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♻️ allow to continue after parse error

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This commit is contained in:
Niels Lohmann
2024-11-30 13:56:32 +01:00
parent 7c97655f59
commit cd1e38dcc4
1 changed files with 34 additions and 4 deletions
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38
tests/src/unit-class_parser.cpp
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@@ -117,15 +117,28 @@ class SaxEventLogger
return true;
}
bool parse_error(std::size_t position, const std::string& /*unused*/, const json::exception& /*unused*/)
bool parse_error(std::size_t position, const std::string& msg, const json::exception& exception)
{
errored = true;
events.push_back("parse_error(" + std::to_string(position) + ")");
return false;
events.push_back("parse_error(position=" + std::to_string(position) + ", token=<" + msg + ">, exception=" + exception.what() + ")");
return return_value_for_parse_error;
}
std::vector<std::string> events {}; // NOLINT(readability-redundant-member-init)
bool errored = false;
const bool return_value_for_parse_error = false;
std::string event_string()
{
return std::accumulate(events.begin(), events.end(), std::string(),
[](const std::string & a, const std::string & b)
{
return a.empty() ? b : a + '\n' + b;
});
}
explicit SaxEventLogger(bool continue_after_parse_error)
: return_value_for_parse_error(continue_after_parse_error)
{}
};
class SaxCountdown : public nlohmann::json::json_sax_t
@@ -244,7 +257,7 @@ bool accept_helper(const std::string& s)
CHECK(ok_noexcept == ok_accept);
// 4. parse with SAX (compare with relaxed accept result)
SaxEventLogger el;
SaxEventLogger el(false);
CHECK_NOTHROW(json::sax_parse(s, &el, json::input_format_t::json, false));
CHECK(json::parser(nlohmann::detail::input_adapter(s)).accept(false) == !el.errored);
@@ -1680,6 +1693,23 @@ TEST_CASE("parser class")
CHECK(json::sax_parse("\"foo\"", &s) == false);
}
}
SECTION("SAX parser continuing after parse error")
{
SaxEventLogger sax(true);
SECTION("Foo")
{
CHECK(json::sax_parse("[{1}, \"a\"]", &sax));
CHECK(sax.event_string() == "start_array()\n"
"start_object()\n"
"parse_error(position=3, token=<1>, exception=[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing object key - unexpected number literal; expected string literal)\n"
"key(1)\n"
"parse_error(position=4, token=<1}>, exception=[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing object separator - unexpected '}'; expected ':')\n"
"parse_error(position=5, token=<1},>, exception=[json.exception.parse_error.101] parse error at line 1, column 5: syntax error while parsing value - unexpected ','; expected '[', '{', or a literal)\n"
"parse_error(position=9, token=<\"a\">, exception=[json.exception.parse_error.101] parse error at line 1, column 9: syntax error while parsing value - unexpected string literal; expected end of input)");
}
}
}
SECTION("error messages for comments")