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
) 1987-2014 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. In this case, operand 0 will be a TYPE
28 (corresponding to `A') and operand
1 will be a FIELD_DECL
,
29 BASELINK
, or
TEMPLATE_ID_EXPR (corresponding to `m
').
31 The expression is a pointer-to-member if its address is taken,
32 but simply denotes a member of the object if its address is not
35 This form is only used during the parsing phase; once semantic
36 analysis has taken place they are eliminated.
38 2. An expression of the form `x.*p'. In this case
, operand
0 will
39 be an expression corresponding to `x
' and operand 1 will be an
40 expression with pointer-to-member type. */
41 DEFTREECODE (OFFSET_REF, "offset_ref", tcc_reference, 2)
43 /* A pointer-to-member constant. For a pointer-to-member constant
44 `X::Y' The PTRMEM_CST_CLASS is the RECORD_TYPE for `X
' and the
45 PTRMEM_CST_MEMBER is the _DECL for `Y'.
*/
46 DEFTREECODE (PTRMEM_CST
, "ptrmem_cst", tcc_constant
, 0)
48 /* For NEW_EXPR
, operand
0 is the placement list.
49 Operand
1 is the new
-declarator.
50 Operand
2 is the number of elements in the array.
51 Operand
3 is the initializer.
*/
52 DEFTREECODE (NEW_EXPR
, "nw_expr", tcc_expression
, 4)
53 DEFTREECODE (VEC_NEW_EXPR
, "vec_nw_expr", tcc_expression
, 3)
55 /* For DELETE_EXPR
, operand
0 is the store to be destroyed.
56 Operand
1 is the value to pass to the destroying function
57 saying whether the store should be deallocated as well.
*/
58 DEFTREECODE (DELETE_EXPR
, "dl_expr", tcc_expression
, 2)
59 DEFTREECODE (VEC_DELETE_EXPR
, "vec_dl_expr", tcc_expression
, 2)
61 /* Value is reference to particular overloaded class method.
62 Operand
0 is the class
, operand
1 is the field
63 The COMPLEXITY field holds the class
level (usually
0).
*/
64 DEFTREECODE (SCOPE_REF
, "scope_ref", tcc_reference
, 2)
66 /* When composing an object with a member
, this is the result.
67 Operand
0 is the object. Operand
1 is the
member (usually
68 a dereferenced pointer to member
).
*/
69 DEFTREECODE (MEMBER_REF
, "member_ref", tcc_reference
, 2)
71 /* Type conversion operator in C
++. TREE_TYPE is type that this
72 operator converts to. Operand is expression to be converted.
*/
73 DEFTREECODE (TYPE_EXPR
, "type_expr", tcc_expression
, 1)
75 /* AGGR_INIT_EXPRs have a variably
-sized representation similar to
76 that of CALL_EXPRs. Operand
0 is an INTEGER_CST node containing the
77 operand count
, operand
1 is the function which performs initialization
,
78 operand
2 is the slot which was allocated for this expression
, and
79 the remaining operands are the arguments to the initialization function.
*/
80 DEFTREECODE (AGGR_INIT_EXPR
, "aggr_init_expr", tcc_vl_exp
, 3)
82 /* Initialization of an array from another array
, expressed at a high level
83 so that it works with TARGET_EXPR. Operand
0 is the target
, operand
1
84 is the initializer.
*/
85 DEFTREECODE (VEC_INIT_EXPR
, "vec_init_expr", tcc_expression
, 2)
87 /* A throw expression. operand
0 is the expression
, if there was one
,
88 else it is NULL_TREE.
*/
89 DEFTREECODE (THROW_EXPR
, "throw_expr", tcc_expression
, 1)
91 /* An empty class object. The TREE_TYPE gives the class type. We use
92 these to avoid actually creating instances of the empty classes.
