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) 1987-2017 Free Software Foundation, Inc.
5 Written by Benjamin Chelf <chelf@codesourcery.com>
7This file is part of GCC.
9GCC is free software; you can redistribute it and/or modify it under
10the terms of the GNU General Public License as published by the Free
11Software Foundation; either version 3, or (at your option) any later
14GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15WARRANTY; without even the implied warranty of MERCHANTABILITY or
16FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17for more details.
19You should have received a copy of the GNU General Public License
20along with GCC; see the file COPYING3. If not see
21<http://www.gnu.org/licenses/>. */
23/* Tree nodes used in the C frontend. These are also shared with the
24 C++ and Objective C frontends. */
26/* A C_MAYBE_CONST_EXPR, currently only used for C and Objective C,
27 tracks information about constancy of an expression and VLA type
28 sizes or VM expressions from typeof that need to be evaluated
29 before the main expression. It is used during parsing and removed
30 in c_fully_fold. C_MAYBE_CONST_EXPR_PRE is the expression to
31 evaluate first, if not NULL; C_MAYBE_CONST_EXPR_EXPR is the main
32 expression. If C_MAYBE_CONST_EXPR_INT_OPERANDS is set then the
33 expression may be used in an unevaluated part of an integer
34 constant expression, but not in an evaluated part. If
35 C_MAYBE_CONST_EXPR_NON_CONST is set then the expression contains
36 something that cannot occur in an evaluated part of a constant
37 expression (or outside of sizeof in C90 mode); otherwise it does
38 not. */
39DEFTREECODE (C_MAYBE_CONST_EXPR, "c_maybe_const_expr", tcc_expression, 2)
41/* An EXCESS_PRECISION_EXPR, currently only used for C and Objective
42 C, represents an expression evaluated in greater range or precision
43 than its type. The type of the EXCESS_PRECISION_EXPR is the
44 semantic type while the operand represents what is actually being
45 evaluated. */
46DEFTREECODE (EXCESS_PRECISION_EXPR, "excess_precision_expr", tcc_expression, 1)
48/* Used to represent a user-defined literal.
49 The operands are an IDENTIFIER for the suffix, the VALUE of the literal,
50 and for numeric literals the original string representation of the
51 number. */
52DEFTREECODE (USERDEF_LITERAL, "userdef_literal", tcc_exceptional, 3)
54/* Represents a 'sizeof' expression during C++ template expansion,
55 or for the purpose of -Wsizeof-pointer-memaccess warning. */
56DEFTREECODE (SIZEOF_EXPR, "sizeof_expr", tcc_expression, 1)
59Local variables: