1/* Copyright (C) 2021 Free Software Foundation, Inc. 2 Contributed by Oracle. 3 4 This file is part of GNU Binutils. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21#ifndef _QLPARSER_H 22#define _QLPARSER_H 23 24#include <sstream> 25#include <istream> 26#include <iostream> 27#include "Expression.h" 28 29/* This class contains parser inputs (a string, if non-NULL: if NULL, use cin), 30 and outputs (obtained via operator(), which resets the output 31 expression). The destructor deletes the returned expression to allow 32 exception throws on syntax error to clean up properly. */ 33 34namespace QL 35{ 36 struct Result 37 { 38 std::stringstream streamify; 39 public: 40 std::istream in; 41 Expression *out; 42 43 Result () : in (std::cin.rdbuf ()), out (NULL) { } 44 Result (const char *instr) : streamify (std::string (instr)), 45 in (streamify.rdbuf ()), out (NULL) { } 46 47 Expression *operator() () 48 { 49 Expression *o = out; 50 out = NULL; 51 return o; 52 } 53 54 ~Result () 55 { 56 delete out; 57 } 58 }; 59}; 60 61#endif /* _QLPARSER_H */ 62