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8d08fdba MS |
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). | |
7adcbafe | 4 | Copyright (C) 1987-2022 Free Software Foundation, Inc. |
8d08fdba MS |
5 | Hacked by Michael Tiemann (tiemann@cygnus.com) |
6 | ||
b599b135 | 7 | This file is part of GCC. |
8d08fdba | 8 | |
b599b135 | 9 | GCC is free software; you can redistribute it and/or modify |
8d08fdba | 10 | it under the terms of the GNU General Public License as published by |
e77f031d | 11 | the Free Software Foundation; either version 3, or (at your option) |
8d08fdba MS |
12 | any later version. |
13 | ||
b599b135 | 14 | GCC is distributed in the hope that it will be useful, |
8d08fdba MS |
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. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
e77f031d NC |
20 | along with GCC; see the file COPYING3. If not see |
21 | <http://www.gnu.org/licenses/>. */ | |
8d08fdba | 22 | |
c8094d83 | 23 | |
4ba126e4 MM |
24 | /* An OFFSET_REF is used in two situations: |
25 | ||
26 | 1. An expression of the form `A::m' where `A' is a class and `m' is | |
d6b4ea85 MM |
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'). | |
4ba126e4 MM |
30 | |
31 | The expression is a pointer-to-member if its address is taken, | |
6d05585b MM |
32 | but simply denotes a member of the object if its address is not |
33 | taken. | |
c8094d83 | 34 | |
d6b4ea85 MM |
35 | This form is only used during the parsing phase; once semantic |
36 | analysis has taken place they are eliminated. | |
4ba126e4 MM |
37 | |
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 | |
d6b4ea85 | 40 | expression with pointer-to-member type. */ |
6615c446 | 41 | DEFTREECODE (OFFSET_REF, "offset_ref", tcc_reference, 2) |
8d08fdba | 42 | |
61a127b3 MM |
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'. */ | |
6615c446 | 46 | DEFTREECODE (PTRMEM_CST, "ptrmem_cst", tcc_constant, 0) |
61a127b3 | 47 | |
02531345 JM |
48 | /* For NEW_EXPR, operand 0 is the placement list. |
49 | Operand 1 is the new-declarator. | |
058b15c1 MM |
50 | Operand 2 is the number of elements in the array. |
51 | Operand 3 is the initializer. */ | |
6615c446 JO |
52 | DEFTREECODE (NEW_EXPR, "nw_expr", tcc_expression, 4) |
53 | DEFTREECODE (VEC_NEW_EXPR, "vec_nw_expr", tcc_expression, 3) | |
02531345 | 54 | |
8d08fdba MS |
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. */ | |
6615c446 JO |
58 | DEFTREECODE (DELETE_EXPR, "dl_expr", tcc_expression, 2) |
59 | DEFTREECODE (VEC_DELETE_EXPR, "vec_dl_expr", tcc_expression, 2) | |
8d08fdba MS |
60 | |
61 | /* Value is reference to particular overloaded class method. | |
c8a209ca | 62 | Operand 0 is the class, operand 1 is the field |
8d08fdba | 63 | The COMPLEXITY field holds the class level (usually 0). */ |
6615c446 | 64 | DEFTREECODE (SCOPE_REF, "scope_ref", tcc_reference, 2) |
8d08fdba MS |
65 | |
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). */ | |
6615c446 | 69 | DEFTREECODE (MEMBER_REF, "member_ref", tcc_reference, 2) |
8d08fdba MS |
70 | |
71 | /* Type conversion operator in C++. TREE_TYPE is type that this | |
72 | operator converts to. Operand is expression to be converted. */ | |
6615c446 | 73 | DEFTREECODE (TYPE_EXPR, "type_expr", tcc_expression, 1) |
8d08fdba | 74 | |
5039610b SL |
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) | |
8d08fdba | 81 | |
d5f4eddd JM |
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 | |
b73a4704 JM |
84 | is the initializer. */ |
85 | DEFTREECODE (VEC_INIT_EXPR, "vec_init_expr", tcc_expression, 2) | |
d5f4eddd | 86 | |
8d2733ca MS |
87 | /* A throw expression. operand 0 is the expression, if there was one, |
88 | else it is NULL_TREE. */ | |
6615c446 | 89 | DEFTREECODE (THROW_EXPR, "throw_expr", tcc_expression, 1) |
8d08fdba | 90 | |
699ed0ce MM |
