1 /* This file contains the definitions and documentation for the
2 additional tree codes used in the GNU C++ compiler (see tree.def
3 for the standard codes).
4 Copyright (C) 1987, 1988, 1990, 1993, 1997, 1998 Free Software Foundation, Inc.
5 Hacked by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GNU CC.
9 GNU CC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GNU CC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GNU CC; see the file COPYING. If not, write to
21 the Free Software Foundation, 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
25 /* Reference to the contents of an offset
26 (a value whose type is an OFFSET_TYPE).
27 Operand 0 is the object within which the offset is taken.
28 Operand 1 is the offset. The language independent OFFSET_REF
29 just won't work for us. */
30 DEFTREECODE (OFFSET_REF, "offset_ref", 'r', 2)
32 /* A pointer-to-member constant. For a pointer-to-member constant
33 `X::Y' The PTRMEM_CST_CLASS is the RECORD_TYPE for `X' and the
34 PTRMEM_CST_MEMBER is the _DECL for `Y'. */
35 DEFTREECODE (PTRMEM_CST, "ptrmem_cst", 'c', 2)
37 /* For NEW_EXPR, operand 0 is the placement list.
38 Operand 1 is the new-declarator.
39 Operand 2 is the initializer. */
40 DEFTREECODE (NEW_EXPR, "nw_expr", 'e', 3)
41 DEFTREECODE (VEC_NEW_EXPR, "vec_nw_expr", 'e', 3)
43 /* For DELETE_EXPR, operand 0 is the store to be destroyed.
44 Operand 1 is the value to pass to the destroying function
45 saying whether the store should be deallocated as well. */
46 DEFTREECODE (DELETE_EXPR, "dl_expr", 'e', 2)
47 DEFTREECODE (VEC_DELETE_EXPR, "vec_dl_expr", 'e', 2)
49 /* Value is reference to particular overloaded class method.
50 Operand 0 is the class name (an IDENTIFIER_NODE);
51 operand 1 is the field (also an IDENTIFIER_NODE).
52 The COMPLEXITY field holds the class level (usually 0). */
53 DEFTREECODE (SCOPE_REF, "scope_ref", 'r', 2)
55 /* When composing an object with a member, this is the result.
56 Operand 0 is the object. Operand 1 is the member (usually
57 a dereferenced pointer to member). */
58 DEFTREECODE (MEMBER_REF, "member_ref", 'r', 2)
60 /* Type conversion operator in C++. TREE_TYPE is type that this
61 operator converts to. Operand is expression to be converted. */
62 DEFTREECODE (TYPE_EXPR, "type_expr", 'e', 1)
64 /* For AGGR_INIT_EXPR, operand 0 is function which performs initialization,
65 operand 1 is argument list to initialization function,
66 and operand 2 is the slot which was allocated for this expression. */
67 DEFTREECODE (AGGR_INIT_EXPR, "aggr_init_expr", 'e', 3)
69 /* A throw expression. operand 0 is the expression, if there was one,
70 else it is NULL_TREE. */
71 DEFTREECODE (THROW_EXPR, "throw_expr", 'e', 1)
73 /* Initialization of a vector, used in build_new. Operand 0 is the target
74 of the initialization, operand 1 is the initializer, and operand 2 is
75 the number of elements. */
76 DEFTREECODE (VEC_INIT_EXPR, "vec_init_expr", 'e', 3)
78 /* Template definition. The following fields have the specified uses,
79 although there are other macros in cp-tree.h that should be used for
81 DECL_ARGUMENTS template parm vector
82 DECL_TEMPLATE_INFO template text &c
83 DECL_VINDEX list of instantiations already produced;
84 only done for functions so far
86 DECL_INITIAL associated templates (methods &c)
88 For non-class templates:
89 TREE_TYPE type of object to be constructed
90 DECL_RESULT decl for object to be created
91 (e.g., FUNCTION_DECL with tmpl parms used)
93 DEFTREECODE (TEMPLATE_DECL, "template_decl", 'd', 0)
95 /* Index into a template parameter list. The TEMPLATE_PARM_IDX gives
96 the index (from 0) of the parameter, while the TEMPLATE_PARM_LEVEL
97 gives the level (from 1) of the parameter.
101 template <class T> // Index 0, Level 1.
104 template <class U, // Index 0, Level 2.
105 class V> // Index 1, Level 2.
109 The DESCENDANTS will be a chain of TEMPLATE_PARM_INDEXs descended
110 from this one. The first descendant will have the same IDX, but
111 its LEVEL will be one less. The TREE_CHAIN field is used to chain
112 together the descendants. The TEMPLATE_PARM_DECL is the
113 declaration of this parameter, either a TYPE_DECL or CONST_DECL.
