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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). | |
85ec4feb | 4 | Copyright (C) 1987-2018 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. | |
197 | TYPE_NAME is an IDENTIFIER_NODE for `C', the member class template. */ | |
6615c446 | 198 | DEFTREECODE (UNBOUND_CLASS_TEMPLATE, "unbound_class_template", tcc_type, 0) |
b8c6534b | 199 | |
98ed9dae | 200 | /* A using declaration. USING_DECL_SCOPE contains the specified |
f4da28a0 JM |
201 | scope. In a variadic using-declaration, this is a TYPE_PACK_EXPANSION. |
202 | In a member using decl, unless DECL_DEPENDENT_P is true, | |
98ed9dae NS |
203 | USING_DECL_DECLS contains the _DECL or OVERLOAD so named. This is |
204 | not an alias, but is later expanded into multiple aliases. */ | |
6615c446 | 205 | DEFTREECODE (USING_DECL, "using_decl", tcc_declaration, 0) |
5566b478 | 206 | |
c8094d83 | 207 | /* A using directive. The operand is USING_STMT_NAMESPACE. */ |
11324716 | 208 | DEFTREECODE (USING_STMT, "using_stmt", tcc_statement, 1) |
9da99f7d | 209 | |
01ea1ea8 NS |
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. */ | |
6615c446 | 213 | DEFTREECODE (DEFAULT_ARG, "default_arg", tcc_exceptional, 0) |
42976354 | 214 | |
b15ea309 JM |
215 | /* An uninstantiated/unevaluated noexcept-specification. For the |
216 | uninstantiated case, DEFERRED_NOEXCEPT_PATTERN is the pattern from the | |
217 | template, and DEFERRED_NOEXCEPT_ARGS are the template arguments to | |
218 | substitute into the pattern when needed. For the unevaluated case, | |
219 | those slots are NULL_TREE and we use get_defaulted_eh_spec to find | |
220 | the exception-specification. */ | |
10261728 JM |
221 | DEFTREECODE (DEFERRED_NOEXCEPT, "deferred_noexcept", tcc_exceptional, 0) |
222 | ||
8f032717 | 223 | /* A template-id, like foo<int>. The first operand is the template. |
bf12d54d NS |
224 | The second is NULL if there are no explicit arguments, or a |
225 | TREE_VEC of arguments. The template will be a FUNCTION_DECL, | |
226 | TEMPLATE_DECL, or an OVERLOAD. If the template-id refers to a | |
227 | member template, the template may be an IDENTIFIER_NODE. */ | |
6615c446 | 228 | DEFTREECODE (TEMPLATE_ID_EXPR, "template_id_expr", tcc_expression, 2) |
386b8a85 | 229 | |
5256a7f5 | 230 | /* One of a set of overloaded functions. */ |
6615c446 | 231 | DEFTREECODE (OVERLOAD, "overload", tcc_exceptional, 0) |
2c73f9f5 | 232 | |
9f4faeae MM |
233 | /* A pseudo-destructor, of the form "OBJECT.~DESTRUCTOR" or |
234 | "OBJECT.SCOPE::~DESTRUCTOR. The first operand is the OBJECT. The | |
235 | second operand (if non-NULL) is the SCOPE. The third operand is | |
236 | the TYPE node corresponding to the DESTRUCTOR. The type of the | |
c8094d83 | 237 | first operand will always be a scalar type. |
9f4faeae MM |
238 | |
239 | The type of a PSEUDO_DTOR_EXPR is always "void", even though it can | |
240 | be used as if it were a zero-argument function. We handle the | |
241 | function-call case specially, and giving it "void" type prevents it | |
c8094d83 | 242 | being used in expressions in ways that are not permitted. */ |
9f4faeae MM |
243 | DEFTREECODE (PSEUDO_DTOR_EXPR, "pseudo_dtor_expr", tcc_expression, 3) |