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. */ | |
6615c446 | 93 | DEFTREECODE (EMPTY_CLASS_EXPR, "empty_class_expr", tcc_expression, 0) |
699ed0ce | 94 | |
50ad9642 MM |
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 | |
c8094d83 | 101 | base used to name the functions. |
50ad9642 MM |
102 | |
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 | |
324f9dfb | 106 | overloaded. */ |
6615c446 | 107 | DEFTREECODE (BASELINK, "baselink", tcc_exceptional, 0) |
50ad9642 | 108 | |
8d08fdba MS |
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 | |
111 | accessing this data. | |
0cbd7506 MS |
112 | DECL_ARGUMENTS template parm vector |
113 | DECL_TEMPLATE_INFO template text &c | |
8d08fdba MS |
114 | DECL_VINDEX list of instantiations already produced; |
115 | only done for functions so far | |
116 | For class template: | |
0cbd7506 MS |
117 | DECL_INITIAL associated templates (methods &c) |
118 | DECL_TEMPLATE_RESULT null | |
8d08fdba MS |
119 | For non-class templates: |
120 | TREE_TYPE type of object to be constructed | |
0cbd7506 MS |
121 | DECL_TEMPLATE_RESULT decl for object to be created |
122 | (e.g., FUNCTION_DECL with tmpl parms used) | |
8d08fdba | 123 | */ |
6615c446 | 124 | DEFTREECODE (TEMPLATE_DECL, "template_decl", tcc_declaration, 0) |
8d08fdba | 125 | |
f84b4be9 JM |
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. | |
129 | ||
130 | Here's an example: | |
c8094d83 | 131 | |
f84b4be9 JM |
132 | template <class T> // Index 0, Level 1. |
133 | struct S | |
134 | { | |
135 | template <class U, // Index 0, Level 2. | |
0cbd7506 | 136 | class V> // Index 1, Level 2. |
f84b4be9 | 137 | void f(); |
c8094d83 | 138 | }; |
f84b4be9 JM |
139 | |
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: | |
148 | ||
149 | struct S<int> | |
150 | { | |
151 | template <class U, // Index 0, Level 1, Orig Level 2 | |
0cbd7506 | 152 | class V> // Index 1, Level 1, Orig Level 2 |
f84b4be9 JM |
153 | void f(); |
154 | }; | |
c8094d83 | 155 | |
f84b4be9 JM |
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. */ | |
6615c446 | 159 | DEFTREECODE (TEMPLATE_PARM_INDEX, "template_parm_index", tcc_exceptional, 0) |
f84b4be9 | 160 | |
1899c3a4 | 161 | /* Index into a template parameter list for template template parameters. |
c8094d83 | 162 | This parameter must be a type. The TYPE_FIELDS value will be a |
1899c3a4 KL |
163 | TEMPLATE_PARM_INDEX. |
164 | ||
c8094d83 | 165 | It is used without template arguments like TT in C<TT>, |
1f81b321 | 166 | TYPE_NAME is a TEMPLATE_DECL. */ |
6615c446 | 167 | DEFTREECODE (TEMPLATE_TEMPLATE_PARM, "template_template_parm", tcc_type, 0) |
1899c3a4 | 168 | |
38b3627d NS |
169 | /* The ordering of the following codes is optimized for the checking |
170 | macros in tree.h. Changing the order will degrade the speed of the | |
171 | compiler. TEMPLATE_TYPE_PARM, TYPENAME_TYPE, TYPEOF_TYPE, | |
172 | BOUND_TEMPLATE_TEMPLATE_PARM. */ | |
c8094d83 | 173 | |
38b3627d | 174 | /* Index into a template parameter list. This parameter must be a type. |
438d94ed | 175 | The type.values field will be a TEMPLATE_PARM_INDEX. */ |
38b3627d | 176 | DEFTREECODE (TEMPLATE_TYPE_PARM, "template_type_parm", tcc_type, 0) |
73b0fce8 | 177 | |
45869a6c | 178 | /* A type designated by `typename T::t'. TYPE_CONTEXT is `T', |
78638e24 MM |
179 | TYPE_NAME is an IDENTIFIER_NODE for `t'. If the type was named via |
180 | template-id, TYPENAME_TYPE_FULLNAME will hold the TEMPLATE_ID_EXPR. | |
fc6a28d7 | 181 | TREE_TYPE is always NULL. */ |
6615c446 | 182 | DEFTREECODE (TYPENAME_TYPE, "typename_type", tcc_type, 0) |
5566b478 | 183 | |
38b3627d NS |
184 | /* A type designated by `__typeof (expr)'. TYPEOF_TYPE_EXPR is the |
185 | expression in question. */ | |
186 | DEFTREECODE (TYPEOF_TYPE, "typeof_type", tcc_type, 0) | |
187 | ||
