[clang-tidy] Make 'modernize-pass-by-value' fix work on header files.

[alexfh]

LG. Thanks!

test/clang-tidy/modernize-pass-by-value-header.cpp

1

This might need // REQUIRES: shell (please find other tests using cp to check this).

clang-tidy/modernize/PassByValueCheck.cpp

for (const ParmVarDecl *ParmDecl : collectParamDecls(Ctor, ParamDecl)) {
     Diag << FixItHint::CreateReplacement(TypeRange, ValueStr);
   }
 
   // Use std::move in the initialization list.
   Diag << FixItHint::CreateInsertion(Initializer->getRParenLoc(), ")")
        << FixItHint::CreateInsertion(
               Initializer->getLParenLoc().getLocWithOffset(1), "std::move(");
 
-  auto Insertion =
-      Inserter->CreateIncludeInsertion(SM.getMainFileID(), "utility",
-                                       /*IsAngled=*/true);
-  if (Insertion.hasValue())
-    Diag << Insertion.getValue();
+  if (auto IncludeFixit = Inserter->CreateIncludeInsertion(
+          Result.SourceManager->getFileID(Initializer->getSourceLocation()),
+          "utility",
+          /*IsAngled=*/true)) {
+    Diag << *IncludeFixit;
+  }
 }
 
 } // namespace modernize
 } // namespace tidy
 } // namespace clang

test/clang-tidy/Inputs/modernize-pass-by-value/header.h

+class ThreadId {
+};
+
+struct A {
+  A(const ThreadId &tid) : threadid(tid) {}
+  ThreadId threadid;
+};

test/clang-tidy/modernize-pass-by-value-header.cpp

+// RUN: cp %S/Inputs/modernize-pass-by-value/header.h %T/pass-by-value-header.h
+// RUN: clang-tidy %s -checks='-*,modernize-pass-by-value' -header-filter='.*' -fix -- -std=c++11 -I %T | FileCheck %s -check-prefix=CHECK-MESSAGES -implicit-check-not="{{warning|error}}:"
+// RUN: FileCheck -input-file=%T/pass-by-value-header.h %s -check-prefix=CHECK-FIXES
+
+#include "pass-by-value-header.h"
+// CHECK-MESSAGES: :5:5: warning: pass by value and use std::move [modernize-pass-by-value]
+// CHECK-FIXES: #include <utility>
+// CHECK-FIXES: A(ThreadId tid) : threadid(std::move(tid)) {}