FEATURE: Add a curr method to the InputIter trait.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "abortable_parser"
-version = "0.2.2"
+version = "0.2.3"
 authors = ["Jeremy Wall <jeremy@marzhillstudios.com>"]
 description = "A parser combinator library with an emphasis on error handling"
 repository = "https://github.com/zaphar/abortable_parser"

src/iter.rs

@@ -83,7 +83,19 @@ impl<'a, T: Debug + 'a> Clone for SliceIter<'a, T> {
     }
 }
 
-impl<'a, T: Debug + 'a> InputIter for SliceIter<'a, T> {}
+impl<'a, T: Debug + 'a> InputIter for SliceIter<'a, T> {
+    fn curr(&self) -> Self::Item {
+        if self.offset >= self.source.len() {
+            self.source.get(self.source.len() - 1).unwrap()
+        } else {
+            if self.offset == 0 {
+                self.source.get(self.offset).unwrap()
+            } else {
+                self.source.get(self.offset - 1).unwrap()
+            }
+        }
+    }
+}
 
 impl<'a, T: Debug + 'a> Span<&'a [T]> for SliceIter<'a, T> {
     fn span(&self, idx: SpanRange) -> &'a [T] {
@@ -189,7 +201,19 @@ impl<'a> Clone for StrIter<'a> {
     }
 }
 
-impl<'a> InputIter for StrIter<'a> {}
+impl<'a> InputIter for StrIter<'a> {
+    fn curr(&self) -> Self::Item {
+        if self.offset >= self.source.len() {
+            self.source.as_bytes().get(self.source.len() - 1).unwrap()
+        } else {
+            if self.offset == 0 {
+                self.source.as_bytes().get(self.offset).unwrap()
+            } else {
+                self.source.as_bytes().get(self.offset - 1).unwrap()
+            }
+        }
+    }
+}
 
 impl<'a> From<&'a str> for StrIter<'a> {
     fn from(source: &'a str) -> Self {

src/lib.rs

@@ -145,7 +145,9 @@ pub trait Peekable<O> {
 }
 
 /// A Cloneable Iterator that can report an offset as a count of processed Items.
-pub trait InputIter: Iterator + Clone + Offsetable {}
+pub trait InputIter: Iterator + Clone + Offsetable {
+    fn curr(&self) -> Self::Item;
+}
 
 /// The custom error type for use in `Result::{Fail, Abort}`.
 /// Stores a wrapped err that must implement Display as well as an offset and

src/test.rs

@@ -30,8 +30,10 @@ fn test_slice_iter() {
             None => break,
             Some(b) => b,
         };
+        assert_eq!(*b as char, *iter.curr() as char);
         out.push(b.clone());
     }
+    assert_eq!(*iter.curr(), 'o' as u8);
     assert_eq!(3, out.len());
     assert_eq!('f' as u8, out[0]);
     assert_eq!('o' as u8, out[1]);