c8094d83 | 188 | /* Like TEMPLATE_TEMPLATE_PARM it is used with bound template arguments |
38b3627d NS |
189 | like TT<int>. |
190 | In this case, TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO contains the | |
191 | template name and its bound arguments. TYPE_NAME is a TYPE_DECL. */ | |
192 | DEFTREECODE (BOUND_TEMPLATE_TEMPLATE_PARM, "bound_template_template_parm", | |
193 | tcc_type, 0) | |
194 | ||
b8c6534b KL |
195 | /* For template template argument of the form `T::template C'. |
196 | TYPE_CONTEXT is `T', the template parameter dependent object. | |
31dbaab5 NS |
197 | TYPE_NAME is a TEMPLATE_DECL, whose DECL_TEMPLATE_PARMS are any |
198 | template parms of the instantiation. That decl's DECL_NAME is the | |
199 | IDENTIFIER_NODE for `C', the member class template. */ | |
6615c446 | 200 | DEFTREECODE (UNBOUND_CLASS_TEMPLATE, "unbound_class_template", tcc_type, 0) |
b8c6534b | 201 | |
98ed9dae | 202 | /* A using declaration. USING_DECL_SCOPE contains the specified |
f4da28a0 JM |
203 | scope. In a variadic using-declaration, this is a TYPE_PACK_EXPANSION. |
204 | In a member using decl, unless DECL_DEPENDENT_P is true, | |
98ed9dae NS |
205 | USING_DECL_DECLS contains the _DECL or OVERLOAD so named. This is |
206 | not an alias, but is later expanded into multiple aliases. */ | |
6615c446 | 207 | DEFTREECODE (USING_DECL, "using_decl", tcc_declaration, 0) |
5566b478 | 208 | |
c8094d83 | 209 | /* A using directive. The operand is USING_STMT_NAMESPACE. */ |
11324716 | 210 | DEFTREECODE (USING_STMT, "using_stmt", tcc_statement, 1) |
9da99f7d | 211 | |
7b49e3da | 212 | /* An un-parsed operand. Holds a vector of input tokens and |
01ea1ea8 | 213 | a vector of places where the argument was instantiated before |
7b49e3da MP |
214 | parsing had occurred. This is used for default arguments, delayed |
215 | NSDMIs, and noexcept-specifier parsing. */ | |
216 | DEFTREECODE (DEFERRED_PARSE, "deferred_parse", tcc_exceptional, 0) | |
42976354 | 217 | |
b15ea309 JM |
218 | /* An uninstantiated/unevaluated noexcept-specification. For the |
219 | uninstantiated case, DEFERRED_NOEXCEPT_PATTERN is the pattern from the | |
220 | template, and DEFERRED_NOEXCEPT_ARGS are the template arguments to | |
221 | substitute into the pattern when needed. For the unevaluated case, | |
222 | those slots are NULL_TREE and we use get_defaulted_eh_spec to find | |
223 | the exception-specification. */ | |
10261728 JM |
224 | DEFTREECODE (DEFERRED_NOEXCEPT, "deferred_noexcept", tcc_exceptional, 0) |
225 | ||
8f032717 | 226 | /* A template-id, like foo<int>. The first operand is the template. |
bf12d54d NS |
227 | The second is NULL if there are no explicit arguments, or a |
228 | TREE_VEC of arguments. The template will be a FUNCTION_DECL, | |
229 | TEMPLATE_DECL, or an OVERLOAD. If the template-id refers to a | |
230 | member template, the template may be an IDENTIFIER_NODE. */ | |
6615c446 | 231 | DEFTREECODE (TEMPLATE_ID_EXPR, "template_id_expr", tcc_expression, 2) |
386b8a85 | 232 | |
5256a7f5 | 233 | /* One of a set of overloaded functions. */ |
6615c446 | 234 | DEFTREECODE (OVERLOAD, "overload", tcc_exceptional, 0) |
2c73f9f5 | 235 | |
05f7a2af NS |
236 | /* A vector of binding slots. */ |
237 | DEFTREECODE (BINDING_VECTOR, "binding_vector", tcc_exceptional, 0) | |
238 | ||
9f4faeae MM |
239 | /* A pseudo-destructor, of the form "OBJECT.~DESTRUCTOR" or |
240 | "OBJECT.SCOPE::~DESTRUCTOR. The first operand is the OBJECT. The | |
241 | second operand (if non-NULL) is the SCOPE. The third operand is | |
242 | the TYPE node corresponding to the DESTRUCTOR. The type of the | |
c8094d83 | 243 | first operand will always be a scalar type. |
9f4faeae MM |
244 | |
245 | The type of a PSEUDO_DTOR_EXPR is always "void", even though it can | |
246 | be used as if it were a zero-argument function. We handle the | |
