274 lines
12 KiB
Modula-2
274 lines
12 KiB
Modula-2
/* 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,
|
|
1999, 2000, 2001 Free Software Foundation, Inc.
|
|
Hacked by Michael Tiemann (tiemann@cygnus.com)
|
|
|
|
This file is part of GNU CC.
|
|
|
|
GNU CC 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 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU CC 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 GNU CC; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
|
|
/* Reference to the contents of an offset
|
|
(a value whose type is an OFFSET_TYPE).
|
|
Operand 0 is the object within which the offset is taken.
|
|
Operand 1 is the offset. The language independent OFFSET_REF
|
|
just won't work for us. */
|
|
DEFTREECODE (OFFSET_REF, "offset_ref", 'r', 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", 'c', 2)
|
|
|
|
/* For NEW_EXPR, operand 0 is the placement list.
|
|
Operand 1 is the new-declarator.
|
|
Operand 2 is the initializer. */
|
|
DEFTREECODE (NEW_EXPR, "nw_expr", 'e', 3)
|
|
DEFTREECODE (VEC_NEW_EXPR, "vec_nw_expr", 'e', 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", 'e', 2)
|
|
DEFTREECODE (VEC_DELETE_EXPR, "vec_dl_expr", 'e', 2)
|
|
|
|
/* Value is reference to particular overloaded class method.
|
|
Operand 0 is the class name (an IDENTIFIER_NODE);
|
|
operand 1 is the field (also an IDENTIFIER_NODE).
|
|
The COMPLEXITY field holds the class level (usually 0). */
|
|
DEFTREECODE (SCOPE_REF, "scope_ref", 'r', 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", 'r', 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", 'e', 1)
|
|
|
|
/* For AGGR_INIT_EXPR, operand 0 is function which performs initialization,
|
|
operand 1 is argument list to initialization function,
|
|
and operand 2 is the slot which was allocated for this expression. */
|
|
DEFTREECODE (AGGR_INIT_EXPR, "aggr_init_expr", 'e', 3)
|
|
|
|
/* A throw expression. operand 0 is the expression, if there was one,
|
|
else it is NULL_TREE. */
|
|
DEFTREECODE (THROW_EXPR, "throw_expr", 'e', 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", 'e', 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", 'd', 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", 'x',
|
|
/* The addition of (sizeof(tree) - 1) in the next expression
|
|
is to handle the case when padding pushes us past an even
|
|
multiple of sizeof(tree). */
|
|
/* We used to try to calculate this using
|
|
1+3*sizeof(HOST_WIDE_INT), but that fails if alignment
|
|
makes it bigger. */
|
|
((sizeof (template_parm_index) - sizeof (struct tree_common))
|
|
+ sizeof (tree) - 1)
|
|
/ sizeof (tree))
|
|
|
|
/* Index into a template parameter list. This parameter must be a type.
|
|
The TYPE_FIELDS value will be a TEMPLATE_PARM_INDEX. */
|
|
DEFTREECODE (TEMPLATE_TYPE_PARM, "template_type_parm", 't', 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>,
|
|
TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO is NULL_TREE
|
|
and TYPE_NAME is a TEMPLATE_DECL. */
|
|
DEFTREECODE (TEMPLATE_TEMPLATE_PARM, "template_template_parm", 't', 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", 't', 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.
|
|
If TREE_TYPE is present, this type was generated by the implicit
|
|
typename extension, and the TREE_TYPE is a _TYPE from a baseclass
|
|
of `T'. */
|
|
DEFTREECODE (TYPENAME_TYPE, "typename_type", 't', 0)
|
|
|
|
/* 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. */
|
|
DEFTREECODE (UNBOUND_CLASS_TEMPLATE, "unbound_class_template", 't', 0)
|
|
|
|
/* A type designated by `__typeof (expr)'. TYPE_FIELDS is the
|
|
expression in question. */
|
|
DEFTREECODE (TYPEOF_TYPE, "typeof_type", 't', 0)
|
|
|
|
/* A using declaration. DECL_INITIAL contains the specified scope.
|
|
This is not an alias, but is later expanded into multiple aliases. */
|
|
DEFTREECODE (USING_DECL, "using_decl", 'd', 0)
|
|
|
|
/* A using directive. The operand is USING_STMT_NAMESPACE. */
|
|
DEFTREECODE (USING_STMT, "using_directive", 'e', 1)
|
|
|
|
/* An un-parsed default argument. Looks like an IDENTIFIER_NODE. */
|
|
DEFTREECODE (DEFAULT_ARG, "default_arg", 'x', 2)
|
|
|
|
/* A template-id, like foo<int>. The first operand is the template.
