| /* Copyright (c) 2013 Dropbox, Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "json11.hpp" |
| #include <cassert> |
| #include <cmath> |
| #include <cstdlib> |
| #include <cstdio> |
| #include <limits> |
| |
| namespace json11 { |
| |
| static const int max_depth = 200; |
| |
| using std::string; |
| using std::vector; |
| using std::map; |
| using std::make_shared; |
| using std::initializer_list; |
| using std::move; |
| |
| /* Helper for representing null - just a do-nothing struct, plus comparison |
| * operators so the helpers in JsonValue work. We can't use nullptr_t because |
| * it may not be orderable. |
| */ |
| struct NullStruct { |
| bool operator==(NullStruct) const { return true; } |
| bool operator<(NullStruct) const { return false; } |
| }; |
| |
| /* * * * * * * * * * * * * * * * * * * * |
| * Serialization |
| */ |
| |
| static void dump(NullStruct, string &out) { |
| out += "null"; |
| } |
| |
| static void dump(double value, string &out) { |
| if (std::isfinite(value)) { |
| char buf[32]; |
| snprintf(buf, sizeof buf, "%.17g", value); |
| out += buf; |
| } else { |
| out += "null"; |
| } |
| } |
| |
| static void dump(int value, string &out) { |
| char buf[32]; |
| snprintf(buf, sizeof buf, "%d", value); |
| out += buf; |
| } |
| |
| static void dump(bool value, string &out) { |
| out += value ? "true" : "false"; |
| } |
| |
| static void dump(const string &value, string &out) { |
| out += '"'; |
| for (size_t i = 0; i < value.length(); i++) { |
| const char ch = value[i]; |
| if (ch == '\\') { |
| out += "\\\\"; |
| } else if (ch == '"') { |
| out += "\\\""; |
| } else if (ch == '\b') { |
| out += "\\b"; |
| } else if (ch == '\f') { |
| out += "\\f"; |
| } else if (ch == '\n') { |
| out += "\\n"; |
| } else if (ch == '\r') { |
| out += "\\r"; |
| } else if (ch == '\t') { |
| out += "\\t"; |
| } else if (static_cast<uint8_t>(ch) <= 0x1f) { |
| char buf[8]; |
| snprintf(buf, sizeof buf, "\\u%04x", ch); |
| out += buf; |
| } else if (static_cast<uint8_t>(ch) == 0xe2 && static_cast<uint8_t>(value[i+1]) == 0x80 |
| && static_cast<uint8_t>(value[i+2]) == 0xa8) { |
| out += "\\u2028"; |
| i += 2; |
| } else if (static_cast<uint8_t>(ch) == 0xe2 && static_cast<uint8_t>(value[i+1]) == 0x80 |
| && static_cast<uint8_t>(value[i+2]) == 0xa9) { |
| out += "\\u2029"; |
| i += 2; |
| } else { |
| out += ch; |
| } |
| } |
| out += '"'; |
| } |
| |
| static void dump(const Json::array &values, string &out) { |
| bool first = true; |
| out += "["; |
| for (const auto &value : values) { |
| if (!first) |
| out += ", "; |
| value.dump(out); |
| first = false; |
| } |
| out += "]"; |
| } |
| |
| static void dump(const Json::object &values, string &out) { |
| bool first = true; |
| out += "{"; |
| for (const auto &kv : values) { |
| if (!first) |
| out += ", "; |
| dump(kv.first, out); |
| out += ": "; |
| kv.second.dump(out); |
| first = false; |
| } |
| out += "}"; |
| } |
| |
| void Json::dump(string &out) const { |
| m_ptr->dump(out); |
| } |
| |
| /* * * * * * * * * * * * * * * * * * * * |
| * Value wrappers |
| */ |
| |
| template <Json::Type tag, typename T> |
| class Value : public JsonValue { |
| protected: |
| |
| // Constructors |
| explicit Value(const T &value) : m_value(value) {} |
| explicit Value(T &&value) : m_value(move(value)) {} |
| |
| // Get type tag |
| Json::Type type() const override { |
| return tag; |
| } |
| |
| // Comparisons |
| bool equals(const JsonValue * other) const override { |
| return m_value == static_cast<const Value<tag, T> *>(other)->m_value; |
| } |
| bool less(const JsonValue * other) const override { |
| return m_value < static_cast<const Value<tag, T> *>(other)->m_value; |
| } |
| |
| const T m_value; |
| void dump(string &out) const override { json11::dump(m_value, out); } |
| }; |
| |
| class JsonDouble final : public Value<Json::NUMBER, double> { |
| double number_value() const override { return m_value; } |
