This'll make *everything* rebuild. String formatters now support the end()

call, which will force substitution and return a string.  They now also support
ending actions, which let us do great stuff like printing stuff out after
formatting finished...and other stuff.

5 files changed, 88 insertions, 22 deletions

diff --git a/src/stable/sio.cpp b/src/stable/sio.cpp
index 02ba631..e7f7565 100644
--- a/src/stable/sio.cpp
+++ b/src/stable/sio.cpp
@@ -10,25 +10,45 @@
 Bu::StdStream Bu::sioRaw;
 Bu::Formatter Bu::sio( Bu::sioRaw );
 
-Bu::size Bu::print( Bu::Stream &s, const Bu::String &str )
+class PrintEndAction : public Bu::String::FormatProxyEndAction
 {
-        return s.write( str.getStr(), str.getSize() );
+public:
+        PrintEndAction( Bu::Stream &s, bool bEndLn ) :
+                s( s ),
+                bEndLn( bEndLn )
+        {
+        }
+
+        virtual void operator()( const Bu::String &sFinal )
+        {
+                s.write( sFinal.getStr(), sFinal.getSize() );
+                if( bEndLn )
+                {
+                        s.write("\n", 1);
+                        s.flush();
+                }
+        }
+
+        Bu::Stream &s;
+        bool bEndLn;
+};
+
+Bu::String::FormatProxy Bu::print( Bu::Stream &s, const Bu::String &str )
+{
+        return str.format( new PrintEndAction( s, false ) );
 }
 
-Bu::size Bu::print( const Bu::String &str )
+Bu::String::FormatProxy Bu::print( const Bu::String &str )
 {
         return print( sioRaw, str );
 }
 
-Bu::size Bu::println( Bu::Stream &s, const Bu::String &str )
+Bu::String::FormatProxy Bu::println( Bu::Stream &s, const Bu::String &str )
 {
-        Bu::size sRet = s.write( str.getStr(), str.getSize() );
-        sRet += s.write("\n", 1 );
-        s.flush();
-        return sRet;
+        return str.format( new PrintEndAction( s, true ) );
 }
 
-Bu::size Bu::println( const Bu::String &str )
+Bu::String::FormatProxy Bu::println( const Bu::String &str )
 {
         return println( sioRaw, str );
 }
diff --git a/src/stable/sio.h b/src/stable/sio.h
index cc7b098..d9761b2 100644
--- a/src/stable/sio.h
+++ b/src/stable/sio.h
@@ -16,11 +16,11 @@ namespace Bu
         extern Bu::StdStream sioRaw;
         extern Bu::Formatter sio;
 
-        Bu::size print( Bu::Stream &s, const Bu::String &str );
-        Bu::size print( const Bu::String &str );
+        Bu::String::FormatProxy print( Bu::Stream &s, const Bu::String &str );
+        Bu::String::FormatProxy print( const Bu::String &str );
 
-        Bu::size println( Bu::Stream &s, const Bu::String &str );
-        Bu::size println( const Bu::String &str );
+        Bu::String::FormatProxy println( Bu::Stream &s, const Bu::String &str );
+        Bu::String::FormatProxy println( const Bu::String &str );
 };
 
 #endif
diff --git a/src/stable/string.cpp b/src/stable/string.cpp
index 4cef6b1..d1f76aa 100644
--- a/src/stable/string.cpp
+++ b/src/stable/string.cpp
@@ -1228,16 +1228,23 @@ bool Bu::String::isFlat() const
 // Sub-class Bu::String::FormatProxy
 //
 
-Bu::String::FormatProxy::FormatProxy( const String &rFmt ) :
-        rFmt( rFmt )
+Bu::String::FormatProxy::FormatProxy( const String &rFmt,
+                String::FormatProxyEndAction *pAct ) :
+        rFmt( rFmt ),
+        pAct( pAct ),
+        bOpen( true )
 {
 }
 
 Bu::String::FormatProxy::~FormatProxy()
 {
+        if( pAct && bOpen )
+                end();
+
+        delete pAct;
 }
 
-Bu::String::FormatProxy::operator Bu::String() const
+Bu::String Bu::String::FormatProxy::end() const
 {
         int iCount = lArgs.getSize();
         ArgList::const_iterator *aArg =
@@ -1287,8 +1294,12 @@ Bu::String::FormatProxy::operator Bu::String() const
                 }
                 s++;
         }
-
+        
+        bOpen = false;
         delete[] aArg;
+
+        if( pAct )
+                (*pAct)( mbOut.getString() );
         return mbOut.getString();
 }
 
diff --git a/src/stable/string.h b/src/stable/string.h
index 82b903b..c92a704 100644
--- a/src/stable/string.h
+++ b/src/stable/string.h
@@ -946,12 +946,21 @@ namespace Bu
                 void flatten() const;
                 bool isFlat() const;
 
+        public:
+                class FormatProxyEndAction
+                {
+                public:
+                        virtual void operator()( const Bu::String &sFinal )=0;
+                };
+
                 class FormatProxy
                 {
+                friend class Bu::String;
+                private:
+                        FormatProxy( const String &rFmt, FormatProxyEndAction *pAct=NULL );
+
                 public:
-                        FormatProxy( const String &rFmt );
                         virtual ~FormatProxy();
-
                         template<typename T>
                         FormatProxy &arg( const T &x )
                         {
@@ -968,7 +977,8 @@ namespace Bu
                                 return *this;
                         }
 
-                        operator String() const;
+                        String end() const;
+                        operator String() const { return end(); }
 
                 private:
                         const String &rFmt;
@@ -993,20 +1003,32 @@ namespace Bu
                         };
                         typedef Bu::List<Arg> ArgList;
                         ArgList lArgs;
+                        FormatProxyEndAction *pAct;
+                        mutable bool bOpen;
                 };
 
         public:
                 template<typename ArgType>
-                FormatProxy arg( const ArgType &x )
+                FormatProxy arg( const ArgType &x ) const
                 {
                         return FormatProxy( *this ).arg( x );
                 }
 
                 template<typename ArgType>
-                FormatProxy arg( const ArgType &x, const Bu::Fmt &f )
+                FormatProxy arg( const ArgType &x, const Bu::Fmt &f ) const
                 {
                         return FormatProxy( *this ).arg( x, f );
                 }
+                
+                FormatProxy format() const
+                {
+                        return FormatProxy( *this );
+                }
+
+                FormatProxy format( FormatProxyEndAction *pEndAction ) const
+                {
+                        return FormatProxy( *this, pEndAction );
+                }
         };
         
         template<class T> String operator+( const T *pLeft, const String &rRight )
diff --git a/src/tests/print.cpp b/src/tests/print.cpp
new file mode 100644
index 0000000..7d55554
--- /dev/null
+++ b/src/tests/print.cpp
@@ -0,0 +1,13 @@
+#include <bu/sio.h>
+
+int main()
+{
+        Bu::print("hello there %1!\n").arg("Bob");
+
+        Bu::println("This is %1 crazy, like %2 times over!").
+                arg("totally").arg( 47.2 );
+        Bu::println("This is unsubstituted?");
+
+        return 0;
+}
+