From bf4632c461508de5202db98d25cd7ec06787c8dd Mon Sep 17 00:00:00 2001 From: Joel Kronqvist Date: Sat, 26 Jul 2025 10:52:03 +0300 Subject: Created necessary data structures and utilities for integers and their operations; added tests for them --- src/sexp/step.rs | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 src/sexp/step.rs (limited to 'src/sexp/step.rs') diff --git a/src/sexp/step.rs b/src/sexp/step.rs new file mode 100644 index 0000000..86ad9ea --- /dev/null +++ b/src/sexp/step.rs @@ -0,0 +1,49 @@ + +use crate::sexp::SExp; + +impl SExp { + + /// Evaluates the s-expression one step. + /// + /// **Integer operations** + /// + /// Addition, subtraction, multiplication and division + /// are supported. + /// ```rust + /// use melisp::sexp::{SExp::*, SLeaf::*, util::*}; + /// + /// assert_eq!( + /// sexp(Add, sexp(1, 1)).step().unwrap(), + /// Atom(Int(2)) + /// ); + /// + /// assert_eq!( + /// sexp(Sub, sexp(1, 2).step().unwrap()), + /// Atom(Int(-1)) + /// ); + /// + /// assert_eq!( + /// sexp(Mul, sexp(2, 3).step().unwrap()), + /// Atom(Int(6)) + /// ); + /// + /// assert_eq!( + /// sexp(Div, sexp(6, 2).step().unwrap()), + /// Atom(Int(3)) + /// ); + /// ``` + /// + /// Division truncates the decimals. + /// ```rust + /// use melisp::sexp::{SExp::*, SLeaf::*, util::*}; + /// + /// assert_eq!( + /// sexp(Div, sexp(5, 2).step().unwrap()), + /// Atom(Int(2)) + /// ); + /// + /// ``` + pub fn step(self) -> Result { + todo!(); + } +} -- cgit v1.2.3