@@ -179,27 +179,27 @@ CEL_INTERNAL_TERNARY_OPERATORS_ENUM(CEL_TERNARY_OPERATOR)
179179absl::optional<Operator> Operator::FindByName (absl::string_view input) {
180180 absl::call_once (operators_once_flag, InitializeOperators);
181181 if (input.empty ()) {
182- return absl ::nullopt ;
182+ return std ::nullopt ;
183183 }
184184 auto it =
185185 std::lower_bound (operators_by_name.cbegin (), operators_by_name.cend (),
186186 input, OperatorDataNameComparer{});
187187 if (it == operators_by_name.cend () || (*it)->name != input) {
188- return absl ::nullopt ;
188+ return std ::nullopt ;
189189 }
190190 return Operator (*it);
191191}
192192
193193absl::optional<Operator> Operator::FindByDisplayName (absl::string_view input) {
194194 absl::call_once (operators_once_flag, InitializeOperators);
195195 if (input.empty ()) {
196- return absl ::nullopt ;
196+ return std ::nullopt ;
197197 }
198198 auto it = std::lower_bound (operators_by_display_name.cbegin (),
199199 operators_by_display_name.cend (), input,
200200 OperatorDataDisplayNameComparer{});
201201 if (it == operators_by_name.cend () || (*it)->display_name != input) {
202- return absl ::nullopt ;
202+ return std ::nullopt ;
203203 }
204204 return Operator (*it);
205205}
@@ -208,13 +208,13 @@ absl::optional<UnaryOperator> UnaryOperator::FindByName(
208208 absl::string_view input) {
209209 absl::call_once (operators_once_flag, InitializeOperators);
210210 if (input.empty ()) {
211- return absl ::nullopt ;
211+ return std ::nullopt ;
212212 }
213213 auto it = std::lower_bound (unary_operators_by_name.cbegin (),
214214 unary_operators_by_name.cend (), input,
215215 OperatorDataNameComparer{});
216216 if (it == unary_operators_by_name.cend () || (*it)->name != input) {
217- return absl ::nullopt ;
217+ return std ::nullopt ;
218218 }
219219 return UnaryOperator (*it);
220220}
@@ -223,14 +223,14 @@ absl::optional<UnaryOperator> UnaryOperator::FindByDisplayName(
223223 absl::string_view input) {
224224 absl::call_once (operators_once_flag, InitializeOperators);
225225 if (input.empty ()) {
226- return absl ::nullopt ;
226+ return std ::nullopt ;
227227 }
228228 auto it = std::lower_bound (unary_operators_by_display_name.cbegin (),
229229 unary_operators_by_display_name.cend (), input,
230230 OperatorDataDisplayNameComparer{});
231231 if (it == unary_operators_by_display_name.cend () ||
232232 (*it)->display_name != input) {
233- return absl ::nullopt ;
233+ return std ::nullopt ;
234234 }
235235 return UnaryOperator (*it);
236236}
@@ -239,13 +239,13 @@ absl::optional<BinaryOperator> BinaryOperator::FindByName(
239239 absl::string_view input) {
240240 absl::call_once (operators_once_flag, InitializeOperators);
241241 if (input.empty ()) {
242- return absl ::nullopt ;
242+ return std ::nullopt ;
243243 }
244244 auto it = std::lower_bound (binary_operators_by_name.cbegin (),
245245 binary_operators_by_name.cend (), input,
246246 OperatorDataNameComparer{});
247247 if (it == binary_operators_by_name.cend () || (*it)->name != input) {
248- return absl ::nullopt ;
248+ return std ::nullopt ;
249249 }
250250 return BinaryOperator (*it);
251251}
@@ -254,14 +254,14 @@ absl::optional<BinaryOperator> BinaryOperator::FindByDisplayName(
254254 absl::string_view input) {
255255 absl::call_once (operators_once_flag, InitializeOperators);
256256 if (input.empty ()) {
257- return absl ::nullopt ;
257+ return std ::nullopt ;
258258 }
259259 auto it = std::lower_bound (binary_operators_by_display_name.cbegin (),
260260 binary_operators_by_display_name.cend (), input,
261261 OperatorDataDisplayNameComparer{});
262262 if (it == binary_operators_by_display_name.cend () ||
263263 (*it)->display_name != input) {
264- return absl ::nullopt ;
264+ return std ::nullopt ;
265265 }
266266 return BinaryOperator (*it);
267267}
@@ -270,13 +270,13 @@ absl::optional<TernaryOperator> TernaryOperator::FindByName(
270270 absl::string_view input) {
271271 absl::call_once (operators_once_flag, InitializeOperators);
272272 if (input.empty ()) {
273- return absl ::nullopt ;
273+ return std ::nullopt ;
274274 }
275275 auto it = std::lower_bound (ternary_operators_by_name.cbegin (),
276276 ternary_operators_by_name.cend (), input,
277277 OperatorDataNameComparer{});
278278 if (it == ternary_operators_by_name.cend () || (*it)->name != input) {
279- return absl ::nullopt ;
279+ return std ::nullopt ;
280280 }
281281 return TernaryOperator (*it);
282282}
@@ -285,14 +285,14 @@ absl::optional<TernaryOperator> TernaryOperator::FindByDisplayName(
285285 absl::string_view input) {
286286 absl::call_once (operators_once_flag, InitializeOperators);
287287 if (input.empty ()) {
288- return absl ::nullopt ;
288+ return std ::nullopt ;
289289 }
290290 auto it = std::lower_bound (ternary_operators_by_display_name.cbegin (),
291291 ternary_operators_by_display_name.cend (), input,
292292 OperatorDataDisplayNameComparer{});
293293 if (it == ternary_operators_by_display_name.cend () ||
294294 (*it)->display_name != input) {
295- return absl ::nullopt ;
295+ return std ::nullopt ;
296296 }
297297 return TernaryOperator (*it);
298298}
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