✨ accept functions to check if input is valid JSON #458
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Niels Lohmann
parent
d415293d41
commit
b27d2adcbe
2 changed files with 87 additions and 4 deletions
47
src/json.hpp
47
src/json.hpp
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@ -7421,6 +7421,13 @@ class basic_json
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return parse(std::begin(array), std::end(array), cb);
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}
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template<class T, std::size_t N>
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static bool accept(T (&array)[N])
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{
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// delegate the call to the iterator-range accept overload
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return accept(std::begin(array), std::end(array));
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}
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/*!
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@brief deserialize from string literal
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@ -7462,6 +7469,15 @@ class basic_json
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return parser(input_adapter::create(s), cb).parse(true);
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}
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template<typename CharT, typename std::enable_if<
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std::is_pointer<CharT>::value and
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std::is_integral<typename std::remove_pointer<CharT>::type>::value and
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sizeof(typename std::remove_pointer<CharT>::type) == 1, int>::type = 0>
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static bool accept(const CharT s)
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{
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return parser(input_adapter::create(s)).accept(true);
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}
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/*!
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@brief deserialize from stream
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@ -7497,6 +7513,11 @@ class basic_json
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return parser(input_adapter::create(i), cb).parse(true);
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}
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static bool accept(std::istream& i)
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{
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return parser(input_adapter::create(i)).accept(true);
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}
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/*!
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@copydoc parse(std::istream&, const parser_callback_t)
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*/
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@ -7506,6 +7527,11 @@ class basic_json
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return parser(input_adapter::create(i), cb).parse(true);
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}
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static bool accept(std::istream&& i)
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{
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return parser(input_adapter::create(i)).accept(true);
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}
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/*!
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@brief deserialize from an iterator range with contiguous storage
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@ -7561,6 +7587,15 @@ class basic_json
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return parser(input_adapter::create(first, last), cb).parse(true);
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}
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template<class IteratorType, typename std::enable_if<
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std::is_base_of<
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std::random_access_iterator_tag,
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typename std::iterator_traits<IteratorType>::iterator_category>::value, int>::type = 0>
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static bool accept(IteratorType first, IteratorType last)
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{
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return parser(input_adapter::create(first, last)).accept(true);
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}
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/*!
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@brief deserialize from a container with contiguous storage
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@ -7618,6 +7653,18 @@ class basic_json
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return parse(std::begin(c), std::end(c), cb);
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}
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template<class ContiguousContainer, typename std::enable_if<
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not std::is_pointer<ContiguousContainer>::value and
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std::is_base_of<
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std::random_access_iterator_tag,
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typename std::iterator_traits<decltype(std::begin(std::declval<ContiguousContainer const>()))>::iterator_category>::value
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, int>::type = 0>
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static bool accept(const ContiguousContainer& c)
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{
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// delegate the call to the iterator-range accept overload
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return accept(std::begin(c), std::end(c));
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}
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/*!
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@brief deserialize from stream
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@deprecated This stream operator is deprecated and will be removed in a
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@ -39,9 +39,11 @@ TEST_CASE("deserialization")
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{
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SECTION("stream")
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{
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std::stringstream ss;
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ss << "[\"foo\",1,2,3,false,{\"one\":1}]";
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json j = json::parse(ss);
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std::stringstream ss1, ss2;
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ss1 << "[\"foo\",1,2,3,false,{\"one\":1}]";
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ss2 << "[\"foo\",1,2,3,false,{\"one\":1}]";
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json j = json::parse(ss1);
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CHECK(json::accept(ss2));
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CHECK(j == json({"foo", 1, 2, 3, false, {{"one", 1}}}));
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}
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@ -49,6 +51,7 @@ TEST_CASE("deserialization")
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{
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auto s = "[\"foo\",1,2,3,false,{\"one\":1}]";
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json j = json::parse(s);
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CHECK(json::accept(s));
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CHECK(j == json({"foo", 1, 2, 3, false, {{"one", 1}}}));
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}
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@ -56,6 +59,7 @@ TEST_CASE("deserialization")
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{
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json::string_t s = "[\"foo\",1,2,3,false,{\"one\":1}]";
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json j = json::parse(s);
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CHECK(json::accept(s));
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CHECK(j == json({"foo", 1, 2, 3, false, {{"one", 1}}}));
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}
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@ -87,12 +91,14 @@ TEST_CASE("deserialization")
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{
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SECTION("stream")
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{
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std::stringstream ss1, ss2;
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std::stringstream ss1, ss2, ss3;
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ss1 << "[\"foo\",1,2,3,false,{\"one\":1}";
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ss2 << "[\"foo\",1,2,3,false,{\"one\":1}";
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ss3 << "[\"foo\",1,2,3,false,{\"one\":1}";
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CHECK_THROWS_AS(json::parse(ss1), json::parse_error);
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CHECK_THROWS_WITH(json::parse(ss2),
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"[json.exception.parse_error.101] parse error at 29: syntax error - unexpected end of input; expected ']'");
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CHECK(not json::accept(ss3));
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}
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SECTION("string")
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@ -101,6 +107,7 @@ TEST_CASE("deserialization")
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CHECK_THROWS_AS(json::parse(s), json::parse_error);
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CHECK_THROWS_WITH(json::parse(s),
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"[json.exception.parse_error.101] parse error at 29: syntax error - unexpected end of input; expected ']'");
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CHECK(not json::accept(s));
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}
