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- 'if (s)' where s is a QCString has been replaced by 'if(!s.isEmpty())'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0' has been replaced by 'a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, 2 insertions, 2 deletions

diff --git a/src/condparser.h b/src/condparser.h
index 692793c..a2f806e 100644
--- a/src/condparser.h
+++ b/src/condparser.h
@@ -29,7 +29,7 @@ class CondParser
   // public functions
   public:
     CondParser() : m_e(0), m_tokenType(NOTHING) {}
-    bool parse(const char *fileName,int lineNr,const char *expr);
+    bool parse(const QCString &fileName,int lineNr,const QCString &expr);
 
     // enumerations
   private:
@@ -68,7 +68,7 @@ class CondParser
     bool parseVar();
 
     bool evalOperator(const int opId, bool lhs, bool rhs);
-    bool evalVariable(const char *varName);
+    bool evalVariable(const QCString &varName);
     int getOperatorId(const QCString &opName);
 };