Types¶
-
class
gccjit
::
type
¶ gccjit::type represents a type within the library. It is a subclass of
gccjit::object
.
Types can be created in several ways:
fundamental types can be accessed using
gccjit::context::get_type()
:gccjit::type int_type = ctxt.get_type (GCC_JIT_TYPE_INT);
or using the
gccjit::context::get_int_type
template:gccjit::type t = ctxt.get_int_type <unsigned short> ();
See
gcc_jit_context_get_type()
for the available types.derived types can be accessed by using functions such as
gccjit::type::get_pointer()
andgccjit::type::get_const()
:gccjit::type const_int_star = int_type.get_const ().get_pointer (); gccjit::type int_const_star = int_type.get_pointer ().get_const ();
by creating structures (see below).
Standard types¶
-
gccjit::type
gccjit::context
::
get_type
(enum gcc_jit_types)¶ Access a specific type. This is a thin wrapper around
gcc_jit_context_get_type()
; the parameter has the same meaning.
Pointers, const, and volatile¶
Vector types¶
Structures and unions¶
-
class
gccjit
::
struct_
¶
A compound type analagous to a C struct.
gccjit::struct_
is a subclass of gccjit::type
(and thus
of gccjit::object
in turn).
-
class
gccjit
::
field
¶
A field within a gccjit::struct_
.
gccjit::field
is a subclass of gccjit::object
.
You can model C struct types by creating gccjit::struct_
and
gccjit::field
instances, in either order:
by creating the fields, then the structure. For example, to model:
struct coord {double x; double y; };
you could call:
gccjit::field field_x = ctxt.new_field (double_type, "x"); gccjit::field field_y = ctxt.new_field (double_type, "y"); std::vector fields; fields.push_back (field_x); fields.push_back (field_y); gccjit::struct_ coord = ctxt.new_struct_type ("coord", fields);
by creating the structure, then populating it with fields, typically to allow modelling self-referential structs such as:
struct node { int m_hash; struct node *m_next; };
like this:
gccjit::struct_ node = ctxt.new_opaque_struct_type ("node"); gccjit::type node_ptr = node.get_pointer (); gccjit::field field_hash = ctxt.new_field (int_type, "m_hash"); gccjit::field field_next = ctxt.new_field (node_ptr, "m_next"); std::vector fields; fields.push_back (field_hash); fields.push_back (field_next); node.set_fields (fields);
-
gccjit::field
gccjit::context
::
new_field
(gccjit::type type, const char *name, gccjit::location loc)¶ Construct a new field, with the given type and name.
-
gccjit::struct_
gccjit::context
::
new_struct_type
(const std::string &name, std::vector<field> &fields, gccjit::location loc)¶ Construct a new struct type, with the given name and fields.
-
gccjit::struct_
gccjit::context
::
new_opaque_struct
(const std::string &name, gccjit::location loc)¶ Construct a new struct type, with the given name, but without specifying the fields. The fields can be omitted (in which case the size of the struct is not known), or later specified using
gcc_jit_struct_set_fields()
.