1 /* This file contains the definitions and documentation for the
2 additional tree codes used in the GNU C
++ compiler (see tree.def
3 for the standard codes
).
4 Copyright (C
) 1987-2024 Free Software Foundation
, Inc.
5 Hacked by Michael
Tiemann (tiemann@cygnus.com
)
7 This file is part of GCC.
9 GCC is free software
; you can redistribute it and
/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation
; either version
3, or (at your option
)
14 GCC is distributed in the hope that it will be useful
,
15 but WITHOUT ANY WARRANTY
; without even the implied warranty of
16 MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC
; see the file COPYING3. If not see
21 <http
://www.gnu.org
/licenses
/>.
*/
24 /* An OFFSET_REF is used in two situations
:
26 1. An expression of the form `A
::m
' where `A' is a class and `m
' is
27 a non-static member or an overload set. In this case, operand 0
28 will be a TYPE (corresponding to `A') and operand
1 will be a
29 FIELD_DECL
, BASELINK
, or
TEMPLATE_ID_EXPR (corresponding to `m
').
31 The expression is a pointer-to-member if its address is taken (and
32 if, after any overload resolution, 'm
' does not designate a
33 static or explicit object member function). It simply denotes a
34 member of the object if its address is not taken.
36 This form is only used during the parsing phase; once semantic
37 analysis has taken place they are eliminated.
39 2. An expression of the form `x.*p'. In this case
, operand
0 will
40 be an expression corresponding to `x
' and operand 1 will be an
41 expression with pointer-to-member type. */
42 DEFTREECODE (OFFSET_REF, "offset_ref", tcc_reference, 2)
44 /* A pointer-to-member constant. For a pointer-to-member constant
45 `X::Y' The PTRMEM_CST_CLASS is the RECORD_TYPE for `X
' and the
46 PTRMEM_CST_MEMBER is the _DECL for `Y'.
*/
47 DEFTREECODE (PTRMEM_CST
, "ptrmem_cst", tcc_constant
, 0)
49 /* For NEW_EXPR
, operand
0 is the placement list.
50 Operand
1 is the new
-declarator.
51 Operand
2 is the number of elements in the array.
52 Operand
3 is the initializer.
*/
53 DEFTREECODE (NEW_EXPR
, "nw_expr", tcc_expression
, 4)
54 DEFTREECODE (VEC_NEW_EXPR
, "vec_nw_expr", tcc_expression
, 3)
56 /* For DELETE_EXPR
, operand
0 is the store to be destroyed.
57 Operand
1 is the value to pass to the destroying function
58 saying whether the store should be deallocated as well.
*/
59 DEFTREECODE (DELETE_EXPR
, "dl_expr", tcc_expression
, 2)
60 DEFTREECODE (VEC_DELETE_EXPR
, "vec_dl_expr", tcc_expression
, 2)
62 /* Value is reference to particular overloaded class method.
63 Operand
0 is the class
, operand
1 is the field
64 The COMPLEXITY field holds the class
level (usually
0).
*/
65 DEFTREECODE (SCOPE_REF
, "scope_ref", tcc_reference
, 2)
67 /* When composing an object with a member
, this is the result.
68 Operand
0 is the object. Operand
1 is the
member (usually
69 a dereferenced pointer to member
).
*/
70 DEFTREECODE (MEMBER_REF
, "member_ref", tcc_reference
, 2)
72 /* Type conversion operator in C
++. TREE_TYPE is type that this
73 operator converts to. Operand is expression to be converted.
*/
74 DEFTREECODE (TYPE_EXPR
, "type_expr", tcc_expression
, 1)
76 /* AGGR_INIT_EXPRs have a variably
-sized representation similar to
77 that of CALL_EXPRs. Operand
0 is an INTEGER_CST node containing the
78 operand count
, operand
1 is the function which performs initialization
,
79 operand
2 is the slot which was allocated for this expression
, and
80 the remaining operands are the arguments to the initialization function.