*/
93 DEFTREECODE (EMPTY_CLASS_EXPR
, "empty_class_expr", tcc_expression
, 0)
95 /* A reference to a member function or member functions from a base
96 class. BASELINK_FUNCTIONS gives the FUNCTION_DECL
,
97 TEMPLATE_DECL
, OVERLOAD
, or TEMPLATE_ID_EXPR corresponding to the
98 functions. BASELINK_BINFO gives the base from which the functions
99 come
, i.e.
, the base to which the `this
' pointer must be converted
100 before the functions are called. BASELINK_ACCESS_BINFO gives the
101 base used to name the functions.
103 A BASELINK is an expression; the TREE_TYPE of the BASELINK gives
104 the type of the expression. This type is either a FUNCTION_TYPE,
105 METHOD_TYPE, or `unknown_type_node' indicating that the function is
107 DEFTREECODE (BASELINK
, "baselink", tcc_exceptional
, 0)
109 /* Template definition. The following fields have the specified uses
,
110 although there are other macros in cp
-tree.h that should be used for
112 DECL_ARGUMENTS template parm vector
113 DECL_TEMPLATE_INFO template text
&c
114 DECL_VINDEX list of instantiations already produced
;
115 only done for functions so far
117 DECL_INITIAL associated
templates (methods
&c
)
118 DECL_TEMPLATE_RESULT null
119 For non
-class templates
:
120 TREE_TYPE type of object to be constructed
121 DECL_TEMPLATE_RESULT decl for object to be created
122 (e.g.
, FUNCTION_DECL with tmpl parms used
)
124 DEFTREECODE (TEMPLATE_DECL
, "template_decl", tcc_declaration
, 0)
126 /* Index into a template parameter list. The TEMPLATE_PARM_IDX gives
127 the
index (from
0) of the parameter
, while the TEMPLATE_PARM_LEVEL
128 gives the
level (from
1) of the parameter.
132 template <class T> // Index 0, Level 1.
135 template <class U, // Index 0, Level 2.
136 class V> // Index 1, Level 2.
140 The DESCENDANTS will be a chain of TEMPLATE_PARM_INDEXs descended
141 from this one. The first descendant will have the same IDX, but
142 its LEVEL will be one less. The TREE_CHAIN field is used to chain
143 together the descendants. The TEMPLATE_PARM_DECL is the
144 declaration of this parameter, either a TYPE_DECL or CONST_DECL.
145 The TEMPLATE_PARM_ORIG_LEVEL is the LEVEL of the most distant
146 parent, i.e., the LEVEL that the parameter originally had when it
147 was declared. For example, if we instantiate S<int>, we will have:
151 template <class U, // Index 0, Level 1, Orig Level 2
152 class V> // Index 1, Level 1, Orig Level 2
156 The LEVEL is the level of the parameter when we are worrying about
157 the types of things; the ORIG_LEVEL is the level when we are
158 worrying about instantiating things. */
159 DEFTREECODE (TEMPLATE_PARM_INDEX, "template_parm_index", tcc_exceptional, 0)
161 /* Index into a template parameter list for template template parameters.
162 This parameter must be a type. The TYPE_FIELDS value will be a
165 It is used without template arguments like TT in C<TT>,
166 TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO is NULL_TREE
167 and 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 an IDENTIFIER_NODE for `C', the member class template.
*/
199 DEFTREECODE (UNBOUND_CLASS_TEMPLATE
, "unbound_class_template", tcc_type
, 0)
201 /* A using declaration. USING_DECL_SCOPE contains the specified
202 scope. In a member using decl
, unless DECL_DEPENDENT_P is true
,
203 USING_DECL_DECLS contains the _DECL or OVERLOAD so named. This is
204 not an alias
, but is later expanded into multiple aliases.
*/
205 DEFTREECODE (USING_DECL
, "using_decl", tcc_declaration
, 0)
207 /* A using directive. The operand is USING_STMT_NAMESPACE.
*/
208 DEFTREECODE (USING_STMT
, "using_stmt", tcc_statement
, 1)
210 /* An un
-parsed default argument. Holds a vector of input tokens and
211 a vector of places where the argument was instantiated before
212 parsing had occurred.
