ICU-13415 Adding virtual destructor to internal Interface-like type SymbolProvider.

X-SVN-Rev: 40624

diff --git a/icu4c/source/i18n/number_affixutils.h b/icu4c/source/i18n/number_affixutils.h
index 12c8e001018901cbeb5f930d2df85501038dd4f3..fd76c99b975566614f190193d0b6987dfdb520dd 100644 (file)
--- a/icu4c/source/i18n/number_affixutils.h
+++ b/icu4c/source/i18n/number_affixutils.h
@@ -49,6 +49,8 @@ struct AffixTag {
 // Exported as U_I18N_API because it is a base class for other exported types
 class U_I18N_API SymbolProvider {
   public:
+    virtual ~SymbolProvider() = default;
+
     // TODO: Could this be more efficient if it returned by reference?
     virtual UnicodeString getSymbol(AffixPatternType type) const = 0;
 };