247 | function-call case specially, and giving it "void" type prevents it | |
c8094d83 | 248 | being used in expressions in ways that are not permitted. */ |
9f4faeae MM |
249 | DEFTREECODE (PSEUDO_DTOR_EXPR, "pseudo_dtor_expr", tcc_expression, 3) |
250 | ||
42976354 BK |
251 | /* A whole bunch of tree codes for the initial, superficial parsing of |
252 | templates. */ | |
6615c446 JO |
253 | DEFTREECODE (MODOP_EXPR, "modop_expr", tcc_expression, 3) |
254 | DEFTREECODE (CAST_EXPR, "cast_expr", tcc_unary, 1) | |
255 | DEFTREECODE (REINTERPRET_CAST_EXPR, "reinterpret_cast_expr", tcc_unary, 1) | |
256 | DEFTREECODE (CONST_CAST_EXPR, "const_cast_expr", tcc_unary, 1) | |
257 | DEFTREECODE (STATIC_CAST_EXPR, "static_cast_expr", tcc_unary, 1) | |
258 | DEFTREECODE (DYNAMIC_CAST_EXPR, "dynamic_cast_expr", tcc_unary, 1) | |
a4474a38 | 259 | DEFTREECODE (IMPLICIT_CONV_EXPR, "implicit_conv_expr", tcc_unary, 1) |
6615c446 JO |
260 | DEFTREECODE (DOTSTAR_EXPR, "dotstar_expr", tcc_expression, 2) |
261 | DEFTREECODE (TYPEID_EXPR, "typeid_expr", tcc_expression, 1) | |
0a766368 | 262 | DEFTREECODE (NOEXCEPT_EXPR, "noexcept_expr", tcc_unary, 1) |
b7689b96 | 263 | DEFTREECODE (SPACESHIP_EXPR, "spaceship_expr", tcc_expression, 2) |
0a6969ad | 264 | |
d17811fd MM |
265 | /* A placeholder for an expression that is not type-dependent, but |
266 | does occur in a template. When an expression that is not | |
267 | type-dependent appears in a larger expression, we must compute the | |
268 | type of that larger expression. That computation would normally | |
269 | modify the original expression, which would change the mangling of | |
270 | that expression if it appeared in a template argument list. In | |
271 | that situation, we create a NON_DEPENDENT_EXPR to take the place of | |
018a5803 | 272 | the original expression. The expression is the only operand -- it |
324f9dfb | 273 | is only needed for diagnostics. */ |
6615c446 | 274 | DEFTREECODE (NON_DEPENDENT_EXPR, "non_dependent_expr", tcc_expression, 1) |
d17811fd | 275 | |
ade3dc07 JM |
276 | /* CTOR_INITIALIZER is a placeholder in template code for a call to |
277 | setup_vtbl_pointer (and appears in all functions, not just ctors). */ | |
6615c446 | 278 | DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer", tcc_expression, 1) |
5a508662 | 279 | |
93cfbc5c | 280 | DEFTREECODE (TRY_BLOCK, "try_block", tcc_statement, 2) |
5a508662 | 281 | |
93cfbc5c | 282 | DEFTREECODE (EH_SPEC_BLOCK, "eh_spec_block", tcc_statement, 2) |
5a508662 | 283 | |
1a6025b4 JM |
284 | /* A HANDLER wraps a catch handler for the HANDLER_TYPE. If this is |
285 | CATCH_ALL_TYPE, then the handler catches all types. The declaration of | |
286 | the catch variable is in HANDLER_PARMS, and the body block in | |
287 | HANDLER_BODY. */ | |
93cfbc5c | 288 | DEFTREECODE (HANDLER, "handler", tcc_statement, 2) |
0a6969ad | 289 | |
52a11cbf | 290 | /* A MUST_NOT_THROW_EXPR wraps an expression that may not |
f2162c3d TR |
291 | throw, and must call terminate if it does. The second argument |
292 | is a condition, used in templates to express noexcept (condition). */ | |
293 | DEFTREECODE (MUST_NOT_THROW_EXPR, "must_not_throw_expr", tcc_expression, 2) | |
52a11cbf | 294 | |
5a508662 RH |
295 | /* A CLEANUP_STMT marks the point at which a declaration is fully |
296 | constructed. The CLEANUP_EXPR is run on behalf of CLEANUP_DECL | |
297 | when CLEANUP_BODY completes. */ | |
93cfbc5c | 298 | DEFTREECODE (CLEANUP_STMT, "cleanup_stmt", tcc_statement, 3) |
5a508662 RH |
299 | |
300 | /* Represents an 'if' statement. The operands are IF_COND, | |
545f261b | 301 | THEN_CLAUSE, and ELSE_CLAUSE, and the current scope, respectively. */ |
c8094d83 | 302 | /* ??? It is currently still necessary to distinguish between IF_STMT |
5a508662 | 303 | and COND_EXPR for the benefit of templates. */ |
