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3.2.3.4 Structures and unions ¶

C++ 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).

C++ 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);
  

C++ Function: 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.

C++ Function: 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.

C++ Function: 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().