posint get_value() : ignore invalid digits

examples/tty-02-digit/src/main.rs

@@ -47,7 +47,7 @@ async fn main() {
      *         /   |     \
      *        /    |        \
      *       /     |          \
-     *     u32   EditTree     Char
+     *     u64   EditTree     Char
      *           - Editor         \
      *           - Display        EditTree
      *         /     |    \      - Editor

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

@@ -63,76 +63,66 @@ async fn main() {
 
     /* initially copy values from Vec to EditTree...
      */
-    ctx.read().unwrap().apply_morphism(
+    ctx.read().unwrap().build_repr_tree(
         &rt_int,
-        &nested::repr_tree::morphism::MorphismType {
+        Context::parse(&ctx, "ℕ ~ <PosInt 16 BigEndian> ~ <Seq~List <Digit 16>~Char> ~ <Vec Char>"),
-            src_type: Context::parse(&ctx, "ℕ ~ <PosInt 16 BigEndian> ~ <Seq <Digit 16>> ~ <List <Digit 16> ~ Char> ~ <Vec Char>"),
+        vec![
-            dst_type: Context::parse(&ctx, "ℕ ~ <PosInt 16 BigEndian> ~ <Seq <Digit 16>> ~ <List <Digit 16> ~ Char> ~ EditTree")
+            Context::parse(&ctx, "ℕ ~ <PosInt 16 BigEndian> ~ <Seq~List <Digit 16>> ~ EditTree"),
-        });
+            Context::parse(&ctx, "ℕ ~ <PosInt 16 LittleEndian> ~ <Seq~List <Digit 16>> ~ EditTree"),
+        ]);
 
-    /* set Hex-editor to be master
+    fn set_master(
-     */
+        ctx: &Arc<RwLock<Context>>,
-    rt_int.write().unwrap().detach( &ctx );
+        rt: &Arc<RwLock<ReprTree>>,
-    ctx.read().unwrap().apply_morphism(
+        mut leaves: Vec< laddertypes::TypeTerm >,
-        &rt_int,
+        master_idx: usize
-        &laddertypes::MorphismType {
+    ) {
-            src_type: Context::parse(&ctx, "ℕ ~ <PosInt 16 BigEndian> ~ <Seq <Digit 16>> ~ <List <Digit 16> ~ Char> ~ EditTree"),
+        eprintln!("set master to {}", master_idx);
-            dst_type: Context::parse(&ctx, "ℕ ~ <PosInt 10 BigEndian> ~ <Seq <Digit 10>> ~ <List <Digit 10> ~ Char> ~ EditTree")
+        if master_idx < leaves.len() {
-        }
+            let master = leaves.remove( master_idx );
+            rt.write().unwrap().detach( &ctx );
+            ctx.read().unwrap().build_repr_tree(
+                rt,
+                master,
+                leaves
             );
+        }
+    }
 
-    let edittree_hex_be_list =
+    let editor_types = vec![
-        rt_int
+         Context::parse(&ctx,
-            .descend(Context::parse(&ctx, "
+             "ℕ ~ <PosInt 16 BigEndian> ~ <Seq~List <Digit 16>> ~ EditTree"),
-                    <PosInt 16 BigEndian>
+         Context::parse(&ctx,
-                    ~ <Seq~List <Digit 16>~Char>
+             "ℕ ~ <PosInt 16 LittleEndian> ~ <Seq~List <Digit 16>> ~ EditTree"),
-                ")).unwrap()
+         Context::parse(&ctx,
-            .edittree( &ctx );
+             "ℕ ~ <PosInt 16 BigEndian> ~ EditTree"),
+         Context::parse(&ctx,
+             "ℕ ~ <PosInt 8 BigEndian> ~ EditTree"),
+         Context::parse(&ctx,
+             "ℕ ~ <PosInt 2 BigEndian> ~ EditTree"),
+    ];
 
-    let edittree_dec_be_list =
+    set_master(&ctx, &rt_int, editor_types.clone(), 0);
-        rt_int
-            .descend(Context::parse(&ctx, "
-                    <PosInt 10 BigEndian>
-                    ~ <Seq~List <Digit 10>~Char>
-                ")).unwrap()
-            .edittree( &ctx );
 
