FileUtils: Replace FileNameList with an alias

The functionality in that class is covered by initializers and
Utils::unique, so there is no need to keep a custom class.

This way FileNameList plays way nicer with utils/algorithm.h.

Change-Id: I8eeae6aca0558ecd998920c4fdfc5ea56bf75501
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

src/plugins/cpptools/cppfindreferences.cpp

@@ -40,6 +40,7 @@
 #include <coreplugin/progressmanager/progressmanager.h>
 #include <texteditor/basefilefind.h>
 
+#include <utils/algorithm.h>
 #include <utils/qtcassert.h>
 #include <utils/runextensions.h>
 #include <utils/textfileformat.h>
@@ -280,7 +281,7 @@ static void find_helper(QFutureInterface<Usage> &future,
 
     const Utils::FileName sourceFile = Utils::FileName::fromUtf8(symbol->fileName(),
                                                                  symbol->fileNameLength());
-    Utils::FileNameList files(sourceFile);
+    Utils::FileNameList files {sourceFile};
 
     if (symbol->isClass()
         || symbol->isForwardClassDeclaration()
@@ -300,7 +301,7 @@ static void find_helper(QFutureInterface<Usage> &future,
     } else {
         files += snapshot.filesDependingOn(sourceFile);
     }
-    files.removeDuplicates();
+    files = Utils::filteredUnique(files);
 
     future.setProgressRange(0, files.size());
 
@@ -617,9 +618,8 @@ static void findMacroUses_helper(QFutureInterface<Usage> &future,
                                  const Macro macro)
 {
     const Utils::FileName sourceFile = Utils::FileName::fromString(macro.fileName());
-    Utils::FileNameList files(sourceFile);
-    files += snapshot.filesDependingOn(sourceFile);
-    files.removeDuplicates();
+    Utils::FileNameList files {sourceFile};
+    files = Utils::filteredUnique(files + snapshot.filesDependingOn(sourceFile));
 
     future.setProgressRange(0, files.size());
     FindMacroUsesInFile process(workingCopy, snapshot, macro, &future);

src/plugins/cpptools/cpptoolsreuse.cpp

@@ -39,6 +39,7 @@
 
 #include <cplusplus/Overview.h>
 #include <cplusplus/LookupContext.h>
+#include <utils/algorithm.h>
 #include <utils/qtcassert.h>
 
 #include <QDebug>
@@ -290,11 +291,9 @@ bool skipFileDueToSizeLimit(const QFileInfo &fileInfo, int limitInMB)
 
 Utils::FileNameList modifiedFiles()
 {
-    Utils::FileNameList files;
-    foreach (Core::IDocument *doc, Core::DocumentManager::modifiedDocuments())
-        files.append(doc->filePath());
-    files.removeDuplicates();
-    return files;
+    Utils::FileNameList files = Utils::transform(Core::DocumentManager::modifiedDocuments(),
+                                                 &Core::IDocument::filePath);
+    return Utils::filteredUnique(files);
 }
 
 } // CppTools

src/plugins/cpptools/cpptoolsreuse.h

@@ -37,6 +37,8 @@
 
 #include <cplusplus/CppDocument.h>
 
+#include <utils/fileutils.h>
+
 QT_BEGIN_NAMESPACE
 class QChar;
 class QFileInfo;
@@ -44,10 +46,6 @@ class QStringRef;
 class QTextCursor;
 QT_END_NAMESPACE
 
-namespace Utils {
-class FileNameList;
-} // namespace Utils
-
 namespace CPlusPlus {
 class Macro;
 class Symbol;