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annotate src/luan/lib/BasicLib.java @ 115:eacf6ce1b47d

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add IoLib git-svn-id: https://luan-java.googlecode.com/svn/trunk@116 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 29 May 2014 09:26:44 +0000
parents f5af13062b10
children 1ff1c32417eb
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1 package luan.lib;
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3 import java.io.File;
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4 import java.io.InputStreamReader;
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5 import java.io.IOException;
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6 import java.lang.reflect.Method;
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7 import java.util.Iterator;
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8 import java.util.Map;
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9 import java.util.List;
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10 import java.util.ArrayList;
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11 import luan.Luan;
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12 import luan.LuanState;
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13 import luan.LuanTable;
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14 import luan.LuanFunction;
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15 import luan.LuanJavaFunction;
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16 import luan.LuanException;
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17 import luan.LuanSource;
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18 import luan.LuanElement;
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19 import luan.interp.LuanCompiler;
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22 public final class BasicLib {
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24 public static final String NAME = "Basic";
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26 public static final LuanFunction LOADER = new LuanFunction() {
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27 @Override public Object call(LuanState luan,Object[] args) {
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28 LuanTable module = new LuanTable();
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29 LuanTable global = luan.global();
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30 try {
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31 global.put( "assert", new LuanJavaFunction(BasicLib.class.getMethod("assert_",LuanState.class,Object.class,String.class),null) );
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32 add( global, "assert_boolean", LuanState.class, Boolean.TYPE );
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33 add( global, "assert_nil", LuanState.class, Object.class );
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34 add( global, "assert_number", LuanState.class, Number.class );
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35 add( global, "assert_string", LuanState.class, String.class );
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36 add( global, "assert_table", LuanState.class, LuanTable.class );
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37 add( global, "do_file", LuanState.class, String.class );
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38 add( global, "error", LuanState.class, Object.class );
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39 add( global, "get_metatable", LuanState.class, Object.class );
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40 add( global, "ipairs", LuanState.class, LuanTable.class );
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41 add( global, "load", LuanState.class, String.class, String.class, Boolean.class );
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42 add( global, "load_file", LuanState.class, String.class );
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43 add( global, "pairs", LuanState.class, LuanTable.class );
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44 add( global, "print", LuanState.class, new Object[0].getClass() );
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45 add( global, "range", LuanState.class, Double.TYPE, Double.TYPE, Double.class );
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46 add( global, "raw_equal", Object.class, Object.class );
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47 add( global, "raw_get", LuanTable.class, Object.class );
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48 add( global, "raw_len", LuanState.class, Object.class );
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49 add( global, "raw_set", LuanTable.class, Object.class, Object.class );
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50 add( global, "repr", LuanState.class, Object.class );
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51 add( global, "set_metatable", LuanTable.class, LuanTable.class );
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52 add( global, "to_number", Object.class, Integer.class );
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53 add( global, "to_string", LuanState.class, Object.class );
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54 add( global, "type", Object.class );
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55 global.put( "_VERSION", Luan.version );
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56 } catch(NoSuchMethodException e) {
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57 throw new RuntimeException(e);
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58 }
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59 return module;
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60 }
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61 };
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63 private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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64 t.put( method, new LuanJavaFunction(BasicLib.class.getMethod(method,parameterTypes),null) );
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65 }
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67 public static void print(LuanState luan,Object... args) throws LuanException {
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68 LuanFunction write = (LuanFunction)luan.get("Io.stdout.write");
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69 List list = new ArrayList();
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70 for( int i=0; i<args.length; i++ ) {
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71 if( i > 0 )
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72 list.add("\t");
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73 list.add(args[i]);
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74 }
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75 list.add("\n");
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76 write.call(luan,list.toArray());
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77 }
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78
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79 public static String type(Object obj) {
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80 return Luan.type(obj);
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81 }
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83 public static LuanFunction load(LuanState luan,String text,String sourceName,Boolean interactive) throws LuanException {
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84 if( interactive!=null && interactive )
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85 return LuanCompiler.compileInteractive(luan,new LuanSource(sourceName,text));
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86 else
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87 return LuanCompiler.compileModule(luan,new LuanSource(sourceName,text));
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88 }
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91 public static LuanFunction load_file(LuanState luan,String fileName) throws LuanException, IOException {
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92 String src = fileName==null ? Utils.readAll(new InputStreamReader(System.in)) : Utils.read(new File(fileName));
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93 return load(luan,src,fileName,false);
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94 }
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95
115
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96 public static Object do_file(LuanState luan,String fileName) throws LuanException, IOException {
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97 LuanFunction fn = load_file(luan,fileName);
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98 return luan.JAVA.call(fn,null);
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99 }
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100
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101 private static LuanFunction pairs(final Iterator<Map.Entry<Object,Object>> iter) {
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102 return new LuanFunction() {
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103 @Override public Object[] call(LuanState luan,Object[] args) {
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104 if( !iter.hasNext() )
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105 return LuanFunction.EMPTY;
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106 Map.Entry<Object,Object> entry = iter.next();
