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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). | |
c8094d83 | 4 | Copyright (C) 1987, 1988, 1990, 1993, 1997, 1998, 2003, 2004, 2005, |
d652f226 | 5 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2010 |
e77f031d | 6 | Free Software Foundation, Inc. |
8d08fdba MS |
7 | Hacked by Michael Tiemann (tiemann@cygnus.com) |
8 | ||
b599b135 | 9 | This file is part of GCC. |
8d08fdba | 10 | |
b599b135 | 11 | GCC is free software; you can redistribute it and/or modify |
8d08fdba | 12 | it under the terms of the GNU General Public License as published by |
e77f031d | 13 | the Free Software Foundation; either version 3, or (at your option) |
8d08fdba MS |
14 | any later version. |
15 | ||
b599b135 | 16 | GCC is distributed in the hope that it will be useful, |
8d08fdba MS |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
e77f031d NC |
22 | along with GCC; see the file COPYING3. If not see |
23 | <http://www.gnu.org/licenses/>. */ | |
8d08fdba | 24 | |
c8094d83 | 25 | |
4ba126e4 MM |
26 | /* An OFFSET_REF is used in two situations: |
27 | ||
28 | 1. An expression of the form `A::m' where `A' is a class and `m' is | |
d6b4ea85 MM |
29 | a non-static member. In this case, operand 0 will be a TYPE |
30 | (corresponding to `A') and operand 1 will be a FIELD_DECL, | |
31 | BASELINK, or TEMPLATE_ID_EXPR (corresponding to `m'). | |
4ba126e4 MM |
32 | |
33 | The expression is a pointer-to-member if its address is taken, | |
6d05585b MM |
34 | but simply denotes a member of the object if its address is not |
35 | taken. | |
c8094d83 | 36 | |
d6b4ea85 MM |
37 | This form is only used during the parsing phase; once semantic |
38 | analysis has taken place they are eliminated. | |
4ba126e4 MM |
39 | |
40 | 2. An expression of the form `x.*p'. In this case, operand 0 will | |
41 | be an expression corresponding to `x' and operand 1 will be an | |
d6b4ea85 | 42 | expression with pointer-to-member type. */ |
6615c446 | 43 | DEFTREECODE (OFFSET_REF, "offset_ref", tcc_reference, 2) |
8d08fdba | 44 | |
61a127b3 MM |
45 | /* A pointer-to-member constant. For a pointer-to-member constant |
46 | `X::Y' The PTRMEM_CST_CLASS is the RECORD_TYPE for `X' and the | |
47 | PTRMEM_CST_MEMBER is the _DECL for `Y'. */ | |
6615c446 | 48 | DEFTREECODE (PTRMEM_CST, "ptrmem_cst", tcc_constant, 0) |
61a127b3 | 49 | |
02531345 JM |
50 | /* For NEW_EXPR, operand 0 is the placement list. |
51 | Operand 1 is the new-declarator. | |
058b15c1 MM |
52 | Operand 2 is the number of elements in the array. |
53 | Operand 3 is the initializer. */ | |
6615c446 JO |
54 | DEFTREECODE (NEW_EXPR, "nw_expr", tcc_expression, 4) |
55 | DEFTREECODE (VEC_NEW_EXPR, "vec_nw_expr", tcc_expression, 3) | |
02531345 | 56 | |
8d08fdba MS |
57 | /* For DELETE_EXPR, operand 0 is the store to be destroyed. |
58 | Operand 1 is the value to pass to the destroying function | |
59 | saying whether the store should be deallocated as well. */ | |
6615c446 JO |
60 | DEFTREECODE (DELETE_EXPR, "dl_expr", tcc_expression, 2) |
61 | DEFTREECODE (VEC_DELETE_EXPR, "vec_dl_expr", tcc_expression, 2) | |
8d08fdba MS |
62 | |
63 | /* Value is reference to particular overloaded class method. | |
