| /* This file contains the definitions and documentation for the |
| additional tree codes used in the GNU C++ compiler (see tree.def |
| for the standard codes). |
| Copyright (C) 1987-2021 Free Software Foundation, Inc. |
| Hacked by Michael Tiemann (tiemann@cygnus.com) |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3, or (at your option) |
| any later version. |
| |
| GCC is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| |
| /* An OFFSET_REF is used in two situations: |
| |
| 1. An expression of the form `A::m' where `A' is a class and `m' is |
| a non-static member. In this case, operand 0 will be a TYPE |
| (corresponding to `A') and operand 1 will be a FIELD_DECL, |
| BASELINK, or TEMPLATE_ID_EXPR (corresponding to `m'). |
| |
| The expression is a pointer-to-member if its address is taken, |
| but simply denotes a member of the object if its address is not |
| taken. |
| |
| This form is only used during the parsing phase; once semantic |
| analysis has taken place they are eliminated. |
| |
| 2. An expression of the form `x.*p'. In this case, operand 0 will |
| be an expression corresponding to `x' and operand 1 will be an |
| expression with pointer-to-member type. */ |
| DEFTREECODE (OFFSET_REF, "offset_ref", tcc_reference, 2) |
| |
| /* A pointer-to-member constant. For a pointer-to-member constant |
| `X::Y' The PTRMEM_CST_CLASS is the RECORD_TYPE for `X' and the |
| PTRMEM_CST_MEMBER is the _DECL for `Y'. */ |
| DEFTREECODE (PTRMEM_CST, "ptrmem_cst", tcc_constant, 0) |
| |
| /* For NEW_EXPR, operand 0 is the placement list. |
| Operand 1 is the new-declarator. |
| Operand 2 is the number of elements in the array. |
| Operand 3 is the initializer. */ |
| DEFTREECODE (NEW_EXPR, "nw_expr", tcc_expression, 4) |
| DEFTREECODE (VEC_NEW_EXPR, "vec_nw_expr", tcc_expression, 3) |
| |
| /* For DELETE_EXPR, operand 0 is the store to be destroyed. |
| Operand 1 is the value to pass to the destroying function |
| saying whether the store should be deallocated as well. */ |
| DEFTREECODE (DELETE_EXPR, "dl_expr", tcc_expression, 2) |
| DEFTREECODE (VEC_DELETE_EXPR, "vec_dl_expr", tcc_expression, 2) |
| |
| /* Value is reference to particular overloaded class method. |
| Operand 0 is the class, operand 1 is the field |
| The COMPLEXITY field holds the class level (usually 0). */ |
| DEFTREECODE (SCOPE_REF, "scope_ref", tcc_reference, 2) |
| |
| /* When composing an object with a member, this is the result. |
| Operand 0 is the object. Operand 1 is the member (usually |
| a dereferenced pointer to member). */ |
| DEFTREECODE (MEMBER_REF, "member_ref", tcc_reference, 2) |
| |
| /* Type conversion operator in C++. TREE_TYPE is type that this |
| operator converts to. Operand is expression to be converted. */ |
| DEFTREECODE (TYPE_EXPR, "type_expr", tcc_expression, 1) |
| |
| /* AGGR_INIT_EXPRs have a variably-sized representation similar to |
| that of CALL_EXPRs. Operand 0 is an INTEGER_CST node containing the |
| operand count, operand 1 is the function which performs initialization, |
| operand 2 is the slot which was allocated for this expression, and |
| the remaining operands are the arguments to the initialization function. */ |
| DEFTREECODE (AGGR_INIT_EXPR, "aggr_init_expr", tcc_vl_exp, 3) |
| |
| /* Initialization of an array from another array, expressed at a high level |
| so that it works with TARGET_EXPR. Operand 0 is the target, operand 1 |
