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      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) 1987-2013 Free Software Foundation, Inc.
      5    Hacked by Michael Tiemann (tiemann (at) cygnus.com)
      6 
      7 This file is part of GCC.
      8 
      9 GCC 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 3, or (at your option)
     12 any later version.
     13 
     14 GCC 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 GCC; see the file COPYING3.  If not see
     21 <http://www.gnu.org/licenses/>.  */
     22 
     23 
     24 /* An OFFSET_REF is used in two situations:
     25 
     26    1. An expression of the form `A::m' where `A' is a class and `m' is
     27       a non-static member.  In this case, operand 0 will be a TYPE
     28       (corresponding to `A') and operand 1 will be a FIELD_DECL,
     29       BASELINK, or TEMPLATE_ID_EXPR (corresponding to `m').
     30 
     31       The expression is a pointer-to-member if its address is taken,
     32       but simply denotes a member of the object if its address is not
     33       taken.
     34 
     35       This form is only used during the parsing phase; once semantic
     36       analysis has taken place they are eliminated.
     37 
     38    2. An expression of the form `x.*p'.  In this case, operand 0 will
     39       be an expression corresponding to `x' and operand 1 will be an
     40       expression with pointer-to-member type.  */
     41 DEFTREECODE (OFFSET_REF, "offset_ref", tcc_reference, 2)
     42 
     43 /* A pointer-to-member constant.  For a pointer-to-member constant
     44    `X::Y' The PTRMEM_CST_CLASS is the RECORD_TYPE for `X' and the
     45    PTRMEM_CST_MEMBER is the _DECL for `Y'.  */
     46 DEFTREECODE (PTRMEM_CST, "ptrmem_cst", tcc_constant, 0)
     47 
     48 /* For NEW_EXPR, operand 0 is the placement list.
     49    Operand 1 is the new-declarator.
     50    Operand 2 is the number of elements in the array.
     51    Operand 3 is the initializer.  */
     52 DEFTREECODE (NEW_EXPR, "nw_expr", tcc_expression, 4)
     53 DEFTREECODE (VEC_NEW_EXPR, "vec_nw_expr", tcc_expression, 3)
     54 
     55 /* For DELETE_EXPR, operand 0 is the store to be destroyed.
     56    Operand 1 is the value to pass to the destroying function
     57    saying whether the store should be deallocated as well.  */
     58 DEFTREECODE (DELETE_EXPR, "dl_expr", tcc_expression, 2)
     59 DEFTREECODE (VEC_DELETE_EXPR, "vec_dl_expr", tcc_expression, 2)
     60 
     61 /* Value is reference to particular overloaded class method.
     62    Operand 0 is the class, operand 1 is the field
     63    The COMPLEXITY field holds the class level (usually 0).  */
     64 DEFTREECODE (SCOPE_REF, "scope_ref", tcc_reference, 2)
     65 
     66 /* When composing an object with a member, this is the result.
