charbelrami

program = [ comment ], [ "port" ], "module", module_name, "exposing", "(", exposed_list, ")", { import_statement }, { declaration }, { comment };

module_name = identifier, { ".", identifier }, [ comment ];
exposed_list = identifier | "(", identifier, { ",", identifier }, ")", [ comment ] | "..";

import_statement = "import", module_name, [ import_alias ], [ "exposing", "(", exposed_list, ")" ], [ comment ];
import_alias = "as", identifier, [ comment ];

declaration = type_declaration 
            | type_alias_declaration