241 lines
9.8 KiB
Modula-2
241 lines
9.8 KiB
Modula-2
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/* This file contains the definitions and documentation for the
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additional tree codes used in the GNU C++ compiler (see tree.def
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for the standard codes).
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Copyright (C) 1987, 1988, 1990, 1993 Free Software Foundation, Inc.
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Hacked by Michael Tiemann (tiemann@cygnus.com)
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* Reference to the contents of an offset
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(a value whose type is an OFFSET_TYPE).
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Operand 0 is the object within which the offset is taken.
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Operand 1 is the offset. The language independent OFFSET_REF
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just won't work for us. */
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DEFTREECODE (OFFSET_REF, "offset_ref", 'r', 2)
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/* For NEW_EXPR, operand 0 is the placement list.
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Operand 1 is the new-declarator.
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Operand 2 is the initializer. */
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DEFTREECODE (NEW_EXPR, "nw_expr", 'e', 3)
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DEFTREECODE (VEC_NEW_EXPR, "vec_nw_expr", 'e', 3)
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/* For DELETE_EXPR, operand 0 is the store to be destroyed.
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Operand 1 is the value to pass to the destroying function
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saying whether the store should be deallocated as well. */
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DEFTREECODE (DELETE_EXPR, "dl_expr", 'e', 2)
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DEFTREECODE (VEC_DELETE_EXPR, "vec_dl_expr", 'e', 2)
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/* Value is reference to particular overloaded class method.
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Operand 0 is the class name (an IDENTIFIER_NODE);
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operand 1 is the field (also an IDENTIFIER_NODE).
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The COMPLEXITY field holds the class level (usually 0). */
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DEFTREECODE (SCOPE_REF, "scope_ref", 'r', 2)
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/* When composing an object with a member, this is the result.
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Operand 0 is the object. Operand 1 is the member (usually
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a dereferenced pointer to member). */
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DEFTREECODE (MEMBER_REF, "member_ref", 'r', 2)
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/* Type conversion operator in C++. TREE_TYPE is type that this
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operator converts to. Operand is expression to be converted. */
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DEFTREECODE (TYPE_EXPR, "type_expr", 'e', 1)
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/* For AGGR_INIT_EXPR, operand 0 is function which performs initialization,
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operand 1 is argument list to initialization function,
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and operand 2 is the slot which was allocated for this expression. */
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DEFTREECODE (AGGR_INIT_EXPR, "aggr_init_expr", 'e', 3)
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/* A throw expression. operand 0 is the expression, if there was one,
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else it is NULL_TREE. */
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DEFTREECODE (THROW_EXPR, "throw_expr", 'e', 1)
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/* Initialization of a vector, used in build_new. Operand 0 is the target
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of the initialization, operand 1 is the initializer, and operand 2 is
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the number of elements. */
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DEFTREECODE (VEC_INIT_EXPR, "vec_init_expr", 'e', 3)
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/* Template definition. The following fields have the specified uses,
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although there are other macros in cp-tree.h that should be used for
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accessing this data.
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DECL_ARGUMENTS template parm vector
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DECL_TEMPLATE_INFO template text &c
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DECL_VINDEX list of instantiations already produced;
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only done for functions so far
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For class template:
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DECL_INITIAL associated templates (methods &c)
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DECL_RESULT null
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For non-class templates:
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TREE_TYPE type of object to be constructed
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DECL_RESULT decl for object to be created
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(e.g., FUNCTION_DECL with tmpl parms used)
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*/
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DEFTREECODE (TEMPLATE_DECL, "template_decl", 'd', 0)
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/* Index into a template parameter list. The TEMPLATE_PARM_IDX gives
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the index (from 0) of the parameter, while the TEMPLATE_PARM_LEVEL
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gives the level (from 1) of the parameter.
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Here's an example:
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template <class T> // Index 0, Level 1.
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struct S
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{
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template <class U, // Index 0, Level 2.
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class V> // Index 1, Level 2.
