Clang: Add BuildDependencyCollector

IncludeCollector is renamed to BuildDependencyCollector. It is now
returning a BuildDependency instead of individual getter. The test coverage
is improved too.

Task-number: QTCREATORBUG-21379
Change-Id: Ifc2d1c40c85772cf498c21968de526f4408b6023
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/tools/clangrefactoringbackend/source/clangtool.cpp

@@ -135,6 +135,8 @@ clang::tooling::ClangTool ClangTool::createTool() const
             tool.mapVirtualFile(toStringRef(unsavedFileContent.filePath),
                                 toStringRef(unsavedFileContent.content));
 
+    tool.mapVirtualFile("/dummyFile", "#pragma once");
+
     return tool;
 }
 

src/tools/clangrefactoringbackend/source/filestatus.h

@@ -54,6 +54,12 @@ public:
             && first.lastModified == second.lastModified;
     }
 
+    friend
+    bool operator<(const FileStatus &first, const FileStatus &second)
+    {
+        return first.filePathId < second.filePathId;
+    }
+
 public:
     FilePathId filePathId;
     off_t size;

src/tools/clangrefactoringbackend/source/sourcedependency.h

@@ -34,17 +34,26 @@ namespace ClangBackEnd {
 class SourceDependency
 {
 public:
-    SourceDependency(FilePathId filePathId,
-                    FilePathId dependencyFilePathId)
-        : filePathId(filePathId),
-          dependencyFilePathId(dependencyFilePathId)
+    SourceDependency(FilePathId filePathId, FilePathId dependencyFilePathId)
+        : filePathId(filePathId)
+        , dependencyFilePathId(dependencyFilePathId)
     {}
 
-    friend
-    bool operator==(SourceDependency first, SourceDependency second)
+    friend bool operator==(SourceDependency first, SourceDependency second)
     {
         return first.filePathId == second.filePathId
-            && first.dependencyFilePathId == second.dependencyFilePathId;
+               && first.dependencyFilePathId == second.dependencyFilePathId;
+    }
+
+    friend bool operator!=(SourceDependency first, SourceDependency second)
+    {
+        return !(first == second);
+    }
+
+    friend bool operator<(SourceDependency first, SourceDependency second)
+    {
+        return std::tie(first.filePathId, first.dependencyFilePathId)
+               < std::tie(second.filePathId, second.dependencyFilePathId);
     }
 
 public:
@@ -53,4 +62,4 @@ public:
 };
 
 using SourceDependencies = std::vector<SourceDependency>;
-}
+} // namespace ClangBackEnd

src/tools/clangrefactoringbackend/source/symbolsvisitorbase.h

@@ -145,7 +145,7 @@ public:
         return SymbolIndex(reinterpret_cast<std::uintptr_t>(pointer));
     }
 
-    void setSourceManager(const clang::SourceManager *sourceManager)
+    void setSourceManager(clang::SourceManager *sourceManager)
     {
         m_sourceManager = sourceManager;
     }