| is the initializer. */ |
| DEFTREECODE (VEC_INIT_EXPR, "vec_init_expr", tcc_expression, 2) |
| |
| /* A throw expression. operand 0 is the expression, if there was one, |
| else it is NULL_TREE. */ |
| DEFTREECODE (THROW_EXPR, "throw_expr", tcc_expression, 1) |
| |
| /* An empty class object. The TREE_TYPE gives the class type. We use |
| these to avoid actually creating instances of the empty classes. */ |
| DEFTREECODE (EMPTY_CLASS_EXPR, "empty_class_expr", tcc_expression, 0) |
| |
| /* A reference to a member function or member functions from a base |
| class. BASELINK_FUNCTIONS gives the FUNCTION_DECL, |
| TEMPLATE_DECL, OVERLOAD, or TEMPLATE_ID_EXPR corresponding to the |
| functions. BASELINK_BINFO gives the base from which the functions |
| come, i.e., the base to which the `this' pointer must be converted |
| before the functions are called. BASELINK_ACCESS_BINFO gives the |
| base used to name the functions. |
| |
| A BASELINK is an expression; the TREE_TYPE of the BASELINK gives |
| the type of the expression. This type is either a FUNCTION_TYPE, |
| METHOD_TYPE, or `unknown_type_node' indicating that the function is |
| overloaded. */ |
| DEFTREECODE (BASELINK, "baselink", tcc_exceptional, 0) |
| |
| /* Template definition. The following fields have the specified uses, |
| although there are other macros in cp-tree.h that should be used for |
| accessing this data. |
| DECL_ARGUMENTS template parm vector |
| DECL_TEMPLATE_INFO template text &c |
| DECL_VINDEX list of instantiations already produced; |
| only done for functions so far |
| For class template: |
| DECL_INITIAL associated templates (methods &c) |
| DECL_TEMPLATE_RESULT null |
| For non-class templates: |
| TREE_TYPE type of object to be constructed |
| DECL_TEMPLATE_RESULT decl for object to be created |
| (e.g., FUNCTION_DECL with tmpl parms used) |
| */ |
| DEFTREECODE (TEMPLATE_DECL, "template_decl", tcc_declaration, 0) |
| |
| /* Index into a template parameter list. The TEMPLATE_PARM_IDX gives |
| the index (from 0) of the parameter, while the TEMPLATE_PARM_LEVEL |
| gives the level (from 1) of the parameter. |
| |
| Here's an example: |
| |
| template <class T> // Index 0, Level 1. |
| struct S |
| { |
| template <class U, // Index 0, Level 2. |
| class V> // Index 1, Level 2. |
| void f(); |
| }; |
| |
| The DESCENDANTS will be a chain of TEMPLATE_PARM_INDEXs descended |
| from this one. The first descendant will have the same IDX, but |
| its LEVEL will be one less. The TREE_CHAIN field is used to chain |
| together the descendants. The TEMPLATE_PARM_DECL is the |
| declaration of this parameter, either a TYPE_DECL or CONST_DECL. |
| The TEMPLATE_PARM_ORIG_LEVEL is the LEVEL of the most distant |
| parent, i.e., the LEVEL that the parameter originally had when it |
| was declared. For example, if we instantiate S<int>, we will have: |
| |
| struct S<int> |
| { |
| template <class U, // Index 0, Level 1, Orig Level 2 |
| class V> // Index 1, Level 1, Orig Level 2 |
| void f(); |
| }; |
| |
| The LEVEL is the level of the parameter when we are worrying about |
| the types of things; the ORIG_LEVEL is the level when we are |
| worrying about instantiating things. */ |
| DEFTREECODE (TEMPLATE_PARM_INDEX, "template_parm_index", tcc_exceptional, 0) |
| |
| /* Index into a template parameter list for template template parameters. |
| This parameter must be a type. The TYPE_FIELDS value will be a |
