libtld/tld_emails.cpp
bool is_quoted_char(char c)
{
    // 0x7F is the Delete key which is viewed as a control
    // here we accept all characters over 127 in case the user
    // has UTF-8 as input data
    return c == '\t' || c >= ' ' && c != 0x7F;
}
/** \brief Check whether a character can be quoted.
 *
 * The quoted characters are visible characters and white spaces (space 0x20,
 * and horizontal tab 0x09).
 *
 * \param[in] c  The character being escaped to know whether it can be.
 *
 * \return true if the character can be used with \\, false otherwise
 */
\brief Check whether a character can be quoted.
The quoted characters are visible characters and white spaces (space 0x20,
and horizontal tab 0x09).

\param[in] c  The character being escaped to know whether it can be.

\return true if the character can be used with \\, false otherwise
\ brief Check whether a character can be quoted . The quoted characters are visible characters and white spaces ( space 0x20 and horizontal tab 0x09 ) . \ param [ in ] c The character being escaped to know whether it can be . \ return true if the character can be used with \\ false otherwise
bool is_quoted_char(char c)
{
    return c == '\t' || c >= ' ' && c != 0x7F;
}
bool is_quoted_char ( char c ) { return c == ' \t ' || c >= ' ' && c != 0x7F ; }
\brief Check whether a character can be quoted.
\ brief Check whether a character can be quoted .
// 0x7F is the Delete key which is viewed as a control // here we accept all characters over 127 in case the user // has UTF-8 as input data