545f261b | 304 | DEFTREECODE (IF_STMT, "if_stmt", tcc_statement, 4) |
5a508662 | 305 | |
f9132eb7 | 306 | /* Used to represent a range-based `for' statement. The operands are |
8112667c MP |
307 | RANGE_FOR_DECL, RANGE_FOR_EXPR, RANGE_FOR_BODY, RANGE_FOR_SCOPE, |
308 | RANGE_FOR_UNROLL, and RANGE_FOR_INIT_STMT, respectively. Only used in | |
309 | templates. */ | |
310 | DEFTREECODE (RANGE_FOR_STMT, "range_for_stmt", tcc_statement, 6) | |
f9132eb7 | 311 | |
934790cc ILT |
312 | /* Used to represent an expression statement. Use `EXPR_STMT_EXPR' to |
313 | obtain the expression. */ | |
314 | DEFTREECODE (EXPR_STMT, "expr_stmt", tcc_expression, 1) | |
315 | ||
6615c446 | 316 | DEFTREECODE (TAG_DEFN, "tag_defn", tcc_expression, 0) |
5ffe581d | 317 | |
42c244d8 | 318 | /* Represents an 'offsetof' expression during template expansion. */ |
905d2812 | 319 | DEFTREECODE (OFFSETOF_EXPR, "offsetof_expr", tcc_expression, 2) |
42c244d8 | 320 | |
be845b04 JJ |
321 | /* Represents an '__builtin_addressof' expression during template |
322 | expansion. This is similar to ADDR_EXPR, but it doesn't invoke | |
323 | overloaded & operators. */ | |
324 | DEFTREECODE (ADDRESSOF_EXPR, "addressof_expr", tcc_expression, 1) | |
325 | ||
03a08664 ILT |
326 | /* Represents the -> operator during template expansion. */ |
327 | DEFTREECODE (ARROW_EXPR, "arrow_expr", tcc_expression, 1) | |
328 | ||
329 | /* Represents an '__alignof__' expression during template | |
330 | expansion. */ | |
0161fcff | 331 | DEFTREECODE (ALIGNOF_EXPR, "alignof_expr", tcc_expression, 1) |
03a08664 | 332 | |
b67bc44c NP |
333 | /* Represents an Objective-C++ '@encode' expression during template |
334 | expansion. */ | |
c154b3d8 | 335 | DEFTREECODE (AT_ENCODE_EXPR, "at_encode_expr", tcc_expression, 1) |
b67bc44c | 336 | |
c3e5898b ILT |
337 | /* A STMT_EXPR represents a statement-expression during template |
338 | expansion. This is the GCC extension { ( ... ) }. The | |
339 | STMT_EXPR_STMT is the statement given by the expression. */ | |
340 | DEFTREECODE (STMT_EXPR, "stmt_expr", tcc_expression, 1) | |
341 | ||
392e3d51 RS |
342 | /* Unary plus. Operand 0 is the expression to which the unary plus |
343 | is applied. */ | |
344 | DEFTREECODE (UNARY_PLUS_EXPR, "unary_plus_expr", tcc_unary, 1) | |
345 | ||
8d0cf15e | 346 | /** C++11 extensions. */ |
55a3debe | 347 | |
8d0cf15e | 348 | /* A static assertion. This is a C++11 extension. |
55a3debe DG |
349 | STATIC_ASSERT_CONDITION contains the condition that is being |
350 | checked. STATIC_ASSERT_MESSAGE contains the message (a string | |
351 | literal) to be displayed if the condition fails to hold. */ | |
352 | DEFTREECODE (STATIC_ASSERT, "static_assert", tcc_exceptional, 0) | |
353 | ||
5d80a306 DG |
354 | /* Represents an argument pack of types (or templates). An argument |
355 | pack stores zero or more arguments that will be used to instantiate | |
356 | a parameter pack. | |
357 | ||
358 | ARGUMENT_PACK_ARGS retrieves the arguments stored in the argument | |
359 | pack. | |
360 | ||
361 | Example: | |
362 | template<typename... Values> | |
363 | class tuple { ... }; | |
364 | ||
365 | tuple<int, float, double> t; | |
366 | ||
367 | Values is a (template) parameter pack. When tuple<int, float, | |
368 | double> is instantiated, the Values parameter pack is instantiated | |
a757b5c5 | 369 | with the argument pack <int, float, double>. ARGUMENT_PACK_ARGS will |
5d80a306 DG |
370 | be a TREE_VEC containing int, float, and double. */ |
371 | DEFTREECODE (TYPE_ARGUMENT_PACK, "type_argument_pack", tcc_type, 0) | |
372 | ||
373 | /* Represents an argument pack of values, which can be used either for | |
374 | non-type template arguments or function call arguments. | |
375 | ||
376 | NONTYPE_ARGUMENT_PACK plays precisely the same role as | |
377 | TYPE_ARGUMENT_PACK, but will be used for packing non-type template | |
