Massively simplify WTF's StringConcatenate

third_party/WebKit/Source/wtf/text/StringOperators.h

-/*
- * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
- * Copyright (C) Research In Motion Limited 2011. All rights reserved.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
- */
-
-#ifndef StringOperators_h
-#define StringOperators_h
-
-#include "wtf/Allocator.h"
-#include "wtf/text/StringConcatenate.h"
-
-namespace WTF {
-
-template<typename StringType1, typename StringType2>
-class StringAppend final {
-    STACK_ALLOCATED();
-public:
-    StringAppend(StringType1 string1, StringType2 string2);
-
-    operator String() const;
-
-    operator AtomicString() const;
-
-    bool is8Bit();
-
-    void writeTo(LChar* destination);
-
-    void writeTo(UChar* destination);
-
-    unsigned length();
-
-private:
-    StringType1 m_string1;
-    StringType2 m_string2;
-};
-
-template<typename StringType1, typename StringType2>
-StringAppend<StringType1, StringType2>::StringAppend(StringType1 string1, StringType2 string2)
-    : m_string1(string1)
-    , m_string2(string2)
-{
-}
-
-template<typename StringType1, typename StringType2>
-StringAppend<StringType1, StringType2>::operator String() const
-{
-    return String(makeString(m_string1, m_string2));
-}
-
-template<typename StringType1, typename StringType2>
-StringAppend<StringType1, StringType2>::operator AtomicString() const
-{
-    return AtomicString(makeString(m_string1, m_string2));
-}
-
-template<typename StringType1, typename StringType2>
-bool StringAppend<StringType1, StringType2>::is8Bit()
-{
-    StringTypeAdapter<StringType1> adapter1(m_string1);
-    StringTypeAdapter<StringType2> adapter2(m_string2);
-    return adapter1.is8Bit() && adapter2.is8Bit();
-}
-
-template<typename StringType1, typename StringType2>
-void StringAppend<StringType1, StringType2>::writeTo(LChar* destination)
-{
-    ASSERT(is8Bit());
-    StringTypeAdapter<StringType1> adapter1(m_string1);
-    StringTypeAdapter<StringType2> adapter2(m_string2);
-    adapter1.writeTo(destination);
-    adapter2.writeTo(destination + adapter1.length());
-}
-
-template<typename StringType1, typename StringType2>
-void StringAppend<StringType1, StringType2>::writeTo(UChar* destination)
-{
-    StringTypeAdapter<StringType1> adapter1(m_string1);
-    StringTypeAdapter<StringType2> adapter2(m_string2);
-    adapter1.writeTo(destination);
-    adapter2.writeTo(destination + adapter1.length());
-}
-
-template<typename StringType1, typename StringType2>
-unsigned StringAppend<StringType1, StringType2>::length()
-{
-    StringTypeAdapter<StringType1> adapter1(m_string1);
-    StringTypeAdapter<StringType2> adapter2(m_string2);
-    return adapter1.length() + adapter2.length();
-}
-
-template<typename StringType1, typename StringType2>
-class StringTypeAdapter<StringAppend<StringType1, StringType2>> {
-    STACK_ALLOCATED();
-public:
-    StringTypeAdapter<StringAppend<StringType1, StringType2>>(StringAppend<StringType1, StringType2>& buffer)
-        : m_buffer(buffer)
-    {
-    }
-
-    unsigned length() { return m_buffer.length(); }
-
-    bool is8Bit() { return m_buffer.is8Bit(); }
-
-    void writeTo(LChar* destination) { m_buffer.writeTo(destination); }
-    void writeTo(UChar* destination) { m_buffer.writeTo(destination); }
-
-private:
-    StringAppend<StringType1, StringType2>& m_buffer;
-};
-
-inline StringAppend<const char*, String> operator+(const char* string1, const String& string2)
-{
-    return StringAppend<const char*, String>(string1, string2);
-}
-
-inline StringAppend<const char*, AtomicString> operator+(const char* string1, const AtomicString& string2)
-{
-    return StringAppend<const char*, AtomicString>(string1, string2);
-}
-
-template<typename U, typename V>
-inline StringAppend<const char*, StringAppend<U, V>> operator+(const char* string1, const StringAppend<U, V>& string2)
-{
-    return StringAppend<const char*, StringAppend<U, V>>(string1, string2);
-}
-
-inline StringAppend<const UChar*, String> operator+(const UChar* string1, const String& string2)
-{
-    return StringAppend<const UChar*, String>(string1, string2);
-}
-
-inline StringAppend<const UChar*, AtomicString> operator+(const UChar* string1, const AtomicString& string2)
-{
-    return StringAppend<const UChar*, AtomicString>(string1, string2);
-}
-
-template<typename U, typename V>
-inline StringAppend<const UChar*, StringAppend<U, V>> operator+(const UChar* string1, const StringAppend<U, V>& string2)
-{
-    return StringAppend<const UChar*, StringAppend<U, V>>(string1, string2);
-}
-
-template<typename T>
-StringAppend<String, T> operator+(const String& string1, T string2)
-{
-    return StringAppend<String, T>(string1, string2);
-}
-
-template<typename U, typename V, typename W>
-StringAppend<StringAppend<U, V>, W> operator+(const StringAppend<U, V>& string1, W string2)
-{
-    return StringAppend<StringAppend<U, V>, W>(string1, string2);
-}
-
-} // namespace WTF
-
-#endif // StringOperators_h