     67    Operand 0 is the object.  Operand 1 is the member (usually
     68    a dereferenced pointer to member).  */
     69 DEFTREECODE (MEMBER_REF, "member_ref", tcc_reference, 2)
     70 
     71 /* Type conversion operator in C++.  TREE_TYPE is type that this
     72    operator converts to.  Operand is expression to be converted.  */
     73 DEFTREECODE (TYPE_EXPR, "type_expr", tcc_expression, 1)
     74 
     75 /* AGGR_INIT_EXPRs have a variably-sized representation similar to
     76    that of CALL_EXPRs.  Operand 0 is an INTEGER_CST node containing the
     77    operand count, operand 1 is the function which performs initialization,
     78    operand 2 is the slot which was allocated for this expression, and
     79    the remaining operands are the arguments to the initialization function.  */
     80 DEFTREECODE (AGGR_INIT_EXPR, "aggr_init_expr", tcc_vl_exp, 3)
     81 
     82 /* Initialization of an array from another array, expressed at a high level
     83    so that it works with TARGET_EXPR.  Operand 0 is the target, operand 1
     84    is the initializer.  */
     85 DEFTREECODE (VEC_INIT_EXPR, "vec_init_expr", tcc_expression, 2)
     86 
     87 /* A throw expression.  operand 0 is the expression, if there was one,
     88    else it is NULL_TREE.  */
     89 DEFTREECODE (THROW_EXPR, "throw_expr", tcc_expression, 1)
     90 
     91 /* An empty class object.  The TREE_TYPE gives the class type.  We use
     92    these to avoid actually creating instances of the empty classes.  */
     93 DEFTREECODE (EMPTY_CLASS_EXPR, "empty_class_expr", tcc_expression, 0)
     94 
     95 /* A reference to a member function or member functions from a base
     96    class.  BASELINK_FUNCTIONS gives the FUNCTION_DECL,
     97    TEMPLATE_DECL, OVERLOAD, or TEMPLATE_ID_EXPR corresponding to the
     98    functions.  BASELINK_BINFO gives the base from which the functions
     99    come, i.e., the base to which the `this' pointer must be converted
    100    before the functions are called.  BASELINK_ACCESS_BINFO gives the
    101    base used to name the functions.
    102 
    103    A BASELINK is an expression; the TREE_TYPE of the BASELINK gives
    104    the type of the expression.  This type is either a FUNCTION_TYPE,
    105    METHOD_TYPE, or `unknown_type_node' indicating that the function is
    106    overloaded.  */
    107 DEFTREECODE (BASELINK, "baselink", tcc_exceptional, 0)
    108 
    109 /* Template definition.  The following fields have the specified uses,
    110    although there are other macros in cp-tree.h that should be used for
    111    accessing this data.
    112 	DECL_ARGUMENTS		template parm vector
    113 	DECL_TEMPLATE_INFO      template text &c
    114 	DECL_VINDEX		list of instantiations already produced;
    115 				only done for functions so far
    116    For class template:
    117 	DECL_INITIAL		associated templates (methods &c)
    118 	DECL_TEMPLATE_RESULT    null
    119    For non-class templates:
    120 	TREE_TYPE		type of object to be constructed
    121 	DECL_TEMPLATE_RESULT    decl for object to be created
    122 				(e.g., FUNCTION_DECL with tmpl parms used)
    123  */
    124 DEFTREECODE (TEMPLATE_DECL, "template_decl", tcc_declaration, 0)
    125 
    126 /* Index into a template parameter list.  The TEMPLATE_PARM_IDX gives
    127    the index (from 0) of the parameter, while the TEMPLATE_PARM_LEVEL
    128    gives the level (from 1) of the parameter.
    129 
    130    Here's an example:
    131 
    132    template <class T> // Index 0, Level 1.
    133    struct S
    134    {
    135       template <class U, // Index 0, Level 2.
    136 		class V> // Index 1, Level 2.
    137       void f();
    138    };
    139 
    140    The DESCENDANTS will be a chain of TEMPLATE_PARM_INDEXs descended
    141    from this one.  The first descendant will have the same IDX, but
    142    its LEVEL will be one less.  The TREE_CHAIN field is used to chain
    143    together the descendants.  The TEMPLATE_PARM_DECL is the
    144    declaration of this parameter, either a TYPE_DECL or CONST_DECL.
    145    The TEMPLATE_PARM_ORIG_LEVEL is the LEVEL of the most distant
    146    parent, i.e., the LEVEL that the parameter originally had when it
    147    was declared.  For example, if we instantiate S<int>, we will have:
    148 
    149    struct S<int>
    150    {
    151      template <class U, // Index 0, Level 1, Orig Level 2
    152 	       class V> // Index 1, Level 1, Orig Level 2
    153      void f();
    154    };
    155 
    156    The LEVEL is the level of the parameter when we are worrying about
    157    the types of things; the ORIG_LEVEL is the level when we are
    158    worrying about instantiating things.  */
    159 DEFTREECODE (TEMPLATE_PARM_INDEX, "template_parm_index", tcc_exceptional, 0)
    160 
    161 /* Index into a template parameter list for template template parameters.
