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, 2003, 2004, 2005,
   5    1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2010
   6    Free Software Foundation, Inc.
   7    Hacked by Michael Tiemann (tiemann@cygnus.com)
   8
   9 This file is part of GCC.
  10
  11 GCC is free software; you can redistribute it and/or modify
  12 it under the terms of the GNU General Public License as published by
  13 the Free Software Foundation; either version 3, or (at your option)
  14 any later version.
  15
  16 GCC is distributed in the hope that it will be useful,
  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
  22 along with GCC; see the file COPYING3.  If not see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25
  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
  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').
  32
  33       The expression is a pointer-to-member if its address is taken,
  34       but simply denotes a member of the object if its address is not
  35       taken.
  36
  37       This form is only used during the parsing phase; once semantic
  38       analysis has taken place they are eliminated.
  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
  42       expression with pointer-to-member type.  */
  43 DEFTREECODE (OFFSET_REF, "offset_ref", tcc_reference, 2)
  44
  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'.  */
  48 DEFTREECODE (PTRMEM_CST, "ptrmem_cst", tcc_constant, 0)
  49
  50 /* For NEW_EXPR, operand 0 is the placement list.
  51    Operand 1 is the new-declarator.
  52    Operand 2 is the number of elements in the array.
  53    Operand 3 is the initializer.  */
  54 DEFTREECODE (NEW_EXPR, "nw_expr", tcc_expression, 4)
  55 DEFTREECODE (VEC_NEW_EXPR, "vec_nw_expr", tcc_expression, 3)
  56
  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.  */
  60 DEFTREECODE (DELETE_EXPR, "dl_expr", tcc_expression, 2)
  61 DEFTREECODE (VEC_DELETE_EXPR, "vec_dl_expr", tcc_expression, 2)
  62
  63 /* Value is reference to particular overloaded class method.
  64    Operand 0 is the class, operand 1 is the field
  65    The COMPLEXITY field holds the class level (usually 0).  */
  66 DEFTREECODE (SCOPE_REF, "scope_ref", tcc_reference, 2)
  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).  */
  71 DEFTREECODE (MEMBER_REF, "member_ref", tcc_reference, 2)
  72
  73 /* Type conversion operator in C++.  TREE_TYPE is type that this
  74    operator converts to.  Operand is expression to be converted.  */
  75 DEFTREECODE (TYPE_EXPR, "type_expr", tcc_expression, 1)
  76
  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)
  83
  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
  89 /* A throw expression.  operand 0 is the expression, if there was one,
  90    else it is NULL_TREE.  */
  91 DEFTREECODE (THROW_EXPR, "throw_expr", tcc_expression, 1)
  92
  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.  */
  95 DEFTREECODE (EMPTY_CLASS_EXPR, "empty_class_expr", tcc_expression, 0)
  96
  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
 103    base used to name the functions.
 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
 108    overloaded.  */
 109 DEFTREECODE (BASELINK, "baselink", tcc_exceptional, 0)
 110
 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.
 114         DECL_ARGUMENTS          template parm vector
 115         DECL_TEMPLATE_INFO      template text &c
 116         DECL_VINDEX             list of instantiations already produced;
 117                                 only done for functions so far
 118    For class template:
 119         DECL_INITIAL            associated templates (methods &c)
 120         DECL_TEMPLATE_RESULT    null
 121    For non-class templates:
 122         TREE_TYPE               type of object to be constructed
 123         DECL_TEMPLATE_RESULT    decl for object to be created
 124                                 (e.g., FUNCTION_DECL with tmpl parms used)
 125  */
 126 DEFTREECODE (TEMPLATE_DECL, "template_decl", tcc_declaration, 0)
 127
 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:
 133
 134    template <class T> // Index 0, Level 1.
 135    struct S
 136    {
 137       template <class U, // Index 0, Level 2.
 138                 class V> // Index 1, Level 2.
 139       void f();
 140    };
 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
 154                class V> // Index 1, Level 1, Orig Level 2
 155      void f();
 156    };
 157
 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.  */
 161 DEFTREECODE (TEMPLATE_PARM_INDEX, "template_parm_index", tcc_exceptional, 0)
 162
 163 /* Index into a template parameter list for template template parameters.
 164    This parameter must be a type.  The TYPE_FIELDS value will be a
 165    TEMPLATE_PARM_INDEX.
 166
 167    It is used without template arguments like TT in C<TT>,
 168    TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO is NULL_TREE
 169    and TYPE_NAME is a TEMPLATE_DECL.  */
 170 DEFTREECODE (TEMPLATE_TEMPLATE_PARM, "template_template_parm", tcc_type, 0)
 171
 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.  */
 176
 177 /* Index into a template parameter list.  This parameter must be a type.
 178    The type.values field will be a TEMPLATE_PARM_INDEX.  */
 179 DEFTREECODE (TEMPLATE_TYPE_PARM, "template_type_parm", tcc_type, 0)
 180
 181 /* A type designated by `typename T::t'.  TYPE_CONTEXT is `T',
 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.
 184    TREE_TYPE is always NULL.  */
 185 DEFTREECODE (TYPENAME_TYPE, "typename_type", tcc_type, 0)
 186
 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
 191 /* Like TEMPLATE_TEMPLATE_PARM it is used with bound template arguments
 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
 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.  */
 201 DEFTREECODE (UNBOUND_CLASS_TEMPLATE, "unbound_class_template", tcc_type, 0)
 202
 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.  */
 207 DEFTREECODE (USING_DECL, "using_decl", tcc_declaration, 0)
 208
 209 /* A using directive. The operand is USING_STMT_NAMESPACE.  */
 210 DEFTREECODE (USING_STMT, "using_directive", tcc_statement, 1)
 211
 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.  */
 215 DEFTREECODE (DEFAULT_ARG, "default_arg", tcc_exceptional, 0)
 216
 217 /* A template-id, like foo<int>.  The first operand is the template.
