R: Options for Expression Deparsing

deparseOpts {base} | R Documentation

## Options for Expression Deparsing

### Description

Process the deparsing options for `deparse`, `dput` and `dump`.

### Usage

    .deparseOpts(control)

### Arguments

`control` | character vector of deparsing options.

### Details

This is called by `deparse`, `dput` and `dump` to process their `control` argument.

The `control` argument is a vector containing zero or more of the following strings. Partial string matching is used.

`keepInteger`
  Surround integer vectors by `as.integer()`, so they are not converted to floating point when re-parsed.
`quoteExpressions`
  Surround expressions with `quote()`, so they are not evaluated when re-parsed.
`showAttributes`
  If the object has attributes (other than a `source` attribute), use `structure()` to display them as well as the object value. This is the default for `deparse` and `dput`.
`useSource`
  If the object has a `source` attribute, display that instead of deparsing the object. Currently only applies to function definitions.
`warnIncomplete`
  Some exotic objects such as environments, external pointers, etc. can not be deparsed properly. This option causes a warning to be issued if any of those may give problems.
`all`
  An abbreviated way to specify all of the options listed above. May not be used with other options. This is the default for `dump`.
`delayPromises`
  Deparse promises in the form <promise: expression> rather than evaluating them. The value and the environment of the promise will not be shown and the deparsed code cannot be sourced.

For the most readable (but perhaps incomplete) display, use `control = NULL`. This displays the object's value, but not its attributes. The default is to display the attributes as well, but not to use any of the other options to make the result parseable.

Using `control = "all"` comes closest to making `deparse()` an inverse of `parse()`. However, not all objects are deparseable even with this option. A warning will be issued if the function recognizes that it is being asked to do the impossible.

### Value

A numerical value corresponding to the options selected.

[Package base version 2.4.1 Index]