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annotate core/src/luan/modules/BasicLuan.java @ 264:9e0d4452e649

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implement URL style module names git-svn-id: https://luan-java.googlecode.com/svn/trunk@265 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Wed, 29 Oct 2014 03:50:59 +0000
parents f1f7d8c7e94e
children 454a486d9c19
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rev   line source
167
4c0131c2b650 merge luan/lib into modules
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diff changeset
1 package luan.modules;
2
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2
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3 import java.io.InputStreamReader;
12
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4 import java.io.IOException;
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5 import java.lang.reflect.Method;
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6 import java.util.Iterator;
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7 import java.util.Map;
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8 import java.util.List;
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9 import java.util.ArrayList;
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10 import luan.Luan;
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11 import luan.LuanState;
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12 import luan.LuanTable;
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13 import luan.LuanFunction;
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14 import luan.LuanJavaFunction;
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15 import luan.LuanException;
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16 import luan.LuanSource;
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17 import luan.LuanElement;
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18 import luan.impl.LuanCompiler;
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20
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21 public final class BasicLuan {
2
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23 public static final LuanFunction LOADER = new LuanFunction() {
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24 @Override public Object call(LuanState luan,Object[] args) {
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25 LuanTable module = Luan.newTable();
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26 try {
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27 module.put( "assert", new LuanJavaFunction(BasicLuan.class.getMethod("assert_",LuanState.class,Object.class,String.class),null) );
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28 add( module, "assert_boolean", LuanState.class, Boolean.TYPE );
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29 add( module, "assert_nil", LuanState.class, Object.class );
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30 add( module, "assert_number", LuanState.class, Number.class );
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31 add( module, "assert_string", LuanState.class, String.class );
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32 add( module, "assert_table", LuanState.class, LuanTable.class );
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ef39bc4d3f70 basic lucene works
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33 add( module, "assert_integer", LuanState.class, Integer.TYPE );
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34 add( module, "do_file", LuanState.class, String.class );
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35 add( module, "error", LuanState.class, Object.class );
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36 add( module, "get_metatable", LuanState.class, Object.class );
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37 add( module, "ipairs", LuanState.class, LuanTable.class );
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38 add( module, "load", LuanState.class, String.class, String.class, LuanTable.class, Boolean.class );
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39 add( module, "load_file", LuanState.class, String.class );
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40 add( module, "pairs", LuanState.class, LuanTable.class );
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41 add( module, "range", LuanState.class, Double.TYPE, Double.TYPE, Double.class );
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42 add( module, "raw_equal", Object.class, Object.class );
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43 add( module, "raw_get", LuanTable.class, Object.class );
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44 add( module, "raw_len", LuanState.class, Object.class );
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45 add( module, "raw_set", LuanTable.class, Object.class, Object.class );
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46 add( module, "repr", LuanState.class, Object.class );
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47 add( module, "set_metatable", LuanTable.class, LuanTable.class );
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1fada5587469 add Basic.to_boolean and change "not" operator to require a boolean
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48 add( module, "to_boolean", Object.class );
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49 add( module, "to_number", Object.class, Integer.class );
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50 add( module, "to_string", LuanState.class, Object.class );
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51 add( module, "type", Object.class );
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52 add( module, "values", new Object[0].getClass() );
73
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53 } catch(NoSuchMethodException e) {
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54 throw new RuntimeException(e);
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55 }
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56 return module;
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57 }
73
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58 };
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59
64
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60 private static void add(LuanTable t,String method,Class<?>... parameterTypes) throws NoSuchMethodException {
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61 t.put( method, new LuanJavaFunction(BasicLuan.class.getMethod(method,parameterTypes),null) );
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62 }
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63
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64 public static String type(Object obj) {
48
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65 return Luan.type(obj);
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66 }
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67
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68 public static LuanFunction load(LuanState luan,String text,String sourceName,LuanTable env,Boolean allowExpr)
128
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69 throws LuanException
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70 {
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71 if( allowExpr==null )
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72 allowExpr = false;
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73 return LuanCompiler.compile(luan,new LuanSource(sourceName,text),env,allowExpr);
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74 }
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75
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76 public static LuanFunction load_file(LuanState luan,String fileName) throws LuanException {
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77 LuanTable t = fileName==null ? IoLuan.stdin.table() : IoLuan.get(luan,fileName,false);
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78 if( t == null )
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79 throw luan.exception( "file '"+fileName+"' not found" );
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80 LuanFunction loader = (LuanFunction)t.get("loader");
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81 return (LuanFunction)Luan.first(luan.call(loader,new Object[]{fileName}));
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82 }
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83
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84 public static Object do_file(LuanState luan,String fileName) throws LuanException {
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85 LuanFunction fn = load_file(luan,fileName);
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86 return luan.call(fn);
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87 }
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88
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89 public static LuanFunction pairs(LuanState luan,final LuanTable t) throws LuanException {
251
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90 Utils.checkNotNull(luan,t);
48
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91 return new LuanFunction() {
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92 Iterator<Map.Entry<Object,Object>> iter = t.iterator();
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93
109
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94 @Override public Object[] call(LuanState luan,Object[] args) {
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95 if( !iter.hasNext() )
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96 return LuanFunction.NOTHING;
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97 Map.Entry<Object,Object> entry = iter.next();
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98 return new Object[]{entry.getKey(),entry.getValue()};
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99 }
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100 };
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101 }
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102
221
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103 public static LuanFunction ipairs(LuanState luan,final LuanTable t) throws LuanException {
251
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104 Utils.checkNotNull(luan,t);
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105 return new LuanFunction() {
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106 List<Object> list = t.asList();
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107 int i = 0;
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108 final int size = list.size();