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107 return new Object[]{entry.getKey(),entry.getValue()};
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108 }
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109 };
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110 }
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111
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112 public static LuanFunction pairs(LuanState luan,LuanTable t) throws LuanException {
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113 Utils.checkNotNull(luan,t,"table");
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114 return pairs( t.iterator() );
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115 }
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116
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117 public static LuanFunction ipairs(LuanState luan,LuanTable t) throws LuanException {
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118 Utils.checkNotNull(luan,t,"table");
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119 return pairs( t.listIterator() );
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120 }
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121
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122 public static LuanTable get_metatable(LuanState luan,Object obj) {
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123 return luan.getMetatable(obj);
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124 }
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125
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126 public static LuanTable set_metatable(LuanTable table,LuanTable metatable) {
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127 table.setMetatable(metatable);
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128 return table;
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129 }
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130
39
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131 public static boolean raw_equal(Object v1,Object v2) {
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132 return v1 == v2 || v1 != null && v1.equals(v2);
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133 }
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134
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135 public static Object raw_get(LuanTable table,Object index) {
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136 return table.get(index);
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137 }
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138
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139 public static LuanTable raw_set(LuanTable table,Object index,Object value) {
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140 table.put(index,value);
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141 return table;
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142 }
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143
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144 public static int raw_len(LuanState luan,Object v) throws LuanException {
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145 if( v instanceof String ) {
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146 String s = (String)v;
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147 return s.length();
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148 }
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149 if( v instanceof LuanTable ) {
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150 LuanTable t = (LuanTable)v;
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151 return t.length();
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152 }
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153 throw luan.JAVA.exception( "bad argument #1 to 'raw_len' (table or string expected)" );
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154 }
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155
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156 public static Number to_number(Object e,Integer base) {
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157 return Luan.toNumber(e,base);
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158 }
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159
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160 public static String to_string(LuanState luan,Object v) throws LuanException {
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161 return luan.JAVA.toString(v);
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162 }
41
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163
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164 public static void error(LuanState luan,Object msg) throws LuanException {
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165 throw luan.JAVA.exception(msg);
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166 }
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167
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168 public static Object assert_(LuanState luan,Object v,String msg) throws LuanException {
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169 if( Luan.toBoolean(v) )
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170 return v;
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171 if( msg == null )
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172 msg = "assertion failed!";
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173 throw luan.JAVA.exception( msg );
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174 }
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175
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176 public static String assert_string(LuanState luan,String v) throws LuanException {
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177 Utils.checkNotNull(luan,v,"string");
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178 return v;
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179 }
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180
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181 public static Number assert_number(LuanState luan,Number v) throws LuanException {
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182 Utils.checkNotNull(luan,v,"number");
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183 return v;
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184 }
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185
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186 public static LuanTable assert_table(LuanState luan,LuanTable v) throws LuanException {
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187 Utils.checkNotNull(luan,v,"table");
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188 return v;
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189 }
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190
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191 public static boolean assert_boolean(LuanState luan,boolean v) throws LuanException {
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192 return v;
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193 }
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194
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195 public static Object assert_nil(LuanState luan,Object v) throws LuanException {
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196 if( v != null )
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197 throw luan.JAVA.exception("bad argument #1 (nil expected, got "+Luan.type(v)+")");
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198 return v;
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199 }
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200
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201 public static String repr(LuanState luan,Object v) throws LuanException {
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202 return luan.JAVA.repr(v);
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203 }
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204
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205 public static LuanFunction range(LuanState luan,final double from,final double to,Double stepV) throws LuanException {
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206 final double step = stepV==null ? 1.0 : stepV;
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207 if( step == 0.0 )
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208 throw luan.JAVA.exception("bad argument #3 (step may not be zero)");
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209 return new LuanFunction() {
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210 double v = from;
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211
112
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212 @Override public Object call(LuanState luan,Object[] args) {
109
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213 if( step > 0.0 && v > to || step < 0.0 && v < to )
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214 return LuanFunction.EMPTY;
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215 double rtn = v;
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216 v += step;
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217 return rtn;
109
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218 }
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219 };
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220 }
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221
2
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222 }