next_byte_in_range()

template<typename BasicJsonType , typename InputAdapterType >

bool nlohmann::detail::lexer< BasicJsonType, InputAdapterType >::next_byte_in_range ( std::initializer_list< char_int_type >  ranges )

inlineprivate

check if the next byte(s) are inside a given range

Adds the current byte and, for each passed range, reads a new byte and checks if it is inside the range. If a violation was detected, set up an error message and return false. Otherwise, return true.

Parameters

[in]

ranges

list of integers; interpreted as list of pairs of inclusive lower and upper bound, respectively

Precondition

The passed list ranges must have 2, 4, or 6 elements; that is, 1, 2, or 3 pairs. This precondition is enforced by an assertion.

Returns

true if and only if no range violation was detected

Definition at line 6800 of file json.hpp.

    {
        JSON_ASSERT(ranges.size() == 2 || ranges.size() == 4 || ranges.size() == 6);
        add(current);
 
        for (auto range = ranges.begin(); range != ranges.end(); ++range)
        {
            get();
 
            if (JSON_HEDLEY_LIKELY(*range <= current && current <= *(++range)))
            {
                add(current);
            }
 
            else
            {
                error_message = "invalid string: ill-formed UTF-8 byte";
                return false;
            }
        }
 
        return true;
    }