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去掉无效字符 -_# #31

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去掉无效字符 -_# #31

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Expand Up @@ -29,7 +29,7 @@ swtich (Z_TYPE_P(zv)) {
####为什么?
那么既然这种新类型会带来这么多问题, 那么当时为什么要用把引用变成一种类型呢? 为什么不还是使用一个标志位呢?

一句话来说, 就是我们不得不这么做. -_#
一句话来说, 就是我们不得不这么做.

前面说到, Hashtable直接存储的是zval, 这样在符号表中, 俩个zval如何共用一个数值呢? 对于字符串等复杂类型来说还好, 我们貌似可以在`zend_refcounted`结构中加入一个标志位来表明是引用来解决, 然而这个也会遇到Change On Write带来的复制, 但是我们知道在PHP7中, 一些类型是直接存储在zval中的, 比如`IS_LONG`, 但是引用类型是需要引用计数的, 那么对于一个是`IS_LONG`并且又是`IS_REFERNCE`的zval该如何表示呢?

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