| int int_value() const override { return static_cast<int>(m_value); } |
| bool equals(const JsonValue * other) const override { return m_value == other->number_value(); } |
| bool less(const JsonValue * other) const override { return m_value < other->number_value(); } |
| public: |
| explicit JsonDouble(double value) : Value(value) {} |
| }; |
| |
| class JsonInt final : public Value<Json::NUMBER, int> { |
| double number_value() const override { return m_value; } |
| int int_value() const override { return m_value; } |
| bool equals(const JsonValue * other) const override { return m_value == other->number_value(); } |
| bool less(const JsonValue * other) const override { return m_value < other->number_value(); } |
| public: |
| explicit JsonInt(int value) : Value(value) {} |
| }; |
| |
| class JsonBoolean final : public Value<Json::BOOL, bool> { |
| bool bool_value() const override { return m_value; } |
| public: |
| explicit JsonBoolean(bool value) : Value(value) {} |
| }; |
| |
| class JsonString final : public Value<Json::STRING, string> { |
| const string &string_value() const override { return m_value; } |
| public: |
| explicit JsonString(const string &value) : Value(value) {} |
| explicit JsonString(string &&value) : Value(move(value)) {} |
| }; |
| |
| class JsonArray final : public Value<Json::ARRAY, Json::array> { |
| const Json::array &array_items() const override { return m_value; } |
| const Json & operator[](size_t i) const override; |
| public: |
| explicit JsonArray(const Json::array &value) : Value(value) {} |
| explicit JsonArray(Json::array &&value) : Value(move(value)) {} |
| }; |
| |
| class JsonObject final : public Value<Json::OBJECT, Json::object> { |
| const Json::object &object_items() const override { return m_value; } |
| const Json & operator[](const string &key) const override; |
| public: |
| explicit JsonObject(const Json::object &value) : Value(value) {} |
| explicit JsonObject(Json::object &&value) : Value(move(value)) {} |
| }; |
| |
| class JsonNull final : public Value<Json::NUL, NullStruct> { |
| public: |
| JsonNull() : Value({}) {} |
| }; |
| |
| /* * * * * * * * * * * * * * * * * * * * |
| * Static globals - static-init-safe |
| */ |
| struct Statics { |
| const std::shared_ptr<JsonValue> null = make_shared<JsonNull>(); |
| const std::shared_ptr<JsonValue> t = make_shared<JsonBoolean>(true); |
| const std::shared_ptr<JsonValue> f = make_shared<JsonBoolean>(false); |
| const string empty_string; |
| const vector<Json> empty_vector; |
| const map<string, Json> empty_map; |
| Statics() {} |
| }; |
| |
| static const Statics & statics() { |
| static const Statics *s = new Statics(); |
| return *s; |
| } |
| |
| static const Json & static_null() { |
| // This has to be separate, not in Statics, because Json() accesses statics().null. |
| static const Json *json_null = new Json(); |
| return *json_null; |
| } |
| |
| /* * * * * * * * * * * * * * * * * * * * |
| * Constructors |
| */ |
| |
| Json::Json() noexcept : m_ptr(statics().null) {} |
| Json::Json(std::nullptr_t) noexcept : m_ptr(statics().null) {} |
| Json::Json(double value) : m_ptr(make_shared<JsonDouble>(value)) {} |
| Json::Json(int value) : m_ptr(make_shared<JsonInt>(value)) {} |
| Json::Json(bool value) : m_ptr(value ? statics().t : statics().f) {} |
| Json::Json(const string &value) : m_ptr(make_shared<JsonString>(value)) {} |
| Json::Json(string &&value) : m_ptr(make_shared<JsonString>(move(value))) {} |
| Json::Json(const char * value) : m_ptr(make_shared<JsonString>(value)) {} |
| Json::Json(const Json::array &values) : m_ptr(make_shared<JsonArray>(values)) {} |
| Json::Json(Json::array &&values) : m_ptr(make_shared<JsonArray>(move(values))) {} |
| Json::Json(const Json::object &values) : m_ptr(make_shared<JsonObject>(values)) {} |
| Json::Json(Json::object &&values) : m_ptr(make_shared<JsonObject>(move(values))) {} |
| |
| /* * * * * * * * * * * * * * * * * * * * |
| * Accessors |
| */ |
| |
