Mercurial Hosting > luan
annotate core/src/luan/impl/$Luan.java @ 651:140cc5191b7a
start compiling statements
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Fri, 01 Apr 2016 17:24:44 -0600 |
parents | d658eab7bf4c |
children | 067d9470184d |
rev | line source |
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1 package luan.impl; |
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2 |
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3 import java.util.Arrays; |
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4 import java.util.List; |
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5 import java.util.ArrayList; |
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6 import luan.Luan; |
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7 import luan.LuanState; |
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8 import luan.LuanTable; |
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9 import luan.LuanFunction; |
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10 import luan.LuanException; |
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11 |
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12 |
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13 public final class $Luan { |
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14 private $Luan() {} // never |
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15 |
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16 |
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17 private static List<Expressions> listExpressions = new ArrayList<Expressions>(); |
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18 |
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19 static int addExpressions(Expressions exp) { |
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20 int i = listExpressions.size(); |
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21 listExpressions.add(exp); |
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22 return i; |
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23 } |
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24 |
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25 public static Expressions getExpressions(int i) { |
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26 return listExpressions.get(i); |
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27 } |
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28 |
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29 |
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30 private static List<Stmt> listStmt = new ArrayList<Stmt>(); |
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31 |
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32 static int addStmt(Stmt stmt) { |
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33 int i = listStmt.size(); |
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34 listStmt.add(stmt); |
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35 return i; |
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36 } |
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37 |
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38 public static Stmt getStmt(int i) { |
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39 return listStmt.get(i); |
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40 } |
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41 |
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42 |
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43 public static Object first(Object obj) { |
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44 return Luan.first(obj); |
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45 } |
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46 |
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47 public static int len(LuanState luan,Object o) throws LuanException { |
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48 if( o instanceof String ) { |
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49 String s = (String)o; |
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50 return s.length(); |
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51 } |
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52 if( o instanceof byte[] ) { |
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53 byte[] a = (byte[])o; |
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54 return a.length; |
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55 } |
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56 if( o instanceof LuanTable ) { |
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57 LuanTable t = (LuanTable)o; |
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58 return t.length(luan); |
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59 } |
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60 throw new LuanException( "attempt to get length of a " + Luan.type(o) + " value" ); |
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61 } |
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62 |
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63 public static Object unm(LuanState luan,Object o) throws LuanException { |
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64 if( o instanceof Number ) |
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65 return -((Number)o).doubleValue(); |
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66 if( o instanceof LuanTable ) { |
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67 LuanFunction fn = Luan.getHandlerFunction("__unm",(LuanTable)o); |
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68 if( fn != null ) { |
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69 return Luan.first(fn.call(luan,new Object[]{o})); |
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70 } |
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71 } |
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72 throw new LuanException("attempt to perform arithmetic on a "+Luan.type(o)+" value"); |
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73 } |
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74 |
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75 public static boolean checkBoolean(Object o) throws LuanException { |
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76 return Luan.checkBoolean(o); |
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77 } |
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78 |
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79 public static boolean not(Object o) throws LuanException { |
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80 return !checkBoolean(o); |
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81 } |
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82 |
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83 private static Object arithmetic(LuanState luan,String op,Object o1,Object o2) throws LuanException { |
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84 LuanFunction fn = Luan.getBinHandler(op,o1,o2); |
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85 if( fn != null ) |
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86 return Luan.first(fn.call(luan,new Object[]{o1,o2})); |
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87 String type = !(o1 instanceof Number) ? Luan.type(o1) : Luan.type(o2); |
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88 throw new LuanException("attempt to perform arithmetic on a "+type+" value"); |
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89 } |
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90 |
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91 public static Object pow(LuanState luan,Object o1,Object o2) throws LuanException { |
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92 if( o1 instanceof Number && o2 instanceof Number ) |
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93 return Math.pow( ((Number)o1).doubleValue(), ((Number)o2).doubleValue() ); |
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94 return arithmetic(luan,"__pow",o1,o2); |
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95 } |
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96 |
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97 public static Object mul(LuanState luan,Object o1,Object o2) throws LuanException { |
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98 if( o1 instanceof Number && o2 instanceof Number ) |
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99 return ((Number)o1).doubleValue() * ((Number)o2).doubleValue(); |
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100 return arithmetic(luan,"__mul",o1,o2); |
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101 } |
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102 |