c8a209ca | 64 | Operand 0 is the class, operand 1 is the field |
8d08fdba | 65 | The COMPLEXITY field holds the class level (usually 0). */ |
6615c446 | 66 | DEFTREECODE (SCOPE_REF, "scope_ref", tcc_reference, 2) |
8d08fdba MS |
67 | |
68 | /* When composing an object with a member, this is the result. | |
69 | Operand 0 is the object. Operand 1 is the member (usually | |
70 | a dereferenced pointer to member). */ | |
6615c446 | 71 | DEFTREECODE (MEMBER_REF, "member_ref", tcc_reference, 2) |
8d08fdba MS |
72 | |
73 | /* Type conversion operator in C++. TREE_TYPE is type that this | |
74 | operator converts to. Operand is expression to be converted. */ | |
6615c446 | 75 | DEFTREECODE (TYPE_EXPR, "type_expr", tcc_expression, 1) |
8d08fdba | 76 | |
5039610b SL |
77 | /* AGGR_INIT_EXPRs have a variably-sized representation similar to |
78 | that of CALL_EXPRs. Operand 0 is an INTEGER_CST node containing the | |
79 | operand count, operand 1 is the function which performs initialization, | |
80 | operand 2 is the slot which was allocated for this expression, and | |
81 | the remaining operands are the arguments to the initialization function. */ | |
82 | DEFTREECODE (AGGR_INIT_EXPR, "aggr_init_expr", tcc_vl_exp, 3) | |
8d08fdba | 83 | |
d5f4eddd JM |
84 | /* Initialization of an array from another array, expressed at a high level |
85 | so that it works with TARGET_EXPR. Operand 0 is the target, operand 1 | |
86 | is the initializer. */ | |
87 | DEFTREECODE (VEC_INIT_EXPR, "vec_init_expr", tcc_expression, 2) | |
88 | ||
8d2733ca MS |
89 | /* A throw expression. operand 0 is the expression, if there was one, |
90 | else it is NULL_TREE. */ | |
6615c446 | 91 | DEFTREECODE (THROW_EXPR, "throw_expr", tcc_expression, 1) |
8d08fdba | 92 | |
699ed0ce MM |
93 | /* An empty class object. The TREE_TYPE gives the class type. We use |
94 | these to avoid actually creating instances of the empty classes. */ | |
6615c446 | 95 | DEFTREECODE (EMPTY_CLASS_EXPR, "empty_class_expr", tcc_expression, 0) |
699ed0ce | 96 | |
50ad9642 MM |
97 | /* A reference to a member function or member functions from a base |
98 | class. BASELINK_FUNCTIONS gives the FUNCTION_DECL, | |
99 | TEMPLATE_DECL, OVERLOAD, or TEMPLATE_ID_EXPR corresponding to the | |
100 | functions. BASELINK_BINFO gives the base from which the functions | |
101 | come, i.e., the base to which the `this' pointer must be converted | |
102 | before the functions are called. BASELINK_ACCESS_BINFO gives the | |
c8094d83 | 103 | base used to name the functions. |
50ad9642 MM |
104 | |
105 | A BASELINK is an expression; the TREE_TYPE of the BASELINK gives | |
106 | the type of the expression. This type is either a FUNCTION_TYPE, | |
107 | METHOD_TYPE, or `unknown_type_node' indicating that the function is | |
324f9dfb | 108 | overloaded. */ |
6615c446 | 109 | DEFTREECODE (BASELINK, "baselink", tcc_exceptional, 0) |
50ad9642 | 110 | |
8d08fdba MS |
111 | /* Template definition. The following fields have the specified uses, |
112 | although there are other macros in cp-tree.h that should be used for | |
113 | accessing this data. | |
0cbd7506 MS |
114 | DECL_ARGUMENTS template parm vector |
115 | DECL_TEMPLATE_INFO template text &c | |
8d08fdba MS |
