gcc/cp/cp-tree.def

   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 Free Software Foundation, Inc.
   5    Hacked by Michael Tiemann (tiemann@cygnus.com)
   6
   7 This file is part of GNU CC.
   8
   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)
  12 any later version.
  13
  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.
  18
  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.  */
  23
  24
  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)
  31
  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', 1)
  36
  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)
  42
  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)
  48
  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)
  54
  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)
  59
  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)
  63
  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)
  68
  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)
  72
  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)
  77
  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
  80    accessing this data.
  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
  85    For class template:
  86         DECL_INITIAL            associated templates (methods &c)
  87         DECL_RESULT             null
  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)
  92  */
  93 DEFTREECODE (TEMPLATE_DECL, "template_decl", 'd', 0)
  94
  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.
  98
  99    Here's an example:
 100
 101    template <class T> // Index 0, Level 1.
 102    struct S
 103    {
 104       template <class U, // Index 0, Level 2.
 105                 class V> // Index 1, Level 2.
 106       void f();
 107    };
 108
 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:
 117
 118    struct S<int>
 119    {
 120      template <class U, // Index 0, Level 1, Orig Level 2
 121                class V> // Index 1, Level 1, Orig Level 2
 122      void f();
 123    };
 124
 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              2 + ((3 * sizeof (HOST_WIDE_INT) + sizeof(char*) - 1)
 134                   / sizeof (char*)))
 135
 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)
 139
 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)
 145
 146 /* A type designated by `typename T::t'.  TYPE_CONTEXT is `T',
 147    TYPE_NAME is a TYPE_DECL for `t'.  If TREE_TYPE is present, this
 148    type was generated by the implicit typename extension, and the
 149    TREE_TYPE is a _TYPE from a baseclass of `T'.  */
 150 DEFTREECODE (TYPENAME_TYPE, "typename_type", 't', 0)
 151
 152 /* A type designated by `__typeof (expr)'.  TYPE_FIELDS is the
 153    expression in question.  */
 154 DEFTREECODE (TYPEOF_TYPE, "typeof_type", 't', 0)
 155
 156 /* A thunk is a stub function.
 157
 158    Thunks are used to implement multiple inheritance:
 159    At run-time, such a thunk subtracts THUNK_DELTA (an int, not a tree)
 160    from the this pointer, and then jumps to DECL_INITIAL
 161    (which is an ADDR_EXPR whose operand is a FUNCTION_DECL).
 162
 163    Other kinds of thunks may be defined later. */
 164 DEFTREECODE (THUNK_DECL, "thunk_decl", 'd', 0)
 165
 166 /* A using declaration.  DECL_INITIAL contains the specified scope.
 167    This is not an alias, but is later expanded into multiple aliases.  */
 168 DEFTREECODE (USING_DECL, "using_decl", 'd', 0)
 169
 170 /* An un-parsed default argument.  Looks like an IDENTIFIER_NODE.  */
 171 DEFTREECODE (DEFAULT_ARG, "default_arg", 'c', 2)
 172
 173 /* A template-id, like foo<int>.  The first operand is the template.
 174    The second is the list of explicitly specified arguments.  The
 175    template will be a FUNCTION_DECL, TEMPLATE_DECL, or a list of
 176    overloaded functions and templates if the template-id refers to
 177    a global template.  If the template-id refers to a member template,
 178    the template may be an IDENTIFIER_NODE.  */
 179 DEFTREECODE (TEMPLATE_ID_EXPR, "template_id_expr", 'e', 2)
 180
 181 /* An association between namespace and entity. Parameters are the
 182    scope and the (non-type) value.