114 The TEMPLATE_PARM_ORIG_LEVEL is the LEVEL of the most distant
115 parent, i.e., the LEVEL that the parameter originally had when it
116 was declared. For example, if we instantiate S<int>, we will have:
120 template <class U, // Index 0, Level 1, Orig Level 2
121 class V> // Index 1, Level 1, Orig Level 2
125 The LEVEL is the level of the parameter when we are worrying about
126 the types of things; the ORIG_LEVEL is the level when we are
127 worrying about instantiating things. */
128 DEFTREECODE (TEMPLATE_PARM_INDEX, "template_parm_index", 'x',
129 /* The addition of (sizeof(char*) - 1) in the next
130 expression is to ensure against the case where
131 sizeof(char*) does not evenly divide
132 sizeof(HOST_WIDE_INT). */
133 1 + ((3 * sizeof (HOST_WIDE_INT) + sizeof(char*) - 1)
136 /* Index into a template parameter list. This parameter must be a type.
137 The TYPE_FIELDS value will be a TEMPLATE_PARM_INDEX. */
138 DEFTREECODE (TEMPLATE_TYPE_PARM, "template_type_parm", 't', 0)
140 /* Index into a template parameter list. This parameter must be a type.
141 If it is used in signature of a template, TEMPLATE_INFO is NULL_TREE.
142 Otherwise it is used to declare a type like TT<int>.
143 The TYPE_FIELDS value will be a TEMPLATE_PARM_INDEX. */
144 DEFTREECODE (TEMPLATE_TEMPLATE_PARM, "template_template_parm", 't', 0)
146 /* A type designated by `typename T::t'. TYPE_CONTEXT is `T',
147 TYPE_NAME is an IDENTIFIER_NODE for `t'. If the type was named via
148 template-id, TYPENAME_TYPE_FULLNAME will hold the TEMPLATE_ID_EXPR.
149 If TREE_TYPE is present, this type was generated by the implicit
150 typename extension, and the TREE_TYPE is a _TYPE from a baseclass
152 DEFTREECODE (TYPENAME_TYPE, "typename_type", 't', 0)
154 /* A type designated by `__typeof (expr)'. TYPE_FIELDS is the
155 expression in question. */
156 DEFTREECODE (TYPEOF_TYPE, "typeof_type", 't', 0)
158 /* A thunk is a stub function.
160 Thunks are used to implement multiple inheritance:
161 At run-time, such a thunk subtracts THUNK_DELTA (an int, not a tree)
162 from the this pointer, and then jumps to DECL_INITIAL
163 (which is an ADDR_EXPR whose operand is a FUNCTION_DECL).
165 Other kinds of thunks may be defined later. */
166 DEFTREECODE (THUNK_DECL, "thunk_decl", 'd', 0)
168 /* A using declaration. DECL_INITIAL contains the specified scope.
169 This is not an alias, but is later expanded into multiple aliases. */
170 DEFTREECODE (USING_DECL, "using_decl", 'd', 0)
172 /* An un-parsed default argument. Looks like an IDENTIFIER_NODE. */
173 DEFTREECODE (DEFAULT_ARG, "default_arg", 'c', 2)
175 /* A template-id, like foo<int>. The first operand is the template.
176 The second is the TREE_LIST or TREE_VEC of explicitly specified
177 arguments. The template will be a FUNCTION_DECL, TEMPLATE_DECL, or
178 an OVERLOAD. If the template-id refers to a member template, the
179 template may be an IDENTIFIER_NODE. */
180 DEFTREECODE (TEMPLATE_ID_EXPR, "template_id_expr", 'e', 2)
182 /* An association between name and entity. Parameters are the scope
183 and the (non-type) value. TREE_TYPE indicates the type bound to
185 DEFTREECODE (CPLUS_BINDING, "binding", 'x', 2)
187 /* A list-like node for chaining overloading candidates. TREE_TYPE is
188 the original name, and the parameter is the FUNCTION_DECL. */
189 DEFTREECODE (OVERLOAD, "overload", 'x', 1)
191 /* A generic wrapper for something not tree that we want to include in
193 DEFTREECODE (WRAPPER, "wrapper", 'x', 1)
195 /* A node to remember a source position. */
196 DEFTREECODE (SRCLOC, "srcloc", 'x', 2)
198 /* Used to represent deferred name lookup for dependent names while
199 parsing a template declaration. The first argument is an
