Revert "remove docstring support"

This reverts commit 4508c10.

Author: Scony

gdtoolkit/formatter/class_statement.py

@@ -30,6 +30,7 @@ def format_class_statement(statement: Tree, context: Context) -> Outcome:
         "classname_extends_stmt": _format_classname_extends_statement,
         "class_var_stmt": _format_var_statement,
         "const_stmt": format_const_statement,
+        "docstr_stmt": _format_docstring_statement,
         "class_def": _format_class_statement,
         "func_def": _format_func_statement,
         "static_func_def": partial(
@@ -141,6 +142,11 @@ def _format_var_statement(statement: Tree, context: Context) -> Outcome:
     return formatted_lines, last_processed_line
 
 
+def _format_docstring_statement(statement: Tree, context: Context) -> Outcome:
+    expression_context = ExpressionContext("", statement.line, "", statement.end_line)
+    return format_expression(statement.children[0], expression_context, context)
+
+
 def _format_class_statement(statement: Tree, context: Context) -> Outcome:
     last_processed_line_no = statement.line
     name = statement.children[0].value

gdtoolkit/parser/gdscript.lark

@@ -12,6 +12,7 @@ _simple_class_stmt: annotation* single_class_stmt (";" annotation* single_class_
                   | classname_stmt
                   | class_var_stmt
                   | const_stmt
+                  | docstr_stmt
 ?compound_class_stmt: class_def
                     | property_body_def
                     | func_def
@@ -47,6 +48,7 @@ class_var_inf: "var" NAME ":" "=" expr [inline_property_body]
 inline_property_body: ":" [property_delegate_set ["," property_delegate_get]]
                     | ":" [property_delegate_get ["," property_delegate_set]]
 !const_stmt: "const" NAME [":" [TYPE_HINT]] "=" expr
+docstr_stmt: string
 
 class_def: "class" NAME [extends_stmt] ":" (_class_body | _class_stmt)
 _class_body: _NL _INDENT (_class_stmt+ | _class_stmt* (_simple_class_stmt | annotation+)) _DEDENT