Exception while using ES6 features (template strings) with Nashorn on JDK 9

[Karl Pietrzak]

Any thoughts given to making --language=es6 the default?

On Wed, Apr 26, 2017 at 10:00 AM, Jim Laskey (Oracle) <
james.laskey at oracle.com> wrote:

> You need to specify --language=es6 on the command line
>
> > On Apr 26, 2017, at 10:25 AM, Mohammed Sanaulla <sanaulla123 at gmail.com>
> wrote:
> >
> > Hello All,
> >
> > I am using build b166 of JDK 9.
> >
> > And I tried to run the following code:
> >
> > ScriptEngineManager engineManager = new ScriptEngineManager();
> > ScriptEngine engine = engineManager.getEngineByName("nashorn");
> > engine.eval("function sum(a, b) { return a + b; }");
> > System.out.println(engine.eval("sum(1, 2);"));
> > engine.eval("var name = 'Sanaulla'");
> > System.out.println(engine.eval("print(`Hello Mr. ${name}`)"));
> >
> > The sum(1,2) works fine by printing 3. But the other part i.e using
> > template strings throws the following exception:
> >
> > Exception in thread "main" javax.script.ScriptException: <eval>:1:6
> > Expected an operand but found error
> > print(`Hello Mr. ${name}`)
> >      ^ in <eval> at line number 1 at column number 6
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.
> throwAsScriptException(NashornScriptEngine.java:469)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.
> compileImpl(NashornScriptEngine.java:536)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.
> compileImpl(NashornScriptEngine.java:523)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.api.scripting.
> NashornScriptEngine.evalImpl(NashornScriptEngine.java:401)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.api.scripting.
> NashornScriptEngine.eval(NashornScriptEngine.java:154)
> >        at
> > java.scripting/javax.script.AbstractScriptEngine.eval(
> AbstractScriptEngine.java:264)
> >        at
> > nashorn.demo/com.packt.JavascriptCodeFromJavaDemo.main(
> JavascriptCodeFromJavaDemo.java:13)
> > Caused by: jdk.nashorn.internal.runtime.ParserException: <eval>:1:6
> > Expected an operand but found error
> > print(`Hello Mr. ${name}`)
> >      ^
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.AbstractParser.error(
> AbstractParser.java:297)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.AbstractParser.error(
> AbstractParser.java:282)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.unaryExpression(Parser.java:4443)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.expression(Parser.java:4601)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.conditionalExpression(Parser.java:4753)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.assignmentExpression(Parser.java:4692)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.argumentList(Parser.java:3706)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.leftHandSideExpression(Parser.java:3389)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.unaryExpression(Parser.java:4421)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.expression(Parser.java:4601)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.conditionalExpression(Parser.java:4753)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.assignmentExpression(Parser.java:4692)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.expression(Parser.java:4570)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.expression(Parser.java:4566)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.expressionStatement(Parser.java:1847)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.statement(Parser.java:1155)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.sourceElements(Parser.java:909)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.program(Parser.java:844)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.parse(Parser.java:325)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.parser.
> Parser.parse(Parser.java:285)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.runtime.
> Context.compile(Context.java:1500)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.runtime.
> Context.compileScript(Context.java:1467)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.internal.runtime.
> Context.compileScript(Context.java:750)
> >        at
> > jdk.scripting.nashorn/jdk.nashorn.api.scripting.NashornScriptEngine.
> compileImpl(NashornScriptEngine.java:534)
> >        ... 5 more
> >
> > I even tried running template strings from jjs console, but I am facing
> > same issue.
> >
> > Can someone please guide me in using the ES6 features in Nashorn on JDK9?
> >
> > Regards,
> > Sanaulla
>
>


-- 
Karl