Begin adding maps

dust-lang/src/abstract_tree.rs

@@ -36,7 +36,7 @@ impl<T: Display> Display for Node<T> {
 pub enum Statement {
     // Top-level statements
     Assignment {
-        identifier: Identifier,
+        identifier: Node<Identifier>,
         value_node: Box<Node<Statement>>,
     },
 

dust-lang/src/analyzer.rs

@@ -80,7 +80,9 @@ impl<'a> Analyzer<'a> {
             Statement::Assignment {
                 value_node: value, ..
             } => {
-                if let None = value.inner.expected_type(self.variables) {
+                self.analyze_node(value)?;
+
+                if value.inner.expected_type(self.variables).is_none() {
                     return Err(AnalyzerError::ExpectedValue {
                         actual: value.as_ref().clone(),
                         position: value.position,

dust-lang/src/lex.rs

@@ -189,6 +189,16 @@ impl Lexer {
                         (Token::Less, (self.position - 1, self.position))
                     }
                 }
+                '{' => {
+                    self.position += 1;
+
+                    (Token::LeftCurlyBrace, (self.position - 1, self.position))
+                }
+                '}' => {
+                    self.position += 1;
+
+                    (Token::RightCurlyBrace, (self.position - 1, self.position))
+                }
                 _ => {
                     self.position += 1;
 
@@ -415,6 +425,27 @@ impl From<ParseIntError> for LexError {
 mod tests {
     use super::*;
 
+    #[test]
+    fn map() {
+        let input = "{ x = 42, y = 'foobar' }";
+
+        assert_eq!(
+            lex(input),
+            Ok(vec![
+                (Token::LeftCurlyBrace, (0, 1)),
+                (Token::Identifier("x"), (2, 3)),
+                (Token::Equal, (4, 5)),
+                (Token::Integer(42), (6, 8)),
+                (Token::Comma, (8, 9)),
+                (Token::Identifier("y"), (10, 11)),
+                (Token::Equal, (12, 13)),
+                (Token::String("foobar"), (14, 22)),
+                (Token::RightCurlyBrace, (23, 24)),
+                (Token::Eof, (24, 24)),
+            ])
+        )
+    }
+
     #[test]
     fn greater_than() {
         let input = ">";

dust-lang/src/parse.rs

@@ -27,16 +27,16 @@ use crate::{
 ///     Ok(AbstractSyntaxTree {
 ///         nodes: [
 ///             Node {
-///                 inner: Statement::Assign(
-///                     Box::new(Node {
-///                         inner: Statement::Identifier("x".into()),
+///                 inner: Statement::Assignment {
+///                     identifier: Node {
+///                         inner: Identifier::new("x"),
 ///                         position: (0, 1),
-///                     }),
-///                     Box::new(Node {
+///                     },
+///                     value_node: Box::new(Node {
 ///                         inner: Statement::Constant(Value::integer(42)),
 ///                         position: (4, 6),
 ///                     })
-///                 ),
+///                 },
 ///                 position: (0, 6),
 ///             }
 ///         ].into(),
@@ -86,16 +86,16 @@ pub fn parse(input: &str) -> Result<AbstractSyntaxTree, ParseError> {
 ///     nodes,
 ///     Into::<VecDeque<Node<Statement>>>::into([
 ///         Node {
-///             inner: Statement::Assign(
-///                 Box::new(Node {
-///                     inner: Statement::Identifier("x".into()),
+///             inner: Statement::Assignment {
+///                 identifier: Node {
+///                     inner: Identifier::new("x"),
 ///                     position: (0, 1),
-///                 }),
-///                 Box::new(Node {
+///                 },
+///                 value_node: Box::new(Node {
 ///                     inner: Statement::Constant(Value::integer(42)),
 ///                     position: (4, 6),
-///                 })
-///             ),
+///                 }),
+///             },
 ///             position: (0, 6),
 ///         }
 ///     ]),
@@ -182,7 +182,7 @@ impl<'src> Parser<'src> {
 
                     return Ok(Node::new(
                         Statement::Assignment {
-                            identifier,
+                            identifier: Node::new(identifier, left_node.position),
                             value_node: Box::new(right_node),
                         },
                         (left_start, right_end),
@@ -964,7 +964,7 @@ mod tests {
             Ok(AbstractSyntaxTree {
                 nodes: [Node::new(
                     Statement::Assignment {
-                        identifier: Identifier::new("a"),
+                        identifier: Node::new(Identifier::new("a"), (0, 1)),
                         value_node: Box::new(Node::new(
                             Statement::BinaryOperation {
                                 left: Box::new(Node::new(

