/* 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, 1988, 1990, 1993, 1997, 1998, 2003, 2004, 2005,
- 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007
- Free Software Foundation, Inc.
+ Copyright (C) 1987-2021 Free Software Foundation, Inc.
Hacked by Michael Tiemann (tiemann@cygnus.com)
This file is part of GCC.
TEMPLATE_PARM_INDEX.
It is used without template arguments like TT in C<TT>,
- TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO is NULL_TREE
- and TYPE_NAME is a TEMPLATE_DECL. */
+ 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
/* For template template argument of the form `T::template C'.
TYPE_CONTEXT is `T', the template parameter dependent object.
- TYPE_NAME is an IDENTIFIER_NODE for `C', the member class template. */
+ 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 member using decl, unless DECL_DEPENDENT_P is true,
+ 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_directive", tcc_statement, 1)
+DEFTREECODE (USING_STMT, "using_stmt", tcc_statement, 1)
-/* An un-parsed default argument. Holds a vector of input tokens and
+/* An un-parsed operand. Holds a vector of input tokens and
a vector of places where the argument was instantiated before
- parsing had occurred. */
-DEFTREECODE (DEFAULT_ARG, "default_arg", tcc_exceptional, 0)
+ 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
member template, the template may be an IDENTIFIER_NODE. */
DEFTREECODE (TEMPLATE_ID_EXPR, "template_id_expr", tcc_expression, 2)
-/* A list-like node for chaining overloading candidates. TREE_TYPE is
- the original name, and the parameter is the FUNCTION_DECL. */
+/* 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
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
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. */
-DEFTREECODE (MUST_NOT_THROW_EXPR, "must_not_throw_expr", tcc_expression, 1)
+ 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
DEFTREECODE (CLEANUP_STMT, "cleanup_stmt", tcc_statement, 3)
/* Represents an 'if' statement. The operands are IF_COND,
- THEN_CLAUSE, and ELSE_CLAUSE, respectively. */
+ 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, 3)
-
-/* Used to represent a `for' statement. The operands are
- FOR_INIT_STMT, FOR_COND, FOR_EXPR, and FOR_BODY, respectively. */
-DEFTREECODE (FOR_STMT, "for_stmt", tcc_statement, 4)
+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, respectively. Only used
- in templates. */
-DEFTREECODE (RANGE_FOR_STMT, "range_for_stmt", tcc_statement, 3)
-
-/* Used to represent a 'while' statement. The operands are WHILE_COND
- and WHILE_BODY, respectively. */
-DEFTREECODE (WHILE_STMT, "while_stmt", tcc_statement, 2)
-
-/* Used to represent a 'do' statement. The operands are DO_BODY and
- DO_COND, respectively. */
-DEFTREECODE (DO_STMT, "do_stmt", tcc_statement, 2)
-
-/* Used to represent a 'break' statement. */
-DEFTREECODE (BREAK_STMT, "break_stmt", tcc_statement, 0)
-
-/* Used to represent a 'continue' statement. */
-DEFTREECODE (CONTINUE_STMT, "continue_stmt", tcc_statement, 0)
-
-/* Used to represent a 'switch' statement. The operands are
- SWITCH_STMT_COND, SWITCH_STMT_BODY and SWITCH_STMT_TYPE, respectively. */
-DEFTREECODE (SWITCH_STMT, "switch_stmt", tcc_statement, 3)
+ 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 (TAG_DEFN, "tag_defn", tcc_expression, 0)
/* Represents an 'offsetof' expression during template expansion. */
-DEFTREECODE (OFFSETOF_EXPR, "offsetof_expr", tcc_expression, 1)
+DEFTREECODE (OFFSETOF_EXPR, "offsetof_expr", tcc_expression, 2)
-/* Represents a 'sizeof' expression during template expansion. */
-DEFTREECODE (SIZEOF_EXPR, "sizeof_expr", tcc_expression, 1)
+/* 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)
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. */
is applied. */
DEFTREECODE (UNARY_PLUS_EXPR, "unary_plus_expr", tcc_unary, 1)
-/** C++0x extensions. */
+/** C++11 extensions. */
-/* A static assertion. This is a C++0x extension.
+/* 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. */
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, 1)
+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
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. */
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_MUTABLE_P signals whether this lambda was declared mutable.
- LAMBDA_EXPR_RETURN_TYPE holds the return type, if it was specified. */
+ 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_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:
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
git://gcc.gnu.org / gcc.git / blobdiff