in Sources/ArgumentParser/Completions/ZshCompletionsGenerator.swift [134:163]
func zshCompletionString(_ commands: [ParsableCommand.Type]) -> String? {
guard help.shouldDisplay else { return nil }
var inputs: String
switch update {
case .unary:
inputs = ":\(valueName):\(zshActionString(commands))"
case .nullary:
inputs = ""
}
let line: String
switch names.count {
case 0:
line = ""
case 1:
line = """
\(names[0].synopsisString)\(zshCompletionAbstract)
"""
default:
let synopses = names.map { $0.synopsisString }
line = """
(\(synopses.joined(separator: " ")))'\
{\(synopses.joined(separator: ","))}\
'\(zshCompletionAbstract)
"""
}
return "'\(line)\(inputs)'"
}