is_punycode: Test if string is punycode encoded

In punycoder: Unicode and Punycode Domain Name Processing

Test if string is punycode encoded

Description

Determines whether a given string or domain name is already encoded in punycode format (starts with xn– prefix).

Usage

is_punycode(x)

Arguments

x	Character vector to test

Value

A logical vector the same length as x, where TRUE indicates the element contains a punycode-encoded label (xn– prefix).

See Also

is_idn for detecting Unicode domains, puny_decode for decoding punycode domains.

Examples

is_punycode("xn--example") # TRUE
is_punycode("example.com") # FALSE
is_punycode(c("xn--caf-dma.com", "regular.com"))  # c(TRUE, FALSE)

punycoder documentation built on June 16, 2026, 9:07 a.m.