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.