feat(picker): add `mingling_support` feature and `is_flag` field

Rename the `core` feature to `mingling_support` in `mingling_picker` and
propagate it through `mingling_picker_macros`.  Add the `is_flag` field
to `PickerTag` to indicate participation in parsing after a `--`
separator.  Remove empty `seek.rs` file.

3 files changed, 20 insertions, 3 deletions

diff --git a/mingling_picker/src/lib.rs b/mingling_picker/src/lib.rs
index fa45d71..d2885d9 100644
--- a/mingling_picker/src/lib.rs
+++ b/mingling_picker/src/lib.rs
@@ -23,8 +23,8 @@ pub mod macros {
     pub use mingling_picker_macros::*;
 }
 
-#[cfg(feature = "core")]
+#[cfg(feature = "mingling_support")]
 mod corebind;
 
-#[cfg(feature = "core")]
+#[cfg(feature = "mingling_support")]
 pub use corebind::*;
diff --git a/mingling_picker/src/parselib/seek.rs b/mingling_picker/src/parselib/seek.rs
deleted file mode 100644
index 8b13789..0000000
--- a/mingling_picker/src/parselib/seek.rs
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/mingling_picker/src/tag.rs b/mingling_picker/src/tag.rs
index 6f91630..a64cf6e 100644
--- a/mingling_picker/src/tag.rs
+++ b/mingling_picker/src/tag.rs
@@ -13,6 +13,7 @@ use crate::{Pickable, PickerFlag};
 /// * `positional` - Whether this tag is a positional argument (no `-` or `--` prefix).
 /// * `optional` - Whether this tag is optional or required.
 /// * `multi` - Whether this tag can accept multiple values.
+/// * `is_flag` - Whether this tag participates in parsing after a `--` separator.
 pub struct PickerTag<'a> {
     /// The short form of the tag, e.g. `'n'` for `-n`.
     pub short: Option<char>,
@@ -26,6 +27,8 @@ pub struct PickerTag<'a> {
     pub optional: bool,
     /// Whether this tag can accept multiple values.
     pub multi: bool,
+    /// Whether this tag participates in parsing after a `--` separator.
+    pub is_flag: bool,
 }
 
 impl<'a, T> From<PickerFlag<'a, T>> for PickerTag<'a>
@@ -53,6 +56,7 @@ where
             positional: value.positional,
             optional: false,
             multi: false,
+            is_flag: false,
         }
     }
 }
@@ -79,6 +83,7 @@ impl<'a, T: Pickable<'a> + Default> From<&'a PickerFlag<'a, T>> for PickerTag<'a
             positional: value.positional,
             optional: false,
             multi: false,
+            is_flag: false,
         }
     }
 }
@@ -93,6 +98,7 @@ impl<'a> PickerTag<'a> {
             positional: false,
             optional: false,
             multi: false,
+            is_flag: false,
         }
     }
 
@@ -132,6 +138,12 @@ impl<'a> PickerTag<'a> {
         self
     }
 
+    /// Mark the tag as a flag that participates in parsing after `--`.
+    pub fn with_is_flag(mut self, is_flag: bool) -> Self {
+        self.is_flag = is_flag;
+        self
+    }
+
     /// Set the short flag (e.g., `'n'` for `-n`).
     pub fn set_short(&mut self, short: char) -> &mut Self {
         self.short = Some(short);
@@ -167,6 +179,12 @@ impl<'a> PickerTag<'a> {
         self.multi = multi;
         self
     }
+
+    /// Set whether this tag participates in parsing after a `--` separator.
+    pub fn set_is_flag(&mut self, is_flag: bool) -> &mut Self {
+        self.is_flag = is_flag;
+        self
+    }
 }
 
 impl<'a> Default for PickerTag<'a> {