fix: printer of optiminstance errored when the search space was empty (…

…#209)
mlr-org · Sep 27, 2023 · 4691266 · 4691266
1 parent fba6087
commit 4691266
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diff --git a/NEWS.md b/NEWS.md
@@ -1,5 +1,7 @@
 # bbotk 0.7.2.9000
 
+* fix: `OptimInstance$print()` errored when the search space was empty.
+
 # bbotk 0.7.2
 
 * fix: Standalone `Tuner` and `FSelector` were rejected by `ContextOptimization`.

diff --git a/R/OptimInstance.R b/R/OptimInstance.R
@@ -102,8 +102,12 @@ OptimInstance = R6Class("OptimInstance",
       catf(format(self))
       catf(str_indent("* State: ", if (is.null(private$.result)) "Not optimized" else "Optimized"))
       catf(str_indent("* Objective:", format(self$objective)))
-      catf("* Search Space:")
-      print(as.data.table(self$search_space)[, c("id", "class", "lower", "upper", "nlevels"), with = FALSE])
+      if (!self$search_space$length) {
+        catf("* Search Space: Empty")
+      } else {
+        catf("* Search Space:")
+        print(as.data.table(self$search_space)[, c("id", "class", "lower", "upper", "nlevels"), with = FALSE])
+      }
       catf(str_indent("* Terminator:", format(self$terminator)))
       if (!is.null(private$.result)) {
         catf("* Result:")