378 | arguments (e.g., "int... Dimensions") or function arguments ("const | |
379 | Args&... args"). */ | |
380 | DEFTREECODE (NONTYPE_ARGUMENT_PACK, "nontype_argument_pack", tcc_expression, 1) | |
381 | ||
382 | /* Represents a type expression that will be expanded into a list of | |
383 | types when instantiated with one or more argument packs. | |
384 | ||
385 | PACK_EXPANSION_PATTERN retrieves the expansion pattern. This is | |
386 | the type or expression that we will substitute into with each | |
387 | argument in an argument pack. | |
388 | ||
5d80a306 DG |
389 | PACK_EXPANSION_PARAMETER_PACKS contains a TREE_LIST of the parameter |
390 | packs that are used in this pack expansion. | |
391 | ||
392 | Example: | |
393 | template<typename... Values> | |
394 | struct tied : tuple<Values&...> { | |
395 | // ... | |
396 | }; | |
397 | ||
398 | The derivation from tuple contains a TYPE_PACK_EXPANSION for the | |
f96d6fd0 | 399 | template arguments. Its PACK_EXPANSION_PATTERN is "Values&" and its |
5d80a306 DG |
400 | PACK_EXPANSION_PARAMETER_PACKS will contain "Values". */ |
401 | DEFTREECODE (TYPE_PACK_EXPANSION, "type_pack_expansion", tcc_type, 0) | |
402 | ||
403 | /* Represents an expression that will be expanded into a list of | |
404 | expressions when instantiated with one or more argument packs. | |
405 | ||
406 | EXPR_PACK_EXPANSION plays precisely the same role as TYPE_PACK_EXPANSION, | |
407 | but will be used for expressions. */ | |
c67dd256 | 408 | DEFTREECODE (EXPR_PACK_EXPANSION, "expr_pack_expansion", tcc_expression, 3) |
5d80a306 DG |
409 | |
410 | /* Selects the Ith parameter out of an argument pack. This node will | |
411 | be used when instantiating pack expansions; see | |
412 | tsubst_pack_expansion. | |
413 | ||
414 | ARGUMENT_PACK_SELECT_FROM_PACK contains the *_ARGUMENT_PACK node | |
415 | from which the argument will be selected. | |
416 | ||
417 | ARGUMENT_PACK_SELECT_INDEX contains the index into the argument | |
418 | pack that will be returned by this ARGUMENT_PACK_SELECT node. The | |
419 | index is a machine integer. */ | |
420 | DEFTREECODE (ARGUMENT_PACK_SELECT, "argument_pack_select", tcc_exceptional, 0) | |
421 | ||
378b307d AS |
422 | /* Fold expressions allow the expansion of a template argument pack |
423 | over a binary operator. | |
424 | ||
425 | FOLD_EXPR_MOD_P is true when the fold operation is a compound assignment | |
426 | operator. | |
427 | ||
428 | FOLD_EXPR_OP is an INTEGER_CST storing the tree code for the folded | |
429 | expression. Note that when FOLDEXPR_MOD_P is true, the operator is | |
430 | a compound assignment operator for that kind of expression. | |
431 | ||
432 | FOLD_EXPR_PACK is an expression containing an unexpanded parameter pack; | |
433 | when expanded, each term becomes an argument of the folded expression. | |
434 | ||
435 | In a BINARY_FOLD_EXPRESSION, FOLD_EXPR_INIT is the non-pack argument. */ | |
436 | DEFTREECODE (UNARY_LEFT_FOLD_EXPR, "unary_left_fold_expr", tcc_expression, 2) | |
437 | DEFTREECODE (UNARY_RIGHT_FOLD_EXPR, "unary_right_fold_expr", tcc_expression, 2) | |
438 | DEFTREECODE (BINARY_LEFT_FOLD_EXPR, "binary_left_fold_expr", tcc_expression, 3) | |
439 | DEFTREECODE (BINARY_RIGHT_FOLD_EXPR, "binary_right_fold_expr", tcc_expression, 3) | |
440 | ||
896048cf JJ |
441 | /* Represents the __builtin_bit_cast (type, expr) expression. |
442 | The type is in TREE_TYPE, expression in TREE_OPERAND (bitcast, 0). */ | |
443 | DEFTREECODE (BIT_CAST_EXPR, "bit_cast_expr", tcc_expression, 1) | |
378b307d | 444 | |
cb68ec50 PC |
445 | /** C++ extensions. */ |
446 | ||
817e878a | 447 | /* Represents a templated trait that yields an expression. */ |
cb68ec50 PC |
448 | DEFTREECODE (TRAIT_EXPR, "trait_expr", tcc_exceptional, 0) |
449 | ||
817e878a PP |