244 | ||
42976354 BK |
245 | /* A whole bunch of tree codes for the initial, superficial parsing of |
246 | templates. */ | |
6615c446 JO |
247 | DEFTREECODE (MODOP_EXPR, "modop_expr", tcc_expression, 3) |
248 | DEFTREECODE (CAST_EXPR, "cast_expr", tcc_unary, 1) | |
249 | DEFTREECODE (REINTERPRET_CAST_EXPR, "reinterpret_cast_expr", tcc_unary, 1) | |
250 | DEFTREECODE (CONST_CAST_EXPR, "const_cast_expr", tcc_unary, 1) | |
251 | DEFTREECODE (STATIC_CAST_EXPR, "static_cast_expr", tcc_unary, 1) | |
252 | DEFTREECODE (DYNAMIC_CAST_EXPR, "dynamic_cast_expr", tcc_unary, 1) | |
a4474a38 | 253 | DEFTREECODE (IMPLICIT_CONV_EXPR, "implicit_conv_expr", tcc_unary, 1) |
6615c446 JO |
254 | DEFTREECODE (DOTSTAR_EXPR, "dotstar_expr", tcc_expression, 2) |
255 | DEFTREECODE (TYPEID_EXPR, "typeid_expr", tcc_expression, 1) | |
0a766368 | 256 | DEFTREECODE (NOEXCEPT_EXPR, "noexcept_expr", tcc_unary, 1) |
0a6969ad | 257 | |
d17811fd MM |
258 | /* A placeholder for an expression that is not type-dependent, but |
259 | does occur in a template. When an expression that is not | |
260 | type-dependent appears in a larger expression, we must compute the | |
261 | type of that larger expression. That computation would normally | |
262 | modify the original expression, which would change the mangling of | |
263 | that expression if it appeared in a template argument list. In | |
264 | that situation, we create a NON_DEPENDENT_EXPR to take the place of | |
018a5803 | 265 | the original expression. The expression is the only operand -- it |
324f9dfb | 266 | is only needed for diagnostics. */ |
6615c446 | 267 | DEFTREECODE (NON_DEPENDENT_EXPR, "non_dependent_expr", tcc_expression, 1) |
d17811fd | 268 | |
ade3dc07 JM |
269 | /* CTOR_INITIALIZER is a placeholder in template code for a call to |
270 | setup_vtbl_pointer (and appears in all functions, not just ctors). */ | |
6615c446 | 271 | DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer", tcc_expression, 1) |
5a508662 | 272 | |
93cfbc5c | 273 | DEFTREECODE (TRY_BLOCK, "try_block", tcc_statement, 2) |
5a508662 | 274 | |
93cfbc5c | 275 | DEFTREECODE (EH_SPEC_BLOCK, "eh_spec_block", tcc_statement, 2) |
5a508662 | 276 | |
1a6025b4 JM |
277 | /* A HANDLER wraps a catch handler for the HANDLER_TYPE. If this is |
278 | CATCH_ALL_TYPE, then the handler catches all types. The declaration of | |
279 | the catch variable is in HANDLER_PARMS, and the body block in | |
280 | HANDLER_BODY. */ | |
93cfbc5c | 281 | DEFTREECODE (HANDLER, "handler", tcc_statement, 2) |
0a6969ad | 282 | |
52a11cbf | 283 | /* A MUST_NOT_THROW_EXPR wraps an expression that may not |
f2162c3d TR |
284 | throw, and must call terminate if it does. The second argument |
285 | is a condition, used in templates to express noexcept (condition). */ | |
286 | DEFTREECODE (MUST_NOT_THROW_EXPR, "must_not_throw_expr", tcc_expression, 2) | |
52a11cbf | 287 | |
5a508662 RH |
288 | /* A CLEANUP_STMT marks the point at which a declaration is fully |
289 | constructed. The CLEANUP_EXPR is run on behalf of CLEANUP_DECL | |
290 | when CLEANUP_BODY completes. */ | |
93cfbc5c | 291 | DEFTREECODE (CLEANUP_STMT, "cleanup_stmt", tcc_statement, 3) |
5a508662 RH |
292 | |
