Add support for square yards

README.md

@@ -57,6 +57,7 @@ Supported units
 
 * square inch (in²)
 * square foot (ft²)
+* square yard (yd²)
 * acre (ac)
 * square mile (mi²)
 

src/conversions.rs

@@ -91,6 +91,11 @@ fn get_conversion(unit: NonMetric) -> Conversion {
 			from: inch_from * inch_from,
 			to: MetricQuantity { amount: 12.0 * inch_to * 12.0 * inch_to, unit: Metric::SquareMetre },
 		},
+		NonMetric::SquareYard => Conversion {
+			offset: 0.0,
+			from: inch_from * inch_from,
+			to: MetricQuantity { amount: 3.0 * 12.0 * inch_to * 3.0 * 12.0 * inch_to, unit: Metric::SquareMetre },
+		},
 		NonMetric::Acre => Conversion {
 			offset: 0.0,
 			from: inch_from * inch_from,
@@ -223,6 +228,7 @@ mod test {
 		let tests = [
 			Test(NonMetric::SquareInch, 0.00064516),
 			Test(NonMetric::SquareFoot, 0.09290304),
+			Test(NonMetric::SquareYard, 0.83612736),
 			Test(NonMetric::Acre, 4046.8564224),
 			Test(NonMetric::SquareMile, 2589988.110336),
 		];

src/lib.rs

@@ -84,6 +84,7 @@ fn unit_to_name(unit: NonMetric) -> &'static str {
 		// Area
 		NonMetric::SquareInch => "square inches",
 		NonMetric::SquareFoot => "square feet",
+		NonMetric::SquareYard => "square yards",
 		NonMetric::Acre => "acres",
 		NonMetric::SquareMile => "square miles",
 		// Volume
@@ -140,6 +141,7 @@ mod test {
 		// Area
 		assert_eq!(run("1 in²"), Ok("6.452 cm²".to_string()));
 		assert_eq!(run("1 ft²"), Ok("929 cm²".to_string()));
+		assert_eq!(run("1 yd²"), Ok("8 361 cm²".to_string()));
 		assert_eq!(run("1 acre"), Ok("4 047 m²".to_string()));
 		assert_eq!(run("1 mi²"), Ok("2.59 km²".to_string()));
 		// Volume

src/parse.rs

@@ -156,6 +156,19 @@ fn parse_unit(input: String) -> Result<NonMetric, ParseError> {
 		"'^2" => Ok(NonMetric::SquareFoot),
 		"sf" => Ok(NonMetric::SquareFoot),
 
+		"square yard" => Ok(NonMetric::SquareYard),
+		"square yards" => Ok(NonMetric::SquareYard),
+		"square yd" => Ok(NonMetric::SquareYard),
+		"sq yard" => Ok(NonMetric::SquareYard),
+		"sq yards" => Ok(NonMetric::SquareYard),
+		"sq yd" => Ok(NonMetric::SquareYard),
+		"yard²" => Ok(NonMetric::SquareYard),
+		"yards²" => Ok(NonMetric::SquareYard),
+		"yd²" => Ok(NonMetric::SquareYard),
+		"yard^2" => Ok(NonMetric::SquareYard),
+		"yards^2" => Ok(NonMetric::SquareYard),
+		"yd^2" => Ok(NonMetric::SquareYard),
+
 		"acre" => Ok(NonMetric::Acre),
 		"acres" => Ok(NonMetric::Acre),
 		"ac" => Ok(NonMetric::Acre),
@@ -550,6 +563,21 @@ mod test {
 			"sf",
 		]);
 
+		test_units(NonMetric::SquareYard, &[
+			"square yard",
+			"square yards",
+			"square yd",
+			"sq yard",
+			"sq yards",
+			"sq yd",
+			"yard²",
+			"yards²",
+			"yd²",
+			"yard^2",
+			"yards^2",
+			"yd^2",
+		]);
+
 		test_units(NonMetric::Acre, &[
 			"acre",
 			"acres",

src/units.rs

@@ -26,6 +26,7 @@ pub enum NonMetric {
 	// Area
 	SquareInch,
 	SquareFoot,
+	SquareYard,
 	Acre,
 	SquareMile,
 	// Volume