type std::pair<TupleRef, InstanceClass>

Public Functions

InstanceList instances() const

Get the InstanceList used to iterate over all the instances in a Set.

std::size_t arity() const

The arity of s, or number of components in each member of this set.

DataFrame getValues() const

Get values of this set in a DataFrame.

Valid only for non indexed sets.

See

SetInstance::getValues()

MemberList members() const

Get members of this Set.

Valid only for non indexed sets.

See

SetInstance::members()

std::size_t size() const

Get the number of tuples in this set.

Valid only for non indexed sets.

bool contains(TupleRef t) const

Check wether this set instance contains the specified Tuple.

Valid only for non indexed sets.

Parameters

• t -

  Tuple to be found

void setValues(internal::Args objects, std::size_t n)

Set values.

Valid only for non indexed sets.

See

SetInstance::setValues()

void setValues(const Tuple objects[], std::size_t n)

Set values.

Valid only for non indexed sets.

See

SetInstance::setValues()

void setValues(DataFrame data)

Set values.

Valid only for non indexed sets.

See

SetInstance::setValues()

iterator begin() const

Get an iterator pointing to the first instance in this entity.

iterator end() const

Get an iterator pointing after the last instance in this entity.

iterator find(TupleRef t) const

Searches the current entity for an instance with the specified index.

Return

an iterator to the wanted entity if found, otherwise an iterator to BasicEntity::end.

class InstanceList

Class used to iterate over all the instances of a Set. For example, supposing an indexed set set A{1..2}; is defined in an AMPL object named ampl:

ampl::Set A = ampl.getSet("A");
for (ampl::SetInstance s: A.instances())
  std::cout << s.name() << "\n";

Public Types

typedef Set::iterator iterator

Iterator over instances of an indexed set.

Public Functions

iterator begin() const

Get an iterator pointing to the first instance in this set.

iterator end() const

Get an iterator pointing after the last instance in this entity.

iterator find(TupleRef t) const

Searches the current entity for an instance with the specified index.

Return

an iterator to the SetInstance if found, otherwise InstanceList::end.