| TEMPLATE_PARM_INDEX. |
| |
| It is used without template arguments like TT in C<TT>, |
| TYPE_NAME is a TEMPLATE_DECL. */ |
| DEFTREECODE (TEMPLATE_TEMPLATE_PARM, "template_template_parm", tcc_type, 0) |
| |
| /* The ordering of the following codes is optimized for the checking |
| macros in tree.h. Changing the order will degrade the speed of the |
| compiler. TEMPLATE_TYPE_PARM, TYPENAME_TYPE, TYPEOF_TYPE, |
| BOUND_TEMPLATE_TEMPLATE_PARM. */ |
| |
| /* Index into a template parameter list. This parameter must be a type. |
| The type.values field will be a TEMPLATE_PARM_INDEX. */ |
| DEFTREECODE (TEMPLATE_TYPE_PARM, "template_type_parm", tcc_type, 0) |
| |
| /* A type designated by `typename T::t'. TYPE_CONTEXT is `T', |
| TYPE_NAME is an IDENTIFIER_NODE for `t'. If the type was named via |
| template-id, TYPENAME_TYPE_FULLNAME will hold the TEMPLATE_ID_EXPR. |
| TREE_TYPE is always NULL. */ |
| DEFTREECODE (TYPENAME_TYPE, "typename_type", tcc_type, 0) |
| |
| /* A type designated by `__typeof (expr)'. TYPEOF_TYPE_EXPR is the |
| expression in question. */ |
| DEFTREECODE (TYPEOF_TYPE, "typeof_type", tcc_type, 0) |
| |
| /* Like TEMPLATE_TEMPLATE_PARM it is used with bound template arguments |
| like TT<int>. |
| In this case, TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO contains the |
| template name and its bound arguments. TYPE_NAME is a TYPE_DECL. */ |
| DEFTREECODE (BOUND_TEMPLATE_TEMPLATE_PARM, "bound_template_template_parm", |
| tcc_type, 0) |
| |
| /* For template template argument of the form `T::template C'. |
| TYPE_CONTEXT is `T', the template parameter dependent object. |
| TYPE_NAME is a TEMPLATE_DECL, whose DECL_TEMPLATE_PARMS are any |
| template parms of the instantiation. That decl's DECL_NAME is the |
| IDENTIFIER_NODE for `C', the member class template. */ |
| DEFTREECODE (UNBOUND_CLASS_TEMPLATE, "unbound_class_template", tcc_type, 0) |
| |
| /* A using declaration. USING_DECL_SCOPE contains the specified |
| scope. In a variadic using-declaration, this is a TYPE_PACK_EXPANSION. |
| In a member using decl, unless DECL_DEPENDENT_P is true, |
| USING_DECL_DECLS contains the _DECL or OVERLOAD so named. This is |
| not an alias, but is later expanded into multiple aliases. */ |
| DEFTREECODE (USING_DECL, "using_decl", tcc_declaration, 0) |
| |
| /* A using directive. The operand is USING_STMT_NAMESPACE. */ |
| DEFTREECODE (USING_STMT, "using_stmt", tcc_statement, 1) |
| |
| /* An un-parsed operand. Holds a vector of input tokens and |
| a vector of places where the argument was instantiated before |
| parsing had occurred. This is used for default arguments, delayed |
| NSDMIs, and noexcept-specifier parsing. */ |
| DEFTREECODE (DEFERRED_PARSE, "deferred_parse", tcc_exceptional, 0) |
| |
| /* An uninstantiated/unevaluated noexcept-specification. For the |
| uninstantiated case, DEFERRED_NOEXCEPT_PATTERN is the pattern from the |
| template, and DEFERRED_NOEXCEPT_ARGS are the template arguments to |
| substitute into the pattern when needed. For the unevaluated case, |
| those slots are NULL_TREE and we use get_defaulted_eh_spec to find |
| the exception-specification. */ |
| DEFTREECODE (DEFERRED_NOEXCEPT, "deferred_noexcept", tcc_exceptional, 0) |
| |
| /* A template-id, like foo<int>. The first operand is the template. |
| The second is NULL if there are no explicit arguments, or a |
| TREE_VEC of arguments. The template will be a FUNCTION_DECL, |
