Added units of voltage

CHANGELOG.md

@@ -1,3 +1,9 @@
+## Next
+- Added units of electric current
+- Added units of voltage
+- Added units of resistance
+- Fixed interpreting of `µs`
+
 ## 1.1.0 - 2020 Nov 14
 - Added units of frequency
 - Added support using foot-inch syntax with addition, like `2"+6'4"`

src/lexer.rs

@@ -336,6 +336,10 @@ pub fn lex(input: &str, allow_trailing_operators: bool, default_degree: Unit) ->
             "Ω" | "Ω" | "ohm" | "ohms" => tokens.push(Token::Unit(Ohm)),
             "kΩ" | "kΩ" | "kiloohm" | "kiloohms" => tokens.push(Token::Unit(Kiloohm)),
 
+            "mv" | "millivolt" | "millivolts" => tokens.push(Token::Unit(Millivolt)),
+            "v" | "volt" | "volts" => tokens.push(Token::Unit(Volt)),
+            "kv" | "kilovolt" | "kilovolts" => tokens.push(Token::Unit(Kilovolt)),
+
             // for pound-force per square inch
             "lbf" => tokens.push(Token::LexerKeyword(PoundForce)),
             "force" => tokens.push(Token::LexerKeyword(Force)),

src/units.rs

@@ -27,6 +27,8 @@ pub enum UnitType {
   ElectricCurrent,
   /// A unit of electric resistance, for example `Ohm`
   Resistance,
+  /// A unit of voltage, for example `Volt`
+  Voltage,
   /// A unit of pressure, for example `Bar`
   Pressure,
   /// A unit of frequency, for example `Hertz`
@@ -222,6 +224,10 @@ create_units!(
   Ohm:                          (Resistance, d128!(1000)),
   Kiloohm:                      (Resistance, d128!(1000000)),
 
+  Millivolt:                    (Voltage, d128!(1)),
+  Volt:                         (Voltage, d128!(1000)),
+  Kilovolt:                     (Voltage, d128!(1000000)),
+
   Pascal:                       (Pressure, d128!(1)),
   Kilopascal:                   (Pressure, d128!(1000)),
   Atmosphere:                   (Pressure, d128!(101325)),
@@ -684,6 +690,9 @@ mod tests {
     assert_eq!(convert_test(1000.0, Milliohm, Ohm), 1.0);
     assert_eq!(convert_test(1000.0, Ohm, Kiloohm), 1.0);
 
+    assert_eq!(convert_test(1000.0, Millivolt, Volt), 1.0);
+    assert_eq!(convert_test(1000.0, Volt, Kilovolt), 1.0);
+
     assert_eq!(convert_test(1000.0, Pascal, Kilopascal), 1.0);
     assert_eq!(convert_test(101325.0, Pascal, Atmosphere), 1.0);
     assert_eq!(convert_test(100.0, Pascal, Millibar), 1.0);