add senses to list of breaking changes (#1545)

* add senses to list of breaking changes * clarify Min/Max in objective macros
jump-dev · Oct 12, 2018 · 906e982 · 906e982
1 parent 7c15768
commit 906e982
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diff --git a/NEWS.md b/NEWS.md
@@ -64,6 +64,12 @@ Breaking changes:
   forms and second-order cone constraints. Support for these
   constraint classes depends on the solver.
 
+- The symbols `:Min` and `:Max` are no longer used as optimization senses.
+  Instead, JuMP uses the `OptimizationSense` enum from MathOptInterface.
+  `@objective(model, Max, ...)`, `@objective(model, Min, ...)`,
+  `@NLobjective(model, Max, ...)`, and `@objective(model, Min, ...)` remain
+  valid, but `@objective(m, :Max, ...)` is no longer accepted.
+
 New features:
 
 - Support for deleting constraints and variables.