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Adding enum for exclusive drop/keep

This commit is contained in:
Matthew Sparks 2021-09-17 23:11:13 -04:00
parent 8b5973475f
commit 3d6210b32d
3 changed files with 80 additions and 47 deletions
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34
dicebot/src/basic/dice.rs
View File

@ -12,25 +12,39 @@ use std::ops::{Deref, DerefMut};
pub struct Dice {
pub(crate) count: u32,
pub(crate) sides: u32,
pub(crate) keep: u32,
pub(crate) drop: u32,
pub(crate) keep_drop: KeepOrDrop,
}
impl fmt::Display for Dice {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if self.keep != self.count {
write!(f, "{}d{}k{}", self.count, self.sides, self.keep)
} else if self.drop != 0 {
write!(f, "{}d{}d{}", self.count, self.sides, self.drop)
} else {
write!(f, "{}d{}", self.count, self.sides)
match self.keep_drop {
KeepOrDrop::Keep(keep) => {
if keep != self.count {
write!(f, "{}d{}k{}", self.count, self.sides, keep)
} else {
write!(f, "{}d{}", self.count, self.sides)
}
}
KeepOrDrop::Drop(drop) => {
if drop != 0 {
write!(f, "{}d{}dh{}", self.count, self.sides, drop)
} else {
write!(f, "{}d{}", self.count, self.sides)
}
}
}
}
}
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum KeepOrDrop {
Keep (u32),
Drop (u32),
}
impl Dice {
pub fn new(count: u32, sides: u32, keep: u32, drop: u32) -> Dice {
Dice { count, sides, keep, drop }
pub fn new(count: u32, sides: u32, keep_drop: KeepOrDrop) -> Dice {
Dice { count, sides, keep_drop }
}
}

