gcc/c-common.def

   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, 1988, 1990, 1993, 1997, 1998,
   5    1999, 2000, 2001, 2004, 2005, 2007, 2009 Free Software Foundation, Inc.
   6    Written by Benjamin Chelf <chelf@codesourcery.com>
   7
   8 This file is part of GCC.
   9
  10 GCC is free software; you can redistribute it and/or modify it under
  11 the terms of the GNU General Public License as published by the Free
  12 Software Foundation; either version 3, or (at your option) any later
  13 version.
  14
  15 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  16 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  18 for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with GCC; see the file COPYING3.  If not see
  22 <http://www.gnu.org/licenses/>.  */
  23
  24 /* Tree nodes used in the C frontend.  These are also shared with the
  25    C++ and Objective C frontends.  */
  26
  27 /* A C_MAYBE_CONST_EXPR, currently only used for C and Objective C,
  28    tracks information about constancy of an expression and VLA type
  29    sizes or VM expressions from typeof that need to be evaluated
  30    before the main expression.  It is used during parsing and removed
  31    in c_fully_fold.  C_MAYBE_CONST_EXPR_PRE is the expression to
  32    evaluate first, if not NULL; C_MAYBE_CONST_EXPR_EXPR is the main
  33    expression.  If C_MAYBE_CONST_EXPR_INT_OPERANDS is set then the
  34    expression may be used in an unevaluated part of an integer
  35    constant expression, but not in an evaluated part.  If
  36    C_MAYBE_CONST_EXPR_NON_CONST is set then the expression contains
  37    something that cannot occur in an evaluated part of a constant
  38    expression (or outside of sizeof in C90 mode); otherwise it does
  39    not.  */
  40 DEFTREECODE (C_MAYBE_CONST_EXPR, "c_maybe_const_expr", tcc_expression, 2)
  41
  42 /* An EXCESS_PRECISION_EXPR, currently only used for C and Objective
  43    C, represents an expression evaluated in greater range or precision
  44    than its type.  The type of the EXCESS_PRECISION_EXPR is the
  45    semantic type while the operand represents what is actually being
  46    evaluated.  */
  47 DEFTREECODE (EXCESS_PRECISION_EXPR, "excess_precision_expr", tcc_expression, 1)
  48
  49 /*
  50 Local variables:
  51 mode:c
  52 End:
  53 */