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, 1997, 1998,
   5    1999, 2000, 2001 Free Software Foundation, Inc.
   6    Hacked by Michael Tiemann (tiemann@cygnus.com)
   7
   8 This file is part of GNU CC.
   9
  10 GNU CC is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 2, or (at your option)
  13 any later version.
  14
  15 GNU CC is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with GNU CC; see the file COPYING.  If not, write to
  22 the Free Software Foundation, 59 Temple Place - Suite 330,
  23 Boston, MA 02111-1307, USA.  */
  24
  25
  26 /* Reference to the contents of an offset
  27    (a value whose type is an OFFSET_TYPE).
  28    Operand 0 is the object within which the offset is taken.
  29    Operand 1 is the offset.  The language independent OFFSET_REF
  30    just won't work for us.  */
  31 DEFTREECODE (OFFSET_REF, "offset_ref", 'r', 2)
  32
  33 /* A pointer-to-member constant.  For a pointer-to-member constant
  34    `X::Y' The PTRMEM_CST_CLASS is the RECORD_TYPE for `X' and the
  35    PTRMEM_CST_MEMBER is the _DECL for `Y'.  */
  36 DEFTREECODE (PTRMEM_CST, "ptrmem_cst", 'c', 2)
  37
  38 /* For NEW_EXPR, operand 0 is the placement list.
  39    Operand 1 is the new-declarator.
  40    Operand 2 is the initializer.  */
  41 DEFTREECODE (NEW_EXPR, "nw_expr", 'e', 3)
  42 DEFTREECODE (VEC_NEW_EXPR, "vec_nw_expr", 'e', 3)
  43
  44 /* For DELETE_EXPR, operand 0 is the store to be destroyed.
  45    Operand 1 is the value to pass to the destroying function
  46    saying whether the store should be deallocated as well.  */
  47 DEFTREECODE (DELETE_EXPR, "dl_expr", 'e', 2)
  48 DEFTREECODE (VEC_DELETE_EXPR, "vec_dl_expr", 'e', 2)
  49
  50 /* Value is reference to particular overloaded class method.
  51    Operand 0 is the class name (an IDENTIFIER_NODE);
  52    operand 1 is the field (also an IDENTIFIER_NODE).
  53    The COMPLEXITY field holds the class level (usually 0).  */
  54 DEFTREECODE (SCOPE_REF, "scope_ref", 'r', 2)
  55
  56 /* When composing an object with a member, this is the result.
  57    Operand 0 is the object.  Operand 1 is the member (usually
  58    a dereferenced pointer to member).  */
  59 DEFTREECODE (MEMBER_REF, "member_ref", 'r', 2)
  60
  61 /* Type conversion operator in C++.  TREE_TYPE is type that this
  62    operator converts to.  Operand is expression to be converted.  */
  63 DEFTREECODE (TYPE_EXPR, "type_expr", 'e', 1)
  64
  65 /* For AGGR_INIT_EXPR, operand 0 is function which performs initialization,
  66    operand 1 is argument list to initialization function,
  67    and operand 2 is the slot which was allocated for this expression.  */
  68 DEFTREECODE (AGGR_INIT_EXPR, "aggr_init_expr", 'e', 3)
  69
  70 /* A throw expression.  operand 0 is the expression, if there was one,
  71    else it is NULL_TREE.  */
  72 DEFTREECODE (THROW_EXPR, "throw_expr", 'e', 1)
  73
  74 /* An empty class object.  The TREE_TYPE gives the class type.  We use
  75    these to avoid actually creating instances of the empty classes.  */
  76 DEFTREECODE (EMPTY_CLASS_EXPR, "empty_class_expr", 'e', 0)
  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(tree) - 1) in the next expression
 130                 is to handle the case when padding pushes us past an even
 131                 multiple of sizeof(tree).  */
 132              /* We used to try to calculate this using
 133                 1+3*sizeof(HOST_WIDE_INT), but that fails if alignment
 134                 makes it bigger.  */
 135              ((sizeof (template_parm_index) - sizeof (struct tree_common))
 136               + sizeof (tree) - 1)
 137              / sizeof (tree))
 138
 139 /* Index into a template parameter list.  This parameter must be a type.
