constexpr stream manipulators to allow "macroing"

c_os/devices/CGA_Stream.h

@@ -15,25 +15,39 @@
 #ifndef __CGA_Stream_include__
 #define __CGA_Stream_include__
 
-// #include "devices/BufferedCGA.h"
 #include "devices/BufferedCGA.h"
 #include "lib/OutStream.h"
 
-// NOTE: I added this
+// NOTE: I added these classes to allow for easier stream-like color changing
 class fgc {
 public:
-    fgc() : fg(CGA::LIGHT_GREY) {}
-    fgc(CGA::color fg) : fg(fg) {}
-    CGA::color fg;
-};
-class bgc {
-public:
-    bgc() : bg(CGA::BLACK) {}
-    bgc(CGA::color bg) : bg(bg) {}
-    CGA::color bg;
+    constexpr fgc(const CGA::color fg) : fg(fg) {}
+    const CGA::color fg;
 };
 
-// NOTE: I added this (changed this) to use BufferedCGA
+// NOTE: I could have used a struct to remove the public, but I like to use
+//       structs exclusively for C like memory "descriptions", although they're
+//       techinally the same to classes
+class bgc {
+public:
+    constexpr bgc(const CGA::color bg) : bg(bg) {} // Make this into a literal type to allow macro-like usage
+    const CGA::color bg;
+};
+
+// NOTE: I didn't want to use macro definitions since I don't like them,
+//       makes it easier to change colors
+constexpr bgc white_b = bgc(CGA::WHITE);
+constexpr bgc black_b = bgc(CGA::BLACK);
+constexpr bgc green_b = bgc(CGA::GREEN);
+constexpr bgc red_b = bgc(CGA::RED);
+constexpr bgc lgrey_b = bgc(CGA::LIGHT_GREY);
+constexpr fgc white_f = fgc(CGA::WHITE);
+constexpr fgc black_f = fgc(CGA::BLACK);
+constexpr fgc green_f = fgc(CGA::GREEN);
+constexpr fgc red_f = fgc(CGA::RED);
+constexpr fgc lgrey_f = fgc(CGA::LIGHT_GREY);
+
+// NOTE: I changed this to use BufferedCGA so I can view offscreen text
 class CGA_Stream : public OutStream, public BufferedCGA {
 private:
     CGA_Stream(CGA_Stream& copy) = delete;  // Verhindere Kopieren
@@ -50,7 +64,7 @@ public:
     // Methode zur Ausgabe des Pufferinhalts der Basisklasse StringBuffer.
     void flush() override;
 
-    // NOTE: I added this
+    // Change stream color
     template<typename T>
     // requires std::derived_from<T, CGA_Stream>
     friend T& operator<<(T& os, const fgc& fg) {
@@ -58,7 +72,6 @@ public:
         os.color_fg = fg.fg;
         return os;
     }
-
     template<typename T>
     // requires std::derived_from<T, CGA_Stream>
     friend T& operator<<(T& os, const bgc& bg) {

c_os/lib/OutStream.h

@@ -28,22 +28,20 @@
 // NOTE: I added this
 class fillw {
 public:
-    fillw() : w(0) {}
-    fillw(unsigned char w) : w(w) {}
-    unsigned char w;
+    constexpr fillw(const unsigned char w) : w(w) {}
+    const unsigned char w;
 };
 class fillc {
 public:
-    fillc() : c(' ') {}
-    fillc(char c) : c(c) {}
-    char c;
+    constexpr fillc(const char c) : c(c) {}
+    const char c;
 };
 
 class OutStream : public StringBuffer {
 private:
     OutStream(const OutStream& copy) = delete;  // Verhindere Kopieren
 
-    // NOTE: I added this
+    // Some stream formatting
     unsigned char fill_used;  // indicates how many characters are already used by the text internally
     void fill_use_char();     // recognizes that one char from the print width has been used up
     void fill_finalize();     // does the filling after text has been written to buffer
@@ -51,7 +49,7 @@ private:
 public:
     int base;  // Basis des Zahlensystems: z.B. 2, 8, 10 oder 16
 
-    // NOTE: I added this
+    // // Some stream formatting
     unsigned char fill_width;
     char fill_char;  // fill character for fixed width
 
@@ -60,7 +58,6 @@ public:
     // Methode zur Ausgabe des Pufferinhalts der Basisklasse StringBuffer.
     void flush() override;
 
-    // NOTE: I added this, override put for fixed width
     void put(char c) override;
 
     // OPERATOR << : Umwandlung des angegebenen Datentypes in eine
@@ -194,7 +191,7 @@ public:
         return f(os);
     }
 
-    // NOTE: I added this
+    // For stream formatting
     template<typename T>
     // requires std::derived_from<T, OutStream>
     friend T& operator<<(T& os, const fillw& w) {
@@ -202,7 +199,6 @@ public:
         os.fill_width = w.w;
         return os;
     }
-
     template<typename T>
     // requires std::derived_from<T, OutStream>
     friend T& operator<<(T& os, const fillc& c) {