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union_typet Class Reference

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.
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 componentstcomponents () const
componentstcomponents ()
bool has_component (const irep_idt &component_name) const
const componenttget_component (const irep_idt &component_name) const
 Get the reference to a component with given name.
std::size_t component_number (const irep_idt &component_name) const
 Return the sequence number of the component with given name.
const typetcomponent_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.
irep_idt default_access () const
 Return the access specification for members where access has not been modified.
bool is_incomplete () const
 A struct/union may be incomplete.
void make_incomplete ()
 A struct/union may be incomplete.
Public Member Functions inherited from typet
 typet ()
 typet (const irep_idt &_id)
 typet (irep_idt _id, typet _subtype)
typetadd_subtype ()
bool has_subtypes () const
bool has_subtype () const
void remove_subtype ()
const source_locationtsource_location () const
source_locationtadd_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.
typetwith_source_location (source_locationt location) &
 This is a 'fluent style' method for adding a source location.
typet && with_source_location (const typet &type) &&
 This is a 'fluent style' method for creating a new type with an added-on source location.
typetwith_source_location (const typet &type) &
 This is a 'fluent style' method for adding a source location.
typetadd_type (const irep_idt &name)
const typetfind_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_idtid () const
const std::string & id_string () const
void id (const irep_idt &_data)
const ireptfind (const irep_idt &name) const
ireptadd (const irep_idt &name)
ireptadd (const irep_idt &name, irept irep)
const std::string & get_string (const irep_idt &name) const
const irep_idtget (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
bool ordering (const irept &other) const
 defines ordering on the internal representation
int compare (const irept &i) const
 defines ordering on the internal representation comments are ignored
void clear ()
void make_nil ()
subtget_sub ()
const subtget_sub () const
named_subtget_named_sub ()
const named_subtget_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_treetoperator= (const sharing_treet &irep)
 ~sharing_treet ()
const dtread () const
dtwrite ()

Additional Inherited Members

Public Types inherited from struct_union_typet
typedef std::vector< componenttcomponentst
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
using subt
using named_subt
using tree_implementationt
 Used to refer to this class from derived classes.
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)
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.
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)
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
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.
Protected Attributes inherited from sharing_treet< irept, forward_list_as_mapt< irep_idt, irept > >
dtdata
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
nsNamespace 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: