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5 changed files with 168 additions and 1 deletions
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@ -64,6 +64,27 @@ fn get_conversion(unit: NonMetric) -> Conversion {
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from: 9.0,
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to: MetricQuantity { amount: 5.0, unit: Metric::Celcius },
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},
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// Area
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NonMetric::SquareInch => Conversion {
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offset: 0.0,
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from: inch_from * inch_from,
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to: MetricQuantity { amount: inch_to * inch_to, unit: Metric::SquareMetre },
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},
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NonMetric::SquareFoot => Conversion {
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offset: 0.0,
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from: inch_from * inch_from,
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to: MetricQuantity { amount: 12.0 * inch_to * 12.0 * inch_to, unit: Metric::SquareMetre },
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},
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NonMetric::Acre => Conversion {
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offset: 0.0,
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from: inch_from * inch_from,
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to: MetricQuantity { amount: 43_560.0 * 12.0 * inch_to * 12.0 * inch_to, unit: Metric::SquareMetre },
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},
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NonMetric::SquareMile => Conversion {
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offset: 0.0,
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from: inch_from * inch_from,
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to: MetricQuantity { amount: 1760.0 * 3.0 * 12.0 * inch_to * 1760.0 * 3.0 * 12.0 * inch_to, unit: Metric::SquareMetre },
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},
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}
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}
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@ -112,6 +133,17 @@ mod test {
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});
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}
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#[test]
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fn area() {
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let tests = [
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Test(NonMetric::SquareInch, 0.00064516),
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Test(NonMetric::SquareFoot, 0.09290304),
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Test(NonMetric::Acre, 4046.8564224),
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Test(NonMetric::SquareMile, 2589988.110336),
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];
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run_tests(&tests, Metric::SquareMetre);
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}
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fn run_tests(tests: &[Test], unit: Metric) {
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for test in tests {
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let from = NonMetricQuantity {
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@ -84,6 +84,17 @@ fn prefixed_unit(quantity: MetricQuantity) -> PrefixedUnit {
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}
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}
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Metric::Celcius => PrefixedUnit(1.0, "°C"),
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Metric::SquareMetre => {
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if absolute >= 1000.0 * 1000.0 {
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return PrefixedUnit(1000.0 * 1000.0, "km²");
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} else if absolute >= 1.0 {
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return PrefixedUnit(1.0, "m²");
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} else if absolute >= 0.01 * 0.01 {
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return PrefixedUnit(0.01 * 0.01, "cm²");
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} else {
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return PrefixedUnit(0.001 * 0.001, "mm²");
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}
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}
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}
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}
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@ -154,7 +165,7 @@ mod test {
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}
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#[test]
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fn units() {
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fn metres() {
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assert_eq!(PrefixedUnit(0.001, "mm"), prefixed_unit(MetricQuantity {
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amount: 0.0001,
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unit: Metric::Metre,
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@ -208,7 +219,10 @@ mod test {
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amount: -1000.0,
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unit: Metric::Metre,
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}));
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}
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#[test]
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fn grams() {
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assert_eq!(PrefixedUnit(1.0, "g"), prefixed_unit(MetricQuantity {
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amount: 0.1,
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unit: Metric::Gram,
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@ -242,7 +256,10 @@ mod test {
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amount: -1000.0,
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unit: Metric::Gram,
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}));
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}
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#[test]
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fn celcius() {
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assert_eq!(PrefixedUnit(1.0, "°C"), prefixed_unit(MetricQuantity {
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amount: 0.0001,
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unit: Metric::Celcius,
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@ -256,4 +273,72 @@ mod test {
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unit: Metric::Celcius,
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}));
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}
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#[test]
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fn square_metres() {
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assert_eq!(PrefixedUnit(0.000_001, "mm²"), prefixed_unit(MetricQuantity {
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amount: 0.000_000_1,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(0.000_001, "mm²"), prefixed_unit(MetricQuantity {
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amount: 0.000_001,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(0.000_001, "mm²"), prefixed_unit(MetricQuantity {
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amount: 0.000_01,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(0.000_1, "cm²"), prefixed_unit(MetricQuantity {
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amount: 0.000_1,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(0.000_1, "cm²"), prefixed_unit(MetricQuantity {
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amount: 0.001,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(0.000_1, "cm²"), prefixed_unit(MetricQuantity {
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amount: 0.01,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(0.000_1, "cm²"), prefixed_unit(MetricQuantity {
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amount: 0.01,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(0.000_1, "cm²"), prefixed_unit(MetricQuantity {
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amount: 0.1,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(1.0, "m²"), prefixed_unit(MetricQuantity {
