Method evalBlock

src/bsh/BSHBlock.java:79–135

( 
		CallStack callstack, Interpreter interpreter, 
		boolean overrideNamespace, NodeFilter nodeFilter )

	}

	Object evalBlock( 
		CallStack callstack, Interpreter interpreter, 
		boolean overrideNamespace, NodeFilter nodeFilter ) 
		throws EvalError
	{	
		Object ret = Primitive.VOID;
		NameSpace enclosingNameSpace = null;
		if ( !overrideNamespace ) 
		{
			enclosingNameSpace= callstack.top();
			BlockNameSpace bodyNameSpace = 
				new BlockNameSpace( enclosingNameSpace );

			callstack.swap( bodyNameSpace );
		}

		int startChild = isSynchronized ? 1 : 0;
		int numChildren = jjtGetNumChildren();

		try {
			/*
				Evaluate block in two passes: 
				First do class declarations then do everything else.
			*/
			for(int i=startChild; i<numChildren; i++)
			{
				SimpleNode node = ((SimpleNode)jjtGetChild(i));

				if ( nodeFilter != null && !nodeFilter.isVisible( node ) )
					continue;

				if ( node instanceof BSHClassDeclaration )
					node.eval( callstack, interpreter );
			}
			for(int i=startChild; i<numChildren; i++)
			{
				SimpleNode node = ((SimpleNode)jjtGetChild(i));
				if ( node instanceof BSHClassDeclaration )
					continue;

				// filter nodes
				if ( nodeFilter != null && !nodeFilter.isVisible( node ) )
					continue;

				ret = node.eval( callstack, interpreter );

				// statement or embedded block evaluated a return statement
				if ( ret instanceof ReturnControl )
					break;
			}
		} finally {
			// make sure we put the namespace back when we leave.
			if ( !overrideNamespace ) 
				callstack.swap( enclosingNameSpace );
		}
		return ret;
	}