Adding None enum to keep/drop, cleaning up matches
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2d9853fbf0
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@ -18,20 +18,9 @@ pub struct Dice {
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impl fmt::Display for Dice {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match self.keep_drop {
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KeepOrDrop::Keep(keep) => {
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if keep != self.count {
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write!(f, "{}d{}k{}", self.count, self.sides, keep)
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} else {
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write!(f, "{}d{}", self.count, self.sides)
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}
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}
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KeepOrDrop::Drop(drop) => {
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if drop != 0 {
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write!(f, "{}d{}dh{}", self.count, self.sides, drop)
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} else {
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write!(f, "{}d{}", self.count, self.sides)
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}
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}
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KeepOrDrop::Keep(keep) => write!(f, "{}d{}k{}", self.count, self.sides, keep),
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KeepOrDrop::Drop(drop) => write!(f, "{}d{}dh{}", self.count, self.sides, drop),
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KeepOrDrop::None => write!(f, "{}d{}", self.count, self.sides),
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}
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}
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}
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@ -40,6 +29,7 @@ impl fmt::Display for Dice {
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pub enum KeepOrDrop {
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Keep (u32),
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Drop (u32),
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None,
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}
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impl Dice {
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@ -39,7 +39,7 @@ fn parse_dice(input: &str) -> IResult<&str, Dice> {
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// check for keep expression to keep highest dice (2d20k1)
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let (keep, input) = match tuple::<&str, _, (_, _), _>((tag("k"), digit1))(input) {
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// if ok, keep expression is present
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Ok(r) => (r.1.1, r.0),
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Ok((rest, (_, keep_amount))) => (keep_amount, rest),
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// otherwise absent and keep all dice
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Err(_) => ("", input)
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};
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@ -47,7 +47,7 @@ fn parse_dice(input: &str) -> IResult<&str, Dice> {
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// check for drop expression to drop highest dice (2d20dh1)
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let (drop, input) = match tuple::<&str, _, (_, _), _>((tag("dh"), digit1))(input) {
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// if ok, keep expression is present
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Ok(r) => (r.1.1, r.0),
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Ok((rest, (_, drop_amount))) => (drop_amount, rest),
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// otherwise absent and keep all dice
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Err(_) => ("", input)
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};
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@ -57,26 +57,20 @@ fn parse_dice(input: &str) -> IResult<&str, Dice> {
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// don't allow keep greater than number of dice, and don't allow keep zero
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let keep_drop = match keep.parse::<u32>() {
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// Ok, there's a keep value, check and create Keep
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Ok(i) => {
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if i > count || i == 0 {
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KeepOrDrop::Keep(count)
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} else {
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KeepOrDrop::Keep(i)
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}
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Ok(i) => match i {
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_i if _i > count || _i == 0 => KeepOrDrop::None,
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i => KeepOrDrop::Keep(i),
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},
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// Err, check if drop works
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Err(_) => {
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match drop.parse::<u32>() {
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// Ok, there's a drop value, check and create Drop
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Ok(i) => {
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if i >= count {
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KeepOrDrop::Keep(count)
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} else {
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KeepOrDrop::Drop(i)
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}
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Ok(i) => match i {
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_i if i >= count => KeepOrDrop::None,
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i => KeepOrDrop::Drop(i),
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},
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// Err, there's neither keep nor drop
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Err(_) => KeepOrDrop::Keep(count),
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Err(_) => KeepOrDrop::None,
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}
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},
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};
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@ -155,25 +149,25 @@ mod tests {
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use super::*;
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#[test]
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fn dice_test() {
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assert_eq!(parse_dice("2d4"), Ok(("", Dice::new(2, 4, KeepOrDrop::Keep(2)))));
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assert_eq!(parse_dice("20d40"), Ok(("", Dice::new(20, 40, KeepOrDrop::Keep(20)))));
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assert_eq!(parse_dice("8d7"), Ok(("", Dice::new(8, 7, KeepOrDrop::Keep(8)))));
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assert_eq!(parse_dice("2d4"), Ok(("", Dice::new(2, 4, KeepOrDrop::None))));
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assert_eq!(parse_dice("20d40"), Ok(("", Dice::new(20, 40, KeepOrDrop::None))));
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assert_eq!(parse_dice("8d7"), Ok(("", Dice::new(8, 7, KeepOrDrop::None))));
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assert_eq!(parse_dice("2d20k1"), Ok(("", Dice::new(2, 20, KeepOrDrop::Keep(1)))));
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assert_eq!(parse_dice("100d10k90"), Ok(("", Dice::new(100, 10, KeepOrDrop::Keep(90)))));
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assert_eq!(parse_dice("11d10k10"), Ok(("", Dice::new(11, 10, KeepOrDrop::Keep(10)))));
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assert_eq!(parse_dice("12d10k11"), Ok(("", Dice::new(12, 10, KeepOrDrop::Keep(11)))));
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assert_eq!(parse_dice("12d10k13"), Ok(("", Dice::new(12, 10, KeepOrDrop::Keep(12)))));
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assert_eq!(parse_dice("12d10k0"), Ok(("", Dice::new(12, 10, KeepOrDrop::Keep(12)))));
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assert_eq!(parse_dice("12d10k13"), Ok(("", Dice::new(12, 10, KeepOrDrop::None))));
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assert_eq!(parse_dice("12d10k0"), Ok(("", Dice::new(12, 10, KeepOrDrop::None))));
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assert_eq!(parse_dice("20d40dh5"), Ok(("", Dice::new(20, 40, KeepOrDrop::Drop(5)))));
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assert_eq!(parse_dice("8d7dh9"), Ok(("", Dice::new(8, 7, KeepOrDrop::Keep(8)))));
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assert_eq!(parse_dice("8d7dh8"), Ok(("", Dice::new(8, 7, KeepOrDrop::Keep(8)))));
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assert_eq!(parse_dice("8d7dh9"), Ok(("", Dice::new(8, 7, KeepOrDrop::None))));
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assert_eq!(parse_dice("8d7dh8"), Ok(("", Dice::new(8, 7, KeepOrDrop::None))));
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}
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#[test]
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fn element_test() {
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assert_eq!(
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parse_element(" \t\n\r\n 8d7 \n"),
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Ok((" \n", Element::Dice(Dice::new(8, 7, KeepOrDrop::Keep(8)))))
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Ok((" \n", Element::Dice(Dice::new(8, 7, KeepOrDrop::None))))
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);
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assert_eq!(
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parse_element(" \t\n\r\n 3d20k2 \n"),
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@ -199,7 +193,7 @@ mod tests {
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parse_signed_element(" \t\n\r\n- 8d4 \n"),
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Ok((
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" \n",
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SignedElement::Negative(Element::Dice(Dice::new(8, 4, KeepOrDrop::Keep(8))))
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SignedElement::Negative(Element::Dice(Dice::new(8, 4, KeepOrDrop::None)))
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))
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);
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assert_eq!(
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@ -213,7 +207,7 @@ mod tests {
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parse_signed_element(" \t\n\r\n+ 8d4 \n"),
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Ok((
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" \n",
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SignedElement::Positive(Element::Dice(Dice::new(8, 4, KeepOrDrop::Keep(8))))
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SignedElement::Positive(Element::Dice(Dice::new(8, 4, KeepOrDrop::None)))
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))
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);
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}
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@ -225,7 +219,7 @@ mod tests {
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Ok((
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"",
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ElementExpression(vec![SignedElement::Positive(Element::Dice(Dice::new(
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8, 4, KeepOrDrop::Keep(8)
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8, 4, KeepOrDrop::None
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)))])
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))
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);
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@ -244,7 +238,7 @@ mod tests {
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Ok((
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" \n ",
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ElementExpression(vec![SignedElement::Negative(Element::Dice(Dice::new(
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8, 4, KeepOrDrop::Keep(8)
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8, 4, KeepOrDrop::None
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)))])
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))
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);
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@ -257,7 +251,7 @@ mod tests {
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SignedElement::Positive(Element::Bonus(7)),
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SignedElement::Negative(Element::Bonus(5)),
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SignedElement::Negative(Element::Dice(Dice::new(6, 12, KeepOrDrop::Drop(3)))),
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SignedElement::Positive(Element::Dice(Dice::new(1, 1, KeepOrDrop::Keep(1)))),
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SignedElement::Positive(Element::Dice(Dice::new(1, 1, KeepOrDrop::None))),
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SignedElement::Positive(Element::Bonus(53)),
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])
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))
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@ -90,6 +90,7 @@ impl Roll for dice::Dice {
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match self.keep_drop {
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KeepOrDrop::Keep(k) => DiceRoll(rolls,k as usize, 0),
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KeepOrDrop::Drop(dh) => DiceRoll(rolls,self.count as usize, dh as usize),
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KeepOrDrop::None => DiceRoll(rolls,self.count as usize, 0),
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}
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}
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}
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