*/
213 DEFTREECODE (DEFAULT_ARG
, "default_arg", tcc_exceptional
, 0)
215 /* An uninstantiated noexcept
-specification. DEFERRED_NOEXCEPT_PATTERN is
216 the pattern from the template
, and DEFERRED_NOEXCEPT_ARGS are the
217 template arguments to substitute into the pattern when needed.
*/
218 DEFTREECODE (DEFERRED_NOEXCEPT
, "deferred_noexcept", tcc_exceptional
, 0)
220 /* A template
-id
, like foo
<int
>. The first operand is the template.
221 The second is NULL if there are no explicit arguments
, or a
222 TREE_VEC of arguments. The template will be a FUNCTION_DECL
,
223 TEMPLATE_DECL
, or an OVERLOAD. If the template
-id refers to a
224 member template
, the template may be an IDENTIFIER_NODE.
*/
225 DEFTREECODE (TEMPLATE_ID_EXPR
, "template_id_expr", tcc_expression
, 2)
227 /* A list
-like node for chaining overloading candidates. TREE_TYPE is
228 the original name
, and the parameter is the FUNCTION_DECL.
*/
229 DEFTREECODE (OVERLOAD
, "overload", tcc_exceptional
, 0)
231 /* A pseudo
-destructor
, of the form
"OBJECT.~DESTRUCTOR" or
232 "OBJECT.SCOPE::~DESTRUCTOR. The first operand is the OBJECT. The
233 second operand (if non-NULL) is the SCOPE. The third operand is
234 the TYPE node corresponding to the DESTRUCTOR. The type of the
235 first operand will always be a scalar type.
237 The type of a PSEUDO_DTOR_EXPR is always "void
", even though it can
238 be used as if it were a zero-argument function. We handle the
239 function-call case specially, and giving it "void
" type prevents it
240 being used in expressions in ways that are not permitted. */
241 DEFTREECODE (PSEUDO_DTOR_EXPR, "pseudo_dtor_expr
", tcc_expression, 3)
243 /* A whole bunch of tree codes for the initial, superficial parsing of
245 DEFTREECODE (MODOP_EXPR, "modop_expr
", tcc_expression, 3)
246 DEFTREECODE (CAST_EXPR, "cast_expr
", tcc_unary, 1)
247 DEFTREECODE (REINTERPRET_CAST_EXPR, "reinterpret_cast_expr
", tcc_unary, 1)
248 DEFTREECODE (CONST_CAST_EXPR, "const_cast_expr
", tcc_unary, 1)
249 DEFTREECODE (STATIC_CAST_EXPR, "static_cast_expr
", tcc_unary, 1)
250 DEFTREECODE (DYNAMIC_CAST_EXPR, "dynamic_cast_expr
", tcc_unary, 1)
251 DEFTREECODE (IMPLICIT_CONV_EXPR, "implicit_conv_expr
", tcc_unary, 1)
252 DEFTREECODE (DOTSTAR_EXPR, "dotstar_expr
", tcc_expression, 2)
253 DEFTREECODE (TYPEID_EXPR, "typeid_expr
", tcc_expression, 1)
254 DEFTREECODE (NOEXCEPT_EXPR, "noexcept_expr
", tcc_unary, 1)
256 /* A placeholder for an expression that is not type-dependent, but
257 does occur in a template. When an expression that is not
258 type-dependent appears in a larger expression, we must compute the
259 type of that larger expression. That computation would normally
260 modify the original expression, which would change the mangling of
261 that expression if it appeared in a template argument list. In
262 that situation, we create a NON_DEPENDENT_EXPR to take the place of
263 the original expression. The expression is the only operand -- it
264 is only needed for diagnostics. */
265 DEFTREECODE (NON_DEPENDENT_EXPR, "non_dependent_expr
", tcc_expression, 1)
267 /* CTOR_INITIALIZER is a placeholder in template code for a call to
268 setup_vtbl_pointer (and appears in all functions, not just ctors). */
269 DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer
", tcc_expression, 1)
271 DEFTREECODE (TRY_BLOCK, "try_block
", tcc_statement, 2)
273 DEFTREECODE (EH_SPEC_BLOCK, "eh_spec_block
", tcc_statement, 2)
275 /* A HANDLER wraps a catch handler for the HANDLER_TYPE. If this is