    162    This parameter must be a type.  The TYPE_FIELDS value will be a
    163    TEMPLATE_PARM_INDEX.
    164 
    165    It is used without template arguments like TT in C<TT>,
    166    TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO is NULL_TREE
    167    and TYPE_NAME is a TEMPLATE_DECL.  */
    168 DEFTREECODE (TEMPLATE_TEMPLATE_PARM, "template_template_parm", tcc_type, 0)
    169 
    170 /* The ordering of the following codes is optimized for the checking
    171    macros in tree.h.  Changing the order will degrade the speed of the
    172    compiler.  TEMPLATE_TYPE_PARM, TYPENAME_TYPE, TYPEOF_TYPE,
    173    BOUND_TEMPLATE_TEMPLATE_PARM.  */
    174 
    175 /* Index into a template parameter list.  This parameter must be a type.
    176    The type.values field will be a TEMPLATE_PARM_INDEX.  */
    177 DEFTREECODE (TEMPLATE_TYPE_PARM, "template_type_parm", tcc_type, 0)
    178 
    179 /* A type designated by `typename T::t'.  TYPE_CONTEXT is `T',
    180    TYPE_NAME is an IDENTIFIER_NODE for `t'.  If the type was named via
    181    template-id, TYPENAME_TYPE_FULLNAME will hold the TEMPLATE_ID_EXPR.
    182    TREE_TYPE is always NULL.  */
    183 DEFTREECODE (TYPENAME_TYPE, "typename_type", tcc_type, 0)
    184 
    185 /* A type designated by `__typeof (expr)'.  TYPEOF_TYPE_EXPR is the
    186    expression in question.  */
    187 DEFTREECODE (TYPEOF_TYPE, "typeof_type", tcc_type, 0)
    188 
    189 /* Like TEMPLATE_TEMPLATE_PARM it is used with bound template arguments
    190    like TT<int>.
    191    In this case, TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO contains the
    192    template name and its bound arguments.  TYPE_NAME is a TYPE_DECL.  */
    193 DEFTREECODE (BOUND_TEMPLATE_TEMPLATE_PARM, "bound_template_template_parm",
    194 	     tcc_type, 0)
    195 
    196 /* For template template argument of the form `T::template C'.
    197    TYPE_CONTEXT is `T', the template parameter dependent object.
    198    TYPE_NAME is an IDENTIFIER_NODE for `C', the member class template.  */
    199 DEFTREECODE (UNBOUND_CLASS_TEMPLATE, "unbound_class_template", tcc_type, 0)
    200 
    201 /* A using declaration.  USING_DECL_SCOPE contains the specified
    202    scope.  In a member using decl, unless DECL_DEPENDENT_P is true,
    203    USING_DECL_DECLS contains the _DECL or OVERLOAD so named.  This is
    204    not an alias, but is later expanded into multiple aliases.  */
    205 DEFTREECODE (USING_DECL, "using_decl", tcc_declaration, 0)
    206 
    207 /* A using directive. The operand is USING_STMT_NAMESPACE.  */
    208 DEFTREECODE (USING_STMT, "using_stmt", tcc_statement, 1)
    209 
    210 /* An un-parsed default argument.  Holds a vector of input tokens and
    211    a vector of places where the argument was instantiated before
    212    parsing had occurred.  */
    213 DEFTREECODE (DEFAULT_ARG, "default_arg", tcc_exceptional, 0)
    214 
    215 /* An uninstantiated noexcept-specification.  DEFERRED_NOEXCEPT_PATTERN is
    216    the pattern from the template, and DEFERRED_NOEXCEPT_ARGS are the
    217    template arguments to substitute into the pattern when needed.  */
    218 DEFTREECODE (DEFERRED_NOEXCEPT, "deferred_noexcept", tcc_exceptional, 0)
    219 
    220 /* A template-id, like foo<int>.  The first operand is the template.
