gcc/c-family/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, 2010
   6    Free Software Foundation, Inc.
   7    Written by Benjamin Chelf <chelf@codesourcery.com>
   8
   9 This file is part of GCC.
  10
  11 GCC is free software; you can redistribute it and/or modify it under
  12 the terms of the GNU General Public License as published by the Free
  13 Software Foundation; either version 3, or (at your option) any later
  14 version.
  15
  16 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  17 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19 for more details.
  20
  21 You should have received a copy of the GNU General Public License
  22 along with GCC; see the file COPYING3.  If not see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25 /* Tree nodes used in the C frontend.  These are also shared with the
  26    C++ and Objective C frontends.  */
  27
  28 /* A C_MAYBE_CONST_EXPR, currently only used for C and Objective C,
  29    tracks information about constancy of an expression and VLA type
  30    sizes or VM expressions from typeof that need to be evaluated
  31    before the main expression.  It is used during parsing and removed
  32    in c_fully_fold.  C_MAYBE_CONST_EXPR_PRE is the expression to
  33    evaluate first, if not NULL; C_MAYBE_CONST_EXPR_EXPR is the main
  34    expression.  If C_MAYBE_CONST_EXPR_INT_OPERANDS is set then the
  35    expression may be used in an unevaluated part of an integer
  36    constant expression, but not in an evaluated part.  If
  37    C_MAYBE_CONST_EXPR_NON_CONST is set then the expression contains
  38    something that cannot occur in an evaluated part of a constant
  39    expression (or outside of sizeof in C90 mode); otherwise it does
  40    not.  */
  41 DEFTREECODE (C_MAYBE_CONST_EXPR, "c_maybe_const_expr", tcc_expression, 2)
  42
  43 /* An EXCESS_PRECISION_EXPR, currently only used for C and Objective
  44    C, represents an expression evaluated in greater range or precision
  45    than its type.  The type of the EXCESS_PRECISION_EXPR is the
  46    semantic type while the operand represents what is actually being
  47    evaluated.  */
  48 DEFTREECODE (EXCESS_PRECISION_EXPR, "excess_precision_expr", tcc_expression, 1)
  49
  50 /*
  51 Local variables:
  52 mode:c
  53 End:
  54 */