87
dicebot/src/basic/parser.rs
View File

@ -41,7 +41,7 @@ fn parse_dice(input: &str) -> IResult<&str, Dice> {
// if ok, keep expression is present
Ok(r) => (r.1.1, r.0),
// otherwise absent and keep all dice
Err(_) => (count, input)
Err(_) => ("", input)
};
// check for drop expression to drop highest dice (2d20dh1)
@ -49,26 +49,41 @@ fn parse_dice(input: &str) -> IResult<&str, Dice> {
// if ok, keep expression is present
Ok(r) => (r.1.1, r.0),
// otherwise absent and keep all dice
Err(_) => ("0", input)
Err(_) => ("", input)
};
let count: u32 = count.parse().unwrap();
// don't allow keep greater than number of dice, and don't allow keep zero
let mut keep: u32 = keep.parse().unwrap();
if keep > count || keep == 0 {
keep = count;
}
// don't allow drop greater than or equal to number of dice
let mut drop: u32 = drop.parse().unwrap();
if drop >= count {
drop = 0;
}
let keep_drop = match keep.parse::<u32>() {
// Ok, there's a keep value, check and create Keep
Ok(i) => {
if i > count || i == 0 {
KeepOrDrop::Keep(count)
} else {
KeepOrDrop::Keep(i)
}
},
// Err, check if drop works
Err(_) => {
match drop.parse::<u32>() {
// Ok, there's a drop value, check and create Drop
Ok(i) => {
if i >= count {
KeepOrDrop::Keep(count)
} else {
KeepOrDrop::Drop(i)
}
},
// Err, there's neither keep nor drop
Err(_) => KeepOrDrop::Keep(count),
}
},
};
Ok((
input,
Dice::new(count, sides.parse().unwrap(), keep, drop),
Dice::new(count, sides.parse().unwrap(), keep_drop),
))
}
@ -140,29 +155,29 @@ mod tests {
use super::*;
#[test]
fn dice_test() {
assert_eq!(parse_dice("2d4"), Ok(("", Dice::new(2, 4, 2, 0))));
assert_eq!(parse_dice("20d40"), Ok(("", Dice::new(20, 40, 20, 0))));
assert_eq!(parse_dice("8d7"), Ok(("", Dice::new(8, 7, 8, 0))));
assert_eq!(parse_dice("2d20k1"), Ok(("", Dice::new(2, 20, 1, 0))));
assert_eq!(parse_dice("100d10k90"), Ok(("", Dice::new(100, 10, 90, 0))));
assert_eq!(parse_dice("11d10k10"), Ok(("", Dice::new(11, 10, 10, 0))));
assert_eq!(parse_dice("12d10k11"), Ok(("", Dice::new(12, 10, 11, 0))));
assert_eq!(parse_dice("12d10k13"), Ok(("", Dice::new(12, 10, 12, 0))));
assert_eq!(parse_dice("12d10k0"), Ok(("", Dice::new(12, 10, 12, 0))));
assert_eq!(parse_dice("20d40dh5"), Ok(("", Dice::new(20, 40, 20, 5))));
assert_eq!(parse_dice("8d7dh9"), Ok(("", Dice::new(8, 7, 8, 0))));
assert_eq!(parse_dice("8d7dh8"), Ok(("", Dice::new(8, 7, 8, 0))));
assert_eq!(parse_dice("2d4"), Ok(("", Dice::new(2, 4, KeepOrDrop::Keep(2)))));
assert_eq!(parse_dice("20d40"), Ok(("", Dice::new(20, 40, KeepOrDrop::Keep(20)))));
assert_eq!(parse_dice("8d7"), Ok(("", Dice::new(8, 7, KeepOrDrop::Keep(8)))));
assert_eq!(parse_dice("2d20k1"), Ok(("", Dice::new(2, 20, KeepOrDrop::Keep(1)))));
assert_eq!(parse_dice("100d10k90"), Ok(("", Dice::new(100, 10, KeepOrDrop::Keep(90)))));
assert_eq!(parse_dice("11d10k10"), Ok(("", Dice::new(11, 10, KeepOrDrop::Keep(10)))));
assert_eq!(parse_dice("12d10k11"), Ok(("", Dice::new(12, 10, KeepOrDrop::Keep(11)))));
assert_eq!(parse_dice("12d10k13"), Ok(("", Dice::new(12, 10, KeepOrDrop::Keep(12)))));
assert_eq!(parse_dice("12d10k0"), Ok(("", Dice::new(12, 10, KeepOrDrop::Keep(12)))));
assert_eq!(parse_dice("20d40dh5"), Ok(("", Dice::new(20, 40, KeepOrDrop::Drop(5)))));
assert_eq!(parse_dice("8d7dh9"), Ok(("", Dice::new(8, 7, KeepOrDrop::Keep(8)))));
assert_eq!(parse_dice("8d7dh8"), Ok(("", Dice::new(8, 7, KeepOrDrop::Keep(8)))));
}
#[test]
fn element_test() {
assert_eq!(
parse_element(" \t\n\r\n 8d7 \n"),
Ok((" \n", Element::Dice(Dice::new(8, 7, 8, 0))))
Ok((" \n", Element::Dice(Dice::new(8, 7, KeepOrDrop::Keep(8)))))
);
assert_eq!(
parse_element(" \t\n\r\n 3d20k2 \n"),
Ok((" \n", Element::Dice(Dice::new(3, 20, 2, 0))))
Ok((" \n", Element::Dice(Dice::new(3, 20, KeepOrDrop::Keep(2)))))
);
assert_eq!(
parse_element(" \t\n\r\n 8 \n"),
@ -184,21 +199,21 @@ mod tests {
parse_signed_element(" \t\n\r\n- 8d4 \n"),
Ok((
" \n",
SignedElement::Negative(Element::Dice(Dice::new(8, 4, 8, 0)))
SignedElement::Negative(Element::Dice(Dice::new(8, 4, KeepOrDrop::Keep(8))))
))
);
assert_eq!(
parse_signed_element(" \t\n\r\n- 8d4k4 \n"),
Ok((
" \n",
SignedElement::Negative(Element::Dice(Dice::new(8, 4, 4, 0)))
SignedElement::Negative(Element::Dice(Dice::new(8, 4, KeepOrDrop::Keep(4))))
))
);
assert_eq!(
parse_signed_element(" \t\n\r\n+ 8d4 \n"),
Ok((
" \n",
SignedElement::Positive(Element::Dice(Dice::new(8, 4, 8, 0)))
SignedElement::Positive(Element::Dice(Dice::new(8, 4, KeepOrDrop::Keep(8))))
))
);
}
@ -210,7 +225,7 @@ mod tests {
Ok((
"",
ElementExpression(vec![SignedElement::Positive(Element::Dice(Dice::new(
8, 4, 8, 0
8, 4, KeepOrDrop::Keep(8)
)))])
))
);
@ -219,7 +234,7 @@ mod tests {
Ok((
"",
ElementExpression(vec![
SignedElement::Positive(Element::Dice(Dice::new(2, 20, 1, 0))),
SignedElement::Positive(Element::Dice(Dice::new(2, 20, KeepOrDrop::Keep(1)))),
SignedElement::Positive(Element::Bonus(5)),
])
))
@ -229,7 +244,7 @@ mod tests {
Ok((
" \n ",
ElementExpression(vec![SignedElement::Negative(Element::Dice(Dice::new(
8, 4, 8, 0
8, 4, KeepOrDrop::Keep(8)
)))])
))
);
@ -238,11 +253,11 @@ mod tests {
Ok((
" 1d5 ",
ElementExpression(vec![
SignedElement::Positive(Element::Dice(Dice::new(3, 4, 2, 0))),
SignedElement::Positive(Element::Dice(Dice::new(3, 4, KeepOrDrop::Keep(2)))),
SignedElement::Positive(Element::Bonus(7)),
SignedElement::Negative(Element::Bonus(5)),
SignedElement::Negative(Element::Dice(Dice::new(6, 12, 6, 3))),
SignedElement::Positive(Element::Dice(Dice::new(1, 1, 1, 0))),
SignedElement::Negative(Element::Dice(Dice::new(6, 12, KeepOrDrop::Drop(3)))),
SignedElement::Positive(Element::Dice(Dice::new(1, 1, KeepOrDrop::Keep(1)))),
SignedElement::Positive(Element::Bonus(53)),
])
))

6
dicebot/src/basic/roll.rs
View File

@ -4,6 +4,7 @@
* project.
*/
use crate::basic::dice;
use crate::basic::dice::KeepOrDrop;
use rand::prelude::*;
use std::fmt;
use std::ops::{Deref, DerefMut};
@ -86,7 +87,10 @@ impl Roll for dice::Dice {
// sort rolls in descending order
rolls.sort_by(|a, b| b.cmp(a));
DiceRoll(rolls,self.keep as usize, self.drop as usize)
match self.keep_drop {
KeepOrDrop::Keep(k) => DiceRoll(rolls,k as usize, 0),
KeepOrDrop::Drop(dh) => DiceRoll(rolls,self.count as usize, dh as usize),
}
}
}