Begin implementing ranges

src/lexer.rs

@@ -4,7 +4,7 @@ use chumsky::prelude::*;
 
 use crate::error::Error;
 
-#[derive(Clone, Debug, PartialEq)]
+#[derive(Copy, Clone, Debug, PartialEq)]
 pub enum Token<'src> {
     Boolean(bool),
     Integer(i64),
@@ -16,7 +16,7 @@ pub enum Token<'src> {
     Keyword(&'src str),
 }
 
-#[derive(Clone, Debug, PartialEq)]
+#[derive(Copy, Clone, Debug, PartialEq)]
 pub enum Operator {
     Add,
     AddAssign,
@@ -61,7 +61,7 @@ impl Display for Operator {
     }
 }
 
-#[derive(Clone, Debug, PartialEq)]
+#[derive(Copy, Clone, Debug, PartialEq)]
 pub enum Control {
     CurlyOpen,
     CurlyClose,
@@ -73,6 +73,7 @@ pub enum Control {
     DoubleColon,
     Colon,
     Dot,
+    DoubleDot,
     Semicolon,
 }
 
@@ -89,6 +90,7 @@ impl Display for Control {
             Control::DoubleColon => write!(f, "::"),
             Control::Colon => write!(f, ":"),
             Control::Dot => write!(f, "."),
+            Control::DoubleDot => write!(f, ".."),
             Control::Semicolon => write!(f, ";"),
         }
     }
@@ -202,6 +204,7 @@ pub fn lexer<'src>() -> impl Parser<
         just(";").padded().to(Control::Semicolon),
         just("::").padded().to(Control::DoubleColon),
         just(":").padded().to(Control::Colon),
+        just("..").padded().to(Control::DoubleDot),
         just(".").padded().to(Control::Dot),
     ))
     .map(Token::Control);
@@ -234,6 +237,18 @@ pub fn lexer<'src>() -> impl Parser<
 mod tests {
     use super::*;
 
+    #[test]
+    fn range() {
+        assert_eq!(
+            lex("1..10").unwrap(),
+            vec![
+                (Token::Integer(1), (0..1).into()),
+                (Token::Control(Control::DoubleDot), (1..3).into()),
+                (Token::Integer(10), (3..5).into())
+            ]
+        )
+    }
+
     #[test]
     fn math_operators() {
         assert_eq!(

src/parser.rs

@@ -95,6 +95,18 @@ pub fn parser<'src>() -> DustParser<'src> {
             .map(|identifier| Expression::Identifier(identifier))
             .boxed();
 
+        let range = {
+            let raw_integer = select! {
+                Token::Integer(integer) => integer
+            };
+
+            raw_integer
+                .clone()
+                .then_ignore(just(Token::Control(Control::DoubleDot)))
+                .then(raw_integer)
+                .map(|(start, end)| Expression::Value(ValueNode::Range(start..end)))
+        };
+
         let list = expression
             .clone()
             .separated_by(just(Token::Control(Control::Comma)))
@@ -201,6 +213,7 @@ pub fn parser<'src>() -> DustParser<'src> {
             .boxed();
 
         choice((
+            range,
             r#enum,
             logic_math_and_index,
             identifier_expression,
@@ -314,6 +327,14 @@ mod tests {
 
     use super::*;
 
+    #[test]
+    fn range() {
+        assert_eq!(
+            parse(&lex("1..10").unwrap()).unwrap()[0].0,
+            Statement::Expression(Expression::Value(ValueNode::Range(1..10)))
+        )
+    }
+
     #[test]
     fn function() {
         assert_eq!(