    221    The second is NULL if there are no explicit arguments, or a
    222    TREE_VEC of arguments.  The template will be a FUNCTION_DECL,
    223    TEMPLATE_DECL, or an OVERLOAD.  If the template-id refers to a
    224    member template, the template may be an IDENTIFIER_NODE.  */
    225 DEFTREECODE (TEMPLATE_ID_EXPR, "template_id_expr", tcc_expression, 2)
    226 
    227 /* A list-like node for chaining overloading candidates. TREE_TYPE is
    228    the original name, and the parameter is the FUNCTION_DECL.  */
    229 DEFTREECODE (OVERLOAD, "overload", tcc_exceptional, 0)
    230 
    231 /* A pseudo-destructor, of the form "OBJECT.~DESTRUCTOR" or
    232    "OBJECT.SCOPE::~DESTRUCTOR.  The first operand is the OBJECT.  The
    233    second operand (if non-NULL) is the SCOPE.  The third operand is
    234    the TYPE node corresponding to the DESTRUCTOR.  The type of the
    235    first operand will always be a scalar type.
    236 
    237    The type of a PSEUDO_DTOR_EXPR is always "void", even though it can
    238    be used as if it were a zero-argument function.  We handle the
    239    function-call case specially, and giving it "void" type prevents it
    240    being used in expressions in ways that are not permitted.  */
    241 DEFTREECODE (PSEUDO_DTOR_EXPR, "pseudo_dtor_expr", tcc_expression, 3)
    242 
    243 /* A whole bunch of tree codes for the initial, superficial parsing of
    244    templates.  */
    245 DEFTREECODE (MODOP_EXPR, "modop_expr", tcc_expression, 3)
    246 DEFTREECODE (CAST_EXPR, "cast_expr", tcc_unary, 1)
    247 DEFTREECODE (REINTERPRET_CAST_EXPR, "reinterpret_cast_expr", tcc_unary, 1)
    248 DEFTREECODE (CONST_CAST_EXPR, "const_cast_expr", tcc_unary, 1)
    249 DEFTREECODE (STATIC_CAST_EXPR, "static_cast_expr", tcc_unary, 1)
    250 DEFTREECODE (DYNAMIC_CAST_EXPR, "dynamic_cast_expr", tcc_unary, 1)
    251 DEFTREECODE (IMPLICIT_CONV_EXPR, "implicit_conv_expr", tcc_unary, 1)
    252 DEFTREECODE (DOTSTAR_EXPR, "dotstar_expr", tcc_expression, 2)
    253 DEFTREECODE (TYPEID_EXPR, "typeid_expr", tcc_expression, 1)
    254 DEFTREECODE (NOEXCEPT_EXPR, "noexcept_expr", tcc_unary, 1)
    255 
    256 /* A placeholder for an expression that is not type-dependent, but
    257    does occur in a template.  When an expression that is not
    258    type-dependent appears in a larger expression, we must compute the
    259    type of that larger expression.  That computation would normally
    260    modify the original expression, which would change the mangling of
    261    that expression if it appeared in a template argument list.  In
    262    that situation, we create a NON_DEPENDENT_EXPR to take the place of
    263    the original expression.  The expression is the only operand -- it
    264    is only needed for diagnostics.  */
    265 DEFTREECODE (NON_DEPENDENT_EXPR, "non_dependent_expr", tcc_expression, 1)
    266 
    267 /* CTOR_INITIALIZER is a placeholder in template code for a call to
    268    setup_vtbl_pointer (and appears in all functions, not just ctors).  */
    269 DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer", tcc_expression, 1)
    270 
    271 DEFTREECODE (TRY_BLOCK, "try_block", tcc_statement, 2)
    272 
    273 DEFTREECODE (EH_SPEC_BLOCK, "eh_spec_block", tcc_statement, 2)
    274 
    275 /* A HANDLER wraps a catch handler for the HANDLER_TYPE.  If this is