| TEMPLATE_DECL, or an OVERLOAD. If the template-id refers to a |
| member template, the template may be an IDENTIFIER_NODE. */ |
| DEFTREECODE (TEMPLATE_ID_EXPR, "template_id_expr", tcc_expression, 2) |
| |
| /* One of a set of overloaded functions. */ |
| DEFTREECODE (OVERLOAD, "overload", tcc_exceptional, 0) |
| |
| /* A vector of binding slots. */ |
| DEFTREECODE (BINDING_VECTOR, "binding_vector", tcc_exceptional, 0) |
| |
| /* A pseudo-destructor, of the form "OBJECT.~DESTRUCTOR" or |
| "OBJECT.SCOPE::~DESTRUCTOR. The first operand is the OBJECT. The |
| second operand (if non-NULL) is the SCOPE. The third operand is |
| the TYPE node corresponding to the DESTRUCTOR. The type of the |
| first operand will always be a scalar type. |
| |
| The type of a PSEUDO_DTOR_EXPR is always "void", even though it can |
| be used as if it were a zero-argument function. We handle the |
| function-call case specially, and giving it "void" type prevents it |
| being used in expressions in ways that are not permitted. */ |
| DEFTREECODE (PSEUDO_DTOR_EXPR, "pseudo_dtor_expr", tcc_expression, 3) |
| |
| /* A whole bunch of tree codes for the initial, superficial parsing of |
| templates. */ |
| DEFTREECODE (MODOP_EXPR, "modop_expr", tcc_expression, 3) |
| DEFTREECODE (CAST_EXPR, "cast_expr", tcc_unary, 1) |
| DEFTREECODE (REINTERPRET_CAST_EXPR, "reinterpret_cast_expr", tcc_unary, 1) |
| DEFTREECODE (CONST_CAST_EXPR, "const_cast_expr", tcc_unary, 1) |
| DEFTREECODE (STATIC_CAST_EXPR, "static_cast_expr", tcc_unary, 1) |
| DEFTREECODE (DYNAMIC_CAST_EXPR, "dynamic_cast_expr", tcc_unary, 1) |
| DEFTREECODE (IMPLICIT_CONV_EXPR, "implicit_conv_expr", tcc_unary, 1) |
| DEFTREECODE (DOTSTAR_EXPR, "dotstar_expr", tcc_expression, 2) |
| DEFTREECODE (TYPEID_EXPR, "typeid_expr", tcc_expression, 1) |
| DEFTREECODE (NOEXCEPT_EXPR, "noexcept_expr", tcc_unary, 1) |
| DEFTREECODE (SPACESHIP_EXPR, "spaceship_expr", tcc_expression, 2) |
| |
| /* A placeholder for an expression that is not type-dependent, but |
| does occur in a template. When an expression that is not |
| type-dependent appears in a larger expression, we must compute the |
| type of that larger expression. That computation would normally |
| modify the original expression, which would change the mangling of |
| that expression if it appeared in a template argument list. In |
| that situation, we create a NON_DEPENDENT_EXPR to take the place of |
| the original expression. The expression is the only operand -- it |
| is only needed for diagnostics. */ |
| DEFTREECODE (NON_DEPENDENT_EXPR, "non_dependent_expr", tcc_expression, 1) |
| |
| /* CTOR_INITIALIZER is a placeholder in template code for a call to |
| setup_vtbl_pointer (and appears in all functions, not just ctors). */ |
| DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer", tcc_expression, 1) |
| |
| DEFTREECODE (TRY_BLOCK, "try_block", tcc_statement, 2) |
| |
| DEFTREECODE (EH_SPEC_BLOCK, "eh_spec_block", tcc_statement, 2) |
| |
| /* A HANDLER wraps a catch handler for the HANDLER_TYPE. If this is |
| CATCH_ALL_TYPE, then the handler catches all types. The declaration of |
| the catch variable is in HANDLER_PARMS, and the body block in |
| HANDLER_BODY. */ |
| DEFTREECODE (HANDLER, "handler", tcc_statement, 2) |
| |
| /* A MUST_NOT_THROW_EXPR wraps an expression that may not |
| throw, and must call terminate if it does. The second argument |