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SECTION("operator<<")
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@ -141,18 +148,21 @@ TEST_CASE("deserialization")
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{
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std::vector<uint8_t> v = {'t', 'r', 'u', 'e'};
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CHECK(json::parse(v) == json(true));
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CHECK(json::accept(v));
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}
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SECTION("from std::array")
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{
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std::array<uint8_t, 5> v { {'t', 'r', 'u', 'e'} };
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CHECK(json::parse(v) == json(true));
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CHECK(json::accept(v));
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}
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SECTION("from array")
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{
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uint8_t v[] = {'t', 'r', 'u', 'e'};
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CHECK(json::parse(v) == json(true));
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CHECK(json::accept(v));
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}
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SECTION("from chars")
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@ -164,6 +174,7 @@ TEST_CASE("deserialization")
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v[3] = 'e';
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v[4] = '\0';
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CHECK(json::parse(v) == json(true));
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CHECK(json::accept(v));
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delete[] v;
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}
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@ -171,18 +182,21 @@ TEST_CASE("deserialization")
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{
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std::string v = {'t', 'r', 'u', 'e'};
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CHECK(json::parse(v) == json(true));
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CHECK(json::accept(v));
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}
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SECTION("from std::initializer_list")
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{
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std::initializer_list<uint8_t> v = {'t', 'r', 'u', 'e'};
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CHECK(json::parse(v) == json(true));
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CHECK(json::accept(v));
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}
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SECTION("empty container")
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{
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std::vector<uint8_t> v;
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CHECK_THROWS_AS(json::parse(v), json::parse_error);
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CHECK(not json::accept(v));
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}
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}
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@ -192,42 +206,49 @@ TEST_CASE("deserialization")
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{
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std::vector<uint8_t> v = {'t', 'r', 'u', 'e'};
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CHECK(json::parse(std::begin(v), std::end(v)) == json(true));
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CHECK(json::accept(std::begin(v), std::end(v)));
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}
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SECTION("from std::array")
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{
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std::array<uint8_t, 5> v { {'t', 'r', 'u', 'e'} };
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CHECK(json::parse(std::begin(v), std::end(v)) == json(true));
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CHECK(json::accept(std::begin(v), std::end(v)));
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}
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SECTION("from array")
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{
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uint8_t v[] = {'t', 'r', 'u', 'e'};
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CHECK(json::parse(std::begin(v), std::end(v)) == json(true));
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CHECK(json::accept(std::begin(v), std::end(v)));
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}
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SECTION("from std::string")
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{
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std::string v = {'t', 'r', 'u', 'e'};
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CHECK(json::parse(std::begin(v), std::end(v)) == json(true));
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CHECK(json::accept(std::begin(v), std::end(v)));
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}
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SECTION("from std::initializer_list")
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{
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std::initializer_list<uint8_t> v = {'t', 'r', 'u', 'e'};
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CHECK(json::parse(std::begin(v), std::end(v)) == json(true));
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CHECK(json::accept(std::begin(v), std::end(v)));
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}
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SECTION("from std::valarray")
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{
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std::valarray<uint8_t> v = {'t', 'r', 'u', 'e'};
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CHECK(json::parse(std::begin(v), std::end(v)) == json(true));
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CHECK(json::accept(std::begin(v), std::end(v)));
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}
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SECTION("with empty range")
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{
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std::vector<uint8_t> v;
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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}
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@ -238,90 +259,105 @@ TEST_CASE("deserialization")
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{
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uint8_t v[] = {'\"', 'a', 'a', 'a', 'a', 'a', 'a', '\\', 'u'};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 2")
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{
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uint8_t v[] = {'\"', 'a', 'a', 'a', 'a', 'a', 'a', '\\', 'u', '1'};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 3")
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{
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uint8_t v[] = {'\"', 'a', 'a', 'a', 'a', 'a', 'a', '\\', 'u', '1', '1', '1', '1', '1', '1', '1', '1'};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 4")
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{
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uint8_t v[] = {'\"', 'a', 'a', 'a', 'a', 'a', 'a', 'u', '1', '1', '1', '1', '1', '1', '1', '1', '\\'};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 5")
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{
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uint8_t v[] = {'\"', 0x7F, 0xC1};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 6")
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{
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uint8_t v[] = {'\"', 0x7F, 0xDF, 0x7F};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 7")
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{
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uint8_t v[] = {'\"', 0x7F, 0xDF, 0xC0};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 8")
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{
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uint8_t v[] = {'\"', 0x7F, 0xE0, 0x9F};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 9")
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{
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uint8_t v[] = {'\"', 0x7F, 0xEF, 0xC0};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 10")
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{
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uint8_t v[] = {'\"', 0x7F, 0xED, 0x7F};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 11")
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{
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uint8_t v[] = {'\"', 0x7F, 0xF0, 0x8F};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 12")
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{
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uint8_t v[] = {'\"', 0x7F, 0xF0, 0xC0};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 13")
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{
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uint8_t v[] = {'\"', 0x7F, 0xF3, 0x7F};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 14")
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{
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uint8_t v[] = {'\"', 0x7F, 0xF3, 0xC0};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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SECTION("case 15")
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{
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uint8_t v[] = {'\"', 0x7F, 0xF4, 0x7F};
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CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
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CHECK(not json::accept(std::begin(v), std::end(v)));
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}
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}
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}
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