 140    The TYPE_FIELDS value will be a TEMPLATE_PARM_INDEX.  */
 141 DEFTREECODE (TEMPLATE_TYPE_PARM, "template_type_parm", 't', 0)
 142
 143 /* Index into a template parameter list for template template parameters.
 144    This parameter must be a type.  The TYPE_FIELDS value will be a
 145    TEMPLATE_PARM_INDEX.
 146
 147    It is used without template arguments like TT in C<TT>,
 148    TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO is NULL_TREE
 149    and TYPE_NAME is a TEMPLATE_DECL.  */
 150 DEFTREECODE (TEMPLATE_TEMPLATE_PARM, "template_template_parm", 't', 0)
 151
 152 /* Like TEMPLATE_TEMPLATE_PARM it is used with bound template arguments
 153    like TT<int>.
 154    In this case, TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO contains the
 155    template name and its bound arguments.  TYPE_NAME is a TYPE_DECL.  */
 156 DEFTREECODE (BOUND_TEMPLATE_TEMPLATE_PARM, "bound_template_template_parm", 't', 0)
 157
 158 /* A type designated by `typename T::t'.  TYPE_CONTEXT is `T',
 159    TYPE_NAME is an IDENTIFIER_NODE for `t'.  If the type was named via
 160    template-id, TYPENAME_TYPE_FULLNAME will hold the TEMPLATE_ID_EXPR.
 161    If TREE_TYPE is present, this type was generated by the implicit
 162    typename extension, and the TREE_TYPE is a _TYPE from a baseclass
 163    of `T'.  */
 164 DEFTREECODE (TYPENAME_TYPE, "typename_type", 't', 0)
 165
 166 /* A type designated by `__typeof (expr)'.  TYPE_FIELDS is the
 167    expression in question.  */
 168 DEFTREECODE (TYPEOF_TYPE, "typeof_type", 't', 0)
 169
 170 /* A using declaration.  DECL_INITIAL contains the specified scope.
 171    This is not an alias, but is later expanded into multiple aliases.  */
 172 DEFTREECODE (USING_DECL, "using_decl", 'd', 0)
 173
 174 /* A using directive. The operand is USING_STMT_NAMESPACE. */
 175 DEFTREECODE (USING_STMT, "using_directive", 'e', 1)
 176
 177 /* An un-parsed default argument.  Looks like an IDENTIFIER_NODE.  */
 178 DEFTREECODE (DEFAULT_ARG, "default_arg", 'x', 2)
 179
 180 /* A template-id, like foo<int>.  The first operand is the template.
 181    The second is the TREE_LIST or TREE_VEC of explicitly specified
 182    arguments.  The template will be a FUNCTION_DECL, TEMPLATE_DECL, or
 183    an OVERLOAD.  If the template-id refers to a member template, the
 184    template may be an IDENTIFIER_NODE.  */
 185 DEFTREECODE (TEMPLATE_ID_EXPR, "template_id_expr", 'e', 2)
 186
 187 /* An association between name and entity. Parameters are the scope
 188    and the (non-type) value.  TREE_TYPE indicates the type bound to
 189    the name. */
 190 DEFTREECODE (CPLUS_BINDING, "binding", 'x', 2)
 191
 192 /* A list-like node for chaining overloading candidates. TREE_TYPE is
 193    the original name, and the parameter is the FUNCTION_DECL.  */
 194 DEFTREECODE (OVERLOAD, "overload", 'x', 1)
 195
 196 /* A generic wrapper for something not tree that we want to include in
 197    tree structure.  */
 198 DEFTREECODE (WRAPPER, "wrapper", 'x', 1)
 199
 200 /* Used to represent deferred name lookup for dependent names while
 201    parsing a template declaration.  The first argument is an