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amount: 1.0,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(1.0, "m²"), prefixed_unit(MetricQuantity {
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amount: 10.0,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(1.0, "m²"), prefixed_unit(MetricQuantity {
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amount: 100.0,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(1.0, "m²"), prefixed_unit(MetricQuantity {
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amount: 1_000.0,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(1.0, "m²"), prefixed_unit(MetricQuantity {
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amount: 10_000.0,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(1.0, "m²"), prefixed_unit(MetricQuantity {
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amount: 100_000.0,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(1_000_000.0, "km²"), prefixed_unit(MetricQuantity {
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amount: 1_000_000.0,
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unit: Metric::SquareMetre,
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}));
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assert_eq!(PrefixedUnit(1_000_000.0, "km²"), prefixed_unit(MetricQuantity {
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amount: 10_000_000.0,
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unit: Metric::SquareMetre,
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}));
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}
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}
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10
src/lib.rs
10
src/lib.rs
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@ -72,6 +72,11 @@ fn unit_to_name(unit: NonMetric) -> &'static str {
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NonMetric::Stone => "stones",
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// Temperature
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NonMetric::Fahrenheit => "degrees Fahrenheit",
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// Area
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NonMetric::SquareInch => "square inches",
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NonMetric::SquareFoot => "square feet",
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NonMetric::Acre => "acres",
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NonMetric::SquareMile => "square miles",
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}
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}
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@ -104,5 +109,10 @@ mod test {
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assert_eq!(run("-40 °F"), Ok("-40 °C".to_string()));
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assert_eq!(run("0 °F"), Ok("-17.78 °C".to_string()));
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assert_eq!(run("32 °F"), Ok("0 °C".to_string()));
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// Area
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assert_eq!(run("1 in²"), Ok("6.452 cm²".to_string()));
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assert_eq!(run("1 ft²"), Ok("929 cm²".to_string()));
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assert_eq!(run("1 acre"), Ok("4 047 m²".to_string()));
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assert_eq!(run("1 mi²"), Ok("2.59 km²".to_string()));
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}
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}
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34
src/parse.rs
34
src/parse.rs
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@ -101,6 +101,23 @@ fn parse_unit(input: String) -> Result<NonMetric, ParseError> {
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"°F" => Ok(NonMetric::Fahrenheit),
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"F" => Ok(NonMetric::Fahrenheit),
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// Area
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"inch²" => Ok(NonMetric::SquareInch),
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"inches²" => Ok(NonMetric::SquareInch),
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"in²" => Ok(NonMetric::SquareInch),
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"foot²" => Ok(NonMetric::SquareFoot),
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"feet²" => Ok(NonMetric::SquareFoot),
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"ft²" => Ok(NonMetric::SquareFoot),
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"acre" => Ok(NonMetric::Acre),
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"acres" => Ok(NonMetric::Acre),
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"ac" => Ok(NonMetric::Acre),
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"mile²" => Ok(NonMetric::SquareMile),
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"miles²" => Ok(NonMetric::SquareMile),
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"mi²" => Ok(NonMetric::SquareMile),
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_ => Err(ParseError::UnknownUnit(input)),
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}
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}
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@ -249,6 +266,23 @@ mod test {
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assert_eq!(parse_unit("°F".to_string()), Ok(NonMetric::Fahrenheit));
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assert_eq!(parse_unit("F".to_string()), Ok(NonMetric::Fahrenheit));
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// Area
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assert_eq!(parse_unit("inch²".to_string()), Ok(NonMetric::SquareInch));
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assert_eq!(parse_unit("inches²".to_string()), Ok(NonMetric::SquareInch));
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assert_eq!(parse_unit("in²".to_string()), Ok(NonMetric::SquareInch));
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assert_eq!(parse_unit("foot²".to_string()), Ok(NonMetric::SquareFoot));
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assert_eq!(parse_unit("feet²".to_string()), Ok(NonMetric::SquareFoot));
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assert_eq!(parse_unit("ft²".to_string()), Ok(NonMetric::SquareFoot));
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assert_eq!(parse_unit("acre".to_string()), Ok(NonMetric::Acre));
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assert_eq!(parse_unit("acres".to_string()), Ok(NonMetric::Acre));
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assert_eq!(parse_unit("ac".to_string()), Ok(NonMetric::Acre));
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assert_eq!(parse_unit("mile²".to_string()), Ok(NonMetric::SquareMile));
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assert_eq!(parse_unit("miles²".to_string()), Ok(NonMetric::SquareMile));
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assert_eq!(parse_unit("mi²".to_string()), Ok(NonMetric::SquareMile));
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// Unknown unit
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assert_eq!(parse_unit("hutenosa".to_string()), Err(ParseError::UnknownUnit("hutenosa".to_string())));
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}
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@ -3,6 +3,7 @@ pub enum Metric {
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Metre,
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Gram,
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Celcius,
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SquareMetre,
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}
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#[derive(Clone, Copy, Debug, PartialEq)]
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@ -18,6 +19,11 @@ pub enum NonMetric {
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Stone,
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// Temperature
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Fahrenheit,
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// Area
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SquareInch,
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SquareFoot,
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Acre,
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SquareMile,
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}
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#[derive(Clone, Copy, Debug, PartialEq)]
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