116 | DECL_VINDEX list of instantiations already produced; |
117 | only done for functions so far | |
118 | For class template: | |
0cbd7506 MS |
119 | DECL_INITIAL associated templates (methods &c) |
120 | DECL_TEMPLATE_RESULT null | |
8d08fdba MS |
121 | For non-class templates: |
122 | TREE_TYPE type of object to be constructed | |
0cbd7506 MS |
123 | DECL_TEMPLATE_RESULT decl for object to be created |
124 | (e.g., FUNCTION_DECL with tmpl parms used) | |
8d08fdba | 125 | */ |
6615c446 | 126 | DEFTREECODE (TEMPLATE_DECL, "template_decl", tcc_declaration, 0) |
8d08fdba | 127 | |
f84b4be9 JM |
128 | /* Index into a template parameter list. The TEMPLATE_PARM_IDX gives |
129 | the index (from 0) of the parameter, while the TEMPLATE_PARM_LEVEL | |
130 | gives the level (from 1) of the parameter. | |
131 | ||
132 | Here's an example: | |
c8094d83 | 133 | |
f84b4be9 JM |
134 | template <class T> // Index 0, Level 1. |
135 | struct S | |
136 | { | |
137 | template <class U, // Index 0, Level 2. | |
0cbd7506 | 138 | class V> // Index 1, Level 2. |
f84b4be9 | 139 | void f(); |
c8094d83 | 140 | }; |
f84b4be9 JM |
141 | |
142 | The DESCENDANTS will be a chain of TEMPLATE_PARM_INDEXs descended | |
143 | from this one. The first descendant will have the same IDX, but | |
144 | its LEVEL will be one less. The TREE_CHAIN field is used to chain | |
145 | together the descendants. The TEMPLATE_PARM_DECL is the | |
146 | declaration of this parameter, either a TYPE_DECL or CONST_DECL. | |
147 | The TEMPLATE_PARM_ORIG_LEVEL is the LEVEL of the most distant | |
148 | parent, i.e., the LEVEL that the parameter originally had when it | |
149 | was declared. For example, if we instantiate S<int>, we will have: | |
150 | ||
151 | struct S<int> | |
152 | { | |
153 | template <class U, // Index 0, Level 1, Orig Level 2 | |
0cbd7506 | 154 | class V> // Index 1, Level 1, Orig Level 2 |
f84b4be9 JM |
155 | void f(); |
156 | }; | |
c8094d83 | 157 | |
f84b4be9 JM |
158 | The LEVEL is the level of the parameter when we are worrying about |
159 | the types of things; the ORIG_LEVEL is the level when we are | |
160 | worrying about instantiating things. */ | |
6615c446 | 161 | DEFTREECODE (TEMPLATE_PARM_INDEX, "template_parm_index", tcc_exceptional, 0) |
f84b4be9 | 162 | |
1899c3a4 | 163 | /* Index into a template parameter list for template template parameters. |
c8094d83 | 164 | This parameter must be a type. The TYPE_FIELDS value will be a |
1899c3a4 KL |
165 | TEMPLATE_PARM_INDEX. |
166 | ||
c8094d83 | 167 | It is used without template arguments like TT in C<TT>, |
1899c3a4 | 168 | TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO is NULL_TREE |
a1281f45 | 169 | and TYPE_NAME is a TEMPLATE_DECL. */ |
6615c446 | 170 | DEFTREECODE (TEMPLATE_TEMPLATE_PARM, "template_template_parm", tcc_type, 0) |
1899c3a4 | 171 | |
38b3627d NS |
172 | /* The ordering of the following codes is optimized for the checking |
173 | macros in tree.h. Changing the order will degrade the speed of the | |
174 | compiler. TEMPLATE_TYPE_PARM, TYPENAME_TYPE, TYPEOF_TYPE, | |
175 | BOUND_TEMPLATE_TEMPLATE_PARM. */ | |
c8094d83 | 176 | |
38b3627d | 177 | /* Index into a template parameter list. This parameter must be a type. |
438d94ed | 178 | The type.values field will be a TEMPLATE_PARM_INDEX. */ |