-    let hex_digits_view = rt_int.descend(Context::parse(&ctx, "
+    /* list of editors
-              <PosInt 16 LittleEndian>
-            ~ <Seq <Digit 16> >
-            ~ <List <Digit 16>
-                    ~ ℤ_2^64
-                    ~ machine.UInt64 >
-        ")).expect("descend")
-        .view_list::<u64>()
-        .map(|v| TerminalAtom::from(char::from_digit(*v as u32, 16)))
-        .to_sequence()
-        .to_grid_horizontal();
-
-    let dec_digits_view = rt_int.descend(Context::parse(&ctx, "
-              <PosInt 10 LittleEndian>
-            ~ <Seq <Digit 10>>
-            ~ <List <Digit 10>
-                    ~ ℤ_2^64
-                    ~ machine.UInt64 >
-        ")).expect("descend")
-        .view_list::<u64>()
-        .map(|v| TerminalAtom::from(char::from_digit(*v as u32, 10)))
-        .to_sequence()
-        .to_grid_horizontal();
-
-    /* list of both editors
      */
     let mut list_editor = nested::editors::list::ListEditor::new(ctx.clone(), Context::parse(&ctx, "<Seq Char>"));
-    list_editor.data.push( edittree_hex_be_list.get() );
+
-    list_editor.data.push( edittree_dec_be_list.get() );
+    // add all desired editors to the list
+    for leaf in editor_types.iter() {
+        let et =  
+            rt_int
+                .descend(leaf.clone()).unwrap()
+                .edittree(&ctx).get();
+        et.write().unwrap().goto(TreeCursor::none());
+        list_editor.data.push(et);
+    }
+
     let mut edittree = list_editor.into_node(SingletonBuffer::new(0).get_port());
 
     /* cursors are a bit screwed initially so fix them up
      * TODO: how to fix this generally?
      */
-    edittree_hex_be_list.get().write().unwrap().goto(TreeCursor::none());
-    edittree_dec_be_list.get().write().unwrap().goto(TreeCursor::none());
     edittree.goto(TreeCursor{
         leaf_mode: nested::editors::list::ListCursorMode::Insert,
         tree_addr: vec![0,0]
@@ -146,37 +136,23 @@ async fn main() {
          */
         let ctx = ctx.clone();
         let rt_int = rt_int.clone();
-        let last_idx = RwLock::new(1);
+        let last_idx = RwLock::new(0);
+        let editor_types = editor_types.clone();
         move |ev| {
-
             let cur = edittree.read().unwrap().get_cursor();
             if cur.tree_addr.len() > 0 {
-                match cur.tree_addr[0] {
-                    0 => {
                 let mut li = last_idx.write().unwrap();
-                        if *li != 0 {
+                let ci = cur.tree_addr[0];
-                            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;
+                if *li != ci {
-                        }
+                    eprintln!("----------------------------------");
-                    }
+                    set_master(
-                    1 => {
+                        &ctx,
-                        let mut li = last_idx.write().unwrap();
+                        &rt_int,
-                        if *li != 1 {
+                        editor_types.clone(),
-                            rt_int.write().unwrap().detach( &ctx );
+                        ci as usize
-                            ctx.read().unwrap().apply_morphism(&rt_int, &laddertypes::MorphismType {
+                    );
-                                src_type: Context::parse(&ctx, "ℕ ~ <PosInt 10 BigEndian> ~ <Seq~List <Digit 10> ~ Char> ~ EditTree"),
+                    *li = ci;
-                                dst_type: Context::parse(&ctx, "ℕ ~ <PosInt 16 BigEndian> ~ <Seq~List <Digit 16> ~ Char> ~ EditTree")
-                            });
-
-                            *li = 1;
-                        }
-                    }
-                    _=>{}
                 }
             }
 
@@ -199,30 +175,21 @@ async fn main() {
         {
             let rt_edittree = rt.descend(Context::parse(&ctx, "EditTree")).expect("descend");
             let halo_type = rt_edittree.read().unwrap().get_halo_type().clone();
-            let edittree = rt_edittree.read().unwrap().get_view::<dyn r3vi::view::singleton::SingletonView<Item = Arc<RwLock<EditTree>>>>().unwrap().get().read().unwrap().clone();
+            let edittree = rt_edittree.edittree( &ctx );
 
             comp.push(  nested_tty::make_label( &ctx.read().unwrap().type_term_to_str(&halo_type) ) 
                 .map_item(|_pt, atom| atom.add_style_front(TerminalStyle::fg_color((90,90,90))))
                 .offset(Vector2::new(1,y)));
 
-            comp.push(  edittree.display_view()
+            comp.push(  edittree.get().read().unwrap().display_view()
                 .offset(Vector2::new(1,y+1)));
         }
 
-        show_edit_tree(&ctx, &mut comp, &rt_int.descend(Context::parse(&ctx, "<PosInt 16 BigEndian> ~ <Seq~List <Digit 16>~Char>")).expect(""), 1);
+        let mut y = 1;
-        show_edit_tree(&ctx, &mut comp, &rt_int.descend(Context::parse(&ctx, "<PosInt 10 BigEndian> ~ <Seq~List <Digit 10>~Char>")).expect(""), 4);
+        for t in editor_types.iter() {
-
+            show_edit_tree(&ctx, &mut comp, &rt_int.descend(t.clone()).expect(""), y);
-        /* project the seq of u64 representations to a view
+            y += 3;
-         */
+        }
-        comp.push(nested_tty::make_label("dec: ").offset(Vector2::new(3,7)));
-        comp.push(dec_digits_view.offset(Vector2::new(8,7)).map_item(|_,a| {
-            a.add_style_back(TerminalStyle::fg_color((30,90,200)))
-        }));
-
-        comp.push(nested_tty::make_label("hex: ").offset(Vector2::new(3,8)));
-        comp.push(hex_digits_view.offset(Vector2::new(8,8)).map_item(|_,a| {
-            a.add_style_back(TerminalStyle::fg_color((200, 200, 30)))
-        }));
     }
 