| is a condition, used in templates to express noexcept (condition). */ |
| DEFTREECODE (MUST_NOT_THROW_EXPR, "must_not_throw_expr", tcc_expression, 2) |
| |
| /* A CLEANUP_STMT marks the point at which a declaration is fully |
| constructed. The CLEANUP_EXPR is run on behalf of CLEANUP_DECL |
| when CLEANUP_BODY completes. */ |
| DEFTREECODE (CLEANUP_STMT, "cleanup_stmt", tcc_statement, 3) |
| |
| /* Represents an 'if' statement. The operands are IF_COND, |
| THEN_CLAUSE, and ELSE_CLAUSE, and the current scope, respectively. */ |
| /* ??? It is currently still necessary to distinguish between IF_STMT |
| and COND_EXPR for the benefit of templates. */ |
| DEFTREECODE (IF_STMT, "if_stmt", tcc_statement, 4) |
| |
| /* Used to represent a range-based `for' statement. The operands are |
| RANGE_FOR_DECL, RANGE_FOR_EXPR, RANGE_FOR_BODY, RANGE_FOR_SCOPE, |
| RANGE_FOR_UNROLL, and RANGE_FOR_INIT_STMT, respectively. Only used in |
| templates. */ |
| DEFTREECODE (RANGE_FOR_STMT, "range_for_stmt", tcc_statement, 6) |
| |
| /* Used to represent an expression statement. Use `EXPR_STMT_EXPR' to |
| obtain the expression. */ |
| DEFTREECODE (EXPR_STMT, "expr_stmt", tcc_expression, 1) |
| |
| DEFTREECODE (TAG_DEFN, "tag_defn", tcc_expression, 0) |
| |
| /* Represents an 'offsetof' expression during template expansion. */ |
| DEFTREECODE (OFFSETOF_EXPR, "offsetof_expr", tcc_expression, 2) |
| |
| /* Represents an '__builtin_addressof' expression during template |
| expansion. This is similar to ADDR_EXPR, but it doesn't invoke |
| overloaded & operators. */ |
| DEFTREECODE (ADDRESSOF_EXPR, "addressof_expr", tcc_expression, 1) |
| |
| /* Represents the -> operator during template expansion. */ |
| DEFTREECODE (ARROW_EXPR, "arrow_expr", tcc_expression, 1) |
| |
| /* Represents an '__alignof__' expression during template |
| expansion. */ |
| DEFTREECODE (ALIGNOF_EXPR, "alignof_expr", tcc_expression, 1) |
| |
| /* Represents an Objective-C++ '@encode' expression during template |
| expansion. */ |
| DEFTREECODE (AT_ENCODE_EXPR, "at_encode_expr", tcc_expression, 1) |
| |
| /* A STMT_EXPR represents a statement-expression during template |
| expansion. This is the GCC extension { ( ... ) }. The |
| STMT_EXPR_STMT is the statement given by the expression. */ |
| DEFTREECODE (STMT_EXPR, "stmt_expr", tcc_expression, 1) |
| |
| /* Unary plus. Operand 0 is the expression to which the unary plus |
| is applied. */ |
| DEFTREECODE (UNARY_PLUS_EXPR, "unary_plus_expr", tcc_unary, 1) |
| |
| /** C++11 extensions. */ |
| |
| /* A static assertion. This is a C++11 extension. |
| STATIC_ASSERT_CONDITION contains the condition that is being |
| checked. STATIC_ASSERT_MESSAGE contains the message (a string |
| literal) to be displayed if the condition fails to hold. */ |
| DEFTREECODE (STATIC_ASSERT, "static_assert", tcc_exceptional, 0) |
| |
| /* Represents an argument pack of types (or templates). An argument |
| pack stores zero or more arguments that will be used to instantiate |
| a parameter pack. |
| |
| ARGUMENT_PACK_ARGS retrieves the arguments stored in the argument |
| pack. |
| |
| Example: |
| template<typename... Values> |
| class tuple { ... }; |
| |
| tuple<int, float, double> t; |
| |
| Values is a (template) parameter pack. When tuple<int, float, |
| double> is instantiated, the Values parameter pack is instantiated |
| with the argument pack <int, float, double>. ARGUMENT_PACK_ARGS will |