450 | /* Represents a templated trait that yields a type. */ |
451 | DEFTREECODE (TRAIT_TYPE, "trait_type", tcc_type, 0) | |
452 | ||
d5f4eddd JM |
453 | /* A lambda expression. This is a C++0x extension. |
454 | LAMBDA_EXPR_DEFAULT_CAPTURE_MODE is an enum for the default, which may be | |
455 | none. | |
456 | LAMBDA_EXPR_CAPTURE_LIST holds the capture-list, including `this'. | |
457 | LAMBDA_EXPR_THIS_CAPTURE goes straight to the capture of `this', if it exists. | |
61ca4737 JM |
458 | LAMBDA_EXPR_PENDING_PROXIES is a vector of capture proxies which need to |
459 | be pushed once scope returns to the lambda. | |
9925f216 | 460 | LAMBDA_EXPR_MUTABLE_P signals whether this lambda was declared mutable. */ |
d5f4eddd JM |
461 | DEFTREECODE (LAMBDA_EXPR, "lambda_expr", tcc_exceptional, 0) |
462 | ||
3ad6a8e1 DG |
463 | /* The declared type of an expression. This is a C++0x extension. |
464 | DECLTYPE_TYPE_EXPR is the expression whose type we are computing. | |
465 | DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P states whether the | |
466 | expression was parsed as an id-expression or a member access | |
d5f4eddd JM |
467 | expression. When false, it was parsed as a full expression. |
468 | DECLTYPE_FOR_LAMBDA_CAPTURE is set if we want lambda capture semantics. | |
469 | DECLTYPE_FOR_LAMBDA_RETURN is set if we want lambda return deduction. */ | |
3ad6a8e1 DG |
470 | DEFTREECODE (DECLTYPE_TYPE, "decltype_type", tcc_type, 0) |
471 | ||
4daba884 BK |
472 | /* A type designated by one of the bases type traits. |
473 | BASES_TYPE is the type in question. */ | |
474 | DEFTREECODE (BASES, "bases", tcc_type, 0) | |
475 | ||
bb2a7f80 PP |
476 | /* Dependent operator expressions are given this type rather than a NULL_TREE |
477 | type so that we have somewhere to stash the result of phase 1 name lookup | |
478 | (namely into DEPENDENT_OPERATOR_TYPE_SAVED_LOOKUPS). */ | |
479 | DEFTREECODE (DEPENDENT_OPERATOR_TYPE, "dependent_operator_type", tcc_type, 0) | |
480 | ||
aa373032 DS |
481 | /* Used to represent the template information stored by template |
482 | specializations. | |
483 | The accessors are: | |
484 | TI_TEMPLATE the template declaration associated to the specialization | |
485 | TI_ARGS the arguments of the template specialization | |
486 | TI_TYPEDEFS_NEEDING_ACCESS_CHECKING the vector of typedefs used in | |
487 | the pattern of the template for which access check is needed at template | |
488 | instantiation time. */ | |
489 | DEFTREECODE (TEMPLATE_INFO, "template_info", tcc_exceptional, 0) | |
490 | ||
28567c40 JJ |
491 | /* OpenMP - #pragma omp depobj |
492 | Operand 0: OMP_DEPOBJ_DEPOBJ: Depobj expression | |
493 | Operand 1: OMP_DEPOBJ_CLAUSES: List of clauses. */ | |
494 | DEFTREECODE (OMP_DEPOBJ, "omp_depobj", tcc_statement, 2) | |
495 | ||
971e17ff AS |
496 | /* Extensions for Concepts. */ |
497 | ||
498 | /* Used to represent information associated with constrained declarations. */ | |
499 | DEFTREECODE (CONSTRAINT_INFO, "constraint_info", tcc_exceptional, 0) | |
500 | ||
501 | /* A wildcard declaration is a placeholder for a template parameter | |
502 | used to resolve constrained-type-names in concepts. During | |
503 | resolution, the matching argument is saved as the TREE_TYPE | |
504 | of the wildcard. */ | |
505 | DEFTREECODE (WILDCARD_DECL, "wildcard_decl", tcc_declaration, 0) | |
506 | ||
b28b621a | 507 | /* A requires-expr has three operands. The first operand is |
971e17ff AS |
508 | its parameter list (possibly NULL). The second is a list of |
509 | requirements, which are denoted by the _REQ* tree codes | |
b28b621a PP |
510 | below. The third is a TREE_VEC of template arguments to |
511 | be applied when substituting into the parameter list and | |
512 | requirements, set by tsubst_requires_expr for partial instantiations. */ | |
