Refactoring: remove implicit conversion from QCString to const char *

This commit changes the following in relation to string use
- The implicit convert from 'QCString' to 'const char *' is removed
- Strings parameters use 'const QCString &' as much as possible in favor
  over 'const char *'
- 'if (s)' where s is a QCString has been replaced by 'if(!s.isEmpty())'
- data() now always returns a valid C-string and not a 0-pointer.
- when passing a string 's' to printf and related functions 'qPrint(s)' is
  used instead of 's.data()'
- for empty string arguments 'QCString()' is used instead of '0'
- The copy() operation has been removed
- Where possible 'qstrcmp(a,b)==0' has been replaces by 'a==b' and
  'qstrcmp(a,b)<0' has been replaced by 'a<b'
- Parameters of string type that were default initialized with '= 0' are
  no initialized with '= QCString()'

1 files changed, 3 insertions, 3 deletions

diff --git a/src/layout.h b/src/layout.h
index 900d192..04fdf52 100644
--- a/src/layout.h
+++ b/src/layout.h
@@ -177,7 +177,7 @@ struct LayoutNavEntry
     void addChild(LayoutNavEntry *e) { m_children.push_back(std::unique_ptr<LayoutNavEntry>(e)); }
     void prependChild(LayoutNavEntry *e) { m_children.insert(m_children.begin(),std::unique_ptr<LayoutNavEntry>(e)); }
     const LayoutNavEntryList &children() const { return m_children; }
-    LayoutNavEntry *find(LayoutNavEntry::Kind k,const char *file=0) const;
+    LayoutNavEntry *find(LayoutNavEntry::Kind k,const QCString &file=QCString()) const;
 
   private:
     LayoutNavEntry() : m_parent(0), m_kind(None), m_visible(FALSE) {}
@@ -213,7 +213,7 @@ class LayoutDocManager
     LayoutNavEntry *rootNavEntry() const;
 
     /** Parses a user provided layout */
-    void parse(const char *fileName);
+    void parse(const QCString &fileName);
     void init();
   private:
     void addEntry(LayoutPart p,LayoutDocEntry*e);
@@ -224,7 +224,7 @@ class LayoutDocManager
     friend class LayoutParser;
 };
 
-void writeDefaultLayoutFile(const char *fileName);
+void writeDefaultLayoutFile(const QCString &fileName);
 
 #endif