[IDE] Use Identifier for printing member name in generateMemberwiseInit

Avoid relying on the source text and print the identifier, escaping
if needed.

lib/Refactoring/MemberwiseInitLocalRefactoring.cpp

@@ -16,15 +16,23 @@ using namespace swift::refactoring;
 
 namespace {
 struct MemberwiseParameter {
-  CharSourceRange NameRange;
+  Identifier Name;
   Type MemberType;
   Expr *DefaultExpr;
 
-  MemberwiseParameter(CharSourceRange nameRange, Type type, Expr *initialExpr)
+  MemberwiseParameter(Identifier name, Type type, Expr *initialExpr)
-      : NameRange(nameRange), MemberType(type), DefaultExpr(initialExpr) {}
+      : Name(name), MemberType(type), DefaultExpr(initialExpr) {}
 };
 } // namespace
 
+static void printMemberName(Identifier name, llvm::raw_ostream &OS) {
+  if (escapeIdentifierInContext(name, PrintNameContext::TypeMember)) {
+    OS << '`' << name << '`';
+  } else {
+    OS << name;
+  }
+}
+
 static void generateMemberwiseInit(SourceEditConsumer &EditConsumer,
                                    SourceManager &SM,
                                    ArrayRef<MemberwiseParameter> memberVector,
@@ -34,7 +42,8 @@ static void generateMemberwiseInit(SourceEditConsumer &EditConsumer,
   auto insertMember = [&SM](const MemberwiseParameter &memberData,
                             raw_ostream &OS, bool wantsSeparator) {
     {
-      OS << SM.extractText(memberData.NameRange) << ": ";
+      printMemberName(memberData.Name, OS);
+      OS << ": ";
       // Unconditionally print '@escaping' if we print out a function type -
       // the assignments we generate below will escape this parameter.
       if (isa<AnyFunctionType>(memberData.MemberType->getCanonicalType())) {
@@ -73,8 +82,11 @@ static void generateMemberwiseInit(SourceEditConsumer &EditConsumer,
   OS << ") {\n";
   for (auto &member : memberVector) {
     // self.<property> = <property>
-    auto name = SM.extractText(member.NameRange);
+    OS << "self.";
-    OS << "self." << name << " = " << name << "\n";
+    printMemberName(member.Name, OS);
+    OS << " = ";
+    printMemberName(member.Name, OS);
+    OS << "\n";
   }
   OS << "}\n";
 
@@ -104,8 +116,6 @@ collectMembersForInit(ResolvedCursorInfoPtr CursorInfo,
   if (!targetLocation.isValid())
     return SourceLoc();
 
-  SourceManager &SM = nominalDecl->getASTContext().SourceMgr;
-
   for (auto member : nominalDecl->getMemberwiseInitProperties()) {
     auto varDecl = dyn_cast<VarDecl>(member);
     if (!varDecl) {
@@ -130,9 +140,7 @@ collectMembersForInit(ResolvedCursorInfoPtr CursorInfo,
       defaultInit = patternBinding->getOriginalInit(i);
     }
 
-    auto NameRange =
+    memberVector.emplace_back(varDecl->getName(), varDecl->getTypeInContext(),
-        Lexer::getCharSourceRangeFromSourceRange(SM, varDecl->getNameLoc());
-    memberVector.emplace_back(NameRange, varDecl->getTypeInContext(),
                               defaultInit);
   }
 

test/refactoring/MemberwiseInit/Outputs/generate_memberwise/class_members.swift.expected

@@ -44,6 +44,7 @@ struct Place {
   let callback: Callback
   @MyWrapper var wrapped: String
   var `protocol`: String
+  var `some raw identifier`: Int
 }
 
 protocol Thing {

test/refactoring/MemberwiseInit/Outputs/generate_memberwise/only_computed_members.swift.expected

@@ -31,6 +31,7 @@ struct Place {
   let callback: Callback
   @MyWrapper var wrapped: String
   var `protocol`: String
+  var `some raw identifier`: Int
 }
 
 protocol Thing {

test/refactoring/MemberwiseInit/Outputs/generate_memberwise/struct_members.swift.expected

@@ -20,7 +20,7 @@ class Person {
 }
 
 struct Place {
-internal init(person: Person, street: String, apartment: Optional<String> = nil, city: String, state: String, postalCode: Int, plusFour: Int? = nil, callback: @escaping Place.Callback, wrapped: String, `protocol`: String) {
+internal init(person: Person, street: String, apartment: Optional<String> = nil, city: String, state: String, postalCode: Int, plusFour: Int? = nil, callback: @escaping Place.Callback, wrapped: String, `protocol`: String, `some raw identifier`: Int) {
 self.person = person
 self.street = street
 self.apartment = apartment
@@ -31,6 +31,7 @@ self.plusFour = plusFour
 self.callback = callback
 self.wrapped = wrapped
 self.`protocol` = `protocol`
+self.`some raw identifier` = `some raw identifier`
 }
 
   typealias Callback = () -> ()
@@ -44,6 +45,7 @@ self.`protocol` = `protocol`
   let callback: Callback
   @MyWrapper var wrapped: String
   var `protocol`: String
+  var `some raw identifier`: Int
 }
 
 protocol Thing {

test/refactoring/MemberwiseInit/generate_memberwise.swift

@@ -31,6 +31,7 @@ struct Place {
   let callback: Callback
   @MyWrapper var wrapped: String
   var `protocol`: String
+  var `some raw identifier`: Int
 }
 
 protocol Thing {
@@ -58,9 +59,9 @@ struct MyWrapper {
 // RUN: %refactor -memberwise-init -source-filename %s -pos=22:8 > %t.result/struct_members.swift
 // RUN: diff -u %S/Outputs/generate_memberwise/struct_members.swift.expected %t.result/struct_members.swift
 
-// RUN: %refactor -memberwise-init -source-filename %s -pos=44:8 > %t.result/only_computed_members.swift
+// RUN: %refactor -memberwise-init -source-filename %s -pos=45:8 > %t.result/only_computed_members.swift
 // RUN: diff -u %S/Outputs/generate_memberwise/only_computed_members.swift.expected %t.result/only_computed_members.swift
 
-// RUN: not %refactor -memberwise-init -source-filename %s -pos=36:10 > %t.result/protocol_members.swift
+// RUN: not %refactor -memberwise-init -source-filename %s -pos=37:10 > %t.result/protocol_members.swift
-// RUN: not %refactor -memberwise-init -source-filename %s -pos=40:6 > %t.result/enum_members.swift
+// RUN: not %refactor -memberwise-init -source-filename %s -pos=41:6 > %t.result/enum_members.swift