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void f();
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};
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The DESCENDANTS will be a chain of TEMPLATE_PARM_INDEXs descended
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from this one. The first descendant will have the same IDX, but
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its LEVEL will be one less. The TREE_CHAIN field is used to chain
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together the descendants. The TEMPLATE_PARM_DECL is the
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declaration of this parameter, either a TYPE_DECL or CONST_DECL.
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The TEMPLATE_PARM_ORIG_LEVEL is the LEVEL of the most distant
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parent, i.e., the LEVEL that the parameter originally had when it
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was declared. For example, if we instantiate S<int>, we will have:
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struct S<int>
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{
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template <class U, // Index 0, Level 1, Orig Level 2
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class V> // Index 1, Level 1, Orig Level 2
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void f();
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};
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The LEVEL is the level of the parameter when we are worrying about
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the types of things; the ORIG_LEVEL is the level when we are
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worrying about instantiating things. */
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DEFTREECODE (TEMPLATE_PARM_INDEX, "template_parm_index", 'x',
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/* The addition of (sizeof(char*) - 1) in the next
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expression is to ensure against the case where
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sizeof(char*) does not evenly divide
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sizeof(HOST_WIDE_INT). */
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2 + ((3 * sizeof (HOST_WIDE_INT) + sizeof(char*) - 1)
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/ sizeof (char*)))
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/* Index into a template parameter list. This parameter must be a type.
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The TYPE_FIELDS value will be a TEMPLATE_PARM_INDEX. */
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DEFTREECODE (TEMPLATE_TYPE_PARM, "template_type_parm", 't', 0)
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/* Index into a template parameter list. This parameter must be a type.
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If it is used in signature of a template, TEMPLATE_INFO is NULL_TREE.
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Otherwise it is used to declare a type like TT<int>.
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The TYPE_FIELDS value will be a TEMPLATE_PARM_INDEX. */
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DEFTREECODE (TEMPLATE_TEMPLATE_PARM, "template_template_parm", 't', 0)
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/* A type designated by 'typename T::t'. */
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DEFTREECODE (TYPENAME_TYPE, "typename_type", 't', 0)
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/* A thunk is a stub function.
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Thunks are used to implement multiple inheritance:
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At run-time, such a thunk subtracts THUNK_DELTA (an int, not a tree)
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from the this pointer, and then jumps to DECL_INITIAL
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(which is an ADDR_EXPR whose operand is a FUNCTION_DECL).
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Other kinds of thunks may be defined later. */
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DEFTREECODE (THUNK_DECL, "thunk_decl", 'd', 0)
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/* A using declaration. DECL_INITIAL contains the specified scope.
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This is not an alias, but is later expanded into multiple aliases. */
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DEFTREECODE (USING_DECL, "using_decl", 'd', 0)
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/* An un-parsed default argument. Looks like an IDENTIFIER_NODE. */
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DEFTREECODE (DEFAULT_ARG, "default_arg", 'c', 2)
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/* A template-id, like foo<int>. The first operand is the template.
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The second is the list of explicitly specified arguments. The
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template will be a FUNCTION_DECL, TEMPLATE_DECL, or a list of
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overloaded functions and templates if the template-id refers to
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a global template. If the template-id refers to a member template,
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the template may be an IDENTIFIER_NODE. */
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DEFTREECODE (TEMPLATE_ID_EXPR, "template_id_expr", 'e', 2)
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/* An association between namespace and entity. Parameters are the
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scope and the (non-type) value.