 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.  */
 222 DEFTREECODE (TEMPLATE_ID_EXPR, "template_id_expr", tcc_expression, 2)
 223
 224 /* A list-like node for chaining overloading candidates. TREE_TYPE is
 225    the original name, and the parameter is the FUNCTION_DECL.  */
 226 DEFTREECODE (OVERLOAD, "overload", tcc_exceptional, 0)
 227
 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
 232    first operand will always be a scalar type.
 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
 237    being used in expressions in ways that are not permitted.  */
 238 DEFTREECODE (PSEUDO_DTOR_EXPR, "pseudo_dtor_expr", tcc_expression, 3)
 239
 240 /* A whole bunch of tree codes for the initial, superficial parsing of
 241    templates.  */
 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)
 250 DEFTREECODE (NOEXCEPT_EXPR, "noexcept_expr", tcc_unary, 1)
 251
 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
 259    the original expression.  The expression is the only operand -- it
 260    is only needed for diagnostics.  */
 261 DEFTREECODE (NON_DEPENDENT_EXPR, "non_dependent_expr", tcc_expression, 1)
 262
 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).  */
 265 DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer", tcc_expression, 1)
 266
 267 DEFTREECODE (TRY_BLOCK, "try_block", tcc_statement, 2)
 268
 269 DEFTREECODE (EH_SPEC_BLOCK, "eh_spec_block", tcc_statement, 2)
 270
 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.  */
 275 DEFTREECODE (HANDLER, "handler", tcc_statement, 2)
 276
 277 /* A MUST_NOT_THROW_EXPR wraps an expression that may not
 278    throw, and must call terminate if it does.  */
 279 DEFTREECODE (MUST_NOT_THROW_EXPR, "must_not_throw_expr", tcc_expression, 1)
 280
 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.  */
 284 DEFTREECODE (CLEANUP_STMT, "cleanup_stmt", tcc_statement, 3)
 285
 286 /* Represents an 'if' statement. The operands are IF_COND,
 287    THEN_CLAUSE, and ELSE_CLAUSE, respectively.  */
 288 /* ??? It is currently still necessary to distinguish between IF_STMT
 289    and COND_EXPR for the benefit of templates.  */
 290 DEFTREECODE (IF_STMT, "if_stmt", tcc_statement, 3)
 291
 292 /* Used to represent a `for' statement. The operands are
 293    FOR_INIT_STMT, FOR_COND, FOR_EXPR, and FOR_BODY, respectively.  */
 294 DEFTREECODE (FOR_STMT, "for_stmt", tcc_statement, 4)
 295
 296 /* Used to represent a range-based `for' statement. The operands are
 297    RANGE_FOR_DECL, RANGE_FOR_EXPR, RANGE_FOR_BODY, respectively.  Only used
 298    in templates.  */
 299 DEFTREECODE (RANGE_FOR_STMT, "range_for_stmt", tcc_statement, 3)
 300
 301 /* Used to represent a 'while' statement. The operands are WHILE_COND
 302    and WHILE_BODY, respectively.  */
 303 DEFTREECODE (WHILE_STMT, "while_stmt", tcc_statement, 2)
 304
 305 /* Used to represent a 'do' statement. The operands are DO_BODY and
 306    DO_COND, respectively.  */
 307 DEFTREECODE (DO_STMT, "do_stmt", tcc_statement, 2)
 308
 309 /* Used to represent a 'break' statement.  */
 310 DEFTREECODE (BREAK_STMT, "break_stmt", tcc_statement, 0)
 311
 312 /* Used to represent a 'continue' statement.  */
 313 DEFTREECODE (CONTINUE_STMT, "continue_stmt", tcc_statement, 0)
 314
 315 /* Used to represent a 'switch' statement. The operands are
 316    SWITCH_STMT_COND, SWITCH_STMT_BODY and SWITCH_STMT_TYPE, respectively.  */
 317 DEFTREECODE (SWITCH_STMT, "switch_stmt", tcc_statement, 3)
 318
 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
 323 DEFTREECODE (TAG_DEFN, "tag_defn", tcc_expression, 0)
 324
 325 /* Represents an 'offsetof' expression during template expansion.  */
 326 DEFTREECODE (OFFSETOF_EXPR, "offsetof_expr", tcc_expression, 1)
 327
 328 /* Represents a 'sizeof' expression during template expansion.  */
 329 DEFTREECODE (SIZEOF_EXPR, "sizeof_expr", tcc_expression, 1)
 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.  */
 336 DEFTREECODE (ALIGNOF_EXPR, "alignof_expr", tcc_expression, 1)
 337
 338 /* Represents an Objective-C++ '@encode' expression during template
 339    expansion.  */
 340 DEFTREECODE (AT_ENCODE_EXPR, "at_encode_expr", tcc_expression, 1)
 341
 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
 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
 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
 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
 374    with the argument pack <int, float, double>. ARGUMENT_PACK_ARGS will
 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
 406    template arguments. Its PACK_EXPANSION_PATTERN is "Values&" and its
 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
 429 /** C++ extensions. */
 430
 431 /* Represents a trait expression during template expansion.  */
 432 DEFTREECODE (TRAIT_EXPR, "trait_expr", tcc_exceptional, 0)
 433
 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
 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
 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.  */
 450 DEFTREECODE (DECLTYPE_TYPE, "decltype_type", tcc_type, 0)
 451
 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
 462 /*
 463 Local variables:
 464 mode:c
 465 End:
 466 */