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109
221
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110 @Override public Object[] call(LuanState luan,Object[] args) {
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111 if( i >= size )
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112 return LuanFunction.NOTHING;
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113 Object val = list.get(i++);
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114 return new Object[]{i,val};
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115 }
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116 };
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117 }
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118
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119 public static LuanTable get_metatable(LuanState luan,Object obj) {
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120 return luan.getMetatable(obj);
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121 }
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122
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123 public static LuanTable set_metatable(LuanTable table,LuanTable metatable) {
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124 table.setMetatable(metatable);
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125 return table;
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126 }
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127
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128 public static boolean raw_equal(Object v1,Object v2) {
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129 return v1 == v2 || v1 != null && v1.equals(v2);
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130 }
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131
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132 public static Object raw_get(LuanTable table,Object index) {
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133 return table.get(index);
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134 }
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135
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136 public static LuanTable raw_set(LuanTable table,Object index,Object value) {
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137 table.put(index,value);
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138 return table;
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139 }
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140
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141 public static int raw_len(LuanState luan,Object v) throws LuanException {
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142 if( v instanceof String ) {
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143 String s = (String)v;
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144 return s.length();
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145 }
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146 if( v instanceof LuanTable ) {
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147 LuanTable t = (LuanTable)v;
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148 return t.length();
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149 }
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150 throw luan.exception( "bad argument #1 to 'raw_len' (table or string expected)" );
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151 }
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152
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153 public static Number to_number(Object e,Integer base) {
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154 return Luan.toNumber(e,base);
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155 }
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156
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157 public static String to_string(LuanState luan,Object v) throws LuanException {
130
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158 return luan.toString(v);
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159 }
41
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160
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161 public static boolean to_boolean(Object v) throws LuanException {
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162 return Luan.toBoolean(v);
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163 }
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164
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165 public static void error(LuanState luan,Object msg) throws LuanException {
130
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166 throw luan.exception(msg);
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167 }
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168
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169 public static Object assert_(LuanState luan,Object v,String msg) throws LuanException {
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170 if( Luan.toBoolean(v) )
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171 return v;
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172 if( msg == null )
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173 msg = "assertion failed!";
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174 throw luan.exception( msg );
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175 }
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176
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177 public static String assert_string(LuanState luan,String v) throws LuanException {
251
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178 Utils.checkNotNull(luan,v);
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179 return v;
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180 }
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181
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182 public static Number assert_number(LuanState luan,Number v) throws LuanException {
251
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183 Utils.checkNotNull(luan,v);
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184 return v;
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185 }
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186
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187 public static LuanTable assert_table(LuanState luan,LuanTable v) throws LuanException {
251
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188 Utils.checkNotNull(luan,v);
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189 return v;
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190 }
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191
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192 public static boolean assert_boolean(LuanState luan,boolean v) throws LuanException {
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193 return v;
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194 }
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195
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196 public static Object assert_nil(LuanState luan,Object v) throws LuanException {
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197 if( v != null )
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198 throw luan.exception("bad argument #1 (nil expected, got "+Luan.type(v)+")");
64
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199 return v;
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200 }
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201
233
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202 public static int assert_integer(LuanState luan,int v) throws LuanException {
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203 return v;
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204 }
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205
88
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206 public static String repr(LuanState luan,Object v) throws LuanException {
130
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207 return luan.repr(v);
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208 }
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209
109
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210 public static LuanFunction range(LuanState luan,final double from,final double to,Double stepV) throws LuanException {
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211 final double step = stepV==null ? 1.0 : stepV;
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212 if( step == 0.0 )
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213 throw luan.exception("bad argument #3 (step may not be zero)");
109
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214 return new LuanFunction() {
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215 double v = from;
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216
112
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217 @Override public Object call(LuanState luan,Object[] args) {
109
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218 if( step > 0.0 && v > to || step < 0.0 && v < to )
123
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219 return LuanFunction.NOTHING;
109
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220 double rtn = v;
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221 v += step;
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222 return rtn;
109
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223 }
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224 };
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225 }
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226
116
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227 public static LuanFunction values(final Object... args) throws LuanException {
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228 return new LuanFunction() {
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229 int i = 0;
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230
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231 @Override public Object call(LuanState luan,Object[] unused) {
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232 if( ++i > args.length )
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233 return LuanFunction.NOTHING;
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234 return new Object[]{i,args[i-1]};
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235 }
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236 };
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237 }
143
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238
2
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239 }