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.
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.