     /* write the changes in the view of `term_port` to the terminal

lib-nested-core/src/editors/char/mod.rs

@@ -25,7 +25,6 @@ pub fn init_ctx( ctx: Arc<RwLock<Context>> ) {
         {
             let ctx = ctx.clone();
             move |rt, σ| {
-                
                 {
                     let mut b = rt.write().unwrap().singleton_buffer::<char>();
                     if let Some(buf) = b {
@@ -34,15 +33,12 @@ pub fn init_ctx( ctx: Arc<RwLock<Context>> ) {
                         // create char buffer
                         rt.write().unwrap().insert_leaf(
                             vec![].into_iter(),
-                                ReprLeaf::from_singleton_buffer(
+                            ReprLeaf::from_singleton_buffer(SingletonBuffer::new('\0'))
-                                    SingletonBuffer::new('\0')
-                                )
                         );
                     }
                 }
             
                 let char_buf = rt.singleton_buffer::<char>();
-
                 let mut edittree = CharEditor::new_edit_tree(
                     ctx.clone(),
                     char_buf,
@@ -58,16 +54,34 @@ pub fn init_ctx( ctx: Arc<RwLock<Context>> ) {
                         )
                 );
 
-                    ctx.read().unwrap().setup_edittree(
+                ctx.read().unwrap().setup_edittree(rt);
-                        rt.clone(),
-                        SingletonBuffer::new(0).get_port()
-                    );
             }
-            
         }
     );
 
+    let char_morph_from_edittree = GenericReprTreeMorphism::new(
+        Context::parse(&ctx, "Char~EditTree"),
+        Context::parse(&ctx, "Char"),
+        {
+            let ctx = ctx.clone();
+            move |rt, σ|
+            {
+                let mut b = rt
+                   .descend(Context::parse(&ctx, "EditTree")).unwrap()
+                   .view_singleton::<Arc<RwLock<EditTree>>>();
+
+                rt.attach_leaf_to(
+                    Context::parse(&ctx, "Char"),
+                    b.map(|x|
+                        x.read().unwrap()
+                            .get_edit::<CharEditor>().unwrap()
+                            .read().unwrap()
+                            .get())
+                );
+            }
+        });
     ctx.write().unwrap().morphisms.add_morphism( char_morph_to_edittree );
+    ctx.write().unwrap().morphisms.add_morphism( char_morph_from_edittree );
 }
 
 pub struct CharEditor {

lib-nested-core/src/editors/digit/ctx.rs

@@ -19,6 +19,43 @@ pub fn init_ctx( ctx: Arc<RwLock<Context>> ) {
     // todo: proper scoping of Radix variable
     ctx.write().unwrap().add_varname("Radix");
 
+    let digit_make_edittree = GenericReprTreeMorphism::new(
+        Context::parse(&ctx, "<Digit Radix>"),
+        Context::parse(&ctx, "<Digit Radix>~EditTree"),
+        {
+                let ctx = ctx.clone();
+                move |src_rt, σ| {
+                    let radix =
+                        match σ.get( &laddertypes::TypeID::Var(ctx.read().unwrap().get_var_typeid("Radix").unwrap()) ) {
+                            Some(TypeTerm::Num(n)) => *n as u32,
+                            _ => 0
+                        };
+
+                    let char_buf = SingletonBuffer::<char>::new('?');
+
+                    /* Create EditTree object
+                     */
+                    let mut edittree = DigitEditor::new(
+                        ctx.clone(),
+                        radix,
+                        char_buf
+                    ).into_node(
+                        r3vi::buffer::singleton::SingletonBuffer::<usize>::new(0).get_port()
+                    );
+
+                    src_rt.write().unwrap()
+                        .insert_branch(
+                            ReprTree::from_singleton_buffer(
+                                Context::parse(&ctx, "EditTree"),
+                                SingletonBuffer::new(Arc::new(RwLock::new(edittree)))
+                            )
+                        );
+
+                    ctx.read().unwrap().setup_edittree( src_rt );
+                }
+        }
+    );
+
     let digit_morph_char_to_edittree = GenericReprTreeMorphism::new(
         Context::parse(&ctx, "<Digit Radix>~Char"),
         Context::parse(&ctx, "<Digit Radix>~EditTree"),
@@ -57,6 +94,30 @@ pub fn init_ctx( ctx: Arc<RwLock<Context>> ) {
         }
     );
 