276 CATCH_ALL_TYPE, then the handler catches all types. The declaration of
277 the catch variable is in HANDLER_PARMS, and the body block in
279 DEFTREECODE (HANDLER, "handler
", tcc_statement, 2)
281 /* A MUST_NOT_THROW_EXPR wraps an expression that may not
282 throw, and must call terminate if it does. The second argument
283 is a condition, used in templates to express noexcept (condition). */
284 DEFTREECODE (MUST_NOT_THROW_EXPR, "must_not_throw_expr
", tcc_expression, 2)
286 /* A CLEANUP_STMT marks the point at which a declaration is fully
287 constructed. The CLEANUP_EXPR is run on behalf of CLEANUP_DECL
288 when CLEANUP_BODY completes. */
289 DEFTREECODE (CLEANUP_STMT, "cleanup_stmt
", tcc_statement, 3)
291 /* Represents an 'if' statement. The operands are IF_COND,
292 THEN_CLAUSE, and ELSE_CLAUSE, and the current scope, respectively. */
293 /* ??? It is currently still necessary to distinguish between IF_STMT
294 and COND_EXPR for the benefit of templates. */
295 DEFTREECODE (IF_STMT, "if_stmt
", tcc_statement, 4)
297 /* Used to represent a `for' statement. The operands are
298 FOR_INIT_STMT, FOR_COND, FOR_EXPR, and FOR_BODY, respectively. */
299 DEFTREECODE (FOR_STMT, "for_stmt
", tcc_statement, 5)
301 /* Used to represent a range-based `for' statement. The operands are
302 RANGE_FOR_DECL, RANGE_FOR_EXPR, RANGE_FOR_BODY, and RANGE_FOR_SCOPE,
303 respectively. Only used in templates. */
304 DEFTREECODE (RANGE_FOR_STMT, "range_for_stmt
", tcc_statement, 4)
306 /* Used to represent a 'while' statement. The operands are WHILE_COND
307 and WHILE_BODY, respectively. */
308 DEFTREECODE (WHILE_STMT, "while_stmt
", tcc_statement, 2)
310 /* Used to represent a 'do' statement. The operands are DO_BODY and
311 DO_COND, respectively. */
312 DEFTREECODE (DO_STMT, "do_stmt
", tcc_statement, 2)
314 /* Used to represent a 'break' statement. */
315 DEFTREECODE (BREAK_STMT, "break_stmt
", tcc_statement, 0)
317 /* Used to represent a 'continue' statement. */
318 DEFTREECODE (CONTINUE_STMT, "continue_stmt
", tcc_statement, 0)
320 /* Used to represent a 'switch' statement. The operands are
321 SWITCH_STMT_COND, SWITCH_STMT_BODY, SWITCH_STMT_TYPE, and
322 SWITCH_STMT_SCOPE, respectively. */
323 DEFTREECODE (SWITCH_STMT, "switch_stmt
", tcc_statement, 4)
325 /* Used to represent an expression statement. Use `EXPR_STMT_EXPR' to
326 obtain the expression. */
327 DEFTREECODE (EXPR_STMT, "expr_stmt
", tcc_expression, 1)
329 DEFTREECODE (TAG_DEFN, "tag_defn
", tcc_expression, 0)
331 /* Represents an 'offsetof' expression during template expansion. */
332 DEFTREECODE (OFFSETOF_EXPR, "offsetof_expr
", tcc_expression, 1)
334 /* Represents the -> operator during template expansion. */
335 DEFTREECODE (ARROW_EXPR, "arrow_expr
", tcc_expression, 1)
337 /* Represents an '__alignof__' expression during template
339 DEFTREECODE (ALIGNOF_EXPR, "alignof_expr
", tcc_expression, 1)
341 /* Represents an Objective-C++ '@encode' expression during template
343 DEFTREECODE (AT_ENCODE_EXPR, "at_encode_expr
", tcc_expression, 1)
345 /* A STMT_EXPR represents a statement-expression during template
346 expansion. This is the GCC extension { ( ... ) }. The
347 STMT_EXPR_STMT is the statement given by the expression. */
348 DEFTREECODE (STMT_EXPR, "stmt_expr
", tcc_expression, 1)
350 /* Unary plus. Operand 0 is the expression to which the unary plus
352 DEFTREECODE (UNARY_PLUS_EXPR, "unary_plus_expr
", tcc_unary, 1)
354 /** C++0x extensions. */
356 /* A static assertion. This is a C++0x extension.
