class PureOp

Stateless Operator base for pure functions.

All arguments can be evt- and val-capable. If one of the arguments is an !-stream, it will be the only Input.hot. If there are no !-streams, all inputs are hot. Passing more than one !-stream is an argument error.

To use PureOp, extend the class and set/implement only pattern, type and Op:tick.

index

members

• pureop.pattern  – the argument pattern.
• pureop\type(args)  – the result type or a method that returns it.
• pureop\setup(inputs, scope[, extra_inputs])  – set up inputs for a range of things.

details

members

• pureop.pattern  – the argument pattern.
  Must resolve to a simple sequence-table (depth 1).

  • pattern (match.Pattern)
• pureop\type(args)  – the result type or a method that returns it.
  Can be either a method or just a fixed type.

  parameters:

  • args (table): as parsed by pattern

  returns:

  1. (type.Type)
• pureop\setup(inputs, scope[, extra_inputs])  – set up inputs for a range of things.

  parameters:

  • inputs ({RTNode,...}): a sequence of RTNodes
  • scope (Scope): (unused)
  • extra_inputs (table): table of Inputs to merge into pureop result (optional)