simplify posint example

remove setup_hex_master() / setup_dec_master() functions and instead directly call apply_morphism()

examples/tty-04-posint/src/main.rs

@@ -32,28 +32,6 @@ use {
     std::sync::{Arc, RwLock},
 };
 
-fn setup_hex_master(ctx: &Arc<RwLock<Context>>, rt_int: &Arc<RwLock<ReprTree>>) {
-    rt_int.write().unwrap().detach( ctx );
-    ctx.read().unwrap().apply_morphism(
-        rt_int,
-        &laddertypes::MorphismType {
-            src_type: Context::parse(&ctx, "ℕ ~ <PosInt 16 BigEndian> ~ <Seq <Digit 16>> ~ <List <Digit 16> ~ Char> ~ EditTree"),
-            dst_type: Context::parse(&ctx, "ℕ ~ <PosInt 10 BigEndian> ~ <Seq <Digit 10>> ~ <List <Digit 10> ~ Char> ~ EditTree")
-        }
-    );
-}
-
-fn setup_dec_master(ctx: &Arc<RwLock<Context>>, rt_int: &Arc<RwLock<ReprTree>>) {
-    rt_int.write().unwrap().detach( ctx );
-    ctx.read().unwrap().apply_morphism(
-        rt_int,
-        &laddertypes::MorphismType {
-            src_type: Context::parse(&ctx, "ℕ ~ <PosInt 10 BigEndian> ~ <Seq <Digit 10>> ~ <List <Digit 10> ~ Char> ~ EditTree"),
-            dst_type: Context::parse(&ctx, "ℕ ~ <PosInt 16 BigEndian> ~ <Seq <Digit 16>> ~ <List <Digit 16> ~ Char> ~ EditTree")
-        }
-    );
-}
-
 #[async_std::main]
 async fn main() {
     /* setup context
@@ -92,7 +70,16 @@ async fn main() {
             dst_type: Context::parse(&ctx, "ℕ ~ <PosInt 16 BigEndian> ~ <Seq <Digit 16>> ~ <List <Digit 16> ~ Char> ~ EditTree")
         });
 
-    setup_hex_master(&ctx, &rt_int);
+    /* set Hex-editor to be master
+     */
+    rt_int.write().unwrap().detach( &ctx );
+    ctx.read().unwrap().apply_morphism(
+        &rt_int,
+        &laddertypes::MorphismType {
+            src_type: Context::parse(&ctx, "ℕ ~ <PosInt 16 BigEndian> ~ <Seq <Digit 16>> ~ <List <Digit 16> ~ Char> ~ EditTree"),
+            dst_type: Context::parse(&ctx, "ℕ ~ <PosInt 10 BigEndian> ~ <Seq <Digit 10>> ~ <List <Digit 10> ~ Char> ~ EditTree")
+        }
+    );
 
     let edittree_hex_be_list = ctx.read().unwrap()
         .setup_edittree(
@@ -174,14 +161,24 @@ async fn main() {
                     0 => {
                         let mut li = last_idx.write().unwrap();
                         if *li != 0 {
-                            setup_hex_master(&ctx, &rt_int);
+                            rt_int.write().unwrap().detach( &ctx );
+                            ctx.read().unwrap().apply_morphism(&rt_int, &laddertypes::MorphismType {
+                                src_type: Context::parse(&ctx, "ℕ ~ <PosInt 16 BigEndian> ~ <Seq~List <Digit 16> ~ Char> ~ EditTree"),
+                                dst_type: Context::parse(&ctx, "ℕ ~ <PosInt 10 BigEndian> ~ <Seq~List <Digit 10> ~ Char> ~ EditTree")
+                            });
+
                             *li = 0;
                         }
                     }
                     1 => {
                         let mut li = last_idx.write().unwrap();
                         if *li != 1 {
-                            setup_dec_master(&ctx, &rt_int);
+                            rt_int.write().unwrap().detach( &ctx );
+                            ctx.read().unwrap().apply_morphism(&rt_int, &laddertypes::MorphismType {
+                                src_type: Context::parse(&ctx, "ℕ ~ <PosInt 10 BigEndian> ~ <Seq~List <Digit 10> ~ Char> ~ EditTree"),
+                                dst_type: Context::parse(&ctx, "ℕ ~ <PosInt 16 BigEndian> ~ <Seq~List <Digit 16> ~ Char> ~ EditTree")
+                            });
+
                             *li = 1;
                         }
                     }

lib-nested-core/src/editors/integer/radix.rs

@@ -113,11 +113,15 @@ impl RadixProjection {
 
         if let Some(src) = self.src.as_ref() {
             let mut val = src.get_value();
+            if val == 0 {
+                self.dst_digits.push(0);
+            } else {
                 while val > 0 {
                     self.dst_digits.push(val % self.dst_radix);
                     val /= self.dst_radix;
                 }
             }
+        }
 
         let new_len = self.dst_digits.len();
         for i in 0 .. usize::max(old_len, new_len) {