    276    CATCH_ALL_TYPE, then the handler catches all types.  The declaration of
    277    the catch variable is in HANDLER_PARMS, and the body block in
    278    HANDLER_BODY.  */
    279 DEFTREECODE (HANDLER, "handler", tcc_statement, 2)
    280 
    281 /* A MUST_NOT_THROW_EXPR wraps an expression that may not
    282    throw, and must call terminate if it does.  The second argument
    283    is a condition, used in templates to express noexcept (condition).  */
    284 DEFTREECODE (MUST_NOT_THROW_EXPR, "must_not_throw_expr", tcc_expression, 2)
    285 
    286 /* A CLEANUP_STMT marks the point at which a declaration is fully
    287    constructed.  The CLEANUP_EXPR is run on behalf of CLEANUP_DECL
    288    when CLEANUP_BODY completes.  */
    289 DEFTREECODE (CLEANUP_STMT, "cleanup_stmt", tcc_statement, 3)
    290 
    291 /* Represents an 'if' statement. The operands are IF_COND,
    292    THEN_CLAUSE, and ELSE_CLAUSE, and the current scope, respectively.  */
    293 /* ??? It is currently still necessary to distinguish between IF_STMT
    294    and COND_EXPR for the benefit of templates.  */
    295 DEFTREECODE (IF_STMT, "if_stmt", tcc_statement, 4)
    296 
    297 /* Used to represent a `for' statement. The operands are
    298    FOR_INIT_STMT, FOR_COND, FOR_EXPR, and FOR_BODY, respectively.  */
    299 DEFTREECODE (FOR_STMT, "for_stmt", tcc_statement, 5)
    300 
    301 /* Used to represent a range-based `for' statement. The operands are
    302    RANGE_FOR_DECL, RANGE_FOR_EXPR, RANGE_FOR_BODY, and RANGE_FOR_SCOPE,
    303    respectively.  Only used in templates.  */
    304 DEFTREECODE (RANGE_FOR_STMT, "range_for_stmt", tcc_statement, 4)
    305 
    306 /* Used to represent a 'while' statement. The operands are WHILE_COND
    307    and WHILE_BODY, respectively.  */
    308 DEFTREECODE (WHILE_STMT, "while_stmt", tcc_statement, 2)
    309 
    310 /* Used to represent a 'do' statement. The operands are DO_BODY and
    311    DO_COND, respectively.  */
    312 DEFTREECODE (DO_STMT, "do_stmt", tcc_statement, 2)
    313 
    314 /* Used to represent a 'break' statement.  */
    315 DEFTREECODE (BREAK_STMT, "break_stmt", tcc_statement, 0)
    316 
    317 /* Used to represent a 'continue' statement.  */
    318 DEFTREECODE (CONTINUE_STMT, "continue_stmt", tcc_statement, 0)
    319 
    320 /* Used to represent a 'switch' statement. The operands are
    321    SWITCH_STMT_COND, SWITCH_STMT_BODY, SWITCH_STMT_TYPE, and
    322    SWITCH_STMT_SCOPE, respectively.  */
    323 DEFTREECODE (SWITCH_STMT, "switch_stmt", tcc_statement, 4)
    324 
    325 /* Used to represent an expression statement.  Use `EXPR_STMT_EXPR' to
    326    obtain the expression.  */
    327 DEFTREECODE (EXPR_STMT, "expr_stmt", tcc_expression, 1)
    328 
    329 DEFTREECODE (TAG_DEFN, "tag_defn", tcc_expression, 0)
    330 
    331 /* Represents an 'offsetof' expression during template expansion.  */
    332 DEFTREECODE (OFFSETOF_EXPR, "offsetof_expr", tcc_expression, 1)
    333 
    334 /* Represents the -> operator during template expansion.  */
    335 DEFTREECODE (ARROW_EXPR, "arrow_expr", tcc_expression, 1)
    336 
    337 /* Represents an '__alignof__' expression during template
    338    expansion.  */
    339 DEFTREECODE (ALIGNOF_EXPR, "alignof_expr", tcc_expression, 1)
    340 
    341 /* Represents an Objective-C++ '@encode' expression during template
    342    expansion.  */
