Add or query subject of message.

Add or query subject of message.

subject(
  msg,
  subject = NULL,
  prefix = NA,
  suffix = NA,
  interpolate = TRUE,
  .open = "{{",
  .close = "}}",
  .envir = NULL
)

Arguments

msg

A message object.

subject

A subject for the message.

prefix

A subject prefix.

suffix

A subject suffix.

interpolate

Whether or not to interpolate into input using glue.

.open

The opening delimiter.

.close

The closing delimiter.

.envir

Environment used for glue interpolation. Defaults to parent.frame().

Value

A message object or the subject of the message object (if subject is NULL).

Details

The prefix and suffix can be used to add extra subject abbreviations.

See also

to, from, cc, bcc and reply

Examples

# Create a message and set the subject
msg <- envelope() %>% subject("Updated report")

# Retrieve the subject for a message
subject(msg)
#> [1] "Updated report"
#> attr(,"class")
#> [1] "encodable"