From 20b14081790b678672e22b1bea6b196e5128da5d Mon Sep 17 00:00:00 2001
From: Alex Bethel <abethel@cs.nmt.edu>
Date: Tue, 14 Dec 2021 16:16:28 -0600
Subject: [PATCH] Implement function chain division

---
 ablescript/src/variables.rs | 65 +++++++++++++++++++++----------------
 1 file changed, 37 insertions(+), 28 deletions(-)

diff --git a/ablescript/src/variables.rs b/ablescript/src/variables.rs
index 90d00b6..5d42a19 100644
--- a/ablescript/src/variables.rs
+++ b/ablescript/src/variables.rs
@@ -617,39 +617,48 @@ impl ops::Div for Value {
             })),
             Value::Bool(b) => Value::Bool(!b || rhs.into_bool()),
             Value::Abool(_) => !self + rhs,
-            Value::Functio(f) => {
-                let fraction = 1.0 / rhs.into_i32() as f64;
-                Value::Functio(match f {
+            Value::Functio(f) => Value::Functio(match f {
+                Functio::Bf {
+                    instructions,
+                    tape_len,
+                } => {
+                    let fraction = 1.0 / rhs.into_i32() as f64;
+                    let len = instructions.len();
                     Functio::Bf {
-                        instructions,
+                        instructions: instructions
+                            .into_iter()
+                            .take((len as f64 * fraction) as usize)
+                            .collect(),
                         tape_len,
-                    } => {
-                        let len = instructions.len();
-                        Functio::Bf {
-                            instructions: instructions
-                                .into_iter()
-                                .take((len as f64 * fraction) as usize)
-                                .collect(),
-                            tape_len,
-                        }
                     }
-                    Functio::Able { params, body } => {
-                        let len = body.len();
-                        Functio::Able {
-                            params,
-                            body: body
-                                .into_iter()
-                                .take((len as f64 * fraction) as usize)
-                                .collect(),
-                        }
+                }
+                Functio::Able { params, body } => {
+                    let fraction = 1.0 / rhs.into_i32() as f64;
+                    let len = body.len();
+                    Functio::Able {
+                        params,
+                        body: body
+                            .into_iter()
+                            .take((len as f64 * fraction) as usize)
+                            .collect(),
                     }
-                    Functio::Chain { .. } => todo!(":P"),
-                    Functio::Eval(s) => {
-                        let len = s.len();
-                        Functio::Eval(s.chars().take((len as f64 * fraction) as usize).collect())
+                }
+                Functio::Chain { functios, kind } => {
+                    let functios = *functios;
+                    Functio::Chain {
+                        functios: Box::new((
+                            (Value::Functio(functios.0) / rhs.clone()).into_functio(),
+                            (Value::Functio(functios.1) / rhs).into_functio(),
+                        )),
+                        kind,
                     }
-                })
-            }
+                }
+                Functio::Eval(s) => {
+                    let fraction = 1.0 / rhs.into_i32() as f64;
+                    let len = s.len();
+                    Functio::Eval(s.chars().take((len as f64 * fraction) as usize).collect())
+                }
+            }),
             Value::Cart(c) => {
                 let cart_len = c.len();
                 let chunk_len = rhs.into_i32() as usize;