is.function

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Is an Object of Type (Primitive) Function?

Checks whether its argument is a (primitive) function.

Keywords
programming
Usage
is.function(x)
is.primitive(x)
Arguments
x

an R object.

Details

is.primitive(x) tests if x is a primitive function, i.e, if typeof(x) is either "builtin" or "special".

Value

TRUE if x is a (primitive) function, and FALSE otherwise.

Aliases
  • is.function
  • is.primitive
Examples
library(base) # NOT RUN { is.function(1) # FALSE is.function (is.primitive) # TRUE: it is a function, but .. is.primitive(is.primitive) # FALSE: it's not a primitive one, whereas is.primitive(is.function) # TRUE: that one *is* # }
Documentation reproduced from package base, version 3.6.0, License: Part of R 3.6.0

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