*/
81 DEFTREECODE (AGGR_INIT_EXPR
, "aggr_init_expr", tcc_vl_exp
, 3)
83 /* Initialization of an array from another array
, expressed at a high level
84 so that it works with TARGET_EXPR. Operand
0 is the target
, operand
1
85 is the initializer.
*/
86 DEFTREECODE (VEC_INIT_EXPR
, "vec_init_expr", tcc_expression
, 2)
88 /* A throw expression. operand
0 is the expression
, if there was one
,
89 else it is NULL_TREE.
*/
90 DEFTREECODE (THROW_EXPR
, "throw_expr", tcc_expression
, 1)
92 /* An empty class object. The TREE_TYPE gives the class type. We use
93 these to avoid actually creating instances of the empty classes.
*/
94 DEFTREECODE (EMPTY_CLASS_EXPR
, "empty_class_expr", tcc_expression
, 0)
96 /* A reference to a member function or member functions from a base
97 class. BASELINK_FUNCTIONS gives the FUNCTION_DECL
,
98 TEMPLATE_DECL
, OVERLOAD
, or TEMPLATE_ID_EXPR corresponding to the
99 functions. BASELINK_BINFO gives the base from which the functions
100 come
, i.e.
, the base to which the `this
' pointer must be converted
101 before the functions are called. BASELINK_ACCESS_BINFO gives the
102 base used to name the functions.
104 A BASELINK is an expression; the TREE_TYPE of the BASELINK gives
105 the type of the expression. This type is either a FUNCTION_TYPE,
106 METHOD_TYPE, or `unknown_type_node' indicating that the function is
108 DEFTREECODE (BASELINK
, "baselink", tcc_exceptional
, 0)
110 /* Template definition. The following fields have the specified uses
,
111 although there are other macros in cp
-tree.h that should be used for
113 DECL_ARGUMENTS template parm vector
114 DECL_TEMPLATE_INFO template text
&c
115 DECL_VINDEX list of instantiations already produced
;
116 only done for functions so far
118 DECL_INITIAL associated
templates (methods
&c
)
119 DECL_TEMPLATE_RESULT null
120 For non
-class templates
:
121 TREE_TYPE type of object to be constructed
122 DECL_TEMPLATE_RESULT decl for object to be created
123 (e.g.
, FUNCTION_DECL with tmpl parms used
)
125 DEFTREECODE (TEMPLATE_DECL
, "template_decl", tcc_declaration
, 0)
127 /* Index into a template parameter list. The TEMPLATE_PARM_IDX gives
128 the
index (from
0) of the parameter
, while the TEMPLATE_PARM_LEVEL
129 gives the
level (from
1) of the parameter.
133 template <class T> // Index 0, Level 1.
136 template <class U, // Index 0, Level 2.
137 class V> // Index 1, Level 2.
141 The DESCENDANTS will be a chain of TEMPLATE_PARM_INDEXs descended
142 from this one. The first descendant will have the same IDX, but
143 its LEVEL will be one less. The TREE_CHAIN field is used to chain
144 together the descendants. The TEMPLATE_PARM_DECL is the
145 declaration of this parameter, either a TYPE_DECL or CONST_DECL.
146 The TEMPLATE_PARM_ORIG_LEVEL is the LEVEL of the most distant
147 parent, i.e., the LEVEL that the parameter originally had when it
148 was declared. For example, if we instantiate S<int>, we will have:
152 template <class U, // Index 0, Level 1, Orig Level 2
153 class V> // Index 1, Level 1, Orig Level 2
157 The LEVEL is the level of the parameter when we are worrying about
158 the types of things; the ORIG_LEVEL is the level when we are
159 worrying about instantiating things. */
160 DEFTREECODE (TEMPLATE_PARM_INDEX, "template_parm_index", tcc_exceptional, 0)
162 /* Index into a template parameter list for template template parameters.