293 | /* Represents an 'if' statement. The operands are IF_COND, | |
545f261b | 294 | THEN_CLAUSE, and ELSE_CLAUSE, and the current scope, respectively. */ |
c8094d83 | 295 | /* ??? It is currently still necessary to distinguish between IF_STMT |
5a508662 | 296 | and COND_EXPR for the benefit of templates. */ |
545f261b | 297 | DEFTREECODE (IF_STMT, "if_stmt", tcc_statement, 4) |
5a508662 | 298 | |
fbc315db ILT |
299 | /* Used to represent a `for' statement. The operands are |
300 | FOR_INIT_STMT, FOR_COND, FOR_EXPR, and FOR_BODY, respectively. */ | |
40e71fc7 | 301 | DEFTREECODE (FOR_STMT, "for_stmt", tcc_statement, 5) |
fbc315db | 302 | |
f9132eb7 | 303 | /* Used to represent a range-based `for' statement. The operands are |
8112667c MP |
304 | RANGE_FOR_DECL, RANGE_FOR_EXPR, RANGE_FOR_BODY, RANGE_FOR_SCOPE, |
305 | RANGE_FOR_UNROLL, and RANGE_FOR_INIT_STMT, respectively. Only used in | |
306 | templates. */ | |
307 | DEFTREECODE (RANGE_FOR_STMT, "range_for_stmt", tcc_statement, 6) | |
f9132eb7 | 308 | |
fbc315db ILT |
309 | /* Used to represent a 'while' statement. The operands are WHILE_COND |
310 | and WHILE_BODY, respectively. */ | |
93cfbc5c | 311 | DEFTREECODE (WHILE_STMT, "while_stmt", tcc_statement, 2) |
fbc315db ILT |
312 | |
313 | /* Used to represent a 'do' statement. The operands are DO_BODY and | |
314 | DO_COND, respectively. */ | |
93cfbc5c | 315 | DEFTREECODE (DO_STMT, "do_stmt", tcc_statement, 2) |
fbc315db ILT |
316 | |
317 | /* Used to represent a 'break' statement. */ | |
93cfbc5c | 318 | DEFTREECODE (BREAK_STMT, "break_stmt", tcc_statement, 0) |
fbc315db ILT |
319 | |
320 | /* Used to represent a 'continue' statement. */ | |
93cfbc5c | 321 | DEFTREECODE (CONTINUE_STMT, "continue_stmt", tcc_statement, 0) |
fbc315db ILT |
322 | |
323 | /* Used to represent a 'switch' statement. The operands are | |
1f18dbc6 NF |
324 | SWITCH_STMT_COND, SWITCH_STMT_BODY, SWITCH_STMT_TYPE, and |
325 | SWITCH_STMT_SCOPE, respectively. */ | |
326 | DEFTREECODE (SWITCH_STMT, "switch_stmt", tcc_statement, 4) | |
fbc315db | 327 | |
934790cc ILT |
328 | /* Used to represent an expression statement. Use `EXPR_STMT_EXPR' to |
329 | obtain the expression. */ | |
330 | DEFTREECODE (EXPR_STMT, "expr_stmt", tcc_expression, 1) | |
331 | ||
6615c446 | 332 | DEFTREECODE (TAG_DEFN, "tag_defn", tcc_expression, 0) |
5ffe581d | 333 | |
42c244d8 | 334 | /* Represents an 'offsetof' expression during template expansion. */ |
905d2812 | 335 | DEFTREECODE (OFFSETOF_EXPR, "offsetof_expr", tcc_expression, 2) |
42c244d8 | 336 | |
be845b04 JJ |
337 | /* Represents an '__builtin_addressof' expression during template |
338 | expansion. This is similar to ADDR_EXPR, but it doesn't invoke | |
339 | overloaded & operators. */ | |
340 | DEFTREECODE (ADDRESSOF_EXPR, "addressof_expr", tcc_expression, 1) | |
341 | ||
03a08664 ILT |
342 | /* Represents the -> operator during template expansion. */ |
343 | DEFTREECODE (ARROW_EXPR, "arrow_expr", tcc_expression, 1) | |
344 | ||
345 | /* Represents an '__alignof__' expression during template | |
346 | expansion. */ | |
0161fcff | 347 | DEFTREECODE (ALIGNOF_EXPR, "alignof_expr", tcc_expression, 1) |
03a08664 | 348 | |
b67bc44c NP |
349 | /* Represents an Objective-C++ '@encode' expression during template |
