1 /* ScummVM - Graphic Adventure Engine 2 * 3 * ScummVM is the legal property of its developers, whose names 4 * are too numerous to list here. Please refer to the COPYRIGHT 5 * file distributed with this source distribution. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 2 10 * of the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 20 * 21 */ 22 23 #ifndef ARCHETYPE_EXPRESSION 24 #define ARCHETYPE_EXPRESSION 25 26 #include "glk/archetype/keywords.h" 27 #include "glk/archetype/linked_list.h" 28 #include "glk/archetype/misc.h" 29 30 namespace Glk { 31 namespace Archetype { 32 33 const int OP_LPAREN = NUM_OPERS + 1; // book-keeping operator 34 const int OP_SEND_TO_TYPE = NUM_OPERS + 2; // for use with interpreter 35 36 struct ExprNode; 37 38 struct OperNode { 39 int8 op_name; 40 ExprNode *left, *right; 41 }; 42 43 struct MessageTextQuoteNode { 44 int index; 45 }; 46 47 struct NumericNode { 48 int acl_int; 49 }; 50 51 struct StrNode { 52 StringPtr acl_str; 53 }; 54 55 struct AttrNode { 56 NodePtr acl_attr; 57 }; 58 59 struct ReservedNode { 60 int8 keyword; 61 }; 62 63 struct IdentNode { 64 ClassifyType ident_kind; 65 int ident_int; 66 }; 67 68 union ExprNodeData { 69 OperNode _oper; 70 NumericNode _numeric; 71 MessageTextQuoteNode _msgTextQuote; 72 StrNode _str; 73 AttrNode _attr; 74 ReservedNode _reserved; 75 IdentNode _ident; 76 }; 77 78 struct ExprNode { 79 AclType _kind; 80 ExprNodeData _data; 81 ExprNodeExprNode82 ExprNode() : _kind(RESERVED) { 83 _data._reserved.keyword = RW_UNDEFINED; 84 } 85 }; 86 87 typedef ExprNode *ExprPtr; 88 typedef ExprPtr ExprTree; 89 90 // Global variables 91 extern bool Right_Assoc[NUM_OPERS + 2]; 92 extern bool Binary[NUM_OPERS + 2]; 93 extern int8 Precedence[NUM_OPERS + 2]; 94 95 extern void expression_init(); 96 97 } // End of namespace Archetype 98 } // End of namespace Glk 99 100 #endif 101