math_opt: fix xpress_solver build on windows

Mizux · Mizux · commit c0b5917c077e · 2025-12-15T13:08:16.000+01:00
diff --git a/ortools/math_opt/solvers/xpress_solver.cc b/ortools/math_opt/solvers/xpress_solver.cc
@@ -102,8 +102,7 @@ class ScopedCallback {
       if constexpr (std::is_convertible_v<R, int>) return static_cast<int>(1);
     }
   };
-  static constexpr proto_type low_level_cb =
-      ExWrapper<proto_type>::low_level_cb;
+  const proto_type low_level_cb = ExWrapper<proto_type>::low_level_cb;
 
  public:
   CbT or_tools_cb;

Original file line number	Diff line number	Diff line change
`@@ -102,8 +102,7 @@ class ScopedCallback {`
`102`	`102`	`if constexpr (std::is_convertible_v<R, int>) return static_cast<int>(1);`
`103`	`103`	`}`
`104`	`104`	`};`
`105`		`- static constexpr proto_type low_level_cb =`
`106`		`- ExWrapper<proto_type>::low_level_cb;`
	`105`	`+ const proto_type low_level_cb = ExWrapper<proto_type>::low_level_cb;`
`107`	`106`
`108`	`107`	`public:`
`109`	`108`	`CbT or_tools_cb;`