Parse: Replace polymorphic functor objects with lambdas and llvm::function_ref.

No change in functionality.

llvm-svn: 217025

1 files changed, 15 insertions, 23 deletions

diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index b51b742f9da..53e3dbea81f 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -3235,14 +3235,15 @@ void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
 ///         declarator[opt] ':' constant-expression
 /// [GNU]   declarator[opt] ':' constant-expression attributes[opt]
 ///
-void Parser::
-ParseStructDeclaration(ParsingDeclSpec &DS, FieldCallback &Fields) {
+void Parser::ParseStructDeclaration(
+    ParsingDeclSpec &DS,
+    llvm::function_ref<void(ParsingFieldDeclarator &)> FieldsCallback) {
 
   if (Tok.is(tok::kw___extension__)) {
     // __extension__ silences extension warnings in the subexpression.
     ExtensionRAIIObject O(Diags);  // Use RAII to do this.
     ConsumeToken();
-    return ParseStructDeclaration(DS, Fields);
+    return ParseStructDeclaration(DS, FieldsCallback);
   }
 
   // Parse the common specifier-qualifiers-list piece.
@@ -3289,7 +3290,7 @@ ParseStructDeclaration(ParsingDeclSpec &DS, FieldCallback &Fields) {
     MaybeParseGNUAttributes(DeclaratorInfo.D);
 
     // We're done with this declarator;  invoke the callback.
-    Fields.invoke(DeclaratorInfo);
+    FieldsCallback(DeclaratorInfo);
 
     // If we don't have a comma, it is either the end of the list (a ';')
     // or an error, bail out.
@@ -3353,28 +3354,19 @@ void Parser::ParseStructUnionBody(SourceLocation RecordLoc,
     }
 
     if (!Tok.is(tok::at)) {
-      struct CFieldCallback : FieldCallback {
-        Parser &P;
-        Decl *TagDecl;
-        SmallVectorImpl<Decl *> &FieldDecls;
-
-        CFieldCallback(Parser &P, Decl *TagDecl,
-                       SmallVectorImpl<Decl *> &FieldDecls) :
-          P(P), TagDecl(TagDecl), FieldDecls(FieldDecls) {}
-
-        void invoke(ParsingFieldDeclarator &FD) override {
-          // Install the declarator into the current TagDecl.
-          Decl *Field = P.Actions.ActOnField(P.getCurScope(), TagDecl,
-                              FD.D.getDeclSpec().getSourceRange().getBegin(),
-                                                 FD.D, FD.BitfieldSize);
-          FieldDecls.push_back(Field);
-          FD.complete(Field);
-        }
-      } Callback(*this, TagDecl, FieldDecls);
+      auto CFieldCallback = [&](ParsingFieldDeclarator &FD) {
+        // Install the declarator into the current TagDecl.
+        Decl *Field =
+            Actions.ActOnField(getCurScope(), TagDecl,
+                               FD.D.getDeclSpec().getSourceRange().getBegin(),
+                               FD.D, FD.BitfieldSize);
+        FieldDecls.push_back(Field);
+        FD.complete(Field);
+      };
 
       // Parse all the comma separated declarators.
       ParsingDeclSpec DS(*this);
-      ParseStructDeclaration(DS, Callback);
+      ParseStructDeclaration(DS, CFieldCallback);
     } else { // Handle @defs
       ConsumeToken();
       if (!Tok.isObjCAtKeyword(tok::objc_defs)) {