CppHighlighter: highlight all functions/methods.

- Highlight all function/methods (not just virtual methods).
- Highlight as a function even if number of arguments does not match. In
  that case, add a diagnostic message to indicate there are too many/too
  few arguments.
- Fix highlighting of parameters in function declarations.
  These used to be handled indiferently, and they could be mistaken for
  type or field references.
- Properly highlight template method calls.

Change-Id: I6e61c9ee47763db95c62314f9cc1c4d398df38b3
Reviewed-by: Leandro Melo <leandro.melo@nokia.com>

src/plugins/cppeditor/cppeditor.cpp

@@ -1047,6 +1047,11 @@ void CPPEditorWidget::finishHighlightSymbolUsages()
 
     TextEditor::SemanticHighlighter::clearExtraAdditionalFormatsUntilEnd(
                 highlighter, m_highlighter);
+
+    if (m_modelManager)
+        m_modelManager->setExtraDiagnostics(m_lastSemanticInfo.doc->fileName(),
+                                            CPlusPlus::CppModelManagerInterface::CppSemanticsDiagnostic,
+                                            m_lastSemanticInfo.doc->diagnosticMessages());
 }
 
 
@@ -1744,6 +1749,8 @@ void CPPEditorWidget::setFontSettings(const TextEditor::FontSettings &fs)
             fs.toTextCharFormat(TextEditor::C_LABEL);
     m_semanticHighlightFormatMap[SemanticInfo::MacroUse] =
             fs.toTextCharFormat(TextEditor::C_PREPROCESSOR);
+    m_semanticHighlightFormatMap[SemanticInfo::FunctionUse] =
+            fs.toTextCharFormat(TextEditor::C_FUNCTION);
     m_keywordFormat = fs.toTextCharFormat(TextEditor::C_KEYWORD);
 
     // only set the background, we do not want to modify foreground properties set by the syntax highlighter or the link