Implement Access AST node

For name.value lookups

schala-lang/language/src/ast/mod.rs

@@ -196,6 +196,7 @@ pub enum ExpressionKind {
     WhileExpression { condition: Option<Box<Expression>>, body: Block },
     ForExpression { enumerators: Vec<Enumerator>, body: Box<ForBody> },
     Lambda { params: Vec<FormalParam>, type_anno: Option<TypeIdentifier>, body: Block },
+    Access { name: Rc<String>, expr: Box<Expression> },
     ListLiteral(Vec<Expression>),
 }
 

schala-lang/language/src/ast/visitor.rs

@@ -128,6 +128,9 @@ pub fn walk_expression<V: ASTVisitor>(v: &mut V, expr: &Expression) {
             Lambda { params: _, type_anno: _, body } => {
                 walk_block(v, body);
             }
+            Access { name: _, expr } => {
+                walk_expression(v, expr);
+            }
             ListLiteral(exprs) =>
                 for expr in exprs {
                     walk_expression(v, expr);

schala-lang/language/src/ast/visualize.rs

@@ -120,6 +120,7 @@ fn render_expression(expr: &Expression, indent: usize, buf: &mut String) {
             newline(buf);
             do_indent(indent, buf);
         }
+        Access { .. } => buf.push_str("<access-expr>"),
         ListLiteral(..) => buf.push_str("<list-literal>"),
     }
     buf.push(')');

schala-lang/language/src/parsing/new_tests.rs

@@ -203,11 +203,36 @@ fn operators() {
 
 #[test]
 fn accessors() {
-    /*
-    assert_expr!("a.b");
-    assert_expr!("a.b.c.d()");
-    assert_expr!("a.b().c.d()");
-    */
+    use ExpressionKind::*;
+
+    assert_expr!("a.b", expr(Access { name: rc("b"), expr: bx(expr(Value(qn!(a)))) }));
+    assert_expr!(
+        "a.b.c",
+        expr(Access {
+            name: rc("c"),
+            expr: bx(expr(Access { name: rc("b"), expr: bx(expr(Value(qn!(a)))) }))
+        })
+    );
+    assert_expr!(
+        "a.b.c(3)",
+        expr(Call {
+            f: bx(expr(Access {
+                name: rc("c"),
+                expr: bx(expr(Access { name: rc("b"), expr: bx(expr(Value(qn!(a)))) }))
+            })),
+            arguments: vec![InvocationArgument::Positional(expr(NatLiteral(3)))],
+        })
+    );
+    assert_expr!(
+        "a.b().c",
+        expr(Access {
+            name: rc("c"),
+            expr: bx(expr(Call {
+                f: bx(expr(Access { name: rc("b"), expr: bx(expr(Value(qn!(a)))) })),
+                arguments: vec![]
+            }))
+        })
+    );
 }
 
 #[test]

schala-lang/language/src/reduced_ir/mod.rs

@@ -179,6 +179,7 @@ impl<'a, 'b> Reducer<'a, 'b> {
             WhileExpression { .. } => Expression::ReductionError("While expr not implemented".to_string()),
             ForExpression { .. } => Expression::ReductionError("For expr not implemented".to_string()),
             ListLiteral { .. } => Expression::ReductionError("ListLiteral expr not implemented".to_string()),
+            Access { .. } => unimplemented!(),
         }
     }