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Checkpoint lwcc development - preprocessor is runnable but nonfunctional The preprocessor is currently runnable but doesn't actually do anything useful. This is just a checkpoint.
author William Astle <lost@l-w.ca>
date Tue, 17 Sep 2013 19:33:41 -0600
parents 2cc599f1bebf
children
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1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
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2 <HTML
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3 ><HEAD
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4 ><TITLE
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5 >Symbols</TITLE
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6 ><META
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7 NAME="GENERATOR"
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8 CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
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9 REL="HOME"
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10 TITLE="LW Tool Chain"
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11 HREF="index.html"><LINK
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12 REL="UP"
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13 TITLE="LWASM"
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14 HREF="c45.html"><LINK
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15 REL="PREVIOUS"
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16 TITLE="Source Format"
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17 HREF="x177.html"><LINK
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18 REL="NEXT"
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19 TITLE="Numbers and Expressions"
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20 HREF="x192.html"></HEAD
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21 ><BODY
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22 CLASS="SECTION"
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23 BGCOLOR="#FFFFFF"
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24 TEXT="#000000"
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25 LINK="#0000FF"
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26 VLINK="#840084"
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27 ALINK="#0000FF"
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28 ><DIV
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29 CLASS="NAVHEADER"
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30 ><TABLE
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31 SUMMARY="Header navigation table"
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32 WIDTH="100%"
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33 BORDER="0"
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34 CELLPADDING="0"
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35 CELLSPACING="0"
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36 ><TR
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37 ><TH
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38 COLSPAN="3"
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39 ALIGN="center"
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40 >LW Tool Chain</TH
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41 ></TR
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42 ><TR
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43 ><TD
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44 WIDTH="10%"
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45 ALIGN="left"
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46 VALIGN="bottom"
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47 ><A
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48 HREF="x177.html"
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49 ACCESSKEY="P"
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50 >Prev</A
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51 ></TD
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52 ><TD
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53 WIDTH="80%"
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54 ALIGN="center"
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55 VALIGN="bottom"
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56 >Chapter 3. LWASM</TD
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57 ><TD
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58 WIDTH="10%"
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59 ALIGN="right"
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60 VALIGN="bottom"
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61 ><A
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62 HREF="x192.html"
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63 ACCESSKEY="N"
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64 >Next</A
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65 ></TD
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66 ></TR
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67 ></TABLE
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68 ><HR
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69 ALIGN="LEFT"
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70 WIDTH="100%"></DIV
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71 ><DIV
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72 CLASS="SECTION"
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73 ><H1
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74 CLASS="SECTION"
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75 ><A
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76 NAME="AEN187"
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77 >3.4. Symbols</A
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78 ></H1
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79 ><P
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80 >Symbols have no length restriction. They may contain letters, numbers, dots,
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81 dollar signs, and underscores. They must start with a letter, dot, or
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82 underscore.</P
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83 ><P
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84 >LWASM also supports the concept of a local symbol. A local symbol is one
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85 which contains either a "?" or a "@", which can appear anywhere in the symbol.
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86 The scope of a local symbol is determined by a number of factors. First,
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87 each included file gets its own local symbol scope. A blank line will also
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88 be considered a local scope barrier. Macros each have their own local symbol
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89 scope as well (which has a side effect that you cannot use a local symbol
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90 as an argument to a macro). There are other factors as well. In general,
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91 a local symbol is restricted to the block of code it is defined within.</P
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92 ><P
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93 >By default, unless assembling to the os9 target, a "$" in the symbol will
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94 also make it local. This can be controlled by the "dollarlocal" and
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95 "nodollarlocal" pragmas. In the absence of a pragma to the contrary, for
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96 the os9 target, a "$" in the symbol will not make it considered local while
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97 for all other targets it will.</P
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98 ></DIV
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99 ><DIV
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100 CLASS="NAVFOOTER"
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101 ><HR
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102 ALIGN="LEFT"
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103 WIDTH="100%"><TABLE
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104 SUMMARY="Footer navigation table"
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105 WIDTH="100%"
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106 BORDER="0"
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107 CELLPADDING="0"
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108 CELLSPACING="0"
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109 ><TR
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110 ><TD
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111 WIDTH="33%"
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112 ALIGN="left"
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113 VALIGN="top"
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114 ><A
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115 HREF="x177.html"
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116 ACCESSKEY="P"
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117 >Prev</A
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118 ></TD
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119 ><TD
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120 WIDTH="34%"
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121 ALIGN="center"
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122 VALIGN="top"
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123 ><A
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124 HREF="index.html"
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125 ACCESSKEY="H"
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126 >Home</A
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127 ></TD
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128 ><TD
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129 WIDTH="33%"
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130 ALIGN="right"
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131 VALIGN="top"
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132 ><A
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133 HREF="x192.html"
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134 ACCESSKEY="N"
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135 >Next</A
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136 ></TD
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137 ></TR
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138 ><TR
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139 ><TD
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140 WIDTH="33%"
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141 ALIGN="left"
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142 VALIGN="top"
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143 >Source Format</TD
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144 ><TD
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145 WIDTH="34%"
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146 ALIGN="center"
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147 VALIGN="top"
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148 ><A
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149 HREF="c45.html"
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150 ACCESSKEY="U"
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151 >Up</A
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152 ></TD
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153 ><TD
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154 WIDTH="33%"
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155 ALIGN="right"
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156 VALIGN="top"
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157 >Numbers and Expressions</TD
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158 ></TR
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159 ></TABLE
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diff changeset
160 ></DIV
2cc599f1bebf Added --define to lwasm documentation.
William Astle <lost@l-w.ca>
parents:
diff changeset
161 ></BODY
2cc599f1bebf Added --define to lwasm documentation.
William Astle <lost@l-w.ca>
parents:
diff changeset
162 ></HTML
2cc599f1bebf Added --define to lwasm documentation.
William Astle <lost@l-w.ca>
parents:
diff changeset
163 >