dust-lang/src/token.rs

@@ -31,12 +31,14 @@ pub enum Token<'src> {
     Equal,
     Greater,
     GreaterEqual,
+    LeftCurlyBrace,
     LeftParenthesis,
     LeftSquareBrace,
     Less,
     LessEqual,
     Minus,
     Plus,
+    RightCurlyBrace,
     RightParenthesis,
     RightSquareBrace,
     Star,
@@ -59,6 +61,7 @@ impl<'src> Token<'src> {
             Token::Integer(integer) => TokenOwned::Integer(*integer),
             Token::IsEven => TokenOwned::IsEven,
             Token::IsOdd => TokenOwned::IsOdd,
+            Token::LeftCurlyBrace => TokenOwned::LeftCurlyBrace,
             Token::LeftParenthesis => TokenOwned::LeftParenthesis,
             Token::LeftSquareBrace => TokenOwned::LeftSquareBrace,
             Token::Length => TokenOwned::Length,
@@ -67,6 +70,7 @@ impl<'src> Token<'src> {
             Token::Minus => TokenOwned::Minus,
             Token::Plus => TokenOwned::Plus,
             Token::ReadLine => TokenOwned::ReadLine,
+            Token::RightCurlyBrace => TokenOwned::RightCurlyBrace,
             Token::RightParenthesis => TokenOwned::RightParenthesis,
             Token::RightSquareBrace => TokenOwned::RightSquareBrace,
             Token::Star => TokenOwned::Star,
@@ -91,6 +95,7 @@ impl<'src> Token<'src> {
             Token::Integer(_) => "integer",
             Token::IsEven => "is_even",
             Token::IsOdd => "is_odd",
+            Token::LeftCurlyBrace => "{",
             Token::LeftParenthesis => "(",
             Token::LeftSquareBrace => "[",
             Token::Length => "length",
@@ -99,6 +104,7 @@ impl<'src> Token<'src> {
             Token::Minus => "-",
             Token::Plus => "+",
             Token::ReadLine => "read_line",
+            Token::RightCurlyBrace => "}",
             Token::RightParenthesis => ")",
             Token::RightSquareBrace => "]",
             Token::Star => "*",
@@ -132,6 +138,7 @@ impl<'src> PartialEq for Token<'src> {
             (Token::Integer(left), Token::Integer(right)) => left == right,
             (Token::IsEven, Token::IsEven) => true,
             (Token::IsOdd, Token::IsOdd) => true,
+            (Token::LeftCurlyBrace, Token::LeftCurlyBrace) => true,
             (Token::LeftParenthesis, Token::LeftParenthesis) => true,
             (Token::LeftSquareBrace, Token::LeftSquareBrace) => true,
             (Token::Length, Token::Length) => true,
@@ -140,6 +147,7 @@ impl<'src> PartialEq for Token<'src> {
             (Token::Minus, Token::Minus) => true,
             (Token::Plus, Token::Plus) => true,
             (Token::ReadLine, Token::ReadLine) => true,
+            (Token::RightCurlyBrace, Token::RightCurlyBrace) => true,
             (Token::RightParenthesis, Token::RightParenthesis) => true,
             (Token::RightSquareBrace, Token::RightSquareBrace) => true,
             (Token::Star, Token::Star) => true,
@@ -180,12 +188,14 @@ pub enum TokenOwned {
     Equal,
     Greater,
     GreaterOrEqual,
+    LeftCurlyBrace,
     LeftParenthesis,
     LeftSquareBrace,
     Less,
     LessOrEqual,
     Minus,
     Plus,
+    RightCurlyBrace,
     RightParenthesis,
     RightSquareBrace,
     Star,
@@ -208,6 +218,7 @@ impl Display for TokenOwned {
             TokenOwned::Integer(integer) => write!(f, "{integer}"),
             TokenOwned::IsEven => Token::IsEven.fmt(f),
             TokenOwned::IsOdd => Token::IsOdd.fmt(f),
+            TokenOwned::LeftCurlyBrace => Token::LeftCurlyBrace.fmt(f),
             TokenOwned::LeftParenthesis => Token::LeftParenthesis.fmt(f),
             TokenOwned::LeftSquareBrace => Token::LeftSquareBrace.fmt(f),
             TokenOwned::Length => Token::Length.fmt(f),
@@ -216,6 +227,7 @@ impl Display for TokenOwned {
             TokenOwned::Minus => Token::Minus.fmt(f),
             TokenOwned::Plus => Token::Plus.fmt(f),
             TokenOwned::ReadLine => Token::ReadLine.fmt(f),
+            TokenOwned::RightCurlyBrace => Token::RightCurlyBrace.fmt(f),
             TokenOwned::RightParenthesis => Token::RightParenthesis.fmt(f),
             TokenOwned::RightSquareBrace => Token::RightSquareBrace.fmt(f),
             TokenOwned::Star => Token::Star.fmt(f),

dust-lang/src/vm.rs

@@ -65,7 +65,7 @@ impl Vm {
                     });
                 };
 
-                variables.insert(identifier, value);
+                variables.insert(identifier.inner, value);
 
                 Ok(None)
             }