|
|
The second is the TREE_LIST or TREE_VEC of explicitly specified
|
|
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", 'e', 2)
|
|
|
|
/* An association between name and entity. Parameters are the scope
|
|
and the (non-type) value. TREE_TYPE indicates the type bound to
|
|
the name. */
|
|
DEFTREECODE (CPLUS_BINDING, "binding", 'x', 2)
|
|
|
|
/* A list-like node for chaining overloading candidates. TREE_TYPE is
|
|
the original name, and the parameter is the FUNCTION_DECL. */
|
|
DEFTREECODE (OVERLOAD, "overload", 'x', 1)
|
|
|
|
/* A generic wrapper for something not tree that we want to include in
|
|
tree structure. */
|
|
DEFTREECODE (WRAPPER, "wrapper", 'x', 1)
|
|
|
|
/* Used to represent deferred name lookup for dependent names while
|
|
parsing a template declaration. The first argument is an
|
|
IDENTIFIER_NODE for the name in question. The TREE_TYPE is
|
|
unused. */
|
|
DEFTREECODE (LOOKUP_EXPR, "lookup_expr", 'e', 1)
|
|
|
|
/* A whole bunch of tree codes for the initial, superficial parsing of
|
|
templates. */
|
|
DEFTREECODE (MODOP_EXPR, "modop_expr", 'e', 3)
|
|
DEFTREECODE (CAST_EXPR, "cast_expr", '1', 1)
|
|
DEFTREECODE (REINTERPRET_CAST_EXPR, "reinterpret_cast_expr", '1', 1)
|
|
DEFTREECODE (CONST_CAST_EXPR, "const_cast_expr", '1', 1)
|
|
DEFTREECODE (STATIC_CAST_EXPR, "static_cast_expr", '1', 1)
|
|
DEFTREECODE (DYNAMIC_CAST_EXPR, "dynamic_cast_expr", '1', 1)
|
|
DEFTREECODE (DOTSTAR_EXPR, "dotstar_expr", 'e', 2)
|
|
DEFTREECODE (TYPEID_EXPR, "typeid_expr", 'e', 1)
|
|
DEFTREECODE (PSEUDO_DTOR_EXPR, "pseudo_dtor_expr", 'e', 3)
|
|
|
|
/* A SUBOBJECT statement marks the point at which a sub-object is
|
|
fully constructed. After this point, the SUBOBJECT_CLEANUP must be
|
|
run if an exception is thrown before the end of the enclosing
|
|
function. */
|
|
DEFTREECODE (SUBOBJECT, "subobject", 'e', 1)
|
|
/* An CTOR_STMT marks the beginning (if CTOR_BEGIN_P holds) or end of
|
|
a constructor (if CTOR_END_P) holds. At the end of a constructor,
|
|
the cleanups associated with any SUBOBJECT_CLEANUPS need no longer
|
|
be run. */
|
|
DEFTREECODE (CTOR_STMT, "ctor_stmt", 'e', 0)
|
|
/* A CLEANUP_STMT marks the point at which a declaration is fully
|
|
constructed. If, after this point, the CLEANUP_DECL goes out of
|
|
scope, the CLEANUP_EXPR must be run. */
|
|
DEFTREECODE (CLEANUP_STMT, "cleanup_stmt", 'e', 2)
|
|
/* 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", 'e', 2)
|
|
DEFTREECODE (RETURN_INIT, "return_init", 'e', 2)
|
|
DEFTREECODE (TRY_BLOCK, "try_block", 'e', 2)
|
|
DEFTREECODE (EH_SPEC_BLOCK, "eh_spec_block", 'e', 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", 'e', 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", 'e', 1)
|
|
|
|
DEFTREECODE (TAG_DEFN, "tag_defn", 'e', 0)
|
|
|
|
/* And some codes for expressing conversions for overload resolution. */
|
|
|
|
DEFTREECODE (IDENTITY_CONV, "identity_conv", 'e', 1)
|
|
DEFTREECODE (LVALUE_CONV, "lvalue_conv", 'e', 1)
|
|
DEFTREECODE (QUAL_CONV, "qual_conv", 'e', 1)
|
|
DEFTREECODE (STD_CONV, "std_conv", 'e', 1)
|
|
DEFTREECODE (PTR_CONV, "ptr_conv", 'e', 1)
|
|
DEFTREECODE (PMEM_CONV, "pmem_conv", 'e', 1)
|
|
DEFTREECODE (BASE_CONV, "base_conv", 'e', 1)
|
|
DEFTREECODE (REF_BIND, "ref_bind", 'e', 1)
|
|
DEFTREECODE (USER_CONV, "user_conv", 'e', 2)
|
|
DEFTREECODE (AMBIG_CONV, "ambig_conv", 'e', 1)
|
|
DEFTREECODE (RVALUE_CONV, "rvalue_conv", 'e', 1)
|
|
|
|
/*
|
|
Local variables:
|
|
mode:c
|
|
End:
|
|
*/
|