[darwin] Rename variables to avoid shadow declarations

Per GCC_WARN_SHADOW.

1 files changed, 5 insertions, 5 deletions

diff --git a/platform/darwin/src/NSExpression+MGLAdditions.mm b/platform/darwin/src/NSExpression+MGLAdditions.mm
index 0d6b74e93c..04152afffd 100644
--- a/platform/darwin/src/NSExpression+MGLAdditions.mm
+++ b/platform/darwin/src/NSExpression+MGLAdditions.mm
@@ -1117,14 +1117,14 @@ NSArray *MGLSubexpressionsWithJSONObjects(NSArray *objects) {
                             format:@"Casting expression to %@ not yet implemented.", type];
             } else if ([function isEqualToString:@"MGL_FUNCTION"] ||
                        [function isEqualToString:@"MGL_FUNCTION:"]) {
-                NSExpression *op = self.arguments.firstObject;
-                if (op.expressionType == NSConstantValueExpressionType
-                    && [op.constantValue isEqualToString:@"collator"]) {
+                NSExpression *firstOp = self.arguments.firstObject;
+                if (firstOp.expressionType == NSConstantValueExpressionType
+                    && [firstOp.constantValue isEqualToString:@"collator"]) {
                     // Avoid wrapping collator options object in literal expression.
                     return @[@"collator", self.arguments[1].constantValue];
                 }
-                if (op.expressionType == NSConstantValueExpressionType
-                    && [op.constantValue isEqualToString:@"format"]) {
+                if (firstOp.expressionType == NSConstantValueExpressionType
+                    && [firstOp.constantValue isEqualToString:@"format"]) {
                     // Avoid wrapping format options object in literal expression.
                     return @[@"format", self.arguments[1].mgl_jsonExpressionObject, self.arguments[2].constantValue];
                 }