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 9This file is part of GCC. 10 11GCC is free software; you can redistribute it and/or modify it under 12the terms of the GNU General Public License as published by the Free 13Software Foundation; either version 3, or (at your option) any later 14version. 15 16GCC is distributed in the hope that it will be useful, but WITHOUT ANY 17WARRANTY; without even the implied warranty of MERCHANTABILITY or 18FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 19for more details. 20 21You should have received a copy of the GNU General Public License 22along 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. */ 41DEFTREECODE (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. */ 48DEFTREECODE (EXCESS_PRECISION_EXPR, "excess_precision_expr", tcc_expression, 1) 49 50/* Used to represent a user-defined literal. 51 The operands are an IDENTIFIER for the suffix, the VALUE of the literal, 52 and for numeric literals the original string representation of the 53 number. */ 54DEFTREECODE (USERDEF_LITERAL, "userdef_literal", tcc_exceptional, 3) 55 56/* 57Local variables: 58mode:c 59End: 60*/ 61