An uniprocess future is a future whose value will be resolved synchronously in the current process

UniprocessFuture(
  expr = NULL,
  substitute = TRUE,
  envir = parent.frame(),
  globals = TRUE,
  packages = NULL,
  lazy = FALSE,
  local = TRUE,
  ...
)

SequentialFuture(
  expr = NULL,
  envir = parent.frame(),
  substitute = TRUE,
  lazy = FALSE,
  globals = TRUE,
  local = TRUE,
  ...
)

TransparentFuture(
  expr = NULL,
  envir = parent.frame(),
  substitute = TRUE,
  lazy = FALSE,
  globals = TRUE,
  local = FALSE,
  ...
)

Arguments

expr

An R expression.

substitute

If TRUE, argument expr is substitute():ed, otherwise not.

envir

The environment from where global objects should be identified.

globals

(optional) a logical, a character vector, or a named list to control how globals are handled. For details, see section 'Globals used by future expressions' in the help for future().

packages

(optional) a character vector specifying packages to be attached in the R environment evaluating the future.

lazy

If FALSE (default), the future is resolved eagerly (starting immediately), otherwise not.

local

If TRUE, the expression is evaluated such that all assignments are done to local temporary environment, otherwise the assignments are done to the global environment of the R process evaluating the future.

...

Additional named elements passed to Future().

Value

UniprocessFuture() returns an object of class UniprocessFuture.

SequentialFuture() returns an object of class SequentialProcess, which inherits from UniprocessFuture.

Usage

To use 'sequential' futures, use plan(sequential), cf. sequential.