163 This parameter must be a type. The TYPE_FIELDS value will be a
166 It is used without template arguments like TT in C<TT>,
167 TYPE_NAME is a TEMPLATE_DECL. */
168 DEFTREECODE (TEMPLATE_TEMPLATE_PARM, "template_template_parm", tcc_type, 0)
170 /* The ordering of the following codes is optimized for the checking
171 macros in tree.h. Changing the order will degrade the speed of the
172 compiler. TEMPLATE_TYPE_PARM, TYPENAME_TYPE, TYPEOF_TYPE,
173 BOUND_TEMPLATE_TEMPLATE_PARM. */
175 /* Index into a template parameter list. This parameter must be a type.
176 The type.values field will be a TEMPLATE_PARM_INDEX. */
177 DEFTREECODE (TEMPLATE_TYPE_PARM, "template_type_parm", tcc_type, 0)
179 /* A type designated by `typename T::t'. TYPE_CONTEXT is `T
',
180 TYPE_NAME is an IDENTIFIER_NODE for `t'. If the type was named via
181 template
-id
, TYPENAME_TYPE_FULLNAME will hold the TEMPLATE_ID_EXPR.
182 TREE_TYPE is always NULL.
*/
183 DEFTREECODE (TYPENAME_TYPE
, "typename_type", tcc_type
, 0)
185 /* A type designated by `
__typeof (expr
)'. TYPEOF_TYPE_EXPR is the
186 expression in question. */
187 DEFTREECODE (TYPEOF_TYPE, "typeof_type", tcc_type, 0)
189 /* Like TEMPLATE_TEMPLATE_PARM it is used with bound template arguments
191 In this case, TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO contains the
192 template name and its bound arguments. TYPE_NAME is a TYPE_DECL. */
193 DEFTREECODE (BOUND_TEMPLATE_TEMPLATE_PARM, "bound_template_template_parm",
196 /* For template template argument of the form `T::template C'.
197 TYPE_CONTEXT is `T
', the template parameter dependent object.
198 TYPE_NAME is a TEMPLATE_DECL, whose DECL_TEMPLATE_PARMS are any
199 template parms of the instantiation. That decl's DECL_NAME is the
200 IDENTIFIER_NODE for `C
', the member class template. */
201 DEFTREECODE (UNBOUND_CLASS_TEMPLATE, "unbound_class_template", tcc_type, 0)
203 /* A using declaration. USING_DECL_SCOPE contains the specified
204 scope. In a variadic using-declaration, this is a TYPE_PACK_EXPANSION.
205 In a member using decl, unless DECL_DEPENDENT_P is true,
206 USING_DECL_DECLS contains the _DECL or OVERLOAD so named. This is
207 not an alias, but is later expanded into multiple aliases. */
208 DEFTREECODE (USING_DECL, "using_decl", tcc_declaration, 0)
210 /* A using directive. The operand is USING_STMT_NAMESPACE. */
211 DEFTREECODE (USING_STMT, "using_stmt", tcc_statement, 1)
213 /* An un-parsed operand. Holds a vector of input tokens and
214 a vector of places where the argument was instantiated before
215 parsing had occurred. This is used for default arguments, delayed
216 NSDMIs, and noexcept-specifier parsing. */
217 DEFTREECODE (DEFERRED_PARSE, "deferred_parse", tcc_exceptional, 0)
219 /* An uninstantiated/unevaluated noexcept-specification. For the
220 uninstantiated case, DEFERRED_NOEXCEPT_PATTERN is the pattern from the
221 template, and DEFERRED_NOEXCEPT_ARGS are the template arguments to
222 substitute into the pattern when needed. For the unevaluated case,
223 those slots are NULL_TREE and we use get_defaulted_eh_spec to find
224 the exception-specification. */
225 DEFTREECODE (DEFERRED_NOEXCEPT, "deferred_noexcept", tcc_exceptional, 0)
227 /* A template-id, like foo<int>. The first operand is the template.
