1 files changed, 21 insertions, 0 deletions
diff --git a/src/sexp/step.rs b/src/sexp/step.rs
index 0989ee3..765e33c 100644
--- a/src/sexp/step.rs
+++ b/src/sexp/step.rs
@@ -83,6 +83,27 @@ impl SExp {
     /// }
     ///
     /// ```
+    ///
+    /// **Quotes**
+    /// If an s-expression should not be evaluated
+    /// as a function, but it is instead to be treated
+    /// as a list, `quote` can be used.
+    /// With it as the operator, the rest of the list
+    /// is evaluated to values, but they are not passed
+    /// to the operator after that.
+    /// ```rust
+    /// use melisp::sexp::{SExp::*, SLeaf::*, util::*};
+    /// assert_eq!(
+    ///     scons(Quote, scons(1, scons(2, Nil))).step(),
+    ///     Ok(scons(Quote, scons(1, scons(2, Nil))))
+    /// );
+    /// assert_eq!(
+    ///     scons(Quote, scons(
+    ///         scons(Sub, scons(2, scons(1, Nil))),
+    ///     scons(2, Nil))).step(),
+    ///     Ok(scons(Quote, scons(1, scons(2, Nil))))
+    /// );
+    /// ```
     pub fn step(self) -> Result<Self, String> {
         match self {