350 | expansion. */ | |
c154b3d8 | 351 | DEFTREECODE (AT_ENCODE_EXPR, "at_encode_expr", tcc_expression, 1) |
b67bc44c | 352 | |
c3e5898b ILT |
353 | /* A STMT_EXPR represents a statement-expression during template |
354 | expansion. This is the GCC extension { ( ... ) }. The | |
355 | STMT_EXPR_STMT is the statement given by the expression. */ | |
356 | DEFTREECODE (STMT_EXPR, "stmt_expr", tcc_expression, 1) | |
357 | ||
392e3d51 RS |
358 | /* Unary plus. Operand 0 is the expression to which the unary plus |
359 | is applied. */ | |
360 | DEFTREECODE (UNARY_PLUS_EXPR, "unary_plus_expr", tcc_unary, 1) | |
361 | ||
8d0cf15e | 362 | /** C++11 extensions. */ |
55a3debe | 363 | |
8d0cf15e | 364 | /* A static assertion. This is a C++11 extension. |
55a3debe DG |
365 | STATIC_ASSERT_CONDITION contains the condition that is being |
366 | checked. STATIC_ASSERT_MESSAGE contains the message (a string | |
367 | literal) to be displayed if the condition fails to hold. */ | |
368 | DEFTREECODE (STATIC_ASSERT, "static_assert", tcc_exceptional, 0) | |
369 | ||
5d80a306 DG |
370 | /* Represents an argument pack of types (or templates). An argument |
371 | pack stores zero or more arguments that will be used to instantiate | |
372 | a parameter pack. | |
373 | ||
374 | ARGUMENT_PACK_ARGS retrieves the arguments stored in the argument | |
375 | pack. | |
376 | ||
377 | Example: | |
378 | template<typename... Values> | |
379 | class tuple { ... }; | |
380 | ||
381 | tuple<int, float, double> t; | |
382 | ||
383 | Values is a (template) parameter pack. When tuple<int, float, | |
384 | double> is instantiated, the Values parameter pack is instantiated | |
a757b5c5 | 385 | with the argument pack <int, float, double>. ARGUMENT_PACK_ARGS will |
5d80a306 DG |
386 | be a TREE_VEC containing int, float, and double. */ |
387 | DEFTREECODE (TYPE_ARGUMENT_PACK, "type_argument_pack", tcc_type, 0) | |
388 | ||
389 | /* Represents an argument pack of values, which can be used either for | |
390 | non-type template arguments or function call arguments. | |
391 | ||
392 | NONTYPE_ARGUMENT_PACK plays precisely the same role as | |
393 | TYPE_ARGUMENT_PACK, but will be used for packing non-type template | |
394 | arguments (e.g., "int... Dimensions") or function arguments ("const | |
395 | Args&... args"). */ | |
396 | DEFTREECODE (NONTYPE_ARGUMENT_PACK, "nontype_argument_pack", tcc_expression, 1) | |
397 | ||
398 | /* Represents a type expression that will be expanded into a list of | |
399 | types when instantiated with one or more argument packs. | |
400 | ||
401 | PACK_EXPANSION_PATTERN retrieves the expansion pattern. This is | |
402 | the type or expression that we will substitute into with each | |
403 | argument in an argument pack. | |
404 | ||
405 | SET_PACK_EXPANSION_PATTERN sets the expansion pattern. | |
406 | ||
407 | PACK_EXPANSION_PARAMETER_PACKS contains a TREE_LIST of the parameter | |
408 | packs that are used in this pack expansion. | |
409 | ||
410 | Example: | |
411 | template<typename... Values> | |
412 | struct tied : tuple<Values&...> { | |
413 | // ... | |
414 | }; | |
415 | ||
416 | The derivation from tuple contains a TYPE_PACK_EXPANSION for the | |
