NAnt属性:: exists（）与新定义的属性？(NAnt property::exists() with newly defined property?)

 在NAnt 0.92中，我定义了一个属性，并在检查后立即存在。 它不存在......但它存在于被调用的目标中。 这是一个错误还是一个功能？！？ 我在文档中搜索但找不到它。 
 
<target name="test">
  <property name="testprop" value="test value" />

  <echo message="property value = ${testprop}" />

  <if test="${property::exists(testprop)}">
     <echo message="property exists, as it should!" />
  </if>

  <if test="${not property::exists(testprop)}">
     <echo message="property doesn't exists... WTF?" />
  </if>

  <call target="test2" />
</target>

<target name="test2">
  <echo message="property value in sub-target = ${testprop}" />
</target>
 
 输出： 
 
 测试： 
 
 [echo] property value = test value
 [echo] property doesn't exists... WTF?
 
 测试2： 
 
 [echo] property value in sub-target = test value

In NAnt 0.92, I define a property and immediately after checks it's existence. It doesn't exists... but it exists in a called target. Is this a bug or a feature?!? I search in the documentation but could not find a mention of it.
 
<target name="test">
  <property name="testprop" value="test value" />

  <echo message="property value = ${testprop}" />

  <if test="${property::exists(testprop)}">
     <echo message="property exists, as it should!" />
  </if>

  <if test="${not property::exists(testprop)}">
     <echo message="property doesn't exists... WTF?" />
  </if>

  <call target="test2" />
</target>

<target name="test2">
  <echo message="property value in sub-target = ${testprop}" />
</target>
 
Output:
 
test:
 
 [echo] property value = test value
 [echo] property doesn't exists... WTF?
 
test2:
 
 [echo] property value in sub-target = test value

原文：https://stackoverflow.com/questions/15168112