    343 DEFTREECODE (AT_ENCODE_EXPR, "at_encode_expr", tcc_expression, 1)
    344 
    345 /* A STMT_EXPR represents a statement-expression during template
    346    expansion.  This is the GCC extension { ( ... ) }.  The
    347    STMT_EXPR_STMT is the statement given by the expression.  */
    348 DEFTREECODE (STMT_EXPR, "stmt_expr", tcc_expression, 1)
    349 
    350 /* Unary plus. Operand 0 is the expression to which the unary plus
    351    is applied.  */
    352 DEFTREECODE (UNARY_PLUS_EXPR, "unary_plus_expr", tcc_unary, 1)
    353 
    354 /** C++0x extensions. */
    355 
    356 /* A static assertion.  This is a C++0x extension.
    357    STATIC_ASSERT_CONDITION contains the condition that is being
    358    checked.  STATIC_ASSERT_MESSAGE contains the message (a string
    359    literal) to be displayed if the condition fails to hold.  */
    360 DEFTREECODE (STATIC_ASSERT, "static_assert", tcc_exceptional, 0)
    361 
    362 /* Represents an argument pack of types (or templates). An argument
    363    pack stores zero or more arguments that will be used to instantiate
    364    a parameter pack.
    365 
    366    ARGUMENT_PACK_ARGS retrieves the arguments stored in the argument
    367    pack.
    368 
    369    Example:
    370      template<typename... Values>
    371      class tuple { ... };
    372 
    373      tuple<int, float, double> t;
    374 
    375    Values is a (template) parameter pack. When tuple<int, float,
    376    double> is instantiated, the Values parameter pack is instantiated
    377    with the argument pack <int, float, double>. ARGUMENT_PACK_ARGS will
    378    be a TREE_VEC containing int, float, and double.  */
    379 DEFTREECODE (TYPE_ARGUMENT_PACK, "type_argument_pack", tcc_type, 0)
    380 
    381 /* Represents an argument pack of values, which can be used either for
    382    non-type template arguments or function call arguments.
    383 
    384    NONTYPE_ARGUMENT_PACK plays precisely the same role as
    385    TYPE_ARGUMENT_PACK, but will be used for packing non-type template
    386    arguments (e.g., "int... Dimensions") or function arguments ("const
    387    Args&... args"). */
    388 DEFTREECODE (NONTYPE_ARGUMENT_PACK, "nontype_argument_pack", tcc_expression, 1)
    389 
    390 /* Represents a type expression that will be expanded into a list of
    391    types when instantiated with one or more argument packs.
    392 
    393    PACK_EXPANSION_PATTERN retrieves the expansion pattern. This is
    394    the type or expression that we will substitute into with each
    395    argument in an argument pack.
    396 
    397    SET_PACK_EXPANSION_PATTERN sets the expansion pattern.
    398 
    399    PACK_EXPANSION_PARAMETER_PACKS contains a TREE_LIST of the parameter
    400    packs that are used in this pack expansion.
    401 
    402    Example:
    403      template<typename... Values>
    404      struct tied : tuple<Values&...> {
    405        // ...
    406      };
    407 
    408    The derivation from tuple contains a TYPE_PACK_EXPANSION for the
    409    template arguments. Its PACK_EXPANSION_PATTERN is "Values&" and its
    410    PACK_EXPANSION_PARAMETER_PACKS will contain "Values".  */
    411 DEFTREECODE (TYPE_PACK_EXPANSION, "type_pack_expansion", tcc_type, 0)
    412 
    413 /* Represents an expression that will be expanded into a list of
    414    expressions when instantiated with one or more argument packs.