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103 public static Object div(LuanState luan,Object o1,Object o2) throws LuanException { |
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104 if( o1 instanceof Number && o2 instanceof Number ) |
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105 return ((Number)o1).doubleValue() / ((Number)o2).doubleValue(); |
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106 return arithmetic(luan,"__div",o1,o2); |
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107 } |
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108 |
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109 public static Object mod(LuanState luan,Object o1,Object o2) throws LuanException { |
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110 if( o1 instanceof Number && o2 instanceof Number ) { |
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111 double d1 = ((Number)o1).doubleValue(); |
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112 double d2 = ((Number)o2).doubleValue(); |
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113 return d1 - Math.floor(d1/d2)*d2; |
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114 } |
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115 return arithmetic(luan,"__mod",o1,o2); |
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116 } |
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117 |
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118 public static Object add(LuanState luan,Object o1,Object o2) throws LuanException { |
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119 if( o1 instanceof Number && o2 instanceof Number ) |
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120 return ((Number)o1).doubleValue() + ((Number)o2).doubleValue(); |
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121 return arithmetic(luan,"__add",o1,o2); |
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122 } |
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123 |
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124 public static Object sub(LuanState luan,Object o1,Object o2) throws LuanException { |
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125 if( o1 instanceof Number && o2 instanceof Number ) |
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126 return ((Number)o1).doubleValue() - ((Number)o2).doubleValue(); |
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127 return arithmetic(luan,"__sub",o1,o2); |
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128 } |
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129 |
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130 public static Object concat(LuanState luan,Object o1,Object o2) throws LuanException { |
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131 LuanFunction fn = Luan.getBinHandler("__concat",o1,o2); |
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132 if( fn != null ) |
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133 return Luan.first(fn.call(luan,new Object[]{o1,o2})); |
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134 String s1 = luan.toString(o1); |
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135 String s2 = luan.toString(o2); |
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136 return s1 + s2; |
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137 } |
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138 |
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139 public static boolean eq(LuanState luan,Object o1,Object o2) throws LuanException { |
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140 if( o1 == o2 || o1 != null && o1.equals(o2) ) |
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141 return true; |
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142 if( o1 instanceof Number && o2 instanceof Number ) { |
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143 Number n1 = (Number)o1; |
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144 Number n2 = (Number)o2; |
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145 return n1.doubleValue() == n2.doubleValue(); |
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146 } |
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147 if( o1 instanceof byte[] && o2 instanceof byte[] ) { |
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148 byte[] b1 = (byte[])o1; |
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149 byte[] b2 = (byte[])o2; |
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150 return Arrays.equals(b1,b2); |
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151 } |
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152 if( !(o1 instanceof LuanTable && o2 instanceof LuanTable) ) |
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153 return false; |
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154 LuanTable t1 = (LuanTable)o1; |
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155 LuanTable t2 = (LuanTable)o2; |
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156 LuanTable mt1 = t1.getMetatable(); |
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157 LuanTable mt2 = t2.getMetatable(); |
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158 if( mt1==null || mt2==null ) |
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159 return false; |
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160 Object f = mt1.rawGet("__eq"); |
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161 if( f == null || !f.equals(mt2.rawGet("__eq")) ) |
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162 return false; |
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163 LuanFunction fn = Luan.checkFunction(f); |
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164 return Luan.checkBoolean( Luan.first(fn.call(luan,new Object[]{o1,o2})) ); |
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165 } |
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166 |
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167 public static boolean le(LuanState luan,Object o1,Object o2) throws LuanException { |
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168 if( o1 instanceof Number && o2 instanceof Number ) { |
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169 Number n1 = (Number)o1; |
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170 Number n2 = (Number)o2; |
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171 return n1.doubleValue() <= n2.doubleValue(); |
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172 } |
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173 if( o1 instanceof String && o2 instanceof String ) { |
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174 String s1 = (String)o1; |
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175 String s2 = (String)o2; |
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176 return s1.compareTo(s2) <= 0; |
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177 } |
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178 LuanFunction fn = Luan.getBinHandler("__le",o1,o2); |
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179 if( fn != null ) |
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180 return Luan.checkBoolean( Luan.first(fn.call(luan,new Object[]{o1,o2})) ); |
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181 fn = Luan.getBinHandler("__lt",o1,o2); |
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182 if( fn != null ) |
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183 return !Luan.checkBoolean( Luan.first(fn.call(luan,new Object[]{o2,o1})) ); |
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184 throw new LuanException( "attempt to compare " + Luan.type(o1) + " with " + Luan.type(o2) ); |
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185 } |
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186 |
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187 public static boolean lt(LuanState luan,Object o1,Object o2) throws LuanException { |
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188 return Luan.isLessThan(luan,o1,o2); |
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189 } |
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190 |
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191 public static boolean cnd(Object o) throws LuanException { |
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192 return !(o == null || Boolean.FALSE.equals(o)); |
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193 } |
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194 |
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195 public static void nop(Object o) {} |
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196 |
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197 } |