Function function

function(options?): FunctionShape<ArrayShape<[], null>, null, null>
Creates a shape of a function that has no arguments.
Parameters
- Optionaloptions: IssueOptions | Message
  The issue options or the issue message.
Returns FunctionShape<ArrayShape<[], null>, null, null>
function<ArgShapes>(argShapes, options?): FunctionShape<ArrayShape<ArgShapes, null>, null, null>
Creates a shape of a function with arguments parsed by corresponding shapes in the argShapes array.
Type Parameters
- ArgShapes extends [] | readonly [AnyShape, AnyShape]
  The array of argument shapes.
Parameters
- argShapes: ArgShapes
  The array of argument shapes.
- Optionaloptions: IssueOptions | Message
  The issue options or the issue message.
Returns FunctionShape<ArrayShape<ArgShapes, null>, null, null>
function<InputArgs, OutputArgs, ArgsShape>(argsShape, options?): FunctionShape<ArgsShape, null, null>
Creates a shape of a function with arguments parsed by an array shape.
Type Parameters
- InputArgs extends readonly any[]
  The array of input arguments.
- OutputArgs extends readonly any[]
  The array of input arguments.
- ArgsShape extends Shape<InputArgs, OutputArgs>
  The shape of the array of arguments.
Parameters
- argsShape: ArgsShape
  The shape of the array of arguments.
- Optionaloptions: IssueOptions | Message
  The issue options or the issue message.
Returns FunctionShape<ArgsShape, null, null>