228 The second is NULL if there are no explicit arguments, or a
229 TREE_VEC of arguments. The template will be a FUNCTION_DECL,
230 TEMPLATE_DECL, or an OVERLOAD. If the template-id refers to a
231 member template, the template may be an IDENTIFIER_NODE. */
232 DEFTREECODE (TEMPLATE_ID_EXPR, "template_id_expr", tcc_expression, 2)
234 /* One of a set of overloaded functions. */
235 DEFTREECODE (OVERLOAD, "overload", tcc_exceptional, 0)
237 /* A vector of binding slots. */
238 DEFTREECODE (BINDING_VECTOR, "binding_vector", tcc_exceptional, 0)
240 /* A pseudo-destructor, of the form "OBJECT.~DESTRUCTOR" or
241 "OBJECT.SCOPE::~DESTRUCTOR. The first operand is the OBJECT. The
242 second operand (if non-NULL) is the SCOPE. The third operand is
243 the TYPE node corresponding to the DESTRUCTOR. The type of the
244 first operand will always be a scalar type.
246 The type of a PSEUDO_DTOR_EXPR is always "void", even though it can
247 be used as if it were a zero-argument function. We handle the
248 function-call case specially, and giving it "void" type prevents it
249 being used in expressions in ways that are not permitted. */
250 DEFTREECODE (PSEUDO_DTOR_EXPR, "pseudo_dtor_expr", tcc_expression, 3)
252 /* A whole bunch of tree codes for the initial, superficial parsing of
254 DEFTREECODE (MODOP_EXPR, "modop_expr", tcc_expression, 3)
255 DEFTREECODE (CAST_EXPR, "cast_expr", tcc_unary, 1)
256 DEFTREECODE (REINTERPRET_CAST_EXPR, "reinterpret_cast_expr", tcc_unary, 1)
257 DEFTREECODE (CONST_CAST_EXPR, "const_cast_expr", tcc_unary, 1)
258 DEFTREECODE (STATIC_CAST_EXPR, "static_cast_expr", tcc_unary, 1)
259 DEFTREECODE (DYNAMIC_CAST_EXPR, "dynamic_cast_expr", tcc_unary, 1)
260 DEFTREECODE (IMPLICIT_CONV_EXPR, "implicit_conv_expr", tcc_unary, 1)
261 DEFTREECODE (DOTSTAR_EXPR, "dotstar_expr", tcc_expression, 2)
262 DEFTREECODE (TYPEID_EXPR, "typeid_expr", tcc_expression, 1)
263 DEFTREECODE (NOEXCEPT_EXPR, "noexcept_expr", tcc_unary, 1)
264 DEFTREECODE (SPACESHIP_EXPR, "spaceship_expr", tcc_expression, 2)
266 /* CTOR_INITIALIZER is a placeholder in template code for a call to
267 setup_vtbl_pointer (and appears in all functions, not just ctors). */
268 DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer", tcc_expression, 1)
270 DEFTREECODE (TRY_BLOCK, "try_block", tcc_statement, 2)
272 DEFTREECODE (EH_SPEC_BLOCK, "eh_spec_block", tcc_statement, 2)
274 /* A HANDLER wraps a catch handler for the HANDLER_TYPE. If this is
275 CATCH_ALL_TYPE, then the handler catches all types. The declaration of
276 the catch variable is in HANDLER_PARMS, and the body block in
278 DEFTREECODE (HANDLER, "handler", tcc_statement, 2)
280 /* A MUST_NOT_THROW_EXPR wraps an expression that may not
281 throw, and must call terminate if it does. The second argument
282 is a condition, used in templates to express noexcept (condition). */
283 DEFTREECODE (MUST_NOT_THROW_EXPR, "must_not_throw_expr", tcc_expression, 2)
285 /* A CLEANUP_STMT marks the point at which a declaration is fully
286 constructed. The CLEANUP_EXPR is run on behalf of CLEANUP_DECL
287 when CLEANUP_BODY completes. */
288 DEFTREECODE (CLEANUP_STMT, "cleanup_stmt", tcc_statement, 3)
