Utils: Improve string vector for string view usage

Some times it makes sense to have a Utils::StringViewVector instead
of a Utils::SmallStringVector because you don't want to hold the ownership.

Change-Id: I5ae39efe21aebbf82d4b3effa9e67eae6727ba8b
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/libs/utils/smallstringio.h

@@ -113,8 +113,8 @@ void PrintTo(const BasicSmallString<Size> &string, ::std::ostream *os)
     *os<< "'";
 }
 
-template <uint Size>
-QDataStream &operator<<(QDataStream &out, const BasicSmallStringVector<Size>  &stringVector)
+template <typename String>
+QDataStream &operator<<(QDataStream &out, const BasicSmallStringVector<String>  &stringVector)
 {
     out << quint64(stringVector.size());
 
@@ -124,8 +124,8 @@ QDataStream &operator<<(QDataStream &out, const BasicSmallStringVector<Size>  &s
     return out;
 }
 
-template <uint Size>
-QDataStream &operator>>(QDataStream &in, BasicSmallStringVector<Size>  &stringVector)
+template <typename String>
+QDataStream &operator>>(QDataStream &in, BasicSmallStringVector<String>  &stringVector)
 {
     stringVector.clear();
 
@@ -136,7 +136,7 @@ QDataStream &operator>>(QDataStream &in, BasicSmallStringVector<Size>  &stringVe
     stringVector.reserve(size);
 
     for (quint64 i = 0; i < size; ++i) {
-        BasicSmallString<Size> string;
+        String string;
 
         in >> string;
 
@@ -146,18 +146,18 @@ QDataStream &operator>>(QDataStream &in, BasicSmallStringVector<Size>  &stringVe
     return in;
 }
 
-template <uint Size>
-QDebug operator<<(QDebug debug, const BasicSmallStringVector<Size> &stringVector)
+template <typename String>
+QDebug operator<<(QDebug debug, const BasicSmallStringVector<String> &stringVector)
 {
-    debug << "StringVector(" << stringVector.join(BasicSmallString<Size>(", ")).constData() << ")";
+    debug << "StringVector(" << stringVector.join(", ").constData() << ")";
 
     return debug;
 }
 
-template <uint Size>
-void PrintTo(const BasicSmallStringVector<Size> &textVector, ::std::ostream* os)
+template <typename String>
+void PrintTo(const BasicSmallStringVector<String> &textVector, ::std::ostream* os)
 {
-    *os << "[" << textVector.join(BasicSmallString<Size>(", ")).constData() << "]";
+    *os << "[" << textVector.join(", ").constData() << "]";
 }
 
 } // namespace Utils

src/libs/utils/smallstringvector.h

@@ -35,25 +35,27 @@
 
 namespace Utils {
 
-template<uint SmallStringSize>
-class BasicSmallStringVector : public std::vector<BasicSmallString<SmallStringSize>>
+template<typename String>
+class BasicSmallStringVector : public std::vector<String>
 {
-    using SmallString = BasicSmallString<SmallStringSize>;
-    using Base = std::vector<SmallString>;
+    using Base = std::vector<String>;
+
 public:
     BasicSmallStringVector() = default;
 
+    using Base::Base;
+
     explicit BasicSmallStringVector(const Base &stringVector)
         : Base(stringVector.begin(), stringVector.end())
     {
     }
 
-    BasicSmallStringVector(std::initializer_list<SmallString> list)
+    BasicSmallStringVector(std::initializer_list<String> list)
     {
         Base::reserve(list.size());
 
         for (auto &&entry : list)
-            Base::push_back(entry.clone());
+            Base::push_back(std::move(entry));
     }
 
     explicit BasicSmallStringVector(const QStringList &stringList)
@@ -79,7 +81,7 @@ public:
     BasicSmallStringVector &operator=(BasicSmallStringVector &&)
         noexcept(std::is_nothrow_move_assignable<Base>::value) = default;
 
-    SmallString join(SmallString &&separator) const
+    SmallString join(SmallStringView separator) const
     {
         SmallString joinedString;
 
@@ -110,7 +112,7 @@ public:
         return hasEntry;
     }
 
-    void append(SmallString &&string)
+    void append(String &&string)
     {
         push_back(std::move(string));
     }
@@ -153,6 +155,9 @@ private:
     }
 };
 
-using SmallStringVector = BasicSmallStringVector<31>;
-using PathStringVector = BasicSmallStringVector<190>;
+
+
+using SmallStringVector = BasicSmallStringVector<BasicSmallString<31>>;
+using PathStringVector = BasicSmallStringVector<BasicSmallString<190>>;
+using StringViewVector = BasicSmallStringVector<SmallStringView>;
 } // namespace Utils;