Ensure correct handler structure

This function checks that the passed object is a function and contains the arguments "chunk", "con, and "..." - in that order. This is to help ensure users only register valid handlers.

Usage

validate_qryflow_handler(handler)

Arguments

handler

object to check

Value

Logical. Generates an error if the object does not pass all the criteria.

See also

validate_qryflow_parser() for the parser equivalent.

Examples

custom_func <- function(chunk, con, ...){

  # Parsing Code Goes Here

}

validate_qryflow_handler(custom_func)