parsing: remove unused code from FlatExWrapper

parsing/src/parsing.rs

@@ -4,21 +4,14 @@ use std::collections::HashMap;
 #[derive(Clone, PartialEq)]
 pub struct FlatExWrapper {
     func: Option<FlatEx<f64>>,
-    func_str: Option<String>,
 }
 
 impl FlatExWrapper {
-    const EMPTY: FlatExWrapper = FlatExWrapper {
+    const EMPTY: FlatExWrapper = FlatExWrapper { func: None };
-        func: None,
-        func_str: None,
-    };
 
     #[inline]
     const fn new(f: FlatEx<f64>) -> Self {
-        Self {
+        Self { func: Some(f) }
-            func: Some(f),
-            func_str: None,
-        }
     }
 
     #[inline]
@@ -34,26 +27,6 @@ impl FlatExWrapper {
             .unwrap_or(f64::NAN)
     }
 
-    #[inline]
-    fn partial(&self, x: usize) -> Self {
-        self.func
-            .as_ref()
-            .map(|f| f.clone().partial(x).map(Self::new).unwrap_or(Self::EMPTY))
-            .unwrap_or(Self::EMPTY)
-    }
-
-    #[inline]
-    fn get_string(&mut self) -> String {
-        match self.func_str {
-            Some(ref func_str) => func_str.clone(),
-            None => {
-                let calculated = self.func.as_ref().map(|f| f.unparse()).unwrap_or("");
-                self.func_str = Some(calculated.to_owned());
-                calculated.to_owned()
-            }
-        }
-    }
-
     #[inline]
     fn partial_iter(&self, n: usize) -> Self {
         self.func
@@ -165,17 +138,7 @@ impl BackingFunction {
     }
 }
 
-fn prettyify_function_str(func: &str) -> String {
-    let new_str = func.replace("{x}", "x");
 
-    if &new_str == "0/0" {
-        "Undefined".to_owned()
-    } else {
-        new_str
-    }
-}
-
-// pub const VALID_VARIABLES: [char; 3] = ['x', 'e', 'π'];
 
 /// Case insensitive checks for if `c` is a character used to represent a variable
 #[inline]