The union type. More...

#include <c_types.h>

Inheritance diagram for union_typet:

Collaboration diagram for union_typet:

Public Member Functions
	union_typet ()

	union_typet (componentst _components)

std::optional< std::pair< struct_union_typet::componentt, mp_integer > >	find_widest_union_component (const namespacet &ns) const
	Determine the member of maximum bit width in a union type. More...

Public Member Functions inherited from struct_union_typet
	struct_union_typet (const irep_idt &_id)

	struct_union_typet (const irep_idt &_id, componentst _components)

const componentst &	components () const

componentst &	components ()

bool	has_component (const irep_idt &component_name) const

const componentt &	get_component (const irep_idt &component_name) const
	Get the reference to a component with given name. More...

std::size_t	component_number (const irep_idt &component_name) const
	Return the sequence number of the component with given name. More...

const typet &	component_type (const irep_idt &component_name) const

irep_idt	get_tag () const

void	set_tag (const irep_idt &tag)

bool	is_class () const
	A struct may be a class, where members may have access restrictions. More...

irep_idt	default_access () const
	Return the access specification for members where access has not been modified. More...

bool	is_incomplete () const
	A struct/union may be incomplete. More...

void	make_incomplete ()
	A struct/union may be incomplete. More...

Public Member Functions inherited from typet
	typet ()

	typet (const irep_idt &_id)

	typet (irep_idt _id, typet _subtype)

typet &	add_subtype ()

bool	has_subtypes () const

bool	has_subtype () const

void	remove_subtype ()

const source_locationt &	source_location () const

source_locationt &	add_source_location ()

typet &&	with_source_location (source_locationt location) &&
	This is a 'fluent style' method for creating a new type with an added-on source location. More...

typet &	with_source_location (source_locationt location) &
	This is a 'fluent style' method for adding a source location. More...

typet &&	with_source_location (const typet &type) &&
	This is a 'fluent style' method for creating a new type with an added-on source location. More...

typet &	with_source_location (const typet &type) &
	This is a 'fluent style' method for adding a source location. More...

typet &	add_type (const irep_idt &name)

const typet &	find_type (const irep_idt &name) const

Public Member Functions inherited from irept
bool	is_nil () const

bool	is_not_nil () const

	irept (const irep_idt &_id)

	irept (const irep_idt &_id, const named_subt &_named_sub, const subt &_sub)

	irept ()=default

const irep_idt &	id () const

const std::string &	id_string () const

void	id (const irep_idt &_data)

const irept &	find (const irep_idt &name) const

irept &	add (const irep_idt &name)

irept &	add (const irep_idt &name, irept irep)

const std::string &	get_string (const irep_idt &name) const

const irep_idt &	get (const irep_idt &name) const

bool	get_bool (const irep_idt &name) const

signed int	get_int (const irep_idt &name) const

std::size_t	get_size_t (const irep_idt &name) const

long long	get_long_long (const irep_idt &name) const

void	set (const irep_idt &name, const irep_idt &value)

void	set (const irep_idt &name, irept irep)

void	set (const irep_idt &name, const long long value)

void	set_size_t (const irep_idt &name, const std::size_t value)

void	remove (const irep_idt &name)

void	move_to_sub (irept &irep)

void	move_to_named_sub (const irep_idt &name, irept &irep)

bool	operator== (const irept &other) const

bool	operator!= (const irept &other) const

void	swap (irept &irep)

bool	operator< (const irept &other) const
	defines ordering on the internal representation More...

bool	ordering (const irept &other) const
	defines ordering on the internal representation More...

int	compare (const irept &i) const
	defines ordering on the internal representation comments are ignored More...

void	clear ()

void	make_nil ()

subt &	get_sub ()

const subt &	get_sub () const

named_subt &	get_named_sub ()

const named_subt &	get_named_sub () const

std::size_t	hash () const

std::size_t	full_hash () const

bool	full_eq (const irept &other) const

std::string	pretty (unsigned indent=0, unsigned max_indent=0) const

Public Member Functions inherited from sharing_treet< irept, forward_list_as_mapt< irep_idt, irept > >
	sharing_treet (irep_idt _id)

	sharing_treet (irep_idt _id, named_subt _named_sub, subt _sub)

	sharing_treet ()

	sharing_treet (const sharing_treet &irep)

	sharing_treet (sharing_treet &&irep)

sharing_treet &	operator= (const sharing_treet &irep)

sharing_treet &	operator= (sharing_treet &&irep)

	~sharing_treet ()

const dt &	read () const

dt &	write ()

Additional Inherited Members
Public Types inherited from struct_union_typet
typedef std::vector< componentt >	componentst

Public Types inherited from irept
using	baset = tree_implementationt

Public Types inherited from sharing_treet< irept, forward_list_as_mapt< irep_idt, irept > >
using	dt = tree_nodet< irept, forward_list_as_mapt< irep_idt, irept >, true >

using	subt = typename dt::subt

using	named_subt = typename dt::named_subt

using	tree_implementationt = sharing_treet
	Used to refer to this class from derived classes. More...

Static Public Member Functions inherited from typet
static void	check (const typet &, const validation_modet=validation_modet::INVARIANT)
	Check that the type is well-formed (shallow checks only, i.e., subtypes are not checked) More...

static void	validate (const typet &type, const namespacet &, const validation_modet vm=validation_modet::INVARIANT)
	Check that the type is well-formed, assuming that its subtypes have already been checked for well-formedness. More...

static void	validate_full (const typet &type, const namespacet &ns, const validation_modet vm=validation_modet::INVARIANT)
	Check that the type is well-formed (full check, including checks of subtypes) More...

Static Public Member Functions inherited from irept
static bool	is_comment (const irep_idt &name)

static std::size_t	number_of_non_comments (const named_subt &)
	count the number of named_sub elements that are not comments More...

Protected Member Functions inherited from sharing_treet< irept, forward_list_as_mapt< irep_idt, irept > >
void	detach ()

Static Protected Member Functions inherited from sharing_treet< irept, forward_list_as_mapt< irep_idt, irept > >
static void	remove_ref (dt *old_data)

static void	nonrecursive_destructor (dt *old_data)
	Does the same as remove_ref, but using an explicit stack instead of recursion. More...

Protected Attributes inherited from sharing_treet< irept, forward_list_as_mapt< irep_idt, irept > >
dt *	data

Static Protected Attributes inherited from sharing_treet< irept, forward_list_as_mapt< irep_idt, irept > >
static dt	empty_d

Detailed Description

The union type.

For example, C union.

Definition at line 146 of file c_types.h.

Constructor & Destructor Documentation

◆ union_typet() [1/2]

union_typet::union_typet ( )

inline

Definition at line 149 of file c_types.h.

◆ union_typet() [2/2]

union_typet::union_typet ( componentst _components )

inlineexplicit

Definition at line 153 of file c_types.h.

Member Function Documentation

◆ find_widest_union_component()

std::optional< std::pair< struct_union_typet::componentt, mp_integer > > union_typet::find_widest_union_component ( const namespacet & ns ) const

Determine the member of maximum bit width in a union type.

If no member, or a member of non-fixed width can be found, return nullopt.

Parameters

ns	Namespace to resolve tag types.

Returns: Pair of a componentt pointing to the maximum fixed bit-width member of the union type and the bit width of that member.

Definition at line 300 of file c_types.cpp.

The documentation for this class was generated from the following files:

/home/runner/work/cbmc/cbmc/src/util/c_types.h
/home/runner/work/cbmc/cbmc/src/util/c_types.cpp