rewrite progress

This commit is contained in:
Simon Gardling
2022-02-25 09:47:41 -05:00
parent 27601d7ddd
commit 0c538cb7fd
6 changed files with 196 additions and 28 deletions

View File

@@ -5,6 +5,7 @@ EXTREMELY Janky function that tries to put asterisks in the proper places to be
One limitation though, variables with multiple characters like `pi` cannot be multiplied (like `pipipipi` won't result in `pi*pi*pi*pi`). But that's such a niche use case (and that same thing could be done by using exponents) that it doesn't really matter.
In the future I may want to completely rewrite this or implement this natively into mevel-rs (which would probably be good to do)
*/
#[inline]
pub fn add_asterisks(function_in: String) -> String {
let function = function_in.replace("log10(", "log(").replace("pi", "π"); // pi -> π and log10 -> log
let valid_variables: Vec<char> = "xeπ".chars().collect();
@@ -78,6 +79,7 @@ pub fn add_asterisks(function_in: String) -> String {
}
// Tests function to make sure it's able to be parsed. Returns the string of the Error produced, or an empty string if it runs successfully.
#[inline]
pub fn test_func(function_string: String) -> String {
// Factorials do not work, and it would be really difficult to make them work
if function_string.contains('!') {
@@ -108,35 +110,12 @@ pub fn test_func(function_string: String) -> String {
}
// Rounds f64 to specific number of digits
#[inline]
pub fn digits_precision(x: f64, digits: usize) -> f64 {
let large_number: f64 = 10.0_f64.powf(digits as f64);
(x * large_number).round() / large_number
}
pub struct Function {
function: Box<dyn Fn(f64) -> f64>,
func_str: String,
}
impl Function {
pub fn from_string(func_str: String) -> Self {
let expr: Expr = func_str.parse().unwrap();
let func = expr.bind("x").unwrap();
Self {
function: Box::new(func),
func_str,
}
}
#[inline]
pub fn run(&self, x: f64) -> f64 { (self.function)(x) }
pub fn str_compare(&self, other_string: String) -> bool { self.func_str == other_string }
#[allow(dead_code)]
pub fn get_string(&self) -> String { self.func_str.clone() }
}
pub struct Cache<T> {
backing_data: Option<T>,
}