Added boilerplate and tests for booleans, integer comparisons and boolean operators.

1 files changed, 114 insertions, 0 deletions

diff --git a/src/sexp/step.rs b/src/sexp/step.rs
index ee76ebf..bb3ada5 100644
--- a/src/sexp/step.rs
+++ b/src/sexp/step.rs
@@ -44,6 +44,7 @@ impl SExp {
     /// ```
     ///
     /// Also, addition and multiplication can take more than two arguments:
+    /// (as of 2025-08-05 not allowed by the type system, might change)
     /// ```rust
     /// use myslip::sexp::{SExp::*, SLeaf::*, util::*};
     ///
@@ -84,6 +85,119 @@ impl SExp {
     ///
     /// ```
     ///
+    /// **Integer comparisons**
+    ///
+    /// ```rust
+    /// use myslip::sexp::{SExp::*, SLeaf::*, util::*};
+    ///
+    /// assert_eq!(
+    ///     scons(Lt, scons(1, scons(2, Nil))).step(),
+    ///     Ok(Atom(True))
+    /// );
+    /// assert_eq!(
+    ///     scons(Lt, scons(2, scons(2, Nil))).step(),
+    ///     Ok(Atom(False))
+    /// );
+    ///
+    /// assert_eq!(
+    ///     scons(Gt, scons(2, scons(1, Nil))).step(),
+    ///     Ok(Atom(True))
+    /// );
+    /// assert_eq!(
+    ///     scons(Lt, scons(1, scons(1, Nil))).step(),
+    ///     Ok(Atom(False))
+    /// );
+    ///
+    /// assert_eq!(
+    ///     scons(Le, scons(1, scons(2, Nil))).step(),
+    ///     Ok(Atom(True))
+    /// );
+    /// assert_eq!(
+    ///     scons(Le, scons(2, scons(2, Nil))).step(),
+    ///     Ok(Atom(True))
+    /// );
+    /// assert_eq!(
+    ///     scons(Lt, scons(2, scons(1, Nil))).step(),
+    ///     Ok(Atom(False))
+    /// );
+    ///
+    /// assert_eq!(
+    ///     scons(Ge, scons(2, scons(1, Nil))).step(),
+    ///     Ok(Atom(True))
+    /// );
+    /// assert_eq!(
+    ///     scons(Ge, scons(1, scons(1, Nil))).step(),
+    ///     Ok(Atom(True))
+    /// );
+    /// assert_eq!(
+    ///     scons(Lt, scons(1, scons(2, Nil))).step(),
+    ///     Ok(Atom(False))
+    /// );
+    ///
+    /// assert_eq!(
+    ///     scons(Eq, scons(1, scons(2, Nil))).step(),
+    ///     Ok(Atom(False))
+    /// );
+    /// assert_eq!(
+    ///     scons(Eq, scons(2, scons(2, Nil))).step(),
+    ///     Ok(Atom(True))
+    /// );
+    ///
+    /// assert_eq!(
+    ///     scons(Neq, scons(1, scons(2, Nil))).step(),
+    ///     Ok(Atom(True))
+    /// );
+    /// assert_eq!(
+    ///     scons(Neq, scons(2, scons(2, Nil))).step(),
+    ///     Ok(Atom(False))
+    /// );
+    /// ```
+    ///
+    /// **Boolean expressions**
+    ///
+    /// ```rust
+    /// use myslip::sexp::{SExp::*, SLeaf::*, util::*};
+    /// assert_eq!(
+    ///     scons(And, scons(True, scons(True, Nil))).step(),
+    ///     Ok(Atom(True))
+    /// );
+    /// assert_eq!(
+    ///     scons(And, scons(False, scons(True, Nil))).step(),
+    ///     Ok(Atom(False))
+    /// );
+    ///
+    /// assert_eq!(
+    ///     scons(Or, scons(False, scons(True, Nil))).step(),
+    ///     Ok(Atom(True))
+    /// );
+    /// assert_eq!(
+    ///     scons(Or, scons(False, scons(False, Nil))).step(),
+    ///     Ok(Atom(False))
+    /// );
+    ///
+    /// assert_eq!(
+    ///     scons(Xor, scons(False, scons(True, Nil))).step(),
+    ///     Ok(Atom(True))
+    /// );
+    /// assert_eq!(
+    ///     scons(Xor, scons(False, scons(False, Nil))).step(),
+    ///     Ok(Atom(False))
+    /// );
+    /// assert_eq!(
+    ///     scons(Xor, scons(True, scons(True, Nil))).step(),
+    ///     Ok(Atom(False))
+    /// );
+    ///
+    /// assert_eq!(
+    ///     scons(Not, scons(True, Nil)).step(),
+    ///     Ok(Atom(False))
+    /// );
+    /// assert_eq!(
+    ///     scons(Not, scons(False, Nil)).step(),
+    ///     Ok(Atom(True))
+    /// );
+    /// ```
+    ///
     /// **Quotes**
     /// If an s-expression should not be evaluated
     /// as a function, but it is instead to be treated