Yield a value from a generator

The yield() statement suspends generator() functions. It works like return() except that the function continues execution at the yielding point when it is called again.

yield() can be called within loops and if-else branches but for technical reasons it can't be used anywhere in R code:

• yield() cannot be called as part of a function argument. Code such as list(yield()) is illegal.

• yield() does not cross function boundaries. You can't use it a lambda function passed to lapply() for instance.

Usage

yield(x)

Arguments

x

A value to yield.

See also

generator() for examples.