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annotate core/src/luan/impl/LuanCompiler.java @ 457:0ca5d1d6250b

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handle StackOverflowError for circular references
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 05 May 2015 23:10:34 -0600
parents 23b99a5039b5
children 30544d1a9cbf
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan.impl;
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3 import luan.LuanFunction;
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4 import luan.LuanState;
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5 import luan.LuanException;
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6 import luan.LuanSource;
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7 import luan.LuanElement;
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8 import luan.LuanTable;
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9 import luan.modules.JavaLuan;
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10 import luan.modules.PackageLuan;
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11 import java.util.Map;
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14 public final class LuanCompiler {
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15 private LuanCompiler() {} // never
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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17 public static LuanFunction compile(LuanState luan,LuanSource src,LuanTable env,boolean allowExpr) throws LuanException {
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18 if( env==null )
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19 env = new LuanTable();
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20 UpValue.Getter envGetter = new UpValue.ValueGetter(env);
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21 LuanParser parser = new LuanParser(src,envGetter);
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22 parser.addVar( "java", JavaLuan.javaFn );
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23 parser.addVar( "require", PackageLuan.requireFn );
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24 FnDef fnDef = parse(luan,parser,allowExpr);
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25 final LuanStateImpl luanImpl = (LuanStateImpl)luan;
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26 return new Closure(luanImpl,fnDef);
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27 }
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29 private static FnDef parse(LuanState luan,LuanParser parser,boolean allowExpr) throws LuanException {
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30 try {
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31 if( allowExpr ) {
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32 FnDef fnDef = parser.Expression();
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33 if( fnDef != null )
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34 return fnDef;
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35 }
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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36 return parser.RequiredModule();
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37 } catch(ParseException e) {
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38 //e.printStackTrace();
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39 LuanElement le = new LuanSource.CompilerElement(parser.source);
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40 throw luan.bit(le).exception( e.getFancyMessage() );
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41 } catch(StackOverflowError e) {
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42 LuanElement le = new LuanSource.CompilerElement(parser.source);
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43 throw luan.bit(le).exception("stack overflow");
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44 }
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45 }
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47 public static LuanState newLuanState() {
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48 return new LuanStateImpl();
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49 }
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50 }