357 STATIC_ASSERT_CONDITION contains the condition that is being
358 checked. STATIC_ASSERT_MESSAGE contains the message (a string
359 literal) to be displayed if the condition fails to hold. */
360 DEFTREECODE (STATIC_ASSERT, "static_assert
", tcc_exceptional, 0)
362 /* Represents an argument pack of types (or templates). An argument
363 pack stores zero or more arguments that will be used to instantiate
366 ARGUMENT_PACK_ARGS retrieves the arguments stored in the argument
370 template<typename... Values>
373 tuple<int, float, double> t;
375 Values is a (template) parameter pack. When tuple<int, float,
376 double> is instantiated, the Values parameter pack is instantiated
377 with the argument pack <int, float, double>. ARGUMENT_PACK_ARGS will
378 be a TREE_VEC containing int, float, and double. */
379 DEFTREECODE (TYPE_ARGUMENT_PACK, "type_argument_pack
", tcc_type, 0)
381 /* Represents an argument pack of values, which can be used either for
382 non-type template arguments or function call arguments.
384 NONTYPE_ARGUMENT_PACK plays precisely the same role as
385 TYPE_ARGUMENT_PACK, but will be used for packing non-type template
386 arguments (e.g., "int... Dimensions
") or function arguments ("const
388 DEFTREECODE (NONTYPE_ARGUMENT_PACK, "nontype_argument_pack
", tcc_expression, 1)
390 /* Represents a type expression that will be expanded into a list of
391 types when instantiated with one or more argument packs.
393 PACK_EXPANSION_PATTERN retrieves the expansion pattern. This is
394 the type or expression that we will substitute into with each
395 argument in an argument pack.
397 SET_PACK_EXPANSION_PATTERN sets the expansion pattern.
399 PACK_EXPANSION_PARAMETER_PACKS contains a TREE_LIST of the parameter
400 packs that are used in this pack expansion.
403 template<typename... Values>
404 struct tied : tuple<Values&...> {
408 The derivation from tuple contains a TYPE_PACK_EXPANSION for the
409 template arguments. Its PACK_EXPANSION_PATTERN is "Values
&" and its
410 PACK_EXPANSION_PARAMETER_PACKS will contain "Values
". */
411 DEFTREECODE (TYPE_PACK_EXPANSION, "type_pack_expansion
", tcc_type, 0)
413 /* Represents an expression that will be expanded into a list of
414 expressions when instantiated with one or more argument packs.
416 EXPR_PACK_EXPANSION plays precisely the same role as TYPE_PACK_EXPANSION,
417 but will be used for expressions. */
418 DEFTREECODE (EXPR_PACK_EXPANSION, "expr_pack_expansion
", tcc_expression, 3)
420 /* Selects the Ith parameter out of an argument pack. This node will
421 be used when instantiating pack expansions; see
422 tsubst_pack_expansion.