200 IDENTIFIER_NODE for the name in question. The TREE_TYPE is
202 DEFTREECODE (LOOKUP_EXPR, "lookup_expr", 'e', 1)
204 /* A whole bunch of tree codes for the initial, superficial parsing of
206 DEFTREECODE (MODOP_EXPR, "modop_expr", 'e', 3)
207 DEFTREECODE (CAST_EXPR, "cast_expr", '1', 1)
208 DEFTREECODE (REINTERPRET_CAST_EXPR, "reinterpret_cast_expr", '1', 1)
209 DEFTREECODE (CONST_CAST_EXPR, "const_cast_expr", '1', 1)
210 DEFTREECODE (STATIC_CAST_EXPR, "static_cast_expr", '1', 1)
211 DEFTREECODE (DYNAMIC_CAST_EXPR, "dynamic_cast_expr", '1', 1)
212 DEFTREECODE (SIZEOF_EXPR, "sizeof_expr", '1', 1)
213 DEFTREECODE (ALIGNOF_EXPR, "alignof_expr", '1', 1)
214 DEFTREECODE (ARROW_EXPR, "arrow_expr", 'e', 1)
215 DEFTREECODE (DOTSTAR_EXPR, "dotstar_expr", 'e', 2)
216 DEFTREECODE (TYPEID_EXPR, "typeid_expr", 'e', 1)
217 DEFTREECODE (PSEUDO_DTOR_EXPR, "pseudo_dtor_expr", 'e', 3)
219 DEFTREECODE (EXPR_STMT, "expr_stmt", 'e', 1)
220 DEFTREECODE (COMPOUND_STMT, "compound_stmt", 'e', 1)
221 DEFTREECODE (DECL_STMT, "decl_stmt", 'e', 1)
222 DEFTREECODE (IF_STMT, "if_stmt", 'e', 3)
223 DEFTREECODE (FOR_STMT, "for_stmt", 'e', 4)
224 DEFTREECODE (WHILE_STMT, "while_stmt", 'e', 2)
225 DEFTREECODE (DO_STMT, "do_stmt", 'e', 2)
226 DEFTREECODE (RETURN_STMT, "return_stmt", 'e', 1)
227 DEFTREECODE (BREAK_STMT, "break_stmt", 'e', 0)
228 DEFTREECODE (CONTINUE_STMT, "continue_stmt", 'e', 0)
229 DEFTREECODE (SWITCH_STMT, "switch_stmt", 'e', 2)
230 DEFTREECODE (GOTO_STMT, "goto_stmt", 'e', 1)
231 DEFTREECODE (LABEL_STMT, "label_stmt", 'e', 1)
232 DEFTREECODE (ASM_STMT, "asm_stmt", 'e', 5)
233 /* A SUBOBJECT statement marks the point at which a sub-object is
234 fully constructed. After this point, the SUBOBJECT_CLEANUP must be
235 run if an exception is thrown before the end of the enclosing
237 DEFTREECODE (SUBOBJECT, "subobject", 'e', 1)
238 /* A CLEANUP_STMT marks the point at which a declaration is fully
239 constructed. If, after this point, the CLEANUP_DECL goes out of
240 scope, the CLEANUP_EXPR must be run. */
241 DEFTREECODE (CLEANUP_STMT, "cleanup_stmt", 'e', 2)
242 /* A START_CATCH_STMT marks the beginning of a catch handler for the
243 the START_CATCH_TYPE. If this is CATCH_ALL_TYPE, then the handler
244 catches all types. */
245 DEFTREECODE (START_CATCH_STMT, "start_catch_stmt", 'e', 0)
246 /* A SCOPE_STMT marks the beginning or end of a scope. If
247 SCOPE_BEGIN_P holds, then this is the start of a scope. If
248 SCOPE_END_P holds, then this is the end of a scope. If
249 SCOPE_NULLIFIED_P holds then there turned out to be no variables in
251 DEFTREECODE (SCOPE_STMT, "scope_stmt", 'e', 0)
252 DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer", 'e', 2)
253 DEFTREECODE (CASE_LABEL, "case_label", 'e', 2)
254 DEFTREECODE (RETURN_INIT, "return_init", 'e', 2)
255 DEFTREECODE (TRY_BLOCK, "try_block", 'e', 2)
256 DEFTREECODE (HANDLER, "handler", 'e', 2)
258 /* A STMT_EXPR represents a statement-expression. The
259 STMT_EXPR_STMT is the statement given by the expression. */
260 DEFTREECODE (STMT_EXPR, "stmt_expr", 'e', 1)
262 DEFTREECODE (TAG_DEFN, "tag_defn", 'e', 0)
264 /* And some codes for expressing conversions for overload resolution. */
266 DEFTREECODE (IDENTITY_CONV, "identity_conv", 'e', 1)
267 DEFTREECODE (LVALUE_CONV, "lvalue_conv", 'e', 1)
268 DEFTREECODE (QUAL_CONV, "qual_conv", 'e', 1)
269 DEFTREECODE (STD_CONV, "std_conv", 'e', 1)
270 DEFTREECODE (PTR_CONV, "ptr_conv", 'e', 1)
271 DEFTREECODE (PMEM_CONV, "pmem_conv", 'e', 1)
272 DEFTREECODE (BASE_CONV, "base_conv", 'e', 1)
273 DEFTREECODE (REF_BIND, "ref_bind", 'e', 1)
274 DEFTREECODE (USER_CONV, "user_conv", 'e', 2)
275 DEFTREECODE (AMBIG_CONV, "ambig_conv", 'e', 1)
276 DEFTREECODE (RVALUE_CONV, "rvalue_conv", 'e', 1)