R: A future with a constant value

ConstantFuture-class {future} | R Documentation

## A future with a constant value

### Description

A constant future is a future whose expression is a constant and therefore by definition already resolved upon creation.

### Usage

    ConstantFuture(expr = NULL, envir = emptyenv(), substitute = FALSE,
      globals = NULL, packages = NULL, local = FALSE, ...)

### Arguments

`expr` | An R expression.
`envir` | The environment from where global objects should be identified.
`substitute` | If TRUE, argument `expr` is `substitute()`:ed, otherwise not.
`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.
`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.
`...` | Not used.

### Value

An object of class `ConstantFuture`.

[Package future version 1.9.0 Index]