R: Get first or all references of an R object

find_references {future} | R Documentation

## Get first or all references of an R object

### Description

Get first or all references of an R object

Assert that there are no references among the identified globals

### Usage

    find_references(x, first_only = FALSE)

    assert_no_references(x, action = c("error", "warning", "message", "string"))

### Arguments

`x` | The R object to be checked.
`first_only` | If 'TRUE', only the first reference is returned, otherwise all references.
`action` | Type of action to take if a reference is found.

### Value

'find_references()' returns a list of one or more references identified.

If a reference is detected, an informative error, warning, message, or a character string is produced, otherwise 'NULL' is returned invisibly.

[Package future version 1.8.0 Index]