 202    IDENTIFIER_NODE for the name in question.  The TREE_TYPE is
 203    unused.  */
 204 DEFTREECODE (LOOKUP_EXPR, "lookup_expr", 'e', 1)
 205
 206 /* A whole bunch of tree codes for the initial, superficial parsing of
 207    templates.  */
 208 DEFTREECODE (MODOP_EXPR, "modop_expr", 'e', 3)
 209 DEFTREECODE (CAST_EXPR, "cast_expr", '1', 1)
 210 DEFTREECODE (REINTERPRET_CAST_EXPR, "reinterpret_cast_expr", '1', 1)
 211 DEFTREECODE (CONST_CAST_EXPR, "const_cast_expr", '1', 1)
 212 DEFTREECODE (STATIC_CAST_EXPR, "static_cast_expr", '1', 1)
 213 DEFTREECODE (DYNAMIC_CAST_EXPR, "dynamic_cast_expr", '1', 1)
 214 DEFTREECODE (DOTSTAR_EXPR, "dotstar_expr", 'e', 2)
 215 DEFTREECODE (TYPEID_EXPR, "typeid_expr", 'e', 1)
 216 DEFTREECODE (PSEUDO_DTOR_EXPR, "pseudo_dtor_expr", 'e', 3)
 217
 218 /* A SUBOBJECT statement marks the point at which a sub-object is
 219    fully constructed.  After this point, the SUBOBJECT_CLEANUP must be
 220    run if an exception is thrown before the end of the enclosing
 221    function.  */
 222 DEFTREECODE (SUBOBJECT, "subobject", 'e', 1)
 223 /* An CTOR_STMT marks the beginning (if CTOR_BEGIN_P holds) or end of
 224    a constructor (if CTOR_END_P) holds.  At the end of a constructor,
 225    the cleanups associated with any SUBOBJECT_CLEANUPS need no longer
 226    be run.  */
 227 DEFTREECODE (CTOR_STMT, "ctor_stmt", 'e', 0)
 228 /* A CLEANUP_STMT marks the point at which a declaration is fully
 229    constructed.  If, after this point, the CLEANUP_DECL goes out of
 230    scope, the CLEANUP_EXPR must be run.  */
 231 DEFTREECODE (CLEANUP_STMT, "cleanup_stmt", 'e', 2)
 232 DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer", 'e', 2)
 233 DEFTREECODE (RETURN_INIT, "return_init", 'e', 2)
 234 DEFTREECODE (TRY_BLOCK, "try_block", 'e', 2)
 235 DEFTREECODE (EH_SPEC_BLOCK, "eh_spec_block", 'e', 2)
 236 /* A HANDLER wraps a catch handler for the HANDLER_TYPE.  If this is
 237    CATCH_ALL_TYPE, then the handler catches all types.  The declaration of
 238    the catch variable is in HANDLER_PARMS, and the body block in
 239    HANDLER_BODY.  */
 240 DEFTREECODE (HANDLER, "handler", 'e', 2)
 241
 242 /* A MUST_NOT_THROW_EXPR wraps an expression that may not
 243    throw, and must call terminate if it does.  */
 244 DEFTREECODE (MUST_NOT_THROW_EXPR, "must_not_throw_expr", 'e', 1)
 245
 246 DEFTREECODE (TAG_DEFN, "tag_defn", 'e', 0)
 247
 248 /* And some codes for expressing conversions for overload resolution.  */
 249
 250 DEFTREECODE (IDENTITY_CONV, "identity_conv", 'e', 1)
 251 DEFTREECODE (LVALUE_CONV, "lvalue_conv", 'e', 1)
 252 DEFTREECODE (QUAL_CONV, "qual_conv", 'e', 1)
 253 DEFTREECODE (STD_CONV, "std_conv", 'e', 1)
 254 DEFTREECODE (PTR_CONV, "ptr_conv", 'e', 1)
 255 DEFTREECODE (PMEM_CONV, "pmem_conv", 'e', 1)
 256 DEFTREECODE (BASE_CONV, "base_conv", 'e', 1)
 257 DEFTREECODE (REF_BIND, "ref_bind", 'e', 1)
 258 DEFTREECODE (USER_CONV, "user_conv", 'e', 2)
 259 DEFTREECODE (AMBIG_CONV, "ambig_conv", 'e', 1)
 260 DEFTREECODE (RVALUE_CONV, "rvalue_conv", 'e', 1)
 261
 262 /*
 263 Local variables:
 264 mode:c
 265 End:
 266 */