编译时约束以实现完全模式匹配 [英] Compile-time constraint for complete pattern match

问题描述

我正在寻找模式匹配不完整的警告编号。有人知道这是什么吗？

I'm looking for the warning number for incomplete pattern matches. Anyone know what it is?

更全面地讲，我想使FSC.EXE返回不完整的模式匹配作为编译时错误，而不是警告+运行时异常。有人知道这个的警告号码是什么吗？具体来说，这与已编译的.fs /交互式FSI .fsx REPL交互有关。

More fully, I want to make FSC.EXE return incomplete pattern matches as compile-time errors rather than warnings + run-time exceptions. Does anyone know what the warning number for this is? Specifically, this relates to compiled .fs / interactive FSI .fsx REPL interaction.

警告：

Incomplete pattern matches on this expression. For example, the value 'LaLaLa (_)' may indicate a case not covered by the pattern(s).   

如何自定义：

请参见 --warnaserror [+ |-] []

see "--warnaserror[+|-] []"

参考： https://msdn.microsoft.com/zh-CN/library/dd233171（v = vs.140）.aspx

推荐答案

使用-warnaserror +：25

要知道是哪一个，我只是使用 let f（Some x）= x 发出了警告，这给了我警告FS0025：不完整的模式与此表达式匹配。对于e
示例，值 None可能表示模式未涵盖的情况。

To know which one it was I simply produced myself the warning using let f (Some x) = x which gaves me warning FS0025: Incomplete pattern matches on this expression. For e xample, the value 'None' may indicate a case not covered by the pattern(s).

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