installExprFunction: Install an expression as a function
Description
Installs an expression in the given environment as a function, and registers
debug hooks so that breakpoints may be set in the function.Usage
installExprFunction(expr, name, eval.env = parent.frame(2), quoted = FALSE,
assign.env = parent.frame(1), label = as.character(sys.call(-1)[[1]]))
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.
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.