f96d6fd0 | 417 | template arguments. Its PACK_EXPANSION_PATTERN is "Values&" and its |
5d80a306 DG |
418 | PACK_EXPANSION_PARAMETER_PACKS will contain "Values". */ |
419 | DEFTREECODE (TYPE_PACK_EXPANSION, "type_pack_expansion", tcc_type, 0) | |
420 | ||
421 | /* Represents an expression that will be expanded into a list of | |
422 | expressions when instantiated with one or more argument packs. | |
423 | ||
424 | EXPR_PACK_EXPANSION plays precisely the same role as TYPE_PACK_EXPANSION, | |
425 | but will be used for expressions. */ | |
c67dd256 | 426 | DEFTREECODE (EXPR_PACK_EXPANSION, "expr_pack_expansion", tcc_expression, 3) |
5d80a306 DG |
427 | |
428 | /* Selects the Ith parameter out of an argument pack. This node will | |
429 | be used when instantiating pack expansions; see | |
430 | tsubst_pack_expansion. | |
431 | ||
432 | ARGUMENT_PACK_SELECT_FROM_PACK contains the *_ARGUMENT_PACK node | |
433 | from which the argument will be selected. | |
434 | ||
435 | ARGUMENT_PACK_SELECT_INDEX contains the index into the argument | |
436 | pack that will be returned by this ARGUMENT_PACK_SELECT node. The | |
437 | index is a machine integer. */ | |
438 | DEFTREECODE (ARGUMENT_PACK_SELECT, "argument_pack_select", tcc_exceptional, 0) | |
439 | ||
378b307d AS |
440 | /* Fold expressions allow the expansion of a template argument pack |
441 | over a binary operator. | |
442 | ||
443 | FOLD_EXPR_MOD_P is true when the fold operation is a compound assignment | |
444 | operator. | |
445 | ||
446 | FOLD_EXPR_OP is an INTEGER_CST storing the tree code for the folded | |
447 | expression. Note that when FOLDEXPR_MOD_P is true, the operator is | |
448 | a compound assignment operator for that kind of expression. | |
449 | ||
450 | FOLD_EXPR_PACK is an expression containing an unexpanded parameter pack; | |
451 | when expanded, each term becomes an argument of the folded expression. | |
452 | ||
453 | In a BINARY_FOLD_EXPRESSION, FOLD_EXPR_INIT is the non-pack argument. */ | |
454 | DEFTREECODE (UNARY_LEFT_FOLD_EXPR, "unary_left_fold_expr", tcc_expression, 2) | |
455 | DEFTREECODE (UNARY_RIGHT_FOLD_EXPR, "unary_right_fold_expr", tcc_expression, 2) | |
456 | DEFTREECODE (BINARY_LEFT_FOLD_EXPR, "binary_left_fold_expr", tcc_expression, 3) | |
457 | DEFTREECODE (BINARY_RIGHT_FOLD_EXPR, "binary_right_fold_expr", tcc_expression, 3) | |
458 | ||
459 | ||
cb68ec50 PC |
460 | /** C++ extensions. */ |
461 | ||
462 | /* Represents a trait expression during template expansion. */ | |
463 | DEFTREECODE (TRAIT_EXPR, "trait_expr", tcc_exceptional, 0) | |
464 | ||
d5f4eddd JM |
465 | /* A lambda expression. This is a C++0x extension. |
466 | LAMBDA_EXPR_DEFAULT_CAPTURE_MODE is an enum for the default, which may be | |
467 | none. | |
468 | LAMBDA_EXPR_CAPTURE_LIST holds the capture-list, including `this'. | |
469 | LAMBDA_EXPR_THIS_CAPTURE goes straight to the capture of `this', if it exists. | |
61ca4737 JM |
470 | LAMBDA_EXPR_PENDING_PROXIES is a vector of capture proxies which need to |
471 | be pushed once scope returns to the lambda. | |
9925f216 | 472 | LAMBDA_EXPR_MUTABLE_P signals whether this lambda was declared mutable. */ |
d5f4eddd JM |
473 | DEFTREECODE (LAMBDA_EXPR, "lambda_expr", tcc_exceptional, 0) |