    415 
    416    EXPR_PACK_EXPANSION plays precisely the same role as TYPE_PACK_EXPANSION,
    417    but will be used for expressions.  */
    418 DEFTREECODE (EXPR_PACK_EXPANSION, "expr_pack_expansion", tcc_expression, 3)
    419 
    420 /* Selects the Ith parameter out of an argument pack. This node will
    421    be used when instantiating pack expansions; see
    422    tsubst_pack_expansion.
    423 
    424    ARGUMENT_PACK_SELECT_FROM_PACK contains the *_ARGUMENT_PACK node
    425    from which the argument will be selected.
    426 
    427    ARGUMENT_PACK_SELECT_INDEX contains the index into the argument
    428    pack that will be returned by this ARGUMENT_PACK_SELECT node. The
    429    index is a machine integer.  */
    430 DEFTREECODE (ARGUMENT_PACK_SELECT, "argument_pack_select", tcc_exceptional, 0)
    431 
    432 /** C++ extensions. */
    433 
    434 /* Represents a trait expression during template expansion.  */
    435 DEFTREECODE (TRAIT_EXPR, "trait_expr", tcc_exceptional, 0)
    436 
    437 /* A lambda expression.  This is a C++0x extension.
    438    LAMBDA_EXPR_DEFAULT_CAPTURE_MODE is an enum for the default, which may be
    439    none.
    440    LAMBDA_EXPR_CAPTURE_LIST holds the capture-list, including `this'.
    441    LAMBDA_EXPR_THIS_CAPTURE goes straight to the capture of `this', if it exists.
    442    LAMBDA_EXPR_PENDING_PROXIES is a vector of capture proxies which need to
    443    be pushed once scope returns to the lambda.
    444    LAMBDA_EXPR_MUTABLE_P signals whether this lambda was declared mutable.
    445    LAMBDA_EXPR_RETURN_TYPE holds the return type, if it was specified.  */
    446 DEFTREECODE (LAMBDA_EXPR, "lambda_expr", tcc_exceptional, 0)
    447 
    448 /* The declared type of an expression.  This is a C++0x extension.
    449    DECLTYPE_TYPE_EXPR is the expression whose type we are computing.
    450    DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P states whether the
    451    expression was parsed as an id-expression or a member access
    452    expression. When false, it was parsed as a full expression.
    453    DECLTYPE_FOR_LAMBDA_CAPTURE is set if we want lambda capture semantics.
    454    DECLTYPE_FOR_LAMBDA_RETURN is set if we want lambda return deduction.  */
    455 DEFTREECODE (DECLTYPE_TYPE, "decltype_type", tcc_type, 0)
    456 
    457 /* A type designated by `__underlying_type (type)'.
    458    UNDERLYING_TYPE_TYPE is the type in question.  */
    459 DEFTREECODE (UNDERLYING_TYPE, "underlying_type", tcc_type, 0)
    460 
    461 /* A type designated by one of the bases type traits.
    462    BASES_TYPE is the type in question.  */
    463 DEFTREECODE (BASES, "bases", tcc_type, 0)
    464 
    465 /* Used to represent the template information stored by template
    466    specializations.
    467    The accessors are:
    468    TI_TEMPLATE the template declaration associated to the specialization
    469    TI_ARGS the arguments of the template specialization
    470    TI_TYPEDEFS_NEEDING_ACCESS_CHECKING the vector of typedefs used in
    471    the pattern of the template for which access check is needed at template
    472    instantiation time.  */
    473 DEFTREECODE (TEMPLATE_INFO, "template_info", tcc_exceptional, 0)
    474 
    475 /*
    476 Local variables:
    477 mode:c
    478 End:
    479 */
    480