 183    TREE_TYPE indicates the type bound to the name. */
 184 DEFTREECODE (CPLUS_BINDING, "binding", 'x', 2)
 185
 186 /* A list-like node for chaining overloading candidates. TREE_TYPE is
 187    the original name, and the parameter is the FUNCTION_DECL.  */
 188 DEFTREECODE (OVERLOAD, "overload", 'x', 1)
 189
 190 /* A generic wrapper for something not tree that we want to include in
 191    tree structure.  */
 192 DEFTREECODE (WRAPPER, "wrapper", 'x', 1)
 193
 194 /* A node to remember a source position.  */
 195 DEFTREECODE (SRCLOC, "srcloc", 'x', 2)
 196
 197 /* Used to represent deferred name lookup for dependent names while
 198    parsing a template declaration.  The first argument is an
 199    IDENTIFIER_NODE for the name in question.  The TREE_TYPE is
 200    unused.  */
 201 DEFTREECODE (LOOKUP_EXPR, "lookup_expr", 'e', 1)
 202
 203 /* A whole bunch of tree codes for the initial, superficial parsing of
 204    templates.  */
 205 DEFTREECODE (MODOP_EXPR, "modop_expr", 'e', 3)
 206 DEFTREECODE (CAST_EXPR, "cast_expr", '1', 1)
 207 DEFTREECODE (REINTERPRET_CAST_EXPR, "reinterpret_cast_expr", '1', 1)
 208 DEFTREECODE (CONST_CAST_EXPR, "const_cast_expr", '1', 1)
 209 DEFTREECODE (STATIC_CAST_EXPR, "static_cast_expr", '1', 1)
 210 DEFTREECODE (DYNAMIC_CAST_EXPR, "dynamic_cast_expr", '1', 1)
 211 DEFTREECODE (SIZEOF_EXPR, "sizeof_expr", '1', 1)
 212 DEFTREECODE (ALIGNOF_EXPR, "alignof_expr", '1', 1)
 213 DEFTREECODE (ARROW_EXPR, "arrow_expr", 'e', 1)
 214 DEFTREECODE (DOTSTAR_EXPR, "dotstar_expr", 'e', 2)
 215 DEFTREECODE (TYPEID_EXPR, "typeid_expr", 'e', 1)
 216
 217 DEFTREECODE (EXPR_STMT, "expr_stmt", 'e', 1)
 218 DEFTREECODE (COMPOUND_STMT, "compound_stmt", 'e', 1)
 219 DEFTREECODE (DECL_STMT, "decl_stmt", 'e', 3)
 220 DEFTREECODE (IF_STMT, "if_stmt", 'e', 3)
 221 DEFTREECODE (FOR_STMT, "for_stmt", 'e', 4)
 222 DEFTREECODE (WHILE_STMT, "while_stmt", 'e', 2)
 223 DEFTREECODE (DO_STMT, "do_stmt", 'e', 2)
 224 DEFTREECODE (RETURN_STMT, "return_stmt", 'e', 1)
 225 DEFTREECODE (BREAK_STMT, "break_stmt", 'e', 0)
 226 DEFTREECODE (CONTINUE_STMT, "continue_stmt", 'e', 0)
 227 DEFTREECODE (SWITCH_STMT, "switch_stmt", 'e', 2)
 228 DEFTREECODE (GOTO_STMT, "goto_stmt", 'e', 1)
 229 DEFTREECODE (ASM_STMT, "asm_stmt", 'e', 5)
 230
 231 DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer", 'e', 2)
 232 DEFTREECODE (CASE_LABEL, "case_label", 'e', 2)
 233 DEFTREECODE (RETURN_INIT, "return_init", 'e', 2)
 234 DEFTREECODE (TRY_BLOCK, "try_stmt", 'e', 2)
 235 DEFTREECODE (HANDLER, "catch_stmt", 'e', 2)
 236
 237 DEFTREECODE (TAG_DEFN, "tag_defn", 'e', 0)
 238
 239 /* And some codes for expressing conversions for overload resolution.  */
 240
 241 DEFTREECODE (IDENTITY_CONV, "identity_conv", 'e', 1)
 242 DEFTREECODE (LVALUE_CONV, "lvalue_conv", 'e', 1)
 243 DEFTREECODE (QUAL_CONV, "qual_conv", 'e', 1)
 244 DEFTREECODE (STD_CONV, "std_conv", 'e', 1)
 245 DEFTREECODE (PTR_CONV, "ptr_conv", 'e', 1)
 246 DEFTREECODE (PMEM_CONV, "pmem_conv", 'e', 1)
 247 DEFTREECODE (BASE_CONV, "base_conv", 'e', 1)
 248 DEFTREECODE (REF_BIND, "ref_bind", 'e', 1)
 249 DEFTREECODE (USER_CONV, "user_conv", 'e', 2)
 250 DEFTREECODE (AMBIG_CONV, "ambig_conv", 'e', 1)
 251 DEFTREECODE (RVALUE_CONV, "rvalue_conv", 'e', 1)
 252
 253 /*
 254 Local variables:
 255 mode:c
 256 End:
 257 */