first commit

src/lexer.rs

@@ -0,0 +1,33 @@
+use logos::{Lexer, Logos};
+
+#[derive(Logos, Debug, Clone, PartialEq)]
+#[logos(skip r"[ \t\r\n\f]+")] // Skips whitespace
+enum Token<'source> {
+    #[token("false", |_| false)]
+    #[token("true", |_| true)]
+    Bool(bool),
+
+    #[token("+")]
+    Add,
+
+    #[token("-")]
+    Substract,
+
+    #[token("*")]
+    Multiply,
+
+    #[token("/")]
+    Divide,
+    
+    #[regex(r"[_a-zA-Z][_0-9a-zA-Z]*")]
+    Ident(&'source str),
+
+    #[regex(r#""([^"\\\x00-\x1F]|\\(["\\bnfrt/]|u[a-fA-F0-9]{4}))*""#, |lex| lex.slice().to_owned())]
+    String(String),
+}
+
+fn float<'a>(lex: &mut Lexer<'a, Token<'a>>) -> Result<f64, ()> {
+    lex.slice().parse().map_err(|_| ())
+}
+
+

src/lib.rs

@@ -0,0 +1,16 @@
+mod lexer;
+
+pub fn add(left: u64, right: u64) -> u64 {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}