+    let digit_morph_char_from_edittree = GenericReprTreeMorphism::new(
+        Context::parse(&ctx, "<Digit Radix>~EditTree"),
+        Context::parse(&ctx, "<Digit Radix>~Char"),
+
+        {
+            let ctx = ctx.clone();
+            move |src_rt, σ| {
+                let edittree = src_rt.edittree( &ctx );
+                let port =
+                        edittree
+                            .get()
+                            .read().unwrap()
+                            .get_edit::<DigitEditor>().unwrap()
+                            .read().unwrap()
+                            .get_char_port();
+
+                    src_rt.insert_leaf(
+                        Context::parse(&ctx, "Char"),
+                        ReprLeaf::from_view( port )
+                    )
+            }
+        }
+    );
+
     let digit_morph_char_to_u64 = GenericReprTreeMorphism::new(
         Context::parse(&ctx, "<Digit Radix>~Char"),
         Context::parse(&ctx, "<Digit Radix>~ℤ_2^64~machine.UInt64"),
@@ -134,7 +195,9 @@ pub fn init_ctx( ctx: Arc<RwLock<Context>> ) {
     );
 
 
+    ctx.write().unwrap().morphisms.add_morphism( digit_make_edittree );
     ctx.write().unwrap().morphisms.add_morphism( digit_morph_char_to_edittree );
+    ctx.write().unwrap().morphisms.add_morphism( digit_morph_char_from_edittree );
     ctx.write().unwrap().morphisms.add_morphism( digit_morph_char_to_u64 );
     ctx.write().unwrap().morphisms.add_morphism( digit_morph_u64_to_char );
 }

lib-nested-core/src/editors/digit/editor.rs

@@ -59,6 +59,10 @@ impl DigitEditor {
         */
     }
 
+    pub fn get_char_port(&self) -> OuterViewPort<dyn SingletonView<Item = char>> {
+        self.data.get_port()
+    }
+
     pub fn get_data_port(&self) -> OuterViewPort<dyn SingletonView<Item = Result<u32, char>>> {
         let radix = self.radix;
         self.data.get_port().map(move |c|

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

@@ -1,7 +1,8 @@
 
 use {
     r3vi::{
-        view::{OuterViewPort, singleton::*, list::*}
+        view::{OuterViewPort, singleton::*, list::*},
+        buffer::singleton::SingletonBuffer
     },
     laddertypes::{TypeTerm, MorphismType},
     crate::{
@@ -170,9 +171,132 @@ pub fn init_ctx(ctx: Arc<RwLock<Context>>) {
         }
     );
 