| be a TREE_VEC containing int, float, and double. */ |
| DEFTREECODE (TYPE_ARGUMENT_PACK, "type_argument_pack", tcc_type, 0) |
| |
| /* Represents an argument pack of values, which can be used either for |
| non-type template arguments or function call arguments. |
| |
| NONTYPE_ARGUMENT_PACK plays precisely the same role as |
| TYPE_ARGUMENT_PACK, but will be used for packing non-type template |
| arguments (e.g., "int... Dimensions") or function arguments ("const |
| Args&... args"). */ |
| DEFTREECODE (NONTYPE_ARGUMENT_PACK, "nontype_argument_pack", tcc_expression, 1) |
| |
| /* Represents a type expression that will be expanded into a list of |
| types when instantiated with one or more argument packs. |
| |
| PACK_EXPANSION_PATTERN retrieves the expansion pattern. This is |
| the type or expression that we will substitute into with each |
| argument in an argument pack. |
| |
| SET_PACK_EXPANSION_PATTERN sets the expansion pattern. |
| |
| PACK_EXPANSION_PARAMETER_PACKS contains a TREE_LIST of the parameter |
| packs that are used in this pack expansion. |
| |
| Example: |
| template<typename... Values> |
| struct tied : tuple<Values&...> { |
| // ... |
| }; |
| |
| The derivation from tuple contains a TYPE_PACK_EXPANSION for the |
| template arguments. Its PACK_EXPANSION_PATTERN is "Values&" and its |
| PACK_EXPANSION_PARAMETER_PACKS will contain "Values". */ |
| DEFTREECODE (TYPE_PACK_EXPANSION, "type_pack_expansion", tcc_type, 0) |
| |
| /* Represents an expression that will be expanded into a list of |
| expressions when instantiated with one or more argument packs. |
| |
| EXPR_PACK_EXPANSION plays precisely the same role as TYPE_PACK_EXPANSION, |
| but will be used for expressions. */ |
| DEFTREECODE (EXPR_PACK_EXPANSION, "expr_pack_expansion", tcc_expression, 3) |
| |
| /* Selects the Ith parameter out of an argument pack. This node will |
| be used when instantiating pack expansions; see |
| tsubst_pack_expansion. |
| |
| ARGUMENT_PACK_SELECT_FROM_PACK contains the *_ARGUMENT_PACK node |
| from which the argument will be selected. |
| |
| ARGUMENT_PACK_SELECT_INDEX contains the index into the argument |
| pack that will be returned by this ARGUMENT_PACK_SELECT node. The |
| index is a machine integer. */ |
| DEFTREECODE (ARGUMENT_PACK_SELECT, "argument_pack_select", tcc_exceptional, 0) |
| |
| /* Fold expressions allow the expansion of a template argument pack |
| over a binary operator. |
| |
| FOLD_EXPR_MOD_P is true when the fold operation is a compound assignment |
| operator. |
| |
| FOLD_EXPR_OP is an INTEGER_CST storing the tree code for the folded |
| expression. Note that when FOLDEXPR_MOD_P is true, the operator is |
| a compound assignment operator for that kind of expression. |
| |
| FOLD_EXPR_PACK is an expression containing an unexpanded parameter pack; |
| when expanded, each term becomes an argument of the folded expression. |
| |
| In a BINARY_FOLD_EXPRESSION, FOLD_EXPR_INIT is the non-pack argument. */ |
| DEFTREECODE (UNARY_LEFT_FOLD_EXPR, "unary_left_fold_expr", tcc_expression, 2) |
| DEFTREECODE (UNARY_RIGHT_FOLD_EXPR, "unary_right_fold_expr", tcc_expression, 2) |
| DEFTREECODE (BINARY_LEFT_FOLD_EXPR, "binary_left_fold_expr", tcc_expression, 3) |
| DEFTREECODE (BINARY_RIGHT_FOLD_EXPR, "binary_right_fold_expr", tcc_expression, 3) |
| |
| /* Represents the __builtin_bit_cast (type, expr) expression. |
| The type is in TREE_TYPE, expression in TREE_OPERAND (bitcast, 0). */ |
