S7 (version 0.1.1)

prop_names: Property introspection

Description

• prop_names(x) returns the names of the properties

• prop_exists(x, "prop") returns TRUE iif x has property prop.

Usage

prop_names(object)
prop_exists(object, name)

Value

prop_names() returns a character vector; prop_exists() returns a single TRUE or FALSE.

Arguments

object

An object from a S7 class

name

The name of the parameter as a character. Partial matching is not performed.

Examples

foo <- new_class("foo", properties = list(a = class_character, b = class_integer))
f <- foo()

prop_names(f)
prop_exists(f, "a")
prop_exists(f, "c")