38b3627d | 179 | DEFTREECODE (TEMPLATE_TYPE_PARM, "template_type_parm", tcc_type, 0) |
73b0fce8 | 180 | |
45869a6c | 181 | /* A type designated by `typename T::t'. TYPE_CONTEXT is `T', |
78638e24 MM |
182 | TYPE_NAME is an IDENTIFIER_NODE for `t'. If the type was named via |
183 | template-id, TYPENAME_TYPE_FULLNAME will hold the TEMPLATE_ID_EXPR. | |
fc6a28d7 | 184 | TREE_TYPE is always NULL. */ |
6615c446 | 185 | DEFTREECODE (TYPENAME_TYPE, "typename_type", tcc_type, 0) |
5566b478 | 186 | |
38b3627d NS |
187 | /* A type designated by `__typeof (expr)'. TYPEOF_TYPE_EXPR is the |
188 | expression in question. */ | |
189 | DEFTREECODE (TYPEOF_TYPE, "typeof_type", tcc_type, 0) | |
190 | ||
c8094d83 | 191 | /* Like TEMPLATE_TEMPLATE_PARM it is used with bound template arguments |
38b3627d NS |
192 | like TT<int>. |
193 | In this case, TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO contains the | |
194 | template name and its bound arguments. TYPE_NAME is a TYPE_DECL. */ | |
195 | DEFTREECODE (BOUND_TEMPLATE_TEMPLATE_PARM, "bound_template_template_parm", | |
196 | tcc_type, 0) | |
197 | ||
b8c6534b KL |
198 | /* For template template argument of the form `T::template C'. |
199 | TYPE_CONTEXT is `T', the template parameter dependent object. | |
200 | TYPE_NAME is an IDENTIFIER_NODE for `C', the member class template. */ | |
6615c446 | 201 | DEFTREECODE (UNBOUND_CLASS_TEMPLATE, "unbound_class_template", tcc_type, 0) |
b8c6534b | 202 | |
98ed9dae NS |
203 | /* A using declaration. USING_DECL_SCOPE contains the specified |
204 | scope. In a member using decl, unless DECL_DEPENDENT_P is true, | |
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. */ |
93cfbc5c | 210 | DEFTREECODE (USING_STMT, "using_directive", tcc_statement, 1) |
9da99f7d | 211 | |
01ea1ea8 NS |
212 | /* An un-parsed default argument. Holds a vector of input tokens and |
213 | a vector of places where the argument was instantiated before | |
214 | parsing had occurred. */ | |
6615c446 | 215 | DEFTREECODE (DEFAULT_ARG, "default_arg", tcc_exceptional, 0) |
42976354 | 216 | |
8f032717 | 217 | /* A template-id, like foo<int>. The first operand is the template. |
bf12d54d NS |
218 | The second is NULL if there are no explicit arguments, or a |
219 | TREE_VEC of arguments. The template will be a FUNCTION_DECL, | |
220 | TEMPLATE_DECL, or an OVERLOAD. If the template-id refers to a | |
221 | member template, the template may be an IDENTIFIER_NODE. */ | |
6615c446 | 222 | DEFTREECODE (TEMPLATE_ID_EXPR, "template_id_expr", tcc_expression, 2) |
386b8a85 | 223 | |
c8094d83 | 224 | /* A list-like node for chaining overloading candidates. TREE_TYPE is |
2c73f9f5 | 225 | the original name, and the parameter is the FUNCTION_DECL. */ |
6615c446 | 226 | DEFTREECODE (OVERLOAD, "overload", tcc_exceptional, 0) |
2c73f9f5 | 227 | |
9f4faeae MM |
228 | /* A pseudo-destructor, of the form "OBJECT.~DESTRUCTOR" or |
229 | "OBJECT.SCOPE::~DESTRUCTOR. The first operand is the OBJECT. The | |
230 | second operand (if non-NULL) is the SCOPE. The third operand is | |
231 | the TYPE node corresponding to the DESTRUCTOR. The type of the | |
c8094d83 | 232 | first operand will always be a scalar type. |
9f4faeae MM |
