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Add basic syntax for typecasting Add parser support for type casts. This current scheme handles only integer types. Also include parenthesis grouping in expressions.
author William Astle <lost@l-w.ca>
date Sun, 27 Oct 2019 12:06:01 -0600
parents 14a40f8bb4eb
children
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1 /*
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2 lwcc/tree.h
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3
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4 Copyright © 2013 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
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22 #ifndef tree_h_seen___
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23 #define tree_h_seen___
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24
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25 #include <stdio.h>
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26
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27 /* the various node types */
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28 #define NODE_NONE 0 // a node with no type
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29 #define NODE_PROGRAM 1 // the whole program
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30 #define NODE_DECL 2 // a declaration
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31 #define NODE_TYPE_CHAR 3 // a character type
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32 #define NODE_TYPE_SHORT 4 // short int
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33 #define NODE_TYPE_INT 5 // integer
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34 #define NODE_TYPE_LONG 6 // long int
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35 #define NODE_TYPE_LONGLONG 7 // long long
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36 #define NODE_IDENT 8 // an identifier of some kind
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37 #define NODE_TYPE_PTR 9 // a pointer
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38 #define NODE_TYPE_SCHAR 10 // signed char
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39 #define NODE_TYPE_UCHAR 11 // unsigned char
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40 #define NODE_TYPE_USHORT 12 // unsigned short
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41 #define NODE_TYPE_UINT 13 // unsigned int
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42 #define NODE_TYPE_ULONG 14 // unsigned long
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43 #define NODE_TYPE_ULONGLONG 15 // unsigned long long
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44 #define NODE_TYPE_VOID 16 // void
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45 #define NODE_TYPE_FLOAT 17 // float
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46 #define NODE_TYPE_DOUBLE 18 // double
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47 #define NODE_TYPE_LDOUBLE 19 // long double
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48 #define NODE_FUNDEF 20 // function definition
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49 #define NODE_FUNDECL 21 // function declaration
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50 #define NODE_FUNARGS 22 // list of function args
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51 #define NODE_BLOCK 23 // statement block
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52 #define NODE_STMT_RETURN 24 // return statement
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53 #define NODE_CONST_INT 25 // constant integer
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54 #define NODE_OPER_PLUS 26 // addition
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55 #define NODE_OPER_MINUS 27 // subtraction
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56 #define NODE_OPER_TIMES 28 // multiplcation
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57 #define NODE_OPER_DIVIDE 29 // division
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58 #define NODE_OPER_MOD 30 // modulus
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59 #define NODE_OPER_COND 31 // ternary conditional
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60 #define NODE_OPER_FNCALL 32 // function call
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61 #define NODE_OPER_SUBSCRIPT 33 // array subscript
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62 #define NODE_OPER_POSTINC 34 // post increment
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63 #define NODE_OPER_POSTDEC 35 // post decrement
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64 #define NODE_OPER_PTRMEM 36 // member of pointer operator
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65 #define NODE_OPER_OBJMEM 37 // member of object operator
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66 #define NODE_OPER_LSH 38 // left shift
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67 #define NODE_OPER_RSH 39 // right shift
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68 #define NODE_OPER_LT 40 // less than
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69 #define NODE_OPER_LE 41 // less than or equal
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70 #define NODE_OPER_GT 42 // greater than
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71 #define NODE_OPER_GE 43 // greater than or equal
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72 #define NODE_OPER_EQ 44 // equality
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73 #define NODE_OPER_NE 45 // inequality
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74 #define NODE_OPER_BWAND 46 // bitwise and
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75 #define NODE_OPER_BWXOR 47 // bitwise xor
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76 #define NODE_OPER_BWOR 48 // bitwise or
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77 #define NODE_OPER_BAND 49 // boolean and
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78 #define NODE_OPER_BOR 50 // boolean or
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79 #define NODE_OPER_ASS 51 // assignment
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80 #define NODE_OPER_ADDASS 52 // add/assign combo
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81 #define NODE_OPER_SUBASS 53 // subtract/assign combo
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82 #define NODE_OPER_MULASS 54 // multiply/assign combo
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83 #define NODE_OPER_DIVASS 55 // divide/assign combo
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84 #define NODE_OPER_MODASS 56 // modulus/assign combo
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85 #define NODE_OPER_LSHASS 57 // left shift/assign combo
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86 #define NODE_OPER_RSHASS 58 // right shift/assign combo
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87 #define NODE_OPER_BWANDASS 59 // bitwise and/assign combo
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88 #define NODE_OPER_BWXORASS 60 // bitwise xor/assign combo
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89 #define NODE_OPER_BWORASS 61 // bitwise or/assign combo
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90 #define NODE_OPER_COMMA 62 // comma sequential evaluation operator
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91 #define NODE_TYPECAST 63 // type cast to unsigned long long
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92 #define NODE_NUMTYPES 64 // the number of node types
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93
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94 typedef struct node_s node_t;
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95
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96 struct node_s
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97 {
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98 int type; // node type
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99 char *strval; // any string value associated with the node
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100 unsigned char ival[8]; // any 64 bit integer value associated with the node, signed or unsigned
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101 node_t *children; // pointer to list of child nodes
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102 node_t *next_child; // pointer to next child in the list
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103 node_t *parent; // pointer to parent node
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104 };
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105
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106 extern node_t *node_create(int, ...);
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107 extern void node_destroy(node_t *);
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108 extern void node_addchild(node_t *, node_t *);
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109 extern void node_removechild(node_t *, node_t *);
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110 extern void node_display(node_t *, FILE *);
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111 extern void node_removechild_destroy(node_t *, node_t *);
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112
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113 #endif // tree_h_seen___