424 ARGUMENT_PACK_SELECT_FROM_PACK contains the *_ARGUMENT_PACK node
425 from which the argument will be selected.
427 ARGUMENT_PACK_SELECT_INDEX contains the index into the argument
428 pack that will be returned by this ARGUMENT_PACK_SELECT node. The
429 index is a machine integer. */
430 DEFTREECODE (ARGUMENT_PACK_SELECT, "argument_pack_select
", tcc_exceptional, 0)
432 /** C++ extensions. */
434 /* Represents a trait expression during template expansion. */
435 DEFTREECODE (TRAIT_EXPR, "trait_expr
", tcc_exceptional, 0)
437 /* A lambda expression. This is a C++0x extension.
438 LAMBDA_EXPR_DEFAULT_CAPTURE_MODE is an enum for the default, which may be
440 LAMBDA_EXPR_CAPTURE_LIST holds the capture-list, including `this'.
441 LAMBDA_EXPR_THIS_CAPTURE goes straight to the capture of `this', if it exists.
442 LAMBDA_EXPR_PENDING_PROXIES is a vector of capture proxies which need to
443 be pushed once scope returns to the lambda.
444 LAMBDA_EXPR_MUTABLE_P signals whether this lambda was declared mutable.
445 LAMBDA_EXPR_RETURN_TYPE holds the return type, if it was specified. */
446 DEFTREECODE (LAMBDA_EXPR, "lambda_expr
", tcc_exceptional, 0)
448 /* The declared type of an expression. This is a C++0x extension.
449 DECLTYPE_TYPE_EXPR is the expression whose type we are computing.
450 DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P states whether the
451 expression was parsed as an id-expression or a member access
452 expression. When false, it was parsed as a full expression.
453 DECLTYPE_FOR_LAMBDA_CAPTURE is set if we want lambda capture semantics.
454 DECLTYPE_FOR_LAMBDA_RETURN is set if we want lambda return deduction. */
455 DEFTREECODE (DECLTYPE_TYPE, "decltype_type
", tcc_type, 0)
457 /* A type designated by `__underlying_type (type)'.
458 UNDERLYING_TYPE_TYPE is the type in question. */
459 DEFTREECODE (UNDERLYING_TYPE, "underlying_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 /* Used to represent the template information stored by template
468 TI_TEMPLATE the template declaration associated to the specialization
469 TI_ARGS the arguments of the template specialization
470 TI_TYPEDEFS_NEEDING_ACCESS_CHECKING the vector of typedefs used in
471 the pattern of the template for which access check is needed at template
472 instantiation time. */
473 DEFTREECODE (TEMPLATE_INFO, "template_info
", tcc_exceptional, 0)
477 /* Used to represent information associated with constrained declarations. */
478 DEFTREECODE (CONSTRAINT_INFO, "constraint_info
", tcc_exceptional, 0)
480 /* A requires-expr is a binary expression. The first operand is its
481 parameter list. The second is a list of requirements. */
482 DEFTREECODE (REQUIRES_EXPR, "requires_expr
", tcc_expression, 2)
484 /* The REQ expressions are unary expressions that specify individual
485 statements in a requires clause. */
486 DEFTREECODE (EXPR_REQ, "expr
-req
", tcc_expression, 1)
487 DEFTREECODE (TYPE_REQ, "type
-req
", tcc_expression, 1)
488 DEFTREECODE (NESTED_REQ, "nested
-req
", tcc_expression, 1)
490 /* A unary expression representing a requirement for a valid expression. */
491 DEFTREECODE (VALIDEXPR_EXPR, "validexpr_expr
", tcc_expression, 1)
493 /* A unary expression representing a requirement for a valid type. */
494 DEFTREECODE (VALIDTYPE_EXPR, "validtype_expr
", tcc_expression, 1)
496 /* A unary expression representing a requirement for an expression that
497 can be evaluated at compile time. */
498 DEFTREECODE (CONSTEXPR_EXPR, "contexpr_expr
", tcc_expression, 1)