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feat: allow changing max_digits for pretty_eval

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This commit is contained in:
electria 2026-10-04 16:27:34 -07:00
commit 0afc7aab25
Signed by: electria
SSH key fingerprint: SHA256:8LlB3ucPbBHqozqkhsNbaV5oG3SlzzqUj8FZDL6IPQs
2 changed files with 13 additions and 15 deletions
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26
src/formatting.rs
View file

@ -2,9 +2,7 @@ use rug::Float;
use crate::nodes::{self, Error};
pub const MAX_DIGITS: usize = 10;
pub fn pretty_eval(mut input: String) -> Result<String, Error> {
pub fn pretty_eval(mut input: String, max_digits: usize) -> Result<String, Error> {
// no need to remove the characters here,
// as we ignore the them in all other logic already
let should_add_back_alignment = input.contains('&');
@ -21,7 +19,7 @@ pub fn pretty_eval(mut input: String) -> Result<String, Error> {
let result = nodes::eval(&input)?;
let display_digits =
get_significant_digits(&result)
.min(MAX_DIGITS)
.min(max_digits)
.max(if result >= 1000 || result < 1 {
1
} else if result >= 100 {
@ -51,20 +49,20 @@ pub fn pretty_eval(mut input: String) -> Result<String, Error> {
}
#[test]
fn test_character_readdition() {
assert_eq!(pretty_eval(" = 11".into()).unwrap(), " = 11");
assert_eq!(pretty_eval(" &= 11".into()).unwrap(), " & = 11");
assert_eq!(pretty_eval(" & 11".into()).unwrap(), " & 11");
assert_eq!(pretty_eval(" & 11 \\".into()).unwrap(), " & 11 \\");
assert_eq!(pretty_eval(" = 11".into(), 10).unwrap(), " = 11");
assert_eq!(pretty_eval(" &= 11".into(), 10).unwrap(), " & = 11");
assert_eq!(pretty_eval(" & 11".into(), 10).unwrap(), " & 11");
assert_eq!(pretty_eval(" & 11 \\".into(), 10).unwrap(), " & 11 \\");
}
#[test]
fn test_basic_up_to_999() {
assert_eq!(pretty_eval("1".into()).unwrap(), "1");
assert_eq!(pretty_eval("10".into()).unwrap(), "10");
assert_eq!(pretty_eval("100".into()).unwrap(), "100");
assert_eq!(pretty_eval("999".into()).unwrap(), "999");
assert_eq!(pretty_eval("1000".into()).unwrap(), "1 * 10^3");
assert_eq!(pretty_eval("1".into(), 10).unwrap(), "1");
assert_eq!(pretty_eval("10".into(), 10).unwrap(), "10");
assert_eq!(pretty_eval("100".into(), 10).unwrap(), "100");
assert_eq!(pretty_eval("999".into(), 10).unwrap(), "999");
assert_eq!(pretty_eval("1000".into(), 10).unwrap(), "1 * 10^3");
assert_eq!(pretty_eval("11.111111".into()).unwrap(), "11.111111");
assert_eq!(pretty_eval("11.111111".into(), 10).unwrap(), "11.111111");
}
pub fn get_significant_digits(n: &Float) -> usize {

2
src/main.rs
View file

@ -17,7 +17,7 @@ fn main() -> ExitCode {
}
};
match formatting::pretty_eval(input) {
match formatting::pretty_eval(input, 10) {
Ok(s) => println!("{s}"),
Err(e) => {