290 /* Represents an 'if
' statement. The operands are IF_COND,
291 THEN_CLAUSE, and ELSE_CLAUSE, and the current scope, respectively. */
292 /* ??? It is currently still necessary to distinguish between IF_STMT
293 and COND_EXPR for the benefit of templates. */
294 DEFTREECODE (IF_STMT, "if_stmt", tcc_statement, 4)
296 /* Used to represent a range-based `for' statement. The operands are
297 RANGE_FOR_DECL
, RANGE_FOR_EXPR
, RANGE_FOR_BODY
, RANGE_FOR_SCOPE
,
298 RANGE_FOR_UNROLL
, and RANGE_FOR_INIT_STMT
, respectively. Only used in
300 DEFTREECODE (RANGE_FOR_STMT
, "range_for_stmt", tcc_statement
, 6)
302 /* Used to represent an expression statement. Use `EXPR_STMT_EXPR
' to
303 obtain the expression. */
304 DEFTREECODE (EXPR_STMT, "expr_stmt", tcc_expression, 1)
306 DEFTREECODE (TAG_DEFN, "tag_defn", tcc_expression, 0)
308 /* Represents an 'offsetof
' expression during template expansion. */
309 DEFTREECODE (OFFSETOF_EXPR, "offsetof_expr", tcc_expression, 2)
311 /* Represents an '__builtin_addressof
' expression during template
312 expansion. This is similar to ADDR_EXPR, but it doesn't invoke
313 overloaded
& operators.
*/
314 DEFTREECODE (ADDRESSOF_EXPR
, "addressof_expr", tcc_expression
, 1)
316 /* Represents the
-> operator during template expansion.
*/
317 DEFTREECODE (ARROW_EXPR
, "arrow_expr", tcc_expression
, 1)
319 /* Represents an
'__alignof__' expression during template
321 DEFTREECODE (ALIGNOF_EXPR
, "alignof_expr", tcc_expression
, 1)
323 /* Represents an Objective
-C
++ '@encode' expression during template
325 DEFTREECODE (AT_ENCODE_EXPR
, "at_encode_expr", tcc_expression
, 1)
327 /* A STMT_EXPR represents a statement
-expression during template
328 expansion. This is the GCC extension
{ ( ...
) }. The
329 STMT_EXPR_STMT is the statement given by the expression.
*/
330 DEFTREECODE (STMT_EXPR
, "stmt_expr", tcc_expression
, 1)
332 /* Unary plus. Operand
0 is the expression to which the unary plus
334 DEFTREECODE (UNARY_PLUS_EXPR
, "unary_plus_expr", tcc_unary
, 1)
336 /** C
++11 extensions.
*/
338 /* A static assertion. This is a C
++11 extension.
339 STATIC_ASSERT_CONDITION contains the condition that is being
340 checked. STATIC_ASSERT_MESSAGE contains the
message (a string
341 literal
) to be displayed if the condition fails to hold.
*/
342 DEFTREECODE (STATIC_ASSERT
, "static_assert", tcc_exceptional
, 0)
344 /* Represents an argument pack of
types (or templates
). An argument
345 pack stores zero or more arguments that will be used to instantiate
348 ARGUMENT_PACK_ARGS retrieves the arguments stored in the argument
352 template
<typename... Values
>
355 tuple
<int
, float
, double
> t
;
357 Values is
a (template
) parameter pack. When tuple
<int
, float
,
358 double
> is instantiated
, the Values parameter pack is instantiated
359 with the argument pack
<int
, float
, double
>. ARGUMENT_PACK_ARGS will
360 be a TREE_VEC containing int
, float
, and double.
*/
361 DEFTREECODE (TYPE_ARGUMENT_PACK
, "type_argument_pack", tcc_type
, 0)
363 /* Represents an argument pack of values
, which can be used either for
364 non
-type template arguments or function call arguments.
