Use upcomping features

builder_error2.v

@@ -4,8 +4,8 @@ import color
 
 fn main() {
 	p := color.PaintBrush{
-		fg: color.rgb(0, 0, 0)!,
-		bg: color.hex(0xffffff)!,
+		fg: color.rgb(0, 0, 0)!
+		bg: color.hex(0xffffff)!
 		styles: [color.bold, color.underline, color.italic]
 	}
 

color/color.v

@@ -1,21 +0,0 @@
-module color
-
-type Color = BasicColor | NoColor | TrueColor
-
-const no_color = NoColor{}
-
-struct NoColor {}
-
-fn (c Color) apply(msg string) string {
-	return match c {
-		NoColor { msg }
-		else { c.apply(msg) }
-	}
-}
-
-fn (c Color) apply_bg(msg string) string {
-	return match c {
-		NoColor { msg }
-		else { c.apply_bg(msg) }
-	}
-}

color/paintbrush.v

@@ -1,14 +1,15 @@
 module color
 
 import term
-import datatypes
+
+type Color = BasicColor | TrueColor
 
 const can_show_color = term.can_show_color_on_stdout()
 
 pub struct PaintBrush {
 pub:
-	fg     Color = no_color
-	bg     Color = no_color
+	fg     ?Color
+	bg     ?Color
 	styles []Style
 }
 
@@ -17,7 +18,15 @@ pub fn (p &PaintBrush) apply(msg string) string {
 		return msg
 	}
 
-	mut result := p.bg.apply(p.fg.apply(msg))
+	mut result := msg
+
+	// IS NOT IMPLEMENTED YET !!!
+	if fg := p.fg {
+		result = fg.apply(result)
+	}
+	if bg := p.bg {
+		result = bg.apply(result)
+	}
 
 	for style in p.styles {
 		result = style.apply(result)

color/true_color.v

@@ -2,14 +2,6 @@ module color
 
 import term
 
-[noinit]
-struct TrueColor {
-pub:
-	r int [required]
-	g int [required]
-	b int [required]
-}
-
 pub fn rgb(r int, g int, b int) !TrueColor {
 	if r < 0 || r > 255 || g < 0 || g > 255 || b < 0 || b > 255 {
 		return error('Red, green and blue must each be between 0 and 255')
@@ -25,6 +17,14 @@ pub fn hex(hex int) !TrueColor {
 	return rgb(hex >> 16, hex >> 8 & 0xFF, hex & 0xFF)!
 }
 
+[noinit]
+struct TrueColor {
+pub:
+	r int
+	g int
+	b int
+}
+
 pub fn (c TrueColor) apply(msg string) string {
 	return term.rgb(c.r, c.g, c.b, msg)
 }