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♻️ refactored SAX parser

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Niels Lohmann 2018-02-26 20:08:12 +01:00
parent 981e226ca2
commit 21352c4d8e
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GPG key ID: 7F3CEA63AE251B69
7 changed files with 260 additions and 110 deletions
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54
include/nlohmann/detail/input/parser.hpp
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@ -10,6 +10,7 @@
#include <nlohmann/detail/exceptions.hpp>
#include <nlohmann/detail/macro_scope.hpp>
#include <nlohmann/detail/input/input_adapters.hpp>
#include <nlohmann/detail/input/json_sax.hpp>
#include <nlohmann/detail/input/lexer.hpp>
#include <nlohmann/detail/value_t.hpp>
@ -52,54 +53,7 @@ class parser
value
};
struct SAX
{
/// a null value was read
virtual bool null() = 0;
/// a boolean value was read
virtual bool boolean(bool) = 0;
/// an integer number was read
virtual bool number_integer(number_integer_t) = 0;
/// an unsigned integer number was read
virtual bool number_unsigned(number_unsigned_t) = 0;
/// a floating-point number was read
/// the string parameter contains the raw number value
virtual bool number_float(number_float_t, const std::string&) = 0;
/// a string value was read
virtual bool string(const std::string&) = 0;
/// the beginning of an object was read
/// binary formats may report the number of elements
virtual bool start_object(std::size_t elements) = 0;
/// an object key was read
virtual bool key(const std::string&) = 0;
/// the end of an object was read
virtual bool end_object() = 0;
/// the beginning of an array was read
/// binary formats may report the number of elements
virtual bool start_array(std::size_t elements) = 0;
/// the end of an array was read
virtual bool end_array() = 0;
/// a binary value was read
/// examples are CBOR type 2 strings, MessagePack bin, and maybe UBJSON array<uint8t>
virtual bool binary(const std::vector<uint8_t>& vec) = 0;
/// a parse error occurred
/// the byte position and the last token are reported
virtual bool parse_error(std::size_t position, const std::string& last_token) = 0;
virtual ~SAX() = default;
};
using json_sax = json_sax<BasicJsonType>;
using parser_callback_t =
std::function<bool(int depth, parse_event_t event, BasicJsonType& parsed)>;
@ -111,7 +65,7 @@ class parser
: callback(cb), m_lexer(adapter), allow_exceptions(allow_exceptions_)
{}
parser(detail::input_adapter_t adapter, SAX* s)
parser(detail::input_adapter_t adapter, json_sax* s)
: m_lexer(adapter), sax(s)
{}
@ -818,7 +772,7 @@ class parser
/// whether to throw exceptions in case of errors
const bool allow_exceptions = true;
/// associated SAX parse event receiver
SAX* sax = nullptr;
json_sax* sax = nullptr;
};
}
}