start on random instruction

src/gp/utils.rs

@@ -1,6 +1,23 @@
+use crate::gp::args::ClosingType;
+use crate::push::state::Gene;
 use rand::Rng;
+use rand::seq::IndexedRandom;
 use rust_decimal::prelude::*;
 
+pub fn random_instruction(
+    instructions: Vec<Gene>,
+    closing_type: ClosingType,
+    rng: &mut impl Rng,
+) -> Gene {
+    match closing_type {
+        ClosingType::Specified => return instructions.choose(rng).unwrap().clone(),
+        ClosingType::Balanced => {
+            let 
+        }
+        _ => todo!(),
+    }
+}
+
 pub fn gaussian_noise_factor(rng: &mut impl Rng) -> Decimal {
     let u0f64: f64 = rng.random();
     let u1f64: f64 = rng.random();

src/gp/variation.rs

@@ -125,6 +125,10 @@ fn alternation(
     }
 }
 
+fn uniform_addition(plushy: Vec<Gene>, instructions: Vec<Gene>, umad_rate: Decimal) {
+    let mut new_plushy: Vec<Gene> = vec![];
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;