233 | |
234 | The type of a PSEUDO_DTOR_EXPR is always "void", even though it can | |
235 | be used as if it were a zero-argument function. We handle the | |
236 | function-call case specially, and giving it "void" type prevents it | |
c8094d83 | 237 | being used in expressions in ways that are not permitted. */ |
9f4faeae MM |
238 | DEFTREECODE (PSEUDO_DTOR_EXPR, "pseudo_dtor_expr", tcc_expression, 3) |
239 | ||
42976354 BK |
240 | /* A whole bunch of tree codes for the initial, superficial parsing of |
241 | templates. */ | |
6615c446 JO |
242 | DEFTREECODE (MODOP_EXPR, "modop_expr", tcc_expression, 3) |
243 | DEFTREECODE (CAST_EXPR, "cast_expr", tcc_unary, 1) | |
244 | DEFTREECODE (REINTERPRET_CAST_EXPR, "reinterpret_cast_expr", tcc_unary, 1) | |
245 | DEFTREECODE (CONST_CAST_EXPR, "const_cast_expr", tcc_unary, 1) | |
246 | DEFTREECODE (STATIC_CAST_EXPR, "static_cast_expr", tcc_unary, 1) | |
247 | DEFTREECODE (DYNAMIC_CAST_EXPR, "dynamic_cast_expr", tcc_unary, 1) | |
248 | DEFTREECODE (DOTSTAR_EXPR, "dotstar_expr", tcc_expression, 2) | |
249 | DEFTREECODE (TYPEID_EXPR, "typeid_expr", tcc_expression, 1) | |
0a766368 | 250 | DEFTREECODE (NOEXCEPT_EXPR, "noexcept_expr", tcc_unary, 1) |
0a6969ad | 251 | |
d17811fd MM |
252 | /* A placeholder for an expression that is not type-dependent, but |
253 | does occur in a template. When an expression that is not | |
254 | type-dependent appears in a larger expression, we must compute the | |
255 | type of that larger expression. That computation would normally | |
256 | modify the original expression, which would change the mangling of | |
257 | that expression if it appeared in a template argument list. In | |
258 | that situation, we create a NON_DEPENDENT_EXPR to take the place of | |
018a5803 | 259 | the original expression. The expression is the only operand -- it |
324f9dfb | 260 | is only needed for diagnostics. */ |
6615c446 | 261 | DEFTREECODE (NON_DEPENDENT_EXPR, "non_dependent_expr", tcc_expression, 1) |
d17811fd | 262 | |
ade3dc07 JM |
263 | /* CTOR_INITIALIZER is a placeholder in template code for a call to |
264 | setup_vtbl_pointer (and appears in all functions, not just ctors). */ | |
6615c446 | 265 | DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer", tcc_expression, 1) |
5a508662 | 266 | |
93cfbc5c | 267 | DEFTREECODE (TRY_BLOCK, "try_block", tcc_statement, 2) |
5a508662 | 268 | |
93cfbc5c | 269 | DEFTREECODE (EH_SPEC_BLOCK, "eh_spec_block", tcc_statement, 2) |
5a508662 | 270 | |
1a6025b4 JM |
271 | /* A HANDLER wraps a catch handler for the HANDLER_TYPE. If this is |
272 | CATCH_ALL_TYPE, then the handler catches all types. The declaration of | |
273 | the catch variable is in HANDLER_PARMS, and the body block in | |
274 | HANDLER_BODY. */ | |
93cfbc5c | 275 | DEFTREECODE (HANDLER, "handler", tcc_statement, 2) |
0a6969ad | 276 | |
52a11cbf RH |
277 | /* A MUST_NOT_THROW_EXPR wraps an expression that may not |
278 | throw, and must call terminate if it does. */ | |
6615c446 | 279 | DEFTREECODE (MUST_NOT_THROW_EXPR, "must_not_throw_expr", tcc_expression, 1) |
52a11cbf | 280 | |
5a508662 RH |
281 | /* A CLEANUP_STMT marks the point at which a declaration is fully |
282 | constructed. The CLEANUP_EXPR is run on behalf of CLEANUP_DECL | |