| DEFTREECODE (BIT_CAST_EXPR, "bit_cast_expr", tcc_expression, 1) |
| |
| /** C++ extensions. */ |
| |
| /* Represents a trait expression during template expansion. */ |
| DEFTREECODE (TRAIT_EXPR, "trait_expr", tcc_exceptional, 0) |
| |
| /* A lambda expression. This is a C++0x extension. |
| LAMBDA_EXPR_DEFAULT_CAPTURE_MODE is an enum for the default, which may be |
| none. |
| LAMBDA_EXPR_CAPTURE_LIST holds the capture-list, including `this'. |
| LAMBDA_EXPR_THIS_CAPTURE goes straight to the capture of `this', if it exists. |
| LAMBDA_EXPR_PENDING_PROXIES is a vector of capture proxies which need to |
| be pushed once scope returns to the lambda. |
| LAMBDA_EXPR_MUTABLE_P signals whether this lambda was declared mutable. */ |
| DEFTREECODE (LAMBDA_EXPR, "lambda_expr", tcc_exceptional, 0) |
| |
| /* The declared type of an expression. This is a C++0x extension. |
| DECLTYPE_TYPE_EXPR is the expression whose type we are computing. |
| DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P states whether the |
| expression was parsed as an id-expression or a member access |
| expression. When false, it was parsed as a full expression. |
| DECLTYPE_FOR_LAMBDA_CAPTURE is set if we want lambda capture semantics. |
| DECLTYPE_FOR_LAMBDA_RETURN is set if we want lambda return deduction. */ |
| DEFTREECODE (DECLTYPE_TYPE, "decltype_type", tcc_type, 0) |
| |
| /* A type designated by `__underlying_type (type)'. |
| UNDERLYING_TYPE_TYPE is the type in question. */ |
| DEFTREECODE (UNDERLYING_TYPE, "underlying_type", tcc_type, 0) |
| |
| /* A type designated by one of the bases type traits. |
| BASES_TYPE is the type in question. */ |
| DEFTREECODE (BASES, "bases", tcc_type, 0) |
| |
| /* Used to represent the template information stored by template |
| specializations. |
| The accessors are: |
| TI_TEMPLATE the template declaration associated to the specialization |
| TI_ARGS the arguments of the template specialization |
| TI_TYPEDEFS_NEEDING_ACCESS_CHECKING the vector of typedefs used in |
| the pattern of the template for which access check is needed at template |
| instantiation time. */ |
| DEFTREECODE (TEMPLATE_INFO, "template_info", tcc_exceptional, 0) |
| |
| /* OpenMP - #pragma omp depobj |
| Operand 0: OMP_DEPOBJ_DEPOBJ: Depobj expression |
| Operand 1: OMP_DEPOBJ_CLAUSES: List of clauses. */ |
| DEFTREECODE (OMP_DEPOBJ, "omp_depobj", tcc_statement, 2) |
| |
| /* Extensions for Concepts. */ |
| |
| /* Concept definition. This is not entirely different than a VAR_DECL |
| except that a) it must be a template, and b) doesn't have the wide |
| range of value and linkage options available to variables. */ |
| DEFTREECODE (CONCEPT_DECL, "concept_decl", tcc_declaration, 0) |
| |
| /* Used to represent information associated with constrained declarations. */ |
| DEFTREECODE (CONSTRAINT_INFO, "constraint_info", tcc_exceptional, 0) |
| |
| /* A wildcard declaration is a placeholder for a template parameter |
| used to resolve constrained-type-names in concepts. During |
| resolution, the matching argument is saved as the TREE_TYPE |
| of the wildcard. */ |
| DEFTREECODE (WILDCARD_DECL, "wildcard_decl", tcc_declaration, 0) |
| |
| /* A requires-expr has three operands. The first operand is |
| its parameter list (possibly NULL). The second is a list of |
| requirements, which are denoted by the _REQ* tree codes |
| below. The third is a TREE_VEC of template arguments to |
