Mercurial > projects > dil

annotate trunk/src/dil/Information.d @ 422:ad7977fe315a

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Added support for column numbers in error messages. Moved class Location to module Information. In class Lexer: Renamed p_newl to beginLine. Added member errorLoc. Renamed fileName to filePath. Tidied up the code and reordered some methods. Renamed set_p_newl() to setLineBegin(). All other modifications are pretty much self-explanatory.
author Aziz K?ksal <aziz.koeksal@gmail.com>
date Sun, 30 Sep 2007 15:20:35 +0200
parents 33b566df6af4
children bb3cb00feeb2
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1 /++
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2 Author: Aziz Köksal
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3 License: GPL3
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4 +/
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5 module dil.Information;
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6 import dil.Messages;
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7 import common;
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8
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9 enum InfoType
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10 {
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11 Lexer,
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12 Parser,
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13 Semantic
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14 }
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15
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16 class Information
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17 {
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18 MID id;
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19 InfoType type;
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20 Location location;
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21 uint column;
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22 string message;
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23
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24 this(InfoType type, MID id, Location location, string message)
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25 {
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26 assert(location !is null);
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27 this.id = id;
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28 this.type = type;
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29 this.location = location;
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30 this.message = message;
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31 }
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32
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33 string getMsg()
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34 {
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35 return this.message;
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36 }
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37
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38 size_t loc()
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39 {
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40 return location.lineNum;
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41 }
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42
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43 size_t col()
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44 {
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45 if (column == 0)
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46 column = location.calculateColumn();
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47 return column;
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48 }
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49
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50 string filePath()
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51 {
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52 return location.filePath;
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53 }
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54 }
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55
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56 final class Location
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57 {
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58 char[] filePath;
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59 size_t lineNum;
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60 char* lineBegin, to; // Used to calculate column.
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61
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62 this(char[] filePath, size_t lineNum)
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63 {
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64 set(filePath, lineNum);
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65 }
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66
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67 this(char[] filePath, size_t lineNum, char* lineBegin, char* to)
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68 {
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69 set(filePath, lineNum, lineBegin, to);
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70 }
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71
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72 Location clone()
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73 {
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74 return new Location(filePath, lineNum, lineBegin, to);
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75 }
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76
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77 void set(char[] filePath, size_t lineNum)
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78 {
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79 set(filePath, lineNum, null, null);
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80 }
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81
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82 void set(char[] filePath, size_t lineNum, char* lineBegin, char* to)
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83 {
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84 this.filePath = filePath;
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85 set(lineNum, lineBegin, to);
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86 }
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87
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88 void set(size_t lineNum, char* lineBegin, char* to)
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89 {
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90 assert(lineBegin <= to);
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91 this.lineNum = lineNum;
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92 this.lineBegin = lineBegin;
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93 this.to = to;
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94 }
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95
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96 void setFilePath(char[] filePath)
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97 {
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98 this.filePath = filePath;
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99 }
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100
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101 /+
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102 This is a primitive method to count the number of characters in a string.
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103 Unicode compound characters and other special characters are not
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104 taken into account.
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105 +/
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106 uint calculateColumn()
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107 {
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108 uint col;
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109 auto p = lineBegin;
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110 for (; p <= to; ++p)
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111 {
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112 assert(delegate ()
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113 {
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114 const char[3] LS = \u2028;
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115 const char[3] PS = \u2029;
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116 // Check that there is no newline between p and to.
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117 // But 'to' may point to a newline.
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118 if (p != to && (*p == '\n' || *p == '\r'))
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119 return false;
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120 if (to-p >= 2)
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121 {
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122 if (*p == LS[0] && p[1] == LS[1] && (p[2] == LS[2] || p[2] == PS[2]))
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123 return false;
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124 }
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125 return true;
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126 }() == true
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127 );
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128
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129 // Skip this byte if it is a trail byte of a UTF-8 sequence.
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130 if (*p & 0x80 && !(*p & 0x40))
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131 continue; // *p == 0b10xx_xxxx
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132 // Only count ASCII characters and the first byte of a UTF-8 sequence.
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133 ++col;
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134 }
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135 return col;
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136 }
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137 }