474 | ||
3ad6a8e1 DG |
475 | /* The declared type of an expression. This is a C++0x extension. |
476 | DECLTYPE_TYPE_EXPR is the expression whose type we are computing. | |
477 | DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P states whether the | |
478 | expression was parsed as an id-expression or a member access | |
d5f4eddd JM |
479 | expression. When false, it was parsed as a full expression. |
480 | DECLTYPE_FOR_LAMBDA_CAPTURE is set if we want lambda capture semantics. | |
481 | DECLTYPE_FOR_LAMBDA_RETURN is set if we want lambda return deduction. */ | |
3ad6a8e1 DG |
482 | DEFTREECODE (DECLTYPE_TYPE, "decltype_type", tcc_type, 0) |
483 | ||
a0d260fc PC |
484 | /* A type designated by `__underlying_type (type)'. |
485 | UNDERLYING_TYPE_TYPE is the type in question. */ | |
486 | DEFTREECODE (UNDERLYING_TYPE, "underlying_type", tcc_type, 0) | |
487 | ||
4daba884 BK |
488 | /* A type designated by one of the bases type traits. |
489 | BASES_TYPE is the type in question. */ | |
490 | DEFTREECODE (BASES, "bases", tcc_type, 0) | |
491 | ||
aa373032 DS |
492 | /* Used to represent the template information stored by template |
493 | specializations. | |
494 | The accessors are: | |
495 | TI_TEMPLATE the template declaration associated to the specialization | |
496 | TI_ARGS the arguments of the template specialization | |
497 | TI_TYPEDEFS_NEEDING_ACCESS_CHECKING the vector of typedefs used in | |
498 | the pattern of the template for which access check is needed at template | |
499 | instantiation time. */ | |
500 | DEFTREECODE (TEMPLATE_INFO, "template_info", tcc_exceptional, 0) | |
501 | ||
971e17ff AS |
502 | /* Extensions for Concepts. */ |
503 | ||
504 | /* Used to represent information associated with constrained declarations. */ | |
505 | DEFTREECODE (CONSTRAINT_INFO, "constraint_info", tcc_exceptional, 0) | |
506 | ||
507 | /* A wildcard declaration is a placeholder for a template parameter | |
508 | used to resolve constrained-type-names in concepts. During | |
509 | resolution, the matching argument is saved as the TREE_TYPE | |
510 | of the wildcard. */ | |
511 | DEFTREECODE (WILDCARD_DECL, "wildcard_decl", tcc_declaration, 0) | |
512 | ||
513 | /* A requires-expr is a binary expression. The first operand is | |
514 | its parameter list (possibly NULL). The second is a list of | |
515 | requirements, which are denoted by the _REQ* tree codes | |
516 | below. */ | |
517 | DEFTREECODE (REQUIRES_EXPR, "requires_expr", tcc_expression, 2) | |
518 | ||
519 | /* A requirement for an expression. */ | |
520 | DEFTREECODE (SIMPLE_REQ, "simple_req", tcc_expression, 1) | |
521 | ||
522 | /* A requirement for a type. */ | |
523 | DEFTREECODE (TYPE_REQ, "type_req", tcc_expression, 1) | |
524 | ||
525 | /* A requirement for an expression and its properties. The | |
526 | first operand is the expression, and the 2nd is its type. | |
527 | The accessor COMPOUND_REQ_NOEXCEPT determines whether | |
528 | the noexcept keyword was present. */ | |
529 | DEFTREECODE (COMPOUND_REQ, "compound_req", tcc_expression, 2) | |
530 | ||
531 | /* A requires clause within a requires expression. */ | |
532 | DEFTREECODE (NESTED_REQ, "nested_req", tcc_expression, 1) | |
