Install an expression as a function — installExprFunction

installExprFunction(
  expr,
  name,
  eval.env = parent.frame(2),
  quoted = FALSE,
  assign.env = parent.frame(1),
  label = deparse(sys.call(-1)[[1]]),
  wrappedWithLabel = TRUE,
  ..stacktraceon = FALSE
)

Arguments

expr	A quoted or unquoted expression
name	The name the function should be given
eval.env	The desired environment for the function. Defaults to the calling environment two steps back.
quoted	Is the expression quoted?
assign.env	The environment in which the function should be assigned.
label	A label for the object to be shown in the debugger. Defaults to the name of the calling function.
wrappedWithLabel, ..stacktraceon	Advanced use only. For stack manipulation purposes; see stacktrace().

Description

Installs an expression in the given environment as a function, and registers debug hooks so that breakpoints may be set in the function. Note: as of Shiny 1.6.0, it is recommended to use quoToFunction() instead.

Details

This function can replace exprToFunction as follows: we may use func <- exprToFunction(expr) if we do not want the debug hooks, or installExprFunction(expr, "func") if we do. Both approaches create a function named func in the current environment.

See also

Wraps exprToFunction(); see that method's documentation for more documentation and examples.