Convert a colour to a string

rawterm/color.cpp

@@ -24,14 +24,18 @@ namespace rawterm {
         blue = static_cast<unsigned int>(std::stoi(hex.substr(5, 2), nullptr, 16));
     }
 
-    const std::string Color::to_hex() {
+    [[nodiscard]] const std::string Color::to_hex() const noexcept {
         std::string r_str = std::format("{:02X}", red);
         std::string g_str = std::format("{:02X}", green);
         std::string b_str = std::format("{:02X}", blue);
 
         return "#" + r_str + g_str + b_str;
     }
 
+    [[nodiscard]] const std::string Color::to_str() const noexcept {
+        return std::to_string(red) + ";" + std::to_string(green) + ";" + std::to_string(blue) + "m";
+    }
+
     [[nodiscard]] std::string set_foreground(const std::string& s, const Color& color) {
         return "\x1B[38;2;" + std::to_string(color.red) + ';' + std::to_string(color.green) + ';' +
                std::to_string(color.blue) + 'm' + s + "\x1B[39m";

rawterm/color.h

@@ -13,7 +13,8 @@ namespace rawterm {
         Color(unsigned int x, unsigned int y, unsigned int z) : red(x), green(y), blue(z) {}
         Color(const std::string&);
 
-        const std::string to_hex();
+        [[nodiscard]] const std::string to_hex() const noexcept;
+        [[nodiscard]] const std::string to_str() const noexcept;
 
         friend std::ostream& operator<<(std::ostream& os, const Color& c) {
             return os << std::to_string(c.red) + ";" + std::to_string(c.green) + ";" +

tests/color_test.cpp

@@ -18,6 +18,17 @@ boost::ut::suite<"Color"> color_suite = [] {
         expect(c3.to_hex() == "#123456");
     };
 
+    "to_str"_test = [] {
+        rawterm::Color c;
+        expect(c.to_str() == "0;0;0m");
+
+        auto c2 = rawterm::Color("#123456");
+        expect(c2.to_str() == "18;52;86m");
+
+        auto c3 = rawterm::Color(18, 52, 86);
+        expect(c3.to_str() == "18;52;86m");
+    };
+
     "set_foreground"_test = [] {
         auto c = rawterm::Color(0, 255, 0);
         std::string expected = "\x1B[38;2;0;255;0mHello\x1B[39m";