ExecutionQueryMatches.single: def of bendvy-ecs-core@0.1.0.3
Import: import bendvy-ecs-core@0.1.0.3/execution_query_matches.bend as ExecutionQueryMatches
Lines 49-53 of bendvy-ecs-core@0.1.0.3/execution_query_matches.bend: https://jend.leeeet.dev/read.txt?path=bendvy-ecs-core@0.1.0.3/execution_query_matches.bend&start_line=49&end_line=53

import Base

def single(-V:Data,rows:List<&2,Row<V>>) -> Single<V>:
  match rows:
    case []:NoMatch{}
    case row <> []:One{row}
    case _ <> _ <> _:Multiple{}

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/execution_query_matches.bend&name=Row
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/execution_query_matches.bend&name=Single