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annotate anagram/agcore/rule.h @ 4:bebb2ba69e1d

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maybe help with getting tex to fail properly on error
author David A. Holland
date Sat, 18 Apr 2020 17:12:17 -0400
parents 13d2b8934445
children 607e3be6bad8
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1 /*
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2 * AnaGram, A System for Syntax Directed Programming
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3 * Copyright 1993-2002 Parsifal Software. All Rights Reserved.
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4 * See the file COPYING for license and usage terms.
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5 *
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6 * rule.h
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7 */
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8
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9 #ifndef RULE_H
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10 #define RULE_H
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11
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12 class AgStringDictionary; // from agdict.h
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13 #include "agstring.h"
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14 #include "register.h"
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15
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16
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17 struct RuleDescriptor; // below
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18 class Token; // from token.h (included below)
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19
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20 extern AgStringDictionary cVariableList;
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21
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22 class Rule : public ObjectRegister<RuleDescriptor> {
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23 public:
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24 Rule();// {}
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25 Rule(int x);
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26 Rule(const Rule &t);
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27 Token &token(int) const;
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28
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29 static Rule create();
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30 static void reset();
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31 static const int first;
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32
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33 class Map;
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34 friend class Map;
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35
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36 class Map {
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37 public:
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38 RuleDescriptor &operator [] (unsigned x);
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39 };
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40 };
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41
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42 class CastDescriptor {
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43 public:
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44 AgString name;
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45 int wrapper : 1;
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46
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47 CastDescriptor();
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48 CastDescriptor(const char *s);
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49 int operator < (const CastDescriptor &c) const { return name < c.name; }
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50 char *pointer() { return name.pointer(); }
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51 };
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52
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53 class Cast : public KeyedObjectRegister<CastDescriptor> {
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54 public:
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55 Cast();
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56 Cast(const int x);
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57 Cast(const char *);
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58 Cast(const AgString);
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59
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60 static const int first;
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61
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62 static void reset();
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63 static Cast create();
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64
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65 AgString &name() { return descriptor->name; }
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66 int operator < (const Cast x) const;
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67
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68 static Cast voidCast;
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69 static Cast intCast;
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70 static Cast longCast;
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71 static int nWrappers;
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72
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73 void requireWrapper();
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74 int wrapperRequired();
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75 };
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76
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77 #include "token.h"
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78
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79 class RuleElement {
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80 public:
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81 Token token;
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82 int cVariable;
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83
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84 RuleElement() {}
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85 RuleElement(const Token &t, int x);
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86 int operator < (const RuleElement) const;
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87 };
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88
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89 struct RuleDescriptor {
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90 Token prim_tkn;
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91 unsigned line, col;
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92 unsigned proc_name;
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93 AgArray<RuleElement> elementList;
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94 AgArray<RuleElement> hostElementList; // for immmediate actions only
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95 unsigned
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96 non_vanishing_length,
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97 op_bias;
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98 unsigned precedence_level;
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99 unsigned not_unique_reduction : 1;
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100 unsigned error_mask: 1;
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101 unsigned left_associative: 1;
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102 unsigned right_associative: 1;
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103 unsigned fast_loop: 1;
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104 unsigned immediate_proc: 1;
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105 unsigned lexical: 1;
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106 unsigned nonLexical: 1;
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107 unsigned reductionRequired: 1;
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108
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109 unsigned length() { return elementList.size(); }
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110 RuleDescriptor();
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111 int operator < (const RuleDescriptor &d) const {
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112 return elementList < d.elementList;
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113 }
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114 Token &token(int);
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115 };
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116
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117 extern Rule::Map map_form_number;
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118
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119 struct VpRuleDescriptor {
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120 AgArray<RuleElement> elementList;
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121 unsigned procedureName;
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122
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123 VpRuleDescriptor();
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124 VpRuleDescriptor(AgStack<RuleElement> &, int pn);
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125 int operator < (const VpRuleDescriptor x) const;
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126 };
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127
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128 class VpRule : public KeyedObjectRegister<VpRuleDescriptor> {
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129 public:
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130 VpRule();
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131 VpRule(const int x);
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132 VpRule(const VpRule &x);
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133 VpRule(AgStack<RuleElement> &, int pn);
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134
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135 static const int first;
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136
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137 static void reset();
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138 static VpRule create();
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139 };
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140
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141
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142 #endif /* RULE_H */