366 NONTYPE_ARGUMENT_PACK plays precisely the same role as
367 TYPE_ARGUMENT_PACK
, but will be used for packing non
-type template
368 arguments (e.g.
, "int... Dimensions") or function
arguments ("const
370 DEFTREECODE (NONTYPE_ARGUMENT_PACK
, "nontype_argument_pack", tcc_expression
, 1)
372 /* Represents a type expression that will be expanded into a list of
373 types when instantiated with one or more argument packs.
375 PACK_EXPANSION_PATTERN retrieves the expansion pattern. This is
376 the type or expression that we will substitute into with each
377 argument in an argument pack.
379 PACK_EXPANSION_PARAMETER_PACKS contains a TREE_LIST of the parameter
380 packs that are used in this pack expansion.
383 template
<typename... Values
>
384 struct tied
: tuple
<Values
&...
> {
388 The derivation from tuple contains a TYPE_PACK_EXPANSION for the
389 template arguments. Its PACK_EXPANSION_PATTERN is
"Values&" and its
390 PACK_EXPANSION_PARAMETER_PACKS will contain
"Values".
*/
391 DEFTREECODE (TYPE_PACK_EXPANSION
, "type_pack_expansion", tcc_type
, 0)
393 /* Represents an expression that will be expanded into a list of
394 expressions when instantiated with one or more argument packs.
396 EXPR_PACK_EXPANSION plays precisely the same role as TYPE_PACK_EXPANSION
,
397 but will be used for expressions.
*/
398 DEFTREECODE (EXPR_PACK_EXPANSION
, "expr_pack_expansion", tcc_expression
, 3)
400 /* Selects the Ith parameter out of an argument pack. This node will
401 be used when instantiating pack expansions
; see
402 tsubst_pack_expansion.
404 ARGUMENT_PACK_SELECT_FROM_PACK contains the
*_ARGUMENT_PACK node
405 from which the argument will be selected.
407 ARGUMENT_PACK_SELECT_INDEX contains the index into the argument
408 pack that will be returned by this ARGUMENT_PACK_SELECT node. The
409 index is a machine integer.
*/
410 DEFTREECODE (ARGUMENT_PACK_SELECT
, "argument_pack_select", tcc_exceptional
, 0)
412 /* Fold expressions allow the expansion of a template argument pack
413 over a binary operator.
415 FOLD_EXPR_MOD_P is true when the fold operation is a compound assignment
418 FOLD_EXPR_OP is an INTEGER_CST storing the tree code for the folded
419 expression. Note that when FOLDEXPR_MOD_P is true
, the operator is
420 a compound assignment operator for that kind of expression.
422 FOLD_EXPR_PACK is an expression containing an unexpanded parameter pack
;
423 when expanded
, each term becomes an argument of the folded expression.
425 In a BINARY_FOLD_EXPRESSION
, FOLD_EXPR_INIT is the non
-pack argument.
*/
426 DEFTREECODE (UNARY_LEFT_FOLD_EXPR
, "unary_left_fold_expr", tcc_expression
, 2)
427 DEFTREECODE (UNARY_RIGHT_FOLD_EXPR
, "unary_right_fold_expr", tcc_expression
, 2)
428 DEFTREECODE (BINARY_LEFT_FOLD_EXPR
, "binary_left_fold_expr", tcc_expression
, 3)
429 DEFTREECODE (BINARY_RIGHT_FOLD_EXPR
, "binary_right_fold_expr", tcc_expression
, 3)
431 /* Represents the
__builtin_bit_cast (type
, expr
) expression.
432 The type is in TREE_TYPE
, expression in
TREE_OPERAND (bitcast
, 0).
*/
433 DEFTREECODE (BIT_CAST_EXPR
, "bit_cast_expr", tcc_expression
, 1)
435 /** C
++ extensions.
*/
437 /* Represents a templated trait that yields an expression.
*/
438 DEFTREECODE (TRAIT_EXPR
, "trait_expr", tcc_exceptional
, 0)
440 /* Represents a templated trait that yields a type.
