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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 [link url.ref.boost__urls__grammar__lut_chars.lut_chars `lut_chars`] digits = "0123456789" ;
Linear in strlen(s)
,
or constant if s
is a
constant expression.
Throws nothing.
Name |
Description |
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|
A null-terminated string. |