grammar::lut_chars::lut_chars (2 of 3 overloads)

Constructor.

constexpr
lut_chars(
    char const* s);

This function constructs a character set which has as members, all of the characters present in the null-terminated string s.

constexpr lut_chars digits = "0123456789";

Linear in strlen(s), or constant if s is a constant expression.

Throws nothing.

Name	Description
`s`	A null-terminated string.