Replace PartialEq with a manual implementation

Author: Radonirinaunimi

pineappl/src/interpolation.rs

@@ -3,6 +3,7 @@
 use super::convert;
 use super::packed_array::PackedArray;
 use arrayvec::ArrayVec;
+use float_cmp::approx_eq;
 use serde::{Deserialize, Serialize};
 use std::mem;
 use std::ops::Range;
@@ -89,7 +90,7 @@ pub enum InterpMeth {
 }
 
 /// TODO
-#[derive(Clone, Deserialize, PartialEq, Serialize)]
+#[derive(Clone, Deserialize, Serialize)]
 pub struct Interp {
     min: f64,
     max: f64,
@@ -100,6 +101,20 @@ pub struct Interp {
     interp_meth: InterpMeth,
 }
 
+impl PartialEq for Interp {
+    fn eq(&self, other: &Self) -> bool {
+        self.nodes == other.nodes
+            && self.order == other.order
+            && self.reweight == other.reweight
+            && self.map == other.map
+            && self.interp_meth == other.interp_meth
+            && approx_eq!(f64, self.min, other.min, ulps = 1)
+            && approx_eq!(f64, self.max, other.max, ulps = 1)
+    }
+}
+
+impl Eq for Interp {}
+
 impl Interp {
     /// TODO
     ///