Add fields to map type

dust-lang/src/abstract_tree/type.rs

@@ -244,11 +244,15 @@ impl Display for Type {
             Type::Integer => write!(f, "int"),
             Type::List { length, item_type } => write!(f, "[{length}; {}]", item_type),
             Type::ListOf(item_type) => write!(f, "[{}]", item_type),
-            Type::Map(item_types) => {
+            Type::Map(map) => {
-                writeln!(f, "{{")?;
+                write!(f, "{{ ")?;
 
-                for (identifier, r#type) in item_types {
+                for (index, (key, r#type)) in map.into_iter().enumerate() {
-                    writeln!(f, "{identifier}: {type}")?;
+                    write!(f, "{key}: {type}")?;
+
+                    if index != map.len() - 1 {
+                        write!(f, ", ")?;
+                    }
                 }
 
                 write!(f, " }}")

dust-lang/src/parser/tests.rs

@@ -2,6 +2,36 @@ use crate::lexer::lex;
 
 use super::*;
 
+#[test]
+fn map_type() {
+    assert_eq!(
+        parse(&lex("type Map = { x: int, y: str }").unwrap()).unwrap()[0],
+        Statement::TypeAlias(
+            TypeAlias::new(
+                Identifier::new("Map").with_position((5, 8)),
+                TypeConstructor::Map(
+                    vec![
+                        (
+                            Identifier::new("x").with_position((13, 14)),
+                            TypeConstructor::Raw(
+                                RawTypeConstructor::Integer.with_position((16, 19))
+                            )
+                        ),
+                        (
+                            Identifier::new("y").with_position((21, 22)),
+                            TypeConstructor::Raw(
+                                RawTypeConstructor::String.with_position((24, 27))
+                            )
+                        )
+                    ]
+                    .with_position((11, 29))
+                )
+            )
+            .with_position((0, 29))
+        )
+    );
+}
+
 #[test]
 fn type_invokation() {
     assert_eq!(

dust-lang/src/value.rs

@@ -154,13 +154,17 @@ impl Display for Value {
                 write!(f, "]")
             }
             ValueInner::Map(map) => {
-                write!(f, "[")?;
+                write!(f, "{{ ")?;
 
-                for (key, value) in map {
+                for (index, (key, value)) in map.into_iter().enumerate() {
-                    writeln!(f, "{key} = {value},")?;
+                    write!(f, "{key} = {value}")?;
+
+                    if index != map.len() - 1 {
+                        write!(f, ", ")?;
+                    }
                 }
 
-                write!(f, "]")
+                write!(f, " }}")
             }
             ValueInner::Range(_) => todo!(),
             ValueInner::String(string) => write!(f, "{string}"),