+    let posint_list_morph_from_u64 = GenericReprTreeMorphism::new(
+        Context::parse(&ctx, "ℕ ~ machine.UInt64"),
+        Context::parse(&ctx, "ℕ ~ <PosInt 0 LittleEndian> ~ <Seq~List <Digit 0>~ℤ_2^64~machine.UInt64>"),
+        {
+            let ctx = ctx.clone();
+            move |rt, σ| {
+                let digits = rt
+                    .descend(Context::parse(&ctx, "ℕ ~ machine.UInt64")).unwrap()
+                    .view_u64()
+                    .to_sequence()
+                    .to_list();
+
+                rt.attach_leaf_to(
+                    Context::parse(&ctx, "ℕ ~ <PosInt 0 LittleEndian> ~ <Seq~List <Digit 0>~ℤ_2^64~machine.UInt64>"),
+                    digits
+                );
+            }
+        }
+    );
+    let posint_list_morph_to_u64 = GenericReprTreeMorphism::new(
+        Context::parse(&ctx, "ℕ ~ <PosInt 0 LittleEndian> ~ <Seq~List <Digit 0>~ℤ_2^64~machine.UInt64> ~ <Vec machine.UInt64>"),
+        Context::parse(&ctx, "ℕ ~ machine.UInt64"),
+        {
+            let ctx = ctx.clone();
+            move |rt, σ| {
+                let u64_view = rt
+                    .descend(Context::parse(&ctx, "ℕ ~ <PosInt 0 LittleEndian> ~ <Seq~List <Digit 0>~ℤ_2^64~machine.UInt64> ~ <Vec machine.UInt64>")).unwrap()
+                    .get_port::< RwLock<Vec< u64 >> >().unwrap()
+                    .to_singleton()
+                    .map(|digits| {
+                        digits.get(0).cloned().unwrap_or(0)
+                    });
+
+                rt.attach_leaf_to(
+                    Context::parse(&ctx, "ℕ ~ machine.UInt64"),
+                    u64_view
+                );
+            }
+        }
+    );
+
+    let posint_make_edittree = GenericReprTreeMorphism::new(
+        Context::parse(&ctx, "ℕ ~ <PosInt Radix BigEndian> ~ <Seq~List <Digit Radix>> ~ EditTree"),
+        Context::parse(&ctx, "ℕ ~ <PosInt Radix BigEndian> ~ EditTree"),
+        {
+            let ctx = ctx.clone();
+            move |src_rt, σ| {
+                let mut list_edittree = src_rt.descend(
+                    Context::parse(&ctx, "ℕ ~ <PosInt Radix BigEndian> ~ <Seq~List <Digit Radix>>")
+                        .apply_substitution(&|x| σ.get(x).cloned()).clone()
+                    )
+                    .unwrap()
+                    .edittree( &ctx )
+                    .get().clone()
+                    .read().unwrap()
+                    .clone();
+
+                // clear display
+                list_edittree.disp.view = ReprTree::new_arc(Context::parse(&ctx, "Display"));
+
+                src_rt.insert_leaf(
+                    Context::parse(&ctx, "<PosInt Radix BigEndian> ~ EditTree")
+                           .apply_substitution(&|x| σ.get(x).cloned()).clone(),
+                    ReprLeaf::from_singleton_buffer(
+                        SingletonBuffer::new(
+                            Arc::new(RwLock::new(list_edittree))
+                        )
+                    )
+                );
+
+                ctx.read().unwrap().setup_edittree(
+                    &src_rt.descend(
+                        Context::parse(&ctx, "<PosInt Radix BigEndian>")
+                            .apply_substitution(&|x| σ.get(x).cloned()).clone()
+                    ).unwrap()
+                );
+            }
+        }
+    );
+
+    let posint_edittree_to_list = GenericReprTreeMorphism::new(
+        Context::parse(&ctx, "ℕ ~ <PosInt Radix BigEndian> ~ EditTree"),
+        Context::parse(&ctx, "ℕ ~ <PosInt Radix BigEndian> ~ <Seq~List <Digit Radix>> ~ EditTree"),
+        {
+            let ctx = ctx.clone();
+            move |src_rt, σ| {
+                let mut list_edittree = src_rt.descend(
+                    Context::parse(&ctx, "ℕ ~ <PosInt Radix BigEndian>")
+                        .apply_substitution(&|x| σ.get(x).cloned()).clone())
+                    .unwrap()
+                    .edittree( &ctx )
+                    .get().clone()
+                    .read().unwrap()
+                    .clone();
+
+                // clear display
+                list_edittree.disp.view = ReprTree::new_arc(Context::parse(&ctx, "Display"));
+
+                src_rt.insert_leaf(
+                    Context::parse(&ctx, "<PosInt Radix BigEndian> ~ <Seq~List <Digit Radix>>~EditTree")
+                           .apply_substitution(&|x| σ.get(x).cloned()).clone(),
+                    ReprLeaf::from_singleton_buffer(
+                        SingletonBuffer::new(
+                            Arc::new(RwLock::new(list_edittree))
+                        )
+                    )
+                );
+
+                ctx.read().unwrap().setup_edittree(
+                    &src_rt.descend(
+                        Context::parse(&ctx, "<PosInt Radix BigEndian> ~ <Seq~List <Digit Radix>>")
+                            .apply_substitution(&|x| σ.get(x).cloned()).clone()
+                    ).unwrap()
+                );
+            }
+        }
+    );
+
+    ctx.write().unwrap().morphisms.add_morphism( posint_make_edittree );
+    ctx.write().unwrap().morphisms.add_morphism( posint_edittree_to_list );
+
     ctx.write().unwrap().morphisms.add_morphism( posint_seq_morph_big_to_little );
     ctx.write().unwrap().morphisms.add_morphism( posint_list_morph_big_to_little );
     ctx.write().unwrap().morphisms.add_morphism( posint_list_morph_little_to_big );    
     ctx.write().unwrap().morphisms.add_morphism( posint_list_morph_radix );
+    ctx.write().unwrap().morphisms.add_morphism( posint_list_morph_from_u64 );
+    ctx.write().unwrap().morphisms.add_morphism( posint_list_morph_to_u64 );
 }
 

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

@@ -35,9 +35,11 @@ pub trait PositionalUInt : SequenceView<Item = u64> {
         let mut val = 0;
         let mut r = 1;
         for i in 0..self.len().unwrap_or(0) {
-            val += r * self.get(&i).unwrap();
+            if let Some(digit_val) = self.get(&i) {
+                val += r * digit_val;
                 r *= self.get_radix();
             }
+        }
 
         val  
     }

lib-nested-core/src/editors/list/ctx.rs

@@ -63,36 +63,24 @@ pub fn init_ctx(ctx: Arc<RwLock<Context>>) {
         }
     );
 
-
+    let list_morph_editsetup3 = GenericReprTreeMorphism::new(
-    let list_morph_editsetup2 = GenericReprTreeMorphism::new(
+        Context::parse(&ctx, "<List Item> ~ EditTree"),
-        Context::parse(&ctx, "<List Char>~EditTree"),
+        Context::parse(&ctx, "<List Item> ~ <List EditTree>"),
-        Context::parse(&ctx, "<List Char>"),
         {
             let ctx = ctx.clone();
             move |src_rt, σ| {
-                let edittree =
+                let edittree = src_rt.edittree( &ctx );
-                    src_rt
-                        .descend(Context::parse(&ctx, "<List Char>~EditTree")).unwrap()
-                        .singleton_buffer::<Arc<RwLock<EditTree>>>();
-
                 let list_edit = edittree.get().read().unwrap().get_edit::< ListEditor >().unwrap();
                 let edittree_items = list_edit.read().unwrap().data.get_port().to_list();
 
-                src_rt.insert_leaf(
+                eprintln!("edittree_items.len() = {:?}", edittree_items.get_view().unwrap().len());
-                    Context::parse(&ctx, "<List Char>"),
+
-                    ReprLeaf::from_view(
+                src_rt.attach_leaf_to(
+                    Context::parse(&ctx, "<List Item> ~ <List EditTree>")
+                        .apply_substitution(&|x| σ.get(x).cloned()).clone(),
                     edittree_items
-                        .map(|edittree_char|
-                            edittree_char
-                                .read().unwrap()
-                                .get_edit::<CharEditor>().unwrap()
-                                .read().unwrap()
-                                .get()
-                        )
-                    )
                 );
             }
-            
         }
     );
 
@@ -132,21 +120,14 @@ pub fn init_ctx(ctx: Arc<RwLock<Context>>) {
         {
             let ctx = ctx.clone();
             move |src_rt, σ| {
-                let p = 
+                let list_port = src_rt.get_port::<dyn ListView< Arc<RwLock<EditTree>> >>().unwrap();
-                    src_rt
+                src_rt.attach_leaf_to( Context::parse(&ctx, "<Vec EditTree>"), list_port );
-                        .descend(Context::parse(&ctx, "<List EditTree>")).expect("descend")
-                        .get_port::<dyn ListView< Arc<RwLock<EditTree>> >>().unwrap();
-
-                src_rt.attach_leaf_to(
-                    Context::parse(&ctx, "<List EditTree> ~ <Vec EditTree>"),
-                    p
-                );
             }
         }
     );
 
     ctx.write().unwrap().morphisms.add_morphism( list_morph_editsetup1 );
-    ctx.write().unwrap().morphisms.add_morphism( list_morph_editsetup2 );
+    ctx.write().unwrap().morphisms.add_morphism( list_morph_editsetup3 );
     ctx.write().unwrap().morphisms.add_morphism( list_morph_from_vec_char );
     ctx.write().unwrap().morphisms.add_morphism( list_morph_to_vec_char );
     ctx.write().unwrap().morphisms.add_morphism( list_morph_to_vec_edittree );

lib-nested-core/src/editors/list/editor.rs

@@ -1,7 +1,8 @@
 use {
     r3vi::{
         view::{OuterViewPort, singleton::*, sequence::*},
-        buffer::{singleton::*, vec::*}
+        buffer::{singleton::*, vec::*},
+        projection::*
     },
     laddertypes::{TypeTerm},
     crate::{
@@ -123,23 +124,18 @@ impl ListEditor {
             .set_editor(editor.clone())
             .set_nav(editor.clone())
             .set_cmd(editor.clone())
-            .set_diag(e
+            .set_diag(e.get_data_port()
-                      .get_data_port()
                       .enumerate()
                       .map(|(idx, item_editor)| {
                           let idx = *idx;
-                              item_editor
+                          item_editor.get_msg_port()
-                                  .get_msg_port()
+                              .map(move |msg| {
-                                  .map(
-                                      move |msg| {
                                   let mut msg = msg.clone();
                                   msg.addr.insert(0, idx);
                                   msg
-                                      }
-                                  )
                               })
-                      .flatten()
+                          })
-            );
+                      .flatten());
 
         node.ctrl.spillbuf = e.spillbuf.clone();
         node
@@ -161,9 +157,9 @@ impl ListEditor {
     }
 
     pub fn get_data_port(&self) -> OuterViewPort<dyn SequenceView<Item = EditTree>> {
-        self.data.get_port().to_sequence().map(
+        self.data.get_port().to_list().map(
             |x| x.read().unwrap().clone()
-        )
+        ).to_sequence()
     }
 /*
     pub fn get_data(&self) -> Arc<RwLock<ReprTree>> {
@@ -319,11 +315,7 @@ impl ListEditor {
                 let mut b = item.ctrl.spillbuf.write().unwrap();
 
                 let rt = ReprTree::new_arc(self.typ.clone());
-                let mut et = self.ctx.read().unwrap()
+                let mut et = self.ctx.read().unwrap().setup_edittree(&rt);
-                    .setup_edittree(
-                        &rt
-//                      ,  self.depth.map(|d| d+1)
-                    );
 
                 if let Some(edittree) = et.as_mut(){
 

lib-nested-core/src/editors/list/segment.rs

@@ -42,11 +42,12 @@ impl SequenceView for ListSegmentSequence {
     type Item = ListSegment;
 
     fn len(&self) -> Option<usize> {
+        let l = self.data.len()?;
         match self.cur_cursor.mode {
             ListCursorMode::Insert => {
-                Some(self.data.len()? + if self.cur_cursor.idx.is_some() { 1 } else { 0 })
+                Some(l + if self.cur_cursor.idx.is_some() { 1 } else { 0 })
             }
-            _ => self.data.len(),
+            _ => Some(l),
         }
     }
 

lib-nested-core/src/repr_tree/context.rs

@@ -120,6 +120,32 @@ impl Context {
         }    
     }
 
+    pub fn build_repr_tree(
+        &self,
+        rt: &Arc<RwLock<ReprTree>>,
+        root: TypeTerm,
+        leaves: Vec< TypeTerm >
+    ) {
+        let mut st_problem = laddertypes::steiner_tree::PathApproxSteinerTreeSolver::new(
+            root,
+            leaves
+        );
+
+        if let Some( steiner_tree ) = st_problem.solve( &self.morphisms ) {
+            for morphism_type in steiner_tree.into_edges() {
+                eprintln!("--> apply morph to {}", self.type_term_to_str(&morphism_type.dst_type));
+                if let Some(( morphism, mut τ, σ )) =
+                    self.morphisms.find_morphism_with_subtyping( &morphism_type )
+                {
+                    let mut rt = rt.descend( τ ).expect("descend src repr");
+                    (morphism.setup_projection)( &mut rt, &σ );
+                }
+            }
+        } else {
+            eprintln!("could not find steiner tree to build the requested repr tree");
+        }
+    }
+
     pub fn make_repr(ctx: &Arc<RwLock<Self>>, t: &TypeTerm) -> Arc<RwLock<ReprTree>> {
         let rt = Arc::new(RwLock::new(ReprTree::new( TypeTerm::unit() )));
         ctx.read().unwrap().apply_morphism( &rt, &MorphismType{ src_type: TypeTerm::unit(), dst_type: t.clone() } );
@@ -223,7 +249,6 @@ impl Context {
     pub fn setup_edittree(
         &self,
         rt: &Arc<RwLock<ReprTree>>
-//        depth: OuterViewPort<dyn SingletonView<Item = usize>>
     ) -> Option<SingletonBuffer<Arc<RwLock<EditTree>>>> {
         if let Some(new_edittree) =
             rt.descend(self.type_term_from_str("EditTree").unwrap())

lib-nested-core/src/repr_tree/node.rs

@@ -19,7 +19,7 @@ use {
         sync::{Arc, RwLock},
         any::Any
     },
-    super::{Context, ReprLeaf, ReprTreeExt, context::{TYPEID_vec, TYPEID_char, TYPEID_u64, TYPEID_edittree}}
+    super::{Context, ReprLeaf, ReprTreeExt, context::{TYPEID_list, TYPEID_vec, TYPEID_char, TYPEID_u64, TYPEID_edittree}}
 };
 
 //<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
@@ -285,8 +285,26 @@ impl ReprTree {
             ]) {
                 leaf.detach_vec::< u64 >();
             }
+            else if self.type_tag == TypeTerm::App(vec![
+                TypeTerm::TypeID(TYPEID_list),
+                TypeTerm::TypeID(TYPEID_edittree),
+            ]) {
+                leaf.detach::< dyn ListView<Arc<RwLock<crate::edit_tree::EditTree>>> >();
+            }
+            else if self.type_tag == TypeTerm::App(vec![
+                TypeTerm::TypeID(TYPEID_list),
+                TypeTerm::TypeID(TYPEID_char),
+            ]) {
+                leaf.detach::< dyn ListView<char> >();
+            }
+            else if self.type_tag == TypeTerm::App(vec![
+                TypeTerm::TypeID(TYPEID_list),
+                TypeTerm::TypeID(TYPEID_u64),
+            ]) {
+                leaf.detach::< dyn ListView<u64> >();
+            }
             else {
-                eprintln!("cant detach type");
+                eprintln!("cant detach type {}", ctx.read().unwrap().type_term_to_str(&self.type_tag));
             }
         }
 

lib-nested-tty/src/editors/list.rs

@@ -224,22 +224,24 @@ impl PTYListController {
             ListCursorMode::Insert => {
                 let rt = ReprTree::new_arc(e.typ.clone());
 
-                let ladder = laddertypes::TypeTerm::Ladder(vec![
+                let src_ladder = laddertypes::TypeTerm::Ladder(vec![
+                    rt.read().unwrap().get_type().clone()
+                ]);
+                let dst_ladder = laddertypes::TypeTerm::Ladder(vec![
                     rt.read().unwrap().get_type().clone(),
                     ctx.type_term_from_str("EditTree").expect("")
                 ]);
                 ctx.apply_morphism(
                     &rt,
                     &laddertypes::MorphismType {
-                        src_type: rt.get_type(),
+                        src_type: src_ladder,
-                        dst_type: ladder
+                        dst_type: dst_ladder
                     }
                 );
 
                 let new_edittree = ctx.setup_edittree( &rt );
 
                 if let Some(new_edittree) = new_edittree {
-
                     let mut ne = new_edittree.get();
                     let mut ne = ne.write().unwrap();
                     match ne.send_cmd_obj(cmd_obj.clone()) {
@@ -252,9 +254,7 @@ impl PTYListController {
                             TreeNavResult::Exit
                         }
                     }
-
                 } else {
-
                     panic!("cant get edit tree");
                     TreeNavResult::Continue
                 }
@@ -301,7 +301,7 @@ impl ObjCommander for PTYListController {
         let cmd_type = cmd_obj.read().unwrap().get_type().clone();
 
         if cmd_type == Context::parse(&e.ctx, "ListCmd").into()
-        || cmd_type == Context::parse(&e.ctx, "NestedNode").into()
+        || cmd_type == Context::parse(&e.ctx, "EditTree").into()
         {
             e.send_cmd_obj( cmd_obj )
         }

lib-nested-tty/src/lib.rs

@@ -121,7 +121,10 @@ pub fn setup_edittree_hook(ctx: &Arc<RwLock<Context>>) {
     let char_type = Context::parse(&ctx, "Char");
     let digit_type = Context::parse(&ctx, "<Digit Radix>");
     let list_type = Context::parse(&ctx, "<List Item>");
-    let posint_type = Context::parse(&ctx, "<PosInt Radix>");
+    let posint_bin_type = Context::parse(&ctx, "<PosInt 2 BigEndian>");
+    let posint_oct_type = Context::parse(&ctx, "<PosInt 8 BigEndian>");
+    let posint_dec_type = Context::parse(&ctx, "<PosInt 10 BigEndian>");
+    let posint_hex_type = Context::parse(&ctx, "<PosInt 16 BigEndian>");
     let item_tyid = ctx.read().unwrap().get_var_typeid("Item").unwrap();
 
     ctx.write().unwrap().meta_chars.push(',');
@@ -134,18 +137,28 @@ pub fn setup_edittree_hook(ctx: &Arc<RwLock<Context>>) {
     ctx.write().unwrap().set_edittree_hook(
         Arc::new(
             move |et: &mut nested::edit_tree::EditTree, t: laddertypes::TypeTerm| {
-//                let mut et = et.write().unwrap();
-
                 if let Ok(σ) = laddertypes::unify(&t, &char_type.clone()) {
                     *et = crate::editors::edittree_make_char_view(et.clone());
                 }
                 else if let Ok(σ) = laddertypes::unify(&t, &digit_type) {
                     *et = crate::editors::edittree_make_digit_view(et.clone());
                 }
-                else if let Ok(σ) = laddertypes::unify(&t, &posint_type) {
+                else if let Ok(σ) = laddertypes::unify(&t, &posint_bin_type) {
+                    crate::editors::list::PTYListStyle::for_node( &mut *et, ("0b", "", ""));
+                    crate::editors::list::PTYListController::for_node( &mut *et, None, None );
+                }                
+                else if let Ok(σ) = laddertypes::unify(&t, &posint_oct_type) {
+                    crate::editors::list::PTYListStyle::for_node( &mut *et, ("0o", "", ""));
+                    crate::editors::list::PTYListController::for_node( &mut *et, None, None );
+                }
+                else if let Ok(σ) = laddertypes::unify(&t, &posint_dec_type) {
                     crate::editors::list::PTYListStyle::for_node( &mut *et, ("0d", "", ""));
                     crate::editors::list::PTYListController::for_node( &mut *et, None, None );
                 }
+                else if let Ok(σ) = laddertypes::unify(&t, &posint_hex_type) {
+                    crate::editors::list::PTYListStyle::for_node( &mut *et, ("0x", "", ""));
+                    crate::editors::list::PTYListController::for_node( &mut *et, None, None );
+                }
                 else if let Ok(σ) = laddertypes::unify(&t, &list_type) {
                     let item_type = σ.get( &laddertypes::TypeID::Var(item_tyid) ).unwrap();