有人能解释一下 patch 关键字的作用吗?例如,在
math_patch.dart
我看到
patch num pow(num x, num exponent) => MathNatives.pow(x, exponent);
patch double atan2(num a, num b) => MathNatives.atan2(a, b);
patch double sin(num x) => MathNatives.sin(x);
patch double cos(num x) => MathNatives.cos(x);
这是什么意思?文件有什么_patch.dart
用?