type-number: fix clang-tidy modernize-use-nullptr error

ryanofsky · ryanofsky · commit ae4f1dc2bb1a · 2025-06-19T22:26:31.000-04:00
include/mp/type-number.h:53:77: error: use nullptr [modernize-use-nullptr,-warnings-as-errors]
   53 |     typename std::enable_if&lt;std::is_enum&lt;LocalType&gt;::value&gt;::type* enable = 0)
      |                                                                             ^
      |                                                                             nullptr
diff --git a/include/mp/type-number.h b/include/mp/type-number.h
@@ -50,7 +50,7 @@ decltype(auto) CustomReadField(TypeList<LocalType>,
     InvokeContext& invoke_context,
     Input&& input,
     ReadDest&& read_dest,
-    typename std::enable_if<std::is_enum<LocalType>::value>::type* enable = 0)
+    typename std::enable_if<std::is_enum<LocalType>::value>::type* enable = nullptr)
 {
     return read_dest.construct(static_cast<LocalType>(input.get()));
 }

Original file line number	Diff line number	Diff line change
`@@ -50,7 +50,7 @@ decltype(auto) CustomReadField(TypeList<LocalType>,`
`50`	`50`	`InvokeContext& invoke_context,`
`51`	`51`	`Input&& input,`
`52`	`52`	`ReadDest&& read_dest,`
`53`		`- typename std::enable_if<std::is_enum<LocalType>::value>::type* enable = 0)`
	`53`	`+ typename std::enable_if<std::is_enum<LocalType>::value>::type* enable = nullptr)`
`54`	`54`	`{`
`55`	`55`	`return read_dest.construct(static_cast<LocalType>(input.get()));`
`56`	`56`	`}`