Add slice -> Ruby array

src/coercions/mod.rs

@@ -6,6 +6,7 @@ mod float;
 mod string;
 mod option;
 mod result;
+mod slice;
 mod vec;
 
 use sys::{VALUE};

src/coercions/slice.rs

@@ -0,0 +1,12 @@
+use super::{ToRuby, ToRubyResult};
+use sys::{rb_ary_new_capa, rb_ary_push};
+
+impl<'a, T> ToRuby for &'a [T] where &'a T: ToRuby {
+    fn to_ruby(self) -> ToRubyResult {
+        let ary = unsafe { rb_ary_new_capa(self.len() as isize) };
+        for item in self {
+            unsafe { rb_ary_push(ary, item.to_ruby()?); }
+        }
+        Ok(ary)
+    }
+}

src/coercions/vec.rs

@@ -1,5 +1,4 @@
-use sys;
-use sys::{VALUE};
+use sys::{self, VALUE};
 
 use super::{CheckResult, FromRuby, ToRuby, ToRubyResult};
 use super::super::{inspect};