.. Copyright (C) 2014-2015 Free Software Foundation, Inc. Originally contributed by David Malcolm This is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . .. default-domain:: c Types ===== .. c:type:: gcc_jit_type gcc_jit_type represents a type within the library. .. function:: gcc_jit_object *gcc_jit_type_as_object (gcc_jit_type *type) Upcast a type to an object. Types can be created in several ways: * fundamental types can be accessed using :func:`gcc_jit_context_get_type`: .. code-block:: c gcc_jit_type *int_type = gcc_jit_context_get_type (GCC_JIT_TYPE_INT); See :func:`gcc_jit_context_get_type` for the available types. * derived types can be accessed by using functions such as :func:`gcc_jit_type_get_pointer` and :func:`gcc_jit_type_get_const`: .. code-block:: c gcc_jit_type *const_int_star = gcc_jit_type_get_pointer (gcc_jit_type_get_const (int_type)); gcc_jit_type *int_const_star = gcc_jit_type_get_const (gcc_jit_type_get_pointer (int_type)); * by creating structures (see below). Standard types -------------- .. function:: gcc_jit_type *gcc_jit_context_get_type (gcc_jit_context *ctxt, \ enum gcc_jit_types type_) Access a specific type. The available types are: ========================================== ================================ `enum gcc_jit_types` value Meaning ========================================== ================================ :c:data:`GCC_JIT_TYPE_VOID` C's ``void`` type. :c:data:`GCC_JIT_TYPE_VOID_PTR` C's ``void *``. :c:data:`GCC_JIT_TYPE_BOOL` C++'s ``bool`` type; also C99's ``_Bool`` type, aka ``bool`` if using stdbool.h. :c:data:`GCC_JIT_TYPE_CHAR` C's ``char`` (of some signedness) :c:data:`GCC_JIT_TYPE_SIGNED_CHAR` C's ``signed char`` :c:data:`GCC_JIT_TYPE_UNSIGNED_CHAR` C's ``unsigned char`` :c:data:`GCC_JIT_TYPE_SHORT` C's ``short`` (signed) :c:data:`GCC_JIT_TYPE_UNSIGNED_SHORT` C's ``unsigned short`` :c:data:`GCC_JIT_TYPE_INT` C's ``int`` (signed) :c:data:`GCC_JIT_TYPE_UNSIGNED_INT` C's ``unsigned int`` :c:data:`GCC_JIT_TYPE_LONG` C's ``long`` (signed) :c:data:`GCC_JIT_TYPE_UNSIGNED_LONG` C's ``unsigned long`` :c:data:`GCC_JIT_TYPE_LONG_LONG` C99's ``long long`` (signed) :c:data:`GCC_JIT_TYPE_UNSIGNED_LONG_LONG` C99's ``unsigned long long`` :c:data:`GCC_JIT_TYPE_FLOAT` :c:data:`GCC_JIT_TYPE_DOUBLE` :c:data:`GCC_JIT_TYPE_LONG_DOUBLE` :c:data:`GCC_JIT_TYPE_CONST_CHAR_PTR` C type: ``(const char *)`` :c:data:`GCC_JIT_TYPE_SIZE_T` C's ``size_t`` type :c:data:`GCC_JIT_TYPE_FILE_PTR` C type: ``(FILE *)`` :c:data:`GCC_JIT_TYPE_COMPLEX_FLOAT` C99's ``_Complex float`` :c:data:`GCC_JIT_TYPE_COMPLEX_DOUBLE` C99's ``_Complex double`` :c:data:`GCC_JIT_TYPE_COMPLEX_LONG_DOUBLE` C99's ``_Complex long double`` ========================================== ================================ .. function:: gcc_jit_type *\ gcc_jit_context_get_int_type (gcc_jit_context *ctxt, \ int num_bytes, int is_signed) Access the integer type of the given size. Pointers, `const`, and `volatile` --------------------------------- .. function:: gcc_jit_type *gcc_jit_type_get_pointer (gcc_jit_type *type) Given type "T", get type "T*". .. function:: gcc_jit_type *gcc_jit_type_get_const (gcc_jit_type *type) Given type "T", get type "const T". .. function:: gcc_jit_type *gcc_jit_type_get_volatile (gcc_jit_type *type) Given type "T", get type "volatile T". .. function:: gcc_jit_type *\ gcc_jit_context_new_array_type (gcc_jit_context *ctxt, \ gcc_jit_location *loc, \ gcc_jit_type *element_type, \ int num_elements) Given type "T", get type "T[N]" (for a constant N). Structures and unions --------------------- .. c:type:: gcc_jit_struct A compound type analagous to a C `struct`. .. c:type:: gcc_jit_field A field within a :c:type:`gcc_jit_struct`. You can model C `struct` types by creating :c:type:`gcc_jit_struct *` and :c:type:`gcc_jit_field` instances, in either order: * by creating the fields, then the structure. For example, to model: .. code-block:: c struct coord {double x; double y; }; you could call: .. code-block:: c gcc_jit_field *field_x = gcc_jit_context_new_field (ctxt, NULL, double_type, "x"); gcc_jit_field *field_y = gcc_jit_context_new_field (ctxt, NULL, double_type, "y"); gcc_jit_field *fields[2] = {field_x, field_y}; gcc_jit_struct *coord = gcc_jit_context_new_struct_type (ctxt, NULL, "coord", 2, fields); * by creating the structure, then populating it with fields, typically to allow modelling self-referential structs such as: .. code-block:: c struct node { int m_hash; struct node *m_next; }; like this: .. code-block:: c gcc_jit_type *node = gcc_jit_context_new_opaque_struct (ctxt, NULL, "node"); gcc_jit_type *node_ptr = gcc_jit_type_get_pointer (node); gcc_jit_field *field_hash = gcc_jit_context_new_field (ctxt, NULL, int_type, "m_hash"); gcc_jit_field *field_next = gcc_jit_context_new_field (ctxt, NULL, node_ptr, "m_next"); gcc_jit_field *fields[2] = {field_hash, field_next}; gcc_jit_struct_set_fields (node, NULL, 2, fields); .. function:: gcc_jit_field *\ gcc_jit_context_new_field (gcc_jit_context *ctxt,\ gcc_jit_location *loc,\ gcc_jit_type *type,\ const char *name) Construct a new field, with the given type and name. .. function:: gcc_jit_object *\ gcc_jit_field_as_object (gcc_jit_field *field) Upcast from field to object. .. function:: gcc_jit_struct *\ gcc_jit_context_new_struct_type (gcc_jit_context *ctxt,\ gcc_jit_location *loc,\ const char *name,\ int num_fields,\ gcc_jit_field **fields) Construct a new struct type, with the given name and fields. .. function:: gcc_jit_struct *\ gcc_jit_context_new_opaque_struct (gcc_jit_context *ctxt,\ gcc_jit_location *loc,\ const char *name) 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 :c:func:`gcc_jit_struct_set_fields`. .. function:: gcc_jit_type *\ gcc_jit_struct_as_type (gcc_jit_struct *struct_type) Upcast from struct to type. .. function:: void\ gcc_jit_struct_set_fields (gcc_jit_struct *struct_type,\ gcc_jit_location *loc,\ int num_fields,\ gcc_jit_field **fields) Populate the fields of a formerly-opaque struct type. This can only be called once on a given struct type.