283 | when CLEANUP_BODY completes. */ | |
93cfbc5c | 284 | DEFTREECODE (CLEANUP_STMT, "cleanup_stmt", tcc_statement, 3) |
5a508662 RH |
285 | |
286 | /* Represents an 'if' statement. The operands are IF_COND, | |
287 | THEN_CLAUSE, and ELSE_CLAUSE, respectively. */ | |
c8094d83 | 288 | /* ??? It is currently still necessary to distinguish between IF_STMT |
5a508662 | 289 | and COND_EXPR for the benefit of templates. */ |
93cfbc5c | 290 | DEFTREECODE (IF_STMT, "if_stmt", tcc_statement, 3) |
5a508662 | 291 | |
fbc315db ILT |
292 | /* Used to represent a `for' statement. The operands are |
293 | FOR_INIT_STMT, FOR_COND, FOR_EXPR, and FOR_BODY, respectively. */ | |
40e71fc7 | 294 | DEFTREECODE (FOR_STMT, "for_stmt", tcc_statement, 5) |
fbc315db | 295 | |
f9132eb7 | 296 | /* Used to represent a range-based `for' statement. The operands are |
40e71fc7 NF |
297 | RANGE_FOR_DECL, RANGE_FOR_EXPR, RANGE_FOR_BODY, and RANGE_FOR_SCOPE, |
298 | respectively. Only used in templates. */ | |
299 | DEFTREECODE (RANGE_FOR_STMT, "range_for_stmt", tcc_statement, 4) | |
f9132eb7 | 300 | |
fbc315db ILT |
301 | /* Used to represent a 'while' statement. The operands are WHILE_COND |
302 | and WHILE_BODY, respectively. */ | |
93cfbc5c | 303 | DEFTREECODE (WHILE_STMT, "while_stmt", tcc_statement, 2) |
fbc315db ILT |
304 | |
305 | /* Used to represent a 'do' statement. The operands are DO_BODY and | |
306 | DO_COND, respectively. */ | |
93cfbc5c | 307 | DEFTREECODE (DO_STMT, "do_stmt", tcc_statement, 2) |
fbc315db ILT |
308 | |
309 | /* Used to represent a 'break' statement. */ | |
93cfbc5c | 310 | DEFTREECODE (BREAK_STMT, "break_stmt", tcc_statement, 0) |
fbc315db ILT |
311 | |
312 | /* Used to represent a 'continue' statement. */ | |
93cfbc5c | 313 | DEFTREECODE (CONTINUE_STMT, "continue_stmt", tcc_statement, 0) |
fbc315db ILT |
314 | |
315 | /* Used to represent a 'switch' statement. The operands are | |
316 | SWITCH_STMT_COND, SWITCH_STMT_BODY and SWITCH_STMT_TYPE, respectively. */ | |
93cfbc5c | 317 | DEFTREECODE (SWITCH_STMT, "switch_stmt", tcc_statement, 3) |
fbc315db | 318 | |
934790cc ILT |
319 | /* Used to represent an expression statement. Use `EXPR_STMT_EXPR' to |
320 | obtain the expression. */ | |
321 | DEFTREECODE (EXPR_STMT, "expr_stmt", tcc_expression, 1) | |
322 | ||
6615c446 | 323 | DEFTREECODE (TAG_DEFN, "tag_defn", tcc_expression, 0) |
5ffe581d | 324 | |
42c244d8 | 325 | /* Represents an 'offsetof' expression during template expansion. */ |
6615c446 | 326 | DEFTREECODE (OFFSETOF_EXPR, "offsetof_expr", tcc_expression, 1) |
42c244d8 | 327 | |
03a08664 | 328 | /* Represents a 'sizeof' expression during template expansion. */ |
0161fcff | 329 | DEFTREECODE (SIZEOF_EXPR, "sizeof_expr", tcc_expression, 1) |
03a08664 ILT |
330 | |
331 | /* Represents the -> operator during template expansion. */ | |
332 | DEFTREECODE (ARROW_EXPR, "arrow_expr", tcc_expression, 1) | |
333 | ||
334 | /* Represents an '__alignof__' expression during template | |
335 | expansion. */ | |
0161fcff | 336 | DEFTREECODE (ALIGNOF_EXPR, "alignof_expr", tcc_expression, 1) |
03a08664 | 337 | |
b67bc44c NP |
338 | /* Represents an Objective-C++ '@encode' expression during template |
339 | expansion. */ | |