533 | ||
534 | /* Constraints are modeled as kinds of expressions. | |
535 | The operands of a constraint can be either types or expressions. | |
536 | Unlike expressions, constraints do not have a type. */ | |
537 | ||
538 | /* A predicate constraint evaluates an expression E. | |
539 | ||
540 | PRED_CONSTR_EXPR has the expression to be evaluated. */ | |
541 | DEFTREECODE (PRED_CONSTR, "pred_constr", tcc_expression, 1) | |
542 | ||
f078dc7d AS |
543 | /* A check constraint represents the checking of a concept |
544 | C. It has two operands: the template defining the concept | |
545 | and a sequence of template arguments. | |
546 | ||
547 | CHECK_CONSTR_CONCEPT has the concept definition | |
548 | CHECK_CONSTR_ARGUMENTS are the template arguments */ | |
549 | DEFTREECODE (CHECK_CONSTR, "check_constr", tcc_expression, 2) | |
550 | ||
971e17ff AS |
551 | /* An expression constraint determines the validity of a expression E. |
552 | ||
553 | EXPR_CONST_EXPR has the expression being validated. */ | |
554 | DEFTREECODE (EXPR_CONSTR, "expr_constr", tcc_expression, 1) | |
555 | ||
556 | /* A type constraint determines the validity of a type T. Note that | |
557 | ||
558 | TYPE_CONST_TYPE has the type being validated */ | |
559 | DEFTREECODE (TYPE_CONSTR, "type_constr", tcc_expression, 1) | |
560 | ||
561 | /* An implicit conversion constraint determines if an expression | |
562 | E is implicitly convertible to a type T. Note that T may | |
563 | be dependent but does not contain any placeholders. | |
564 | ||
565 | ICONV_CONSTR_EXPR has the expression E. | |
566 | ICONV_CONSTR_TYPE has the type T. | |
567 | */ | |
568 | DEFTREECODE (ICONV_CONSTR, "iconv_constr", tcc_expression, 2) | |
569 | ||
570 | /* An argument deduction constraint determines if the type of an | |
571 | expression E can be deduced from a type pattern T. Note that | |
572 | T must contain at least one place holder. | |
573 | ||
574 | DEDUCT_CONSTR_EXPR has the expression E | |
f078dc7d | 575 | DEDUCT_CONSTR_PATTERN has the type pattern T. |
971e17ff AS |
576 | DEDUCT_CONSTR_PLACEHOLDERS has the list of placeholder nodes in T. */ |
577 | DEFTREECODE (DEDUCT_CONSTR, "deduct_constr", tcc_expression, 3) | |
578 | ||
579 | /* An exception constraint determines if, for an expression E, | |
580 | noexcept(E) is true. | |
581 | ||
582 | EXCEPT_CONSTR_EXPR has the expression E. */ | |
583 | DEFTREECODE (EXCEPT_CONSTR, "except_constr", tcc_expression, 1) | |
584 | ||
585 | /* A parameterized constraint declares constraint variables, which | |
586 | are used in expression, type, and exception constraints. | |
587 | ||
588 | PARM_CONSTR_PARMS has a TREE_LIST of parameter declarations. | |
589 | PARM_CONSTR_OPERAND has the nested constraint. */ | |
590 | DEFTREECODE (PARM_CONSTR, "parm_constr", tcc_expression, 2) | |
591 | ||
592 | /* The conjunction and disjunction of two constraints, respectively. | |
593 | Operands are accessed using TREE_OPERAND. */ | |
594 | DEFTREECODE (CONJ_CONSTR, "conj_constr", tcc_expression, 2) | |
595 | DEFTREECODE (DISJ_CONSTR, "disj_constr", tcc_expression, 2) | |
596 | ||
597 | ||
f84b4be9 JM |
598 | /* |
599 | Local variables: | |
600 | mode:c | |
601 | End: | |
602 | */ |