assertive (version 0.2-6)

assert_is_function: Is the input a function?

Description

Checks to see if the input is a function.

Usage

assert_is_function(x)

assert_is_primitive(x)

assert_is_stepfun(x)

is_function(x, .xname = get_name_in_parent(x))

is_primitive(x, .xname = get_name_in_parent(x))

is_stepfun(x, .xname = get_name_in_parent(x))

Arguments

x

Input to check.

.xname

Not intended to be used directly.

Value

• is_function, is_primitive and is_stepfun wrap is.function, is.primitive and is.stepfun repsectively, providing more information on failure. The assert_* functions return nothing but throw an error if the corresponding is_* function returns FALSE.

See Also

is.function.

Examples

assert_is_function(sqrt)
assert_is_function(function(){})