c154b3d8 | 340 | DEFTREECODE (AT_ENCODE_EXPR, "at_encode_expr", tcc_expression, 1) |
b67bc44c | 341 | |
c3e5898b ILT |
342 | /* A STMT_EXPR represents a statement-expression during template |
343 | expansion. This is the GCC extension { ( ... ) }. The | |
344 | STMT_EXPR_STMT is the statement given by the expression. */ | |
345 | DEFTREECODE (STMT_EXPR, "stmt_expr", tcc_expression, 1) | |
346 | ||
392e3d51 RS |
347 | /* Unary plus. Operand 0 is the expression to which the unary plus |
348 | is applied. */ | |
349 | DEFTREECODE (UNARY_PLUS_EXPR, "unary_plus_expr", tcc_unary, 1) | |
350 | ||
55a3debe DG |
351 | /** C++0x extensions. */ |
352 | ||
353 | /* A static assertion. This is a C++0x extension. | |
354 | STATIC_ASSERT_CONDITION contains the condition that is being | |
355 | checked. STATIC_ASSERT_MESSAGE contains the message (a string | |
356 | literal) to be displayed if the condition fails to hold. */ | |
357 | DEFTREECODE (STATIC_ASSERT, "static_assert", tcc_exceptional, 0) | |
358 | ||
5d80a306 DG |
359 | /* Represents an argument pack of types (or templates). An argument |
360 | pack stores zero or more arguments that will be used to instantiate | |
361 | a parameter pack. | |
362 | ||
363 | ARGUMENT_PACK_ARGS retrieves the arguments stored in the argument | |
364 | pack. | |
365 | ||
366 | Example: | |
367 | template<typename... Values> | |
368 | class tuple { ... }; | |
369 | ||
370 | tuple<int, float, double> t; | |
371 | ||
372 | Values is a (template) parameter pack. When tuple<int, float, | |
373 | double> is instantiated, the Values parameter pack is instantiated | |
a757b5c5 | 374 | with the argument pack <int, float, double>. ARGUMENT_PACK_ARGS will |
5d80a306 DG |
375 | be a TREE_VEC containing int, float, and double. */ |
376 | DEFTREECODE (TYPE_ARGUMENT_PACK, "type_argument_pack", tcc_type, 0) | |
377 | ||
378 | /* Represents an argument pack of values, which can be used either for | |
379 | non-type template arguments or function call arguments. | |
380 | ||
381 | NONTYPE_ARGUMENT_PACK plays precisely the same role as | |
382 | TYPE_ARGUMENT_PACK, but will be used for packing non-type template | |
383 | arguments (e.g., "int... Dimensions") or function arguments ("const | |
384 | Args&... args"). */ | |
385 | DEFTREECODE (NONTYPE_ARGUMENT_PACK, "nontype_argument_pack", tcc_expression, 1) | |
386 | ||
387 | /* Represents a type expression that will be expanded into a list of | |
388 | types when instantiated with one or more argument packs. | |
389 | ||
390 | PACK_EXPANSION_PATTERN retrieves the expansion pattern. This is | |
391 | the type or expression that we will substitute into with each | |
392 | argument in an argument pack. | |
393 | ||
394 | SET_PACK_EXPANSION_PATTERN sets the expansion pattern. | |
395 | ||
396 | PACK_EXPANSION_PARAMETER_PACKS contains a TREE_LIST of the parameter | |
397 | packs that are used in this pack expansion. | |
398 | ||
399 | Example: | |
400 | template<typename... Values> | |
401 | struct tied : tuple<Values&...> { | |
402 | // ... | |
403 | }; | |
404 | ||
405 | The derivation from tuple contains a TYPE_PACK_EXPANSION for the | |
f96d6fd0 | 406 | template arguments. Its PACK_EXPANSION_PATTERN is "Values&" and its |
5d80a306 DG |
