Improve Stuff mentioned by clippy:

- use range.contains instead of >=  && <=
- Use better error type

CHANGELOG.md

@@ -7,6 +7,19 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+### Added
+
+
+### Changed
+ - Use specific ParseColorError instead of ()
+
+### Fixed
+
+
+## [v0.5.0]
+
+TODO!
+
 ## [v0.4.0] - 2020-04-06
 
 ### Added

src/color.rs

@@ -10,6 +10,15 @@ pub use BinaryColor::Off as White;
 #[cfg(feature = "graphics")]
 pub use BinaryColor::On as Black;
 
+/// When trying to parse u8 to one of the color types
+#[derive(Debug)]
+pub struct OutOfColorRangeParseError(u8);
+impl core::fmt::Display for OutOfColorRangeParseError {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        write!(f, "Outside of possible Color Range: {}", self.0)
+    }
+}
+
 /// Only for the Black/White-Displays
 #[derive(Clone, Copy, PartialEq, Debug)]
 pub enum Color {
@@ -73,7 +82,7 @@ impl OctColor {
     }
 
     ///Take the nibble (lower 4 bits) and convert to an OctColor if possible
-    pub fn from_nibble(nibble: u8) -> Result<OctColor, ()> {
+    pub fn from_nibble(nibble: u8) -> Result<OctColor, OutOfColorRangeParseError> {
         match nibble & 0xf {
             0x00 => Ok(OctColor::Black),
             0x01 => Ok(OctColor::White),
@@ -83,11 +92,11 @@ impl OctColor {
             0x05 => Ok(OctColor::Yellow),
             0x06 => Ok(OctColor::Orange),
             0x07 => Ok(OctColor::HiZ),
-            _ => Err(()),
+            e => Err(OutOfColorRangeParseError(e)),
         }
     }
     ///Split the nibbles of a single byte and convert both to an OctColor if possible
-    pub fn split_byte(byte: u8) -> Result<(OctColor, OctColor), ()> {
+    pub fn split_byte(byte: u8) -> Result<(OctColor, OctColor), OutOfColorRangeParseError> {
         let low = OctColor::from_nibble(byte & 0xf)?;
         let high = OctColor::from_nibble((byte >> 4) & 0xf)?;
         Ok((high, low))

src/epd2in13_v2/command.rs

@@ -221,7 +221,7 @@ impl I32Ext for i32 {
     // This is really not very nice. Until I find something better, this will be
     // a placeholder.
     fn vcom(self) -> VCOM {
-        assert!(self >= -30 && self <= -2);
+        assert!((-30..=-2).contains(&self));
         let u = match -self {
             2 => 0x08,
             3 => 0x0B,
@@ -258,20 +258,16 @@ impl I32Ext for i32 {
     }
 
     fn gate_driving_decivolt(self) -> GateDrivingVoltage {
-        assert!(self >= 100 && self <= 210 && self % 5 == 0);
+        assert!((100..=210).contains(&self) && self % 5 == 0);
         GateDrivingVoltage(((self - 100) / 5 + 0x03) as u8)
     }
 
     fn source_driving_decivolt(self) -> SourceDrivingVoltage {
-        assert!(
+        assert!((24..=88).contains(&self) || (self % 5 == 0 && (90..=180).contains(&self.abs())));
-            (self >= 24 && self <= 88)
-                || (self >= 90 && self <= 180 && self % 5 == 0)
-                || (self >= -180 && self <= -90 && self % 5 == 0)
-        );
 
-        if self >= 24 && self <= 88 {
+        if (24..=88).contains(&self) {
             SourceDrivingVoltage(((self - 24) + 0x8E) as u8)
-        } else if self >= 90 && self <= 180 {
+        } else if (90..=180).contains(&self) {
             SourceDrivingVoltage(((self - 90) / 2 + 0x23) as u8)
         } else {
             SourceDrivingVoltage((((-self - 90) / 5) * 2 + 0x1A) as u8)