Add parser support for expression statements

compiler/parser/src/parser/statement.rs

@@ -99,11 +99,12 @@ impl ParserContext<'_> {
 
             Ok(Statement::Assign(Box::new(AssignStatement { span, place, value })))
         } else {
-            // Error on `expr;` but recover as an empty block `{}`.
-            self.expect(&Token::Semicolon)?;
-            let span = place.span() + self.prev_token.span;
-            self.emit_err(ParserError::expr_stmts_disallowed(span));
-            Ok(Statement::dummy(span))
+            // Parse the expression as a statement.
+            let end = self.expect(&Token::Semicolon)?;
+            Ok(Statement::Expression(ExpressionStatement {
+                span: place.span() + end,
+                expression: place,
+            }))
         }
     }
 

errors/src/errors/parser/parser_errors.rs

@@ -199,14 +199,6 @@ create_messages!(
         help: None,
     }
 
-    /// Parsed an expression statement.
-    @formatted
-    expr_stmts_disallowed {
-        args: (),
-        msg: "Expression statements are not supported.",
-        help: None,
-    }
-
     /// Parsed an unknown method call on the type of an expression.
     @formatted
     invalid_method_call {