util/StringWithHash: add nullptr constructor

CM4all · Jan 22, 2025 · 5e2c8fb · 5e2c8fb
1 parent 5495591
commit 5e2c8fb
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/src/util/StringWithHash.hxx b/src/util/StringWithHash.hxx
@@ -26,6 +26,17 @@ struct StringWithHash {
 	explicit constexpr StringWithHash(std::string_view _value, std::size_t _hash) noexcept
 		:hash(_hash), value(_value) {}
 
+	/**
+	 * Construct a "nulled" instance, i.e. one where IsNull()
+	 * returns true.
+	 */
+	explicit constexpr StringWithHash(std::nullptr_t) noexcept
+		:value() {}
+
+	constexpr bool IsNull() const noexcept {
+		return value.data() == nullptr;
+	}
+
 	constexpr bool operator==(const StringWithHash &) const noexcept = default;
 };