Method run

src/bsh/Interpreter.java:433–574

Run interactively. (printing prompts, etc.)

()

		Run interactively.  (printing prompts, etc.)
	*/
	public void run() 
	{
		if(evalOnly)
			throw new RuntimeException("bsh Interpreter: No stream");

		/*
		  We'll print our banner using eval(String) in order to
		  exercise the parser and get the basic expression classes loaded...
		  This ameliorates the delay after typing the first statement.
		*/
		if ( interactive )
			try { 
				eval("printBanner();"); 
			} catch ( EvalError e ) {
				println(
					"BeanShell " + VERSION + " - https://github.com/beanshell/beanshell");
			}

		// init the callstack.  
		CallStack callstack = new CallStack( globalNameSpace );

		SimpleNode node = null;
		boolean eof = false;
		while( !eof )
		{
			try
			{
				// try to sync up the console
				System.out.flush();
				System.err.flush();
				Thread.yield();  // this helps a little

				if ( interactive )
					print( getBshPrompt() );

				eof = Line();

				if( get_jjtree().nodeArity() > 0 )  // number of child nodes 
				{
					if( node != null )
						node.lastToken.next = null;  // prevent OutOfMemoryError

					node = (SimpleNode)(get_jjtree().rootNode());

					if(DEBUG)
						node.dump(">");

					Object ret = node.eval( callstack, this );

					node.lastToken.next = null;  // prevent OutOfMemoryError
				
					// sanity check during development
					if ( callstack.depth() > 1 )
						throw new InterpreterError(
							"Callstack growing: "+callstack);

					if(ret instanceof ReturnControl)
						ret = ((ReturnControl)ret).value;