blocks|key|1050834|text|如果将isInstanceOf/asInstanceOf视为反射，则模式匹配依赖于它们|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1050835|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you consider isInstanceOf/asInstanceOf as reflection, then pattern matching relies on them

blocks|key|1050902|text|它不是一种语言构造，但ScalaTest包含Suite.execute，它使用反射来查找和调用测试方法。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1050903|Scala的pattern+matching是否在幕后使用了任何反射？|1050904|entityMap|0|LINK|mutability|MUTABLE|url|http://www.scalatest.org/scaladoc/doc-1.2/org/scalatest/Suite.html|1|http://www.scala-lang.org/node/120^0|M|D|M|D|0|0|6|G|1|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@$9|U|A|V|1|W]]|E|$]]|$1|F|3|G|5|6|7|X|8|@]|D|@$9|Y|A|Z|1|10]]|E|$]]|$1|H|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]|P|$5|K|L|M|E|$N|Q]]]]

It's not a language construct, but ScalaTest includes <a href="http://www.scalatest.org/scaladoc/doc-1.2/org/scalatest/Suite.html" rel="nofollow"><code>Suite.execute</code></a>, which uses reflection to find and invoke test methods.

Does Scala's <a href="http://www.scala-lang.org/node/120" rel="nofollow">pattern matching</a> use any reflection behind the scenes?

blocks|key|1050956|text|结构类型中的方法调用依赖于反射：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1050957|type+T+=+{+def+startsWith(x:String):Boolean+}
def+doSomethingWith(x:T)+=+x.startsWith("abc")
doSomethingWith("abcdef")|code-block|syntax|javascript|1050958|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Method invocation in structural types depends on reflection:

<pre><code>type T = { def startsWith(x:String):Boolean }
def doSomethingWith(x:T) = x.startsWith("abc")
doSomethingWith("abcdef")
</code></pre>

blocks|key|836271|text|枚举使用反射来查找nameOf函数的枚举的所有可能值。(请参阅Enumeration.scala中的populateNameMap方法)。这是在第一次为特定的Enumeration类型调用nameOf时完成的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|836272|entityMap|0|LINK|mutability|MUTABLE|url|https://lampsvn.epfl.ch/trac/scala/browser/scala/tags/R_2_8_1_final/src/library/scala/Enumeration.scala^0|9|6|1E|F|27|B|2M|6|V|H|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|C]|$9|U|A|V|B|C]]|D|@$9|W|A|X|1|Y]]|E|$]]|$1|F|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

Enumerations use reflection to find out about all of the possible values for the enumeration for the <code>nameOf</code> function. (See the <code>populateNameMap</code> method in <a href="https://lampsvn.epfl.ch/trac/scala/browser/scala/tags/R_2_8_1_final/src/library/scala/Enumeration.scala" rel="nofollow">Enumeration.scala</a>). This is done once, the first time you call <code>nameOf</code> for a particular <code>Enumeration</code> type.

blocks|key|836327|text|这与结构类型密切相关，但任何匿名对象实例，即|type|unstyled|depth|inlineStyleRanges|entityRanges|data|836328|new+{+def+print+=+("hello+world")+}.print|code-block|syntax|javascript|836329|将使用反射。|836330|http://scala-programming-language.1934581.n4.nabble.com/Structural-types-reflection-td3071599.html|offset|length|836331|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|2Q|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|U|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|V|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|W|8|@]|9|@$K|X|L|Y|1|Z]]|A|$]]|$1|M|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|J]]]]

This is closely related to structural types, but any anonymous object instance, ie

<pre><code>new { def print = ("hello world") }.print
</code></pre>

will use reflection. 

<a href="http://scala-programming-language.1934581.n4.nabble.com/Structural-types-reflection-td3071599.html" rel="noreferrer">http://scala-programming-language.1934581.n4.nabble.com/Structural-types-reflection-td3071599.html</a>

blocks|key|836359|text|Scala解释器大量使用反射。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|836360|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

The Scala interpreter makes very heavy use of reflection.

It is a well known fact that structural types are implemented through reflection. Are there maybe any other language constructs which use reflection?

Which Scala features are internally implemented using reflection?

解释器

结构类型是通过反射实现的，这是众所周知的事实。有没有其他使用反射的语言结构？

问哪些Scala特性是使用反射在内部实现的？
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