| be applied when substituting into the parameter list and |
| requirements, set by tsubst_requires_expr for partial instantiations. */ |
| DEFTREECODE (REQUIRES_EXPR, "requires_expr", tcc_expression, 3) |
| |
| /* A requirement for an expression. */ |
| DEFTREECODE (SIMPLE_REQ, "simple_req", tcc_expression, 1) |
| |
| /* A requirement for a type. */ |
| DEFTREECODE (TYPE_REQ, "type_req", tcc_expression, 1) |
| |
| /* A requirement for an expression and its properties. The |
| first operand is the expression, and the 2nd is its type. |
| The accessor COMPOUND_REQ_NOEXCEPT determines whether |
| the noexcept keyword was present. */ |
| DEFTREECODE (COMPOUND_REQ, "compound_req", tcc_expression, 2) |
| |
| /* A requires clause within a requires expression. */ |
| DEFTREECODE (NESTED_REQ, "nested_req", tcc_expression, 1) |
| |
| /* Constraints are modeled as kinds of expressions. |
| The operands of a constraint can be either types or expressions. |
| Unlike expressions, constraints do not have a type. */ |
| |
| /* An atomic constraint evaluates an expression E. The operand of the |
| constraint is its parameter mapping. The actual expression is stored |
| in the context. |
| |
| ATOMIC_CONSTR_INFO provides source info to support diagnostics. |
| ATOMIC_CONSTR_EXPR has the expression to be evaluated. |
| ATOMIC_CONSTR_PARMS is the parameter mapping for the atomic constraint |
| and is stored in the type field. */ |
| DEFTREECODE (ATOMIC_CONSTR, "atomic_constr", tcc_expression, 1) |
| |
| /* The conjunction and disjunction of two constraints, respectively. |
| Operands are accessed using TREE_OPERAND. The third operand provides |
| source info for diagnostics. |
| |
| CONJ_CONSTR_INFO and DISJ_CONSTR_INFO provide access to the source |
| information of constraints, which is stored in the TREE_TYPE. */ |
| DEFTREECODE (CONJ_CONSTR, "conj_constr", tcc_expression, 2) |
| DEFTREECODE (DISJ_CONSTR, "disj_constr", tcc_expression, 2) |
| |
| /* A check constraint represents the checking of a concept |
| C. It has two operands: the template defining the concept |
| and a sequence of template arguments. |
| |
| CHECK_CONSTR_CONCEPT has the concept definition |
| CHECK_CONSTR_ARGUMENTS are the template arguments */ |
| DEFTREECODE (CHECK_CONSTR, "check_constr", tcc_expression, 2) |
| |
| /* The co_await expression is used to support coroutines. |
| |
| Op 0 is the cast expresssion (potentially modified by the |
| promise "await_transform()" method). |
| Op1 is a proxy for the temp / coro frame slot 'e' value. |
| Op2 is the initialiser for Op1 (Op0, potentially modified by any |
| applicable 'co_await' operator). |
| Op3 is a vector of the [0] e.ready, [1] e.suspend and [2] e.resume calls. |
| Op4 is a mode : 0 (await) 1 (yield) 2 (initial) 3 (final) */ |
| DEFTREECODE (CO_AWAIT_EXPR, "co_await", tcc_expression, 5) |
| |
| /* The co_yield expression is used to support coroutines. |
| |
| Op0 is the original expr (for use in diagnostics) |
| Op2 is the co_await derived from this. */ |
| DEFTREECODE (CO_YIELD_EXPR, "co_yield", tcc_expression, 2) |
| |
| /* The co_return expression is used to support coroutines. |
| |
| Op0 is the original expr, can be void (for use in diagnostics) |
| Op1 is the promise return_xxxx call for for the expression given. */ |
| |
| DEFTREECODE (CO_RETURN_EXPR, "co_return", tcc_statement, 2) |
| |
| /* |
| Local variables: |
| mode:c |
| End: |
| */ |