*/
441 DEFTREECODE (TRAIT_TYPE
, "trait_type", tcc_type
, 0)
443 /* A lambda expression. This is a C
++0x extension.
444 LAMBDA_EXPR_DEFAULT_CAPTURE_MODE is an enum for the default
, which may be
446 LAMBDA_EXPR_CAPTURE_LIST holds the capture
-list
, including `this
'.
447 LAMBDA_EXPR_THIS_CAPTURE goes straight to the capture of `this', if it exists.
448 LAMBDA_EXPR_PENDING_PROXIES is a vector of capture proxies which need to
449 be pushed once scope returns to the lambda.
*/
450 DEFTREECODE (LAMBDA_EXPR
, "lambda_expr", tcc_exceptional
, 0)
452 /* The declared type of an expression. This is a C
++0x extension.
453 DECLTYPE_TYPE_EXPR is the expression whose type we are computing.
454 DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P states whether the
455 expression was parsed as an id
-expression or a member access
456 expression. When false
, it was parsed as a full expression.
457 DECLTYPE_FOR_LAMBDA_CAPTURE is set if we want lambda capture semantics.
458 DECLTYPE_FOR_LAMBDA_RETURN is set if we want lambda return deduction.
*/
459 DEFTREECODE (DECLTYPE_TYPE
, "decltype_type", tcc_type
, 0)
461 /* A type designated by one of the bases type traits.
462 BASES_TYPE is the type in question.
*/
463 DEFTREECODE (BASES
, "bases", tcc_type
, 0)
465 /* Dependent operator expressions are given this type rather than a NULL_TREE
466 type so that we have somewhere to stash the result of phase
1 name lookup
467 (namely into DEPENDENT_OPERATOR_TYPE_SAVED_LOOKUPS
).
*/
468 DEFTREECODE (DEPENDENT_OPERATOR_TYPE
, "dependent_operator_type", tcc_type
, 0)
470 /* Used to represent the template information stored by template
473 TI_TEMPLATE the template declaration associated to the specialization
474 TI_ARGS the arguments of the template specialization
475 TI_TYPEDEFS_NEEDING_ACCESS_CHECKING the vector of typedefs used in
476 the pattern of the template for which access check is needed at template
477 instantiation time.
*/
478 DEFTREECODE (TEMPLATE_INFO
, "template_info", tcc_exceptional
, 0)
480 /* OpenMP
- #pragma omp depobj
481 Operand
0: OMP_DEPOBJ_DEPOBJ
: Depobj expression
482 Operand
1: OMP_DEPOBJ_CLAUSES
: List of clauses.
*/
483 DEFTREECODE (OMP_DEPOBJ
, "omp_depobj", tcc_statement
, 2)
485 /* Extensions for Concepts.
*/
487 /* Used to represent information associated with constrained declarations.
*/
488 DEFTREECODE (CONSTRAINT_INFO
, "constraint_info", tcc_exceptional
, 0)
490 /* A wildcard declaration is a placeholder for a template parameter
491 used to resolve constrained
-type
-names in concepts. During
492 resolution
, the matching argument is saved as the TREE_TYPE
494 DEFTREECODE (WILDCARD_DECL
, "wildcard_decl", tcc_declaration
, 0)
496 /* A requires
-expr has three operands. The first operand is
497 its parameter
list (possibly NULL
). The second is a list of
498 requirements
, which are denoted by the _REQ
* tree codes
499 below. The third is a TREE_VEC of template arguments to
500 be applied when substituting into the parameter list and
501 requirements
, set by tsubst_requires_expr for partial instantiations.
*/
502 DEFTREECODE (REQUIRES_EXPR
, "requires_expr", tcc_expression
, 3)
504 /* A requirement for an expression.
*/
505 DEFTREECODE (SIMPLE_REQ
, "simple_req", tcc_expression
, 1)
507 /* A requirement for a type.
