Assertions

Utility functions, mainly intended for asserting common preconditions are exported for convenience in dependent packages.

Usage

is_scalar(x)

is_string(x)

is_bool(x)

is_intish(x)

is_count(x, allow_zero = TRUE)

is_number(x)

not_null(...)

has_length(x)

Arguments

x

Object to check

allow_zero

Determines whether the value 0 is considered a valid count

...

Silently ignored

Value

Scalar logical value.