407 | PACK_EXPANSION_PARAMETER_PACKS will contain "Values". */ |
408 | DEFTREECODE (TYPE_PACK_EXPANSION, "type_pack_expansion", tcc_type, 0) | |
409 | ||
410 | /* Represents an expression that will be expanded into a list of | |
411 | expressions when instantiated with one or more argument packs. | |
412 | ||
413 | EXPR_PACK_EXPANSION plays precisely the same role as TYPE_PACK_EXPANSION, | |
414 | but will be used for expressions. */ | |
415 | DEFTREECODE (EXPR_PACK_EXPANSION, "expr_pack_expansion", tcc_expression, 1) | |
416 | ||
417 | /* Selects the Ith parameter out of an argument pack. This node will | |
418 | be used when instantiating pack expansions; see | |
419 | tsubst_pack_expansion. | |
420 | ||
421 | ARGUMENT_PACK_SELECT_FROM_PACK contains the *_ARGUMENT_PACK node | |
422 | from which the argument will be selected. | |
423 | ||
424 | ARGUMENT_PACK_SELECT_INDEX contains the index into the argument | |
425 | pack that will be returned by this ARGUMENT_PACK_SELECT node. The | |
426 | index is a machine integer. */ | |
427 | DEFTREECODE (ARGUMENT_PACK_SELECT, "argument_pack_select", tcc_exceptional, 0) | |
428 | ||
cb68ec50 PC |
429 | /** C++ extensions. */ |
430 | ||
431 | /* Represents a trait expression during template expansion. */ | |
432 | DEFTREECODE (TRAIT_EXPR, "trait_expr", tcc_exceptional, 0) | |
433 | ||
d5f4eddd JM |
434 | /* A lambda expression. This is a C++0x extension. |
435 | LAMBDA_EXPR_DEFAULT_CAPTURE_MODE is an enum for the default, which may be | |
436 | none. | |
437 | LAMBDA_EXPR_CAPTURE_LIST holds the capture-list, including `this'. | |
438 | LAMBDA_EXPR_THIS_CAPTURE goes straight to the capture of `this', if it exists. | |
439 | LAMBDA_EXPR_MUTABLE_P signals whether this lambda was declared mutable. | |
440 | LAMBDA_EXPR_RETURN_TYPE holds the return type, if it was specified. */ | |
441 | DEFTREECODE (LAMBDA_EXPR, "lambda_expr", tcc_exceptional, 0) | |
442 | ||
3ad6a8e1 DG |
443 | /* The declared type of an expression. This is a C++0x extension. |
444 | DECLTYPE_TYPE_EXPR is the expression whose type we are computing. | |
445 | DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P states whether the | |
446 | expression was parsed as an id-expression or a member access | |
d5f4eddd JM |
447 | expression. When false, it was parsed as a full expression. |
448 | DECLTYPE_FOR_LAMBDA_CAPTURE is set if we want lambda capture semantics. | |
449 | DECLTYPE_FOR_LAMBDA_RETURN is set if we want lambda return deduction. */ | |
3ad6a8e1 DG |
450 | DEFTREECODE (DECLTYPE_TYPE, "decltype_type", tcc_type, 0) |
451 | ||
aa373032 DS |
452 | /* Used to represent the template information stored by template |
453 | specializations. | |
454 | The accessors are: | |
455 | TI_TEMPLATE the template declaration associated to the specialization | |
456 | TI_ARGS the arguments of the template specialization | |
457 | TI_TYPEDEFS_NEEDING_ACCESS_CHECKING the vector of typedefs used in | |
458 | the pattern of the template for which access check is needed at template | |
459 | instantiation time. */ | |
460 | DEFTREECODE (TEMPLATE_INFO, "template_info", tcc_exceptional, 0) | |
461 | ||
f84b4be9 JM |
462 | /* |
463 | Local variables: | |
464 | mode:c | |
465 | End: | |
466 | */ |