I'm trying to set a negative literal in my NVelocity template and it doesn't parse. Is there a trick to making this work?
numbers work: 数起作用:
#set($age = 27)
numbers do not work: 不起作用:
#set($age = -27)
#set($age = 27*-1)
Lexical error: NVelocity.Runtime.Parser.TokenMgrError: Lexical error at line 62, column 15. Encountered: "-"
I'm using Castle.NVelocity (dll-AssemblyVersion 1.1.1.0, FileVersion=1.1.1.60), not the older Apache release
Could you please provide a failing unit test because negative literals work for me. I used the HEAD of our NVelocity source repository, however I am not aware of any changes in that area since 1.1.1 was released. If my unit test fails for you with that build, I can look into when this was fixed if you like.
[Test]
public void NegativeLiterals()
{
Assert.AreEqual("-27", Eval("#set($result = -27)\r\n$result"));
Assert.AreEqual("-27", Eval("#set($result = 27 * -1)\r\n$result"));
Assert.AreEqual("-27", Eval("#set($result = 27*-1)\r\n$result"));
Assert.AreEqual("27", Eval("#set($result = -27*-1)\r\n$result"));
}
private string Eval(string template)
{
VelocityEngine velocityEngine = new VelocityEngine();
velocityEngine.Init();
using (StringWriter sw = new StringWriter())
{
bool ok = velocityEngine.Evaluate(new VelocityContext(), sw, "", template);
Assert.IsTrue(ok, "Evaluation returned failure");
return sw.ToString();
}
}
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