Using the Filter Pushdown pattern, we would first match a pattern in the graph, then modify the tree at the point of the match. Here's the Filter Pushdown pattern to match.

我们将首先利用Filter Pushdown模式来匹配图中的某个模式，随后在匹配的点对树进行修改。

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So as well as being able to pattern match over values, such as integers, floating point Numbers and strings, we are also able to pattern match over an objects type.

所以正如能够匹配很多值一样，我们也能够匹配很多对象类型，如：整数、浮点数和字符串。

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If the pattern is found, the edit point is moved to the beginning of the match.

如果找到了模式，编辑点就移动到匹配项的开始处。

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