syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"self.pos.curr_effect_index.map_or_else("}]}
source_snippet:             self.pos.curr_effect_index.map_or_else(
context_before:         let next_effect = if A::Direction::IS_FORWARD {
context_after:                 || Effect::Early.at_index(0),