513 | DEFTREECODE (REQUIRES_EXPR, "requires_expr", tcc_expression, 3) | |
971e17ff AS |
514 | |
515 | /* A requirement for an expression. */ | |
516 | DEFTREECODE (SIMPLE_REQ, "simple_req", tcc_expression, 1) | |
517 | ||
518 | /* A requirement for a type. */ | |
519 | DEFTREECODE (TYPE_REQ, "type_req", tcc_expression, 1) | |
520 | ||
521 | /* A requirement for an expression and its properties. The | |
522 | first operand is the expression, and the 2nd is its type. | |
523 | The accessor COMPOUND_REQ_NOEXCEPT determines whether | |
524 | the noexcept keyword was present. */ | |
525 | DEFTREECODE (COMPOUND_REQ, "compound_req", tcc_expression, 2) | |
526 | ||
527 | /* A requires clause within a requires expression. */ | |
528 | DEFTREECODE (NESTED_REQ, "nested_req", tcc_expression, 1) | |
529 | ||
530 | /* Constraints are modeled as kinds of expressions. | |
531 | The operands of a constraint can be either types or expressions. | |
532 | Unlike expressions, constraints do not have a type. */ | |
533 | ||
cb57504a JM |
534 | /* An atomic constraint evaluates an expression E. The operand of the |
535 | constraint is its parameter mapping. The actual expression is stored | |
536 | in the context. | |
537 | ||
538 | ATOMIC_CONSTR_INFO provides source info to support diagnostics. | |
539 | ATOMIC_CONSTR_EXPR has the expression to be evaluated. | |
540 | ATOMIC_CONSTR_PARMS is the parameter mapping for the atomic constraint | |
541 | and is stored in the type field. */ | |
542 | DEFTREECODE (ATOMIC_CONSTR, "atomic_constr", tcc_expression, 1) | |
543 | ||
544 | /* The conjunction and disjunction of two constraints, respectively. | |
545 | Operands are accessed using TREE_OPERAND. The third operand provides | |
546 | source info for diagnostics. | |
971e17ff | 547 | |
cb57504a JM |
548 | CONJ_CONSTR_INFO and DISJ_CONSTR_INFO provide access to the source |
549 | information of constraints, which is stored in the TREE_TYPE. */ | |
550 | DEFTREECODE (CONJ_CONSTR, "conj_constr", tcc_expression, 2) | |
551 | DEFTREECODE (DISJ_CONSTR, "disj_constr", tcc_expression, 2) | |
971e17ff | 552 | |
f078dc7d AS |
553 | /* A check constraint represents the checking of a concept |
554 | C. It has two operands: the template defining the concept | |
555 | and a sequence of template arguments. | |
556 | ||
557 | CHECK_CONSTR_CONCEPT has the concept definition | |
558 | CHECK_CONSTR_ARGUMENTS are the template arguments */ | |
559 | DEFTREECODE (CHECK_CONSTR, "check_constr", tcc_expression, 2) | |
560 | ||
49789fd0 IS |
561 | /* The co_await expression is used to support coroutines. |
562 | ||
563 | Op 0 is the cast expresssion (potentially modified by the | |
564 | promise "await_transform()" method). | |
565 | Op1 is a proxy for the temp / coro frame slot 'e' value. | |
566 | Op2 is the initialiser for Op1 (Op0, potentially modified by any | |
567 | applicable 'co_await' operator). | |
568 | Op3 is a vector of the [0] e.ready, [1] e.suspend and [2] e.resume calls. | |
569 | Op4 is a mode : 0 (await) 1 (yield) 2 (initial) 3 (final) */ | |
570 | DEFTREECODE (CO_AWAIT_EXPR, "co_await", tcc_expression, 5) | |
571 | ||
572 | /* The co_yield expression is used to support coroutines. | |
573 | ||
574 | Op0 is the original expr (for use in diagnostics) | |
575 | Op2 is the co_await derived from this. */ | |
576 | DEFTREECODE (CO_YIELD_EXPR, "co_yield", tcc_expression, 2) | |
577 | ||
578 | /* The co_return expression is used to support coroutines. | |
579 | ||
580 | Op0 is the original expr, can be void (for use in diagnostics) | |
60883271 | 581 | Op1 is the promise return_xxxx call for for the expression given. */ |
49789fd0 | 582 | |
60883271 | 583 | DEFTREECODE (CO_RETURN_EXPR, "co_return", tcc_statement, 2) |
49789fd0 | 584 | |
f84b4be9 JM |
585 | /* |
586 | Local variables: | |
587 | mode:c | |
588 | End: | |
589 | */ |