评估Groovy中的赋值表达式 [英] evaluate an assignment expression in Groovy

问题描述

我有一个表达式，例如：

pre $ def $ exp $ ='anything =something'

code>

在我的情况中，上面的字符串来自Web服务，但它可能来自任何地方。我想对此进行评估，以便最终得到具有某些值的变量anything，例如：

  assert anything ==something
  

到目前为止我试过：

  def anything 
 Eval.me（expr）//`anything`结束为空
  

我从SO上读到的东西：

  def what 
 Eval.me（expr.inspect（））//同样的东西：`anything`结束null 
  

还试过：

  def anything 
 expr.execute（）//抱怨：Executable name has嵌入式报价，分割参数
  

这可以做到吗？
<您可以使用 GroovyShell ，看一看：

解决方案

/ b>

  def expr ='anything =something'
 
 def binding = new Binding（）
 def groovyShell = new G roovyShell（绑定）
 groovyShell.evaluate（expr）
 
 assert binding.getVariable（'anything'）==something
  

I have an expression such as:

def expr = 'anything="something"'

In my case the above string comes from a web service, but it could be from anywhere. I would like to evaluate this so that I end up with the variable "anything" that has a value of "something", such that:

assert anything=="something"

So far I tried:

def anything
Eval.me(expr)    // `anything` ends up null

From stuff I read on SO:

def anything
Eval.me(expr.inspect())    // same thing: `anything` ends up null

Also tried:

def anything
expr.execute()    // complains: "Executable name has embedded quote, split the arguments"

Can this be done?

解决方案

You can use GroovyShell, take a look:

def expr = 'anything = "something"'

def binding = new Binding()
def groovyShell = new GroovyShell(binding)
groovyShell.evaluate(expr)

assert binding.getVariable('anything') == "something"

这篇关于评估Groovy中的赋值表达式的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！