Renamed fieldNumber to tupleIndex in AST & Sema

Author: Toma91

include/swift/AST/Expr.h

@@ -4849,7 +4849,7 @@ class KeyPathExpr : public Expr {
 
     union {
       unsigned SubscriptSize;
-      unsigned FieldNumber;
+      unsigned TupleIndex;
     } technicated;
 
     Kind KindValue;
@@ -5128,10 +5128,10 @@ class KeyPathExpr : public Expr {
       llvm_unreachable("unhandled kind");
     }
 
-    unsigned getFieldNumber() const {
+    unsigned getTupleIndex() const {
       switch (getKind()) {
         case Kind::TupleElement:
-          return technicated.FieldNumber;
+          return technicated.TupleIndex;
 
         case Kind::Invalid:
         case Kind::UnresolvedProperty:

lib/AST/ASTDumper.cpp

@@ -2620,7 +2620,7 @@ class PrintExpr : public ExprVisitor<PrintExpr> {
         break;
       case KeyPathExpr::Component::Kind::TupleElement:
         OS << "tuple_element ";
-        OS << "#" << component.getFieldNumber();
+        OS << "#" << component.getTupleIndex();
         OS << " ";
         break;
       }

lib/AST/Expr.cpp

@@ -2200,7 +2200,7 @@ KeyPathExpr::Component::Component(ASTContext *ctxForCopyingLabels,
     ? nullptr : indexHashables.data();
 
   if (subscriptLabels.empty()) {
-    technicated.FieldNumber = fieldNumber;
+    technicated.TupleIndex = fieldNumber;
   } else {
     technicated.SubscriptSize = subscriptLabels.size();
   }