*/
508 DEFTREECODE (TYPE_REQ
, "type_req", tcc_expression
, 1)
510 /* A requirement for an expression and its properties. The
511 first operand is the expression
, and the
2nd is its type.
512 The accessor COMPOUND_REQ_NOEXCEPT determines whether
513 the noexcept keyword was present.
*/
514 DEFTREECODE (COMPOUND_REQ
, "compound_req", tcc_expression
, 2)
516 /* A requires clause within a requires expression.
*/
517 DEFTREECODE (NESTED_REQ
, "nested_req", tcc_expression
, 1)
519 /* Constraints are modeled as kinds of expressions.
520 The operands of a constraint can be either types or expressions.
521 Unlike expressions
, constraints do not have a type.
*/
523 /* An atomic constraint evaluates an expression E. The operand of the
524 constraint is its parameter mapping. The actual expression is stored
527 ATOMIC_CONSTR_INFO provides source info to support diagnostics.
528 ATOMIC_CONSTR_EXPR has the expression to be evaluated.
529 ATOMIC_CONSTR_PARMS is the parameter mapping for the atomic constraint
530 and is stored in the type field.
*/
531 DEFTREECODE (ATOMIC_CONSTR
, "atomic_constr", tcc_expression
, 1)
533 /* The conjunction and disjunction of two constraints
, respectively.
534 Operands are accessed using TREE_OPERAND. The third operand provides
535 source info for diagnostics.
537 CONJ_CONSTR_INFO and DISJ_CONSTR_INFO provide access to the source
538 information of constraints
, which is stored in the TREE_TYPE.
*/
539 DEFTREECODE (CONJ_CONSTR
, "conj_constr", tcc_expression
, 2)
540 DEFTREECODE (DISJ_CONSTR
, "disj_constr", tcc_expression
, 2)
542 /* A check constraint represents the checking of a concept
543 C. It has two operands
: the template defining the concept
544 and a sequence of template arguments.
546 CHECK_CONSTR_CONCEPT has the concept definition
547 CHECK_CONSTR_ARGUMENTS are the template arguments
*/
548 DEFTREECODE (CHECK_CONSTR
, "check_constr", tcc_expression
, 2)
550 /* The co_await expression is used to support coroutines.
552 Op
0 is the cast
expresssion (potentially modified by the
553 promise
"await_transform()" method
).
554 Op1 is a proxy for the temp
/ coro frame slot
'e' value.
555 Op2 is the initialiser for
Op1 (Op0
, potentially modified by any
556 applicable
'co_await' operator
).
557 Op3 is a vector of the
[0] e.ready
, [1] e.suspend and
[2] e.resume calls.
558 Op4 is a mode
: 0 (await
) 1 (yield
) 2 (initial
) 3 (final
) */
559 DEFTREECODE (CO_AWAIT_EXPR
, "co_await", tcc_expression
, 5)
561 /* The co_yield expression is used to support coroutines.
563 Op0 is the original
expr (for use in diagnostics
)
564 Op2 is the co_await derived from this.
*/
565 DEFTREECODE (CO_YIELD_EXPR
, "co_yield", tcc_expression
, 2)
567 /* The co_return expression is used to support coroutines.
569 Op0 is the original expr
, can be
void (for use in diagnostics
)
570 Op1 is the promise return_xxxx call for for the expression given.
*/
572 DEFTREECODE (CO_RETURN_EXPR
, "co_return", tcc_statement
, 2)
574 /* Different flavors of contracts.
576 Assertions and preconditions have two operands
: a node containing
577 the their mode and condition. Postconditions have an additional
578 operand to store the optional name for the result value.
580 CONTRACT_SEMANTIC has the computed behavior of the contract.
*/
581 DEFTREECODE (ASSERTION_STMT
, "assertion_stmt", tcc_statement
, 3)
582 DEFTREECODE (PRECONDITION_STMT
, "precondition_stmt", tcc_statement
, 3)
583 DEFTREECODE (POSTCONDITION_STMT
, "postcondition_stmt", tcc_statement
, 4)