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TREE_TYPE indicates the type bound to the name. */
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DEFTREECODE (CPLUS_BINDING, "binding", 'x', 2)
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/* A list-like node for chaining overloading candidates. TREE_TYPE is
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the original name, and the parameter is the FUNCTION_DECL. */
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DEFTREECODE (OVERLOAD, "overload", 'x', 1)
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/* A generic wrapper for something not tree that we want to include in
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tree structure. */
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DEFTREECODE (WRAPPER, "wrapper", 'x', 1)
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/* A node to remember a source position. */
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DEFTREECODE (SRCLOC, "srcloc", 'x', 2)
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/* A whole bunch of tree codes for the initial, superficial parsing of
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templates. */
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DEFTREECODE (LOOKUP_EXPR, "lookup_expr", 'e', 2)
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DEFTREECODE (MODOP_EXPR, "modop_expr", 'e', 3)
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DEFTREECODE (CAST_EXPR, "cast_expr", '1', 1)
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DEFTREECODE (REINTERPRET_CAST_EXPR, "reinterpret_cast_expr", '1', 1)
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DEFTREECODE (CONST_CAST_EXPR, "const_cast_expr", '1', 1)
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DEFTREECODE (STATIC_CAST_EXPR, "static_cast_expr", '1', 1)
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DEFTREECODE (DYNAMIC_CAST_EXPR, "dynamic_cast_expr", '1', 1)
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DEFTREECODE (SIZEOF_EXPR, "sizeof_expr", '1', 1)
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DEFTREECODE (ALIGNOF_EXPR, "alignof_expr", '1', 1)
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DEFTREECODE (ARROW_EXPR, "arrow_expr", 'e', 1)
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DEFTREECODE (DOTSTAR_EXPR, "dotstar_expr", 'e', 2)
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DEFTREECODE (TYPEID_EXPR, "typeid_expr", 'e', 1)
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DEFTREECODE (EXPR_STMT, "expr_stmt", 'e', 1)
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DEFTREECODE (COMPOUND_STMT, "compound_stmt", 'e', 1)
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DEFTREECODE (DECL_STMT, "decl_stmt", 'e', 3)
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DEFTREECODE (IF_STMT, "if_stmt", 'e', 3)
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DEFTREECODE (FOR_STMT, "for_stmt", 'e', 4)
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DEFTREECODE (WHILE_STMT, "while_stmt", 'e', 2)
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DEFTREECODE (DO_STMT, "do_stmt", 'e', 2)
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DEFTREECODE (RETURN_STMT, "return_stmt", 'e', 1)
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DEFTREECODE (BREAK_STMT, "break_stmt", 'e', 0)
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DEFTREECODE (CONTINUE_STMT, "continue_stmt", 'e', 0)
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DEFTREECODE (SWITCH_STMT, "switch_stmt", 'e', 2)
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DEFTREECODE (GOTO_STMT, "goto_stmt", 'e', 1)
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DEFTREECODE (ASM_STMT, "asm_stmt", 'e', 5)
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DEFTREECODE (CTOR_INITIALIZER, "ctor_initializer", 'e', 2)
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DEFTREECODE (CASE_LABEL, "case_label", 'e', 2)
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DEFTREECODE (RETURN_INIT, "return_init", 'e', 2)
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DEFTREECODE (TRY_BLOCK, "try_stmt", 'e', 2)
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DEFTREECODE (HANDLER, "catch_stmt", 'e', 2)
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DEFTREECODE (TAG_DEFN, "tag_defn", 'e', 0)
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/* And some codes for expressing conversions for overload resolution. */
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DEFTREECODE (IDENTITY_CONV, "identity_conv", 'e', 1)
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DEFTREECODE (LVALUE_CONV, "lvalue_conv", 'e', 1)
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DEFTREECODE (QUAL_CONV, "qual_conv", 'e', 1)
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DEFTREECODE (STD_CONV, "std_conv", 'e', 1)
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DEFTREECODE (PTR_CONV, "ptr_conv", 'e', 1)
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DEFTREECODE (PMEM_CONV, "pmem_conv", 'e', 1)
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DEFTREECODE (BASE_CONV, "base_conv", 'e', 1)
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DEFTREECODE (REF_BIND, "ref_bind", 'e', 1)
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DEFTREECODE (USER_CONV, "user_conv", 'e', 2)
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DEFTREECODE (AMBIG_CONV, "ambig_conv", 'e', 1)
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DEFTREECODE (RVALUE_CONV, "rvalue_conv", 'e', 1)
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/*
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Local variables:
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mode:c
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End:
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*/
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