feat(corebind): add EntryPicker trait for binding entry types to Picker

BREAKING CHANGE: prelude now exports EntryPicker in place of IntoPicker
when mingling_support feature is enabled

1 files changed, 67 insertions, 0 deletions

diff --git a/mingling_picker/src/corebind/entry_picker.rs b/mingling_picker/src/corebind/entry_picker.rs
new file mode 100644
index 0000000..f96ba66
--- /dev/null
+++ b/mingling_picker/src/corebind/entry_picker.rs
@@ -0,0 +1,67 @@
+use std::marker::PhantomData;
+
+use mingling_core::{ChainProcess, Groupped, ProgramCollect};
+
+use crate::{Pickable, Picker, PickerArg, PickerArgResult, PickerArgs, PickerPattern1};
+
+/// Trait for converting Mingling entry types (types that implement `Groupped<R>` and `Into<Vec<String>>`)
+/// into [`Picker`] instances for a given route type `R`.
+///
+/// This trait provides a bridge between entry definitions created with the `mingling` framework
+/// and the picker argument system used for CLI argument parsing and routing.
+///
+/// # Type Parameters
+///
+/// * `'a` — The lifetime of the picker and its references to argument definitions.
+/// * `This` — The program type used for dispatching runtime routes; must implement [`ProgramCollect`].
+/// * `Route` — The route type used for dispatching; must implement [`Groupped<This>`].
+pub trait EntryPicker<'a, This> {
+    /// Converts `self` into a [`Picker`] for the given route type `Route`.
+    fn to_picker(self) -> Picker<'a, ChainProcess<This>>;
+
+    /// Starts building a picker pattern with the first argument.
+    ///
+    /// Returns a [`PickerPattern1`] that can be further chained with additional
+    /// arguments, defaults, routes, and post-processing.
+    ///
+    /// # Type Parameters
+    ///
+    /// * `Next` — The nominal type of the first argument; must implement [`Pickable`].
+    ///
+    /// # Parameters
+    ///
+    /// * `arg` — The argument definition, typically obtained from [`crate::arg`].
+    fn pick<Next>(
+        self,
+        arg: impl Into<&'a PickerArg<'a, Next>>,
+    ) -> PickerPattern1<'a, Next, ChainProcess<This>>
+    where
+        Self: Sized,
+        Next: Pickable<'a> + Default + Sized,
+    {
+        let picker = Self::to_picker(self);
+        PickerPattern1 {
+            args: picker.args,
+            arg_1: arg.into(),
+            result_1: PickerArgResult::Unparsed,
+            default_1: None,
+            route_1: None,
+            post_1: None,
+            error_route: None,
+        }
+    }
+}
+
+impl<'a, This, Bind> EntryPicker<'a, This> for Bind
+where
+    This: ProgramCollect<Enum = This>,
+    Bind: Groupped<This> + Into<Vec<String>>,
+{
+    fn to_picker(self) -> Picker<'a, ChainProcess<This>> {
+        let args = self.into();
+        Picker {
+            route_phantom: PhantomData,
+            args: PickerArgs::Owned(args),
+        }
+    }
+}