Improve java code generator.

grammar/LuaParser.jj

@@ -342,7 +342,7 @@ Exp SimpleExp():
 	<NIL>					{ return Exp.constant(LuaValue.NIL); } 		
 |	<TRUE>					{ return Exp.constant(LuaValue.TRUE); }
 |	<FALSE>					{ return Exp.constant(LuaValue.FALSE); }
-|	n=<NUMBER>				{ return Exp.constant(LuaValue.valueOf(Double.valueOf(n.image))); }
+|	n=<NUMBER>				{ return Exp.numberconstant(n.image); }
 |	s=Str()					{ return Exp.constant(s); }
 |	"..."					{ return Exp.varargs(); } 
 |	tc=TableConstructor()	{ return Exp.tableconstructor(tc); }

src/jse/lua2java.java

@@ -30,6 +30,7 @@ import java.util.List;
 
 import org.luaj.vm2.Lua;
 import org.luaj.vm2.ast.Chunk;
+import org.luaj.vm2.lib.JsePlatform;
 import org.luaj.vm2.lua2java.JavaCodeGen;
 import org.luaj.vm2.parser.LuaParser;
 
@@ -125,6 +126,7 @@ public class lua2java {
 			}
 			
 			// process input files
+			JsePlatform.standardGlobals();
 			for ( InputFile inf : files )
 				processFile( inf );
 			

src/jse/org/luaj/vm2/ast/Exp.java

@@ -32,6 +32,10 @@ public class Exp {
 		return new Constant(value);
 	}
 
+	public static Exp numberconstant(String token) {		
+		return new Constant( LuaValue.valueOf(token).tonumber() );
+	}
+
 	public static Exp varargs() {
 		return new VarargsExp();
 	}
@@ -87,7 +91,7 @@ public class Exp {
 		case Lua.OP_LT: case Lua.OP_GT: case Lua.OP_LE: case Lua.OP_GE: case Lua.OP_NEQ: case Lua.OP_EQ: return 2;
 		case Lua.OP_CONCAT: return 3;
 		case Lua.OP_ADD: case Lua.OP_SUB: return 4;
-		case Lua.OP_MUL: case Lua.OP_DIV: return 5;
+		case Lua.OP_MUL: case Lua.OP_DIV: case Lua.OP_MOD: return 5;
 		case Lua.OP_NOT: case Lua.OP_UNM: case Lua.OP_LEN: return 6;
 		case Lua.OP_POW: return 7;
 		default: throw new IllegalStateException("precedence of bad op "+op);

src/jse/org/luaj/vm2/ast/NameResolver.java

@@ -91,7 +91,7 @@ public class NameResolver extends Visitor {
 	}
 
 	public void visit(LocalAssign stat) {
-		super.visit(stat);
+		visitExps(stat.values);
 		defineLocalVars( stat.names );
 	}
 

src/jse/org/luaj/vm2/lua2java/JavaCodeGen.java

@@ -317,18 +317,17 @@ public class JavaCodeGen {
 		}
 		
 		public void visit(BinopExp exp) {
+			String lhs = evalLuaValue(exp.lhs) ;
+			String rhs = evalLuaValue(exp.rhs) ; 
 			switch ( exp.op ) {
 			case Lua.OP_AND:
 			case Lua.OP_OR:
-				out(exp.op==Lua.OP_AND? "(!($b=": "(($b=");
-				exp.lhs.accept(this);
-				out(").toboolean()?$b:");
-				exp.rhs.accept(this);
-				out( ")" );
+				String not = (exp.op==Lua.OP_AND? "!": ""); 
+				out("("+not+"($b="+lhs+").toboolean()?$b:"+rhs+")");
 				return;
 				
 			}
-			exp.lhs.accept(this);
+			out( lhs );
 			switch ( exp.op ) {
 			case Lua.OP_ADD: out(".add"); break;
 			case Lua.OP_SUB: out(".sub"); break;
@@ -345,9 +344,7 @@ public class JavaCodeGen {
 			case Lua.OP_CONCAT: out(".concat"); break;
 			default: throw new IllegalStateException("unknown bin op:"+exp.op);
 			}
-			out("(");
-			exp.rhs.accept(this);
-			out(")");
+			out("("+rhs+")");
 		}
 
 		public void visit(UnopExp exp) {
@@ -444,7 +441,7 @@ public class JavaCodeGen {
 			case 0: 
 				out(".method("+evalStringConstant(exp.name)+")"); 
 				break;
-			case 1: case 2: case 3: 
+			case 1: case 2: 
 				out(".method("+evalStringConstant(exp.name)+",");
 				exp.args.accept(this);
 				out(")");
@@ -605,16 +602,19 @@ public class JavaCodeGen {
 
 		public void visit(NumericFor stat) {
 			String javaname = javascope.getJavaName(stat.name.variable);
+			String indexname = stat.name.variable.isupvalue? javaname+"$0": javaname;
 			outi("for ( LuaValue "
-					+javaname+"="+evalLuaValue(stat.initial)+", "
+					+indexname+"="+evalLuaValue(stat.initial)+", "
 					+javaname+"$limit="+evalLuaValue(stat.limit));
 			String stepname = "ONE";
 			if ( stat.step!=null ) 
 				out(", "+(stepname=javaname+"$step")+"="+evalLuaValue(stat.step));
 			outr( "; "
-					+javaname+".testfor_b("+javaname+"$limit,"+stepname+"); "
-					+javaname+"="+javaname+".add("+stepname+") ) {" );
+					+indexname+".testfor_b("+javaname+"$limit,"+stepname+"); "
+					+indexname+"="+indexname+".add("+stepname+") ) {" );
 			addindent();
+			if ( stat.name.variable.isupvalue )
+				this.singleLocalDeclareAssign(stat.name, indexname);
 			super.visit(stat.block);
 			oute( "}" );
 		}

src/jse/org/luaj/vm2/lua2java/JavaScope.java

@@ -56,6 +56,9 @@ public class JavaScope extends NameScope {
 			"char", 	"final", 	"interface", "static", 	"void",
 			"class", 	"finally", 	"long", 	"strictfp", "volatile",
 			"const", 	"float", 	"native", 	"super", 	"while",
+			
+			// java literals
+			"false", 	"null",		"true",	
 	};
 	
 	static {
@@ -101,7 +104,7 @@ public class JavaScope extends NameScope {
 	final private String allocateJavaName(Object astele, String proposal) {
 		for ( int i=0; true; i++ ) {
 			String jname = proposal+(i==0? "": "$"+i);
-			if ( ! javanames.contains(jname) && ! SPECIALS.contains(jname) && !staticnames.contains(jname)  ) {
+			if ( ! isJavanameInScope(jname) && ! SPECIALS.contains(jname) && !staticnames.contains(jname)  ) {
 				javanames.add(jname);
 				astele2javaname.put(astele,jname);
 				return jname;

src/jse/org/luaj/vm2/parser/LuaParser.java

@@ -551,7 +551,7 @@ public class LuaParser implements LuaParserConstants {
       break;
     case NUMBER:
       n = jj_consume_token(NUMBER);
-                                                  {if (true) return Exp.constant(LuaValue.valueOf(Double.valueOf(n.image)));}
+                                                  {if (true) return Exp.numberconstant(n.image);}
       break;
     case LONGSTRING0:
     case LONGSTRING1: