feat: add pick_or, pick_or_default, and pick_or_route shorthands

Remove the `Default` bound from `pick()` and `EntryPicker::pick()`,
allowing non-Default types to be used as arguments.

Add `IntoPicker::pick_or`, `pick_or_default`, and `pick_or_route`
convenience methods for common fallback patterns.

Fix token splitting in `arg!` macro to correctly handle angle brackets.

1 files changed, 3 insertions, 3 deletions

diff --git a/mingling/src/picker/entry_picker.rs b/mingling/src/picker/entry_picker.rs
index 7364c50..d9fb37c 100644
--- a/mingling/src/picker/entry_picker.rs
+++ b/mingling/src/picker/entry_picker.rs
@@ -35,7 +35,7 @@ pub trait EntryPicker<'a, This> {
     ) -> PickerPattern1<'a, Next, ChainProcess<This>>
     where
         Self: Sized,
-        Next: Pickable<'a> + Default + Sized,
+        Next: Pickable<'a> + Sized,
     {
         let picker = Self::to_picker(self);
         Picker::build_pattern1(picker.into_args(), arg.into(), None)
@@ -60,7 +60,7 @@ pub trait EntryPicker<'a, This> {
     ) -> PickerPattern1<'a, Next, ChainProcess<This>>
     where
         Self: Sized,
-        Next: Pickable<'a> + Default + Sized,
+        Next: Pickable<'a> + Sized,
         F: FnMut() -> Next + 'static,
     {
         self.pick(arg).or(func)
@@ -107,7 +107,7 @@ pub trait EntryPicker<'a, This> {
     ) -> PickerPattern1<'a, Next, ChainProcess<This>>
     where
         Self: Sized,
-        Next: Pickable<'a> + Default + Sized,
+        Next: Pickable<'a> + Sized,
         F: FnMut() -> ChainProcess<This> + 'static,
     {
         self.pick(arg).or_route(func)