| Json::Type Json::type() const { return m_ptr->type(); } |
| double Json::number_value() const { return m_ptr->number_value(); } |
| int Json::int_value() const { return m_ptr->int_value(); } |
| bool Json::bool_value() const { return m_ptr->bool_value(); } |
| const string & Json::string_value() const { return m_ptr->string_value(); } |
| const vector<Json> & Json::array_items() const { return m_ptr->array_items(); } |
| const map<string, Json> & Json::object_items() const { return m_ptr->object_items(); } |
| const Json & Json::operator[] (size_t i) const { return (*m_ptr)[i]; } |
| const Json & Json::operator[] (const string &key) const { return (*m_ptr)[key]; } |
| |
| double JsonValue::number_value() const { return 0; } |
| int JsonValue::int_value() const { return 0; } |
| bool JsonValue::bool_value() const { return false; } |
| const string & JsonValue::string_value() const { return statics().empty_string; } |
| const vector<Json> & JsonValue::array_items() const { return statics().empty_vector; } |
| const map<string, Json> & JsonValue::object_items() const { return statics().empty_map; } |
| const Json & JsonValue::operator[] (size_t) const { return static_null(); } |
| const Json & JsonValue::operator[] (const string &) const { return static_null(); } |
| |
| const Json & JsonObject::operator[] (const string &key) const { |
| auto iter = m_value.find(key); |
| return (iter == m_value.end()) ? static_null() : iter->second; |
| } |
| const Json & JsonArray::operator[] (size_t i) const { |
| if (i >= m_value.size()) return static_null(); |
| else return m_value[i]; |
| } |
| |
| /* * * * * * * * * * * * * * * * * * * * |
| * Comparison |
| */ |
| |
| bool Json::operator== (const Json &other) const { |
| if (m_ptr == other.m_ptr) |
| return true; |
| if (m_ptr->type() != other.m_ptr->type()) |
| return false; |
| |
| return m_ptr->equals(other.m_ptr.get()); |
| } |
| |
| bool Json::operator< (const Json &other) const { |
| if (m_ptr == other.m_ptr) |
| return false; |
| if (m_ptr->type() != other.m_ptr->type()) |
| return m_ptr->type() < other.m_ptr->type(); |
| |
| return m_ptr->less(other.m_ptr.get()); |
| } |
| |
| /* * * * * * * * * * * * * * * * * * * * |
| * Parsing |
| */ |
| |
| /* esc(c) |
| * |
| * Format char c suitable for printing in an error message. |
| */ |
| static inline string esc(char c) { |
| char buf[12]; |
| if (static_cast<uint8_t>(c) >= 0x20 && static_cast<uint8_t>(c) <= 0x7f) { |
| snprintf(buf, sizeof buf, "'%c' (%d)", c, c); |
| } else { |
| snprintf(buf, sizeof buf, "(%d)", c); |
| } |
| return string(buf); |
| } |
| |
| static inline bool in_range(long x, long lower, long upper) { |
| return (x >= lower && x <= upper); |
| } |
| |
| namespace { |
| /* JsonParser |
| * |
| * Object that tracks all state of an in-progress parse. |
| */ |
| struct JsonParser final { |
| |
| /* State |
| */ |
| const string &str; |
| size_t i; |
| string &err; |
| bool failed; |
| const JsonParse strategy; |
| |
| /* fail(msg, err_ret = Json()) |
| * |
| * Mark this parse as failed. |
| */ |
| Json fail(string &&msg) { |
| return fail(move(msg), Json()); |
| } |
| |
| template <typename T> |
| T fail(string &&msg, const T err_ret) { |
| if (!failed) |
| err = std::move(msg); |
| failed = true; |
| return err_ret; |
| } |
| |
| /* consume_whitespace() |
| * |
| * Advance until the current character is non-whitespace. |
| */ |
| void consume_whitespace() { |
| while (str[i] == ' ' || str[i] == '\r' || str[i] == '\n' || str[i] == '\t') |
| i++; |
| } |
| |
| /* consume_comment() |
| * |
| * Advance comments (c-style inline and multiline). |
| */ |
| bool consume_comment() { |
| bool comment_found = false; |
| if (str[i] == '/') { |
| i++; |
| if (i == str.size()) |
| return fail("unexpected end of input after start of comment", false); |
| if (str[i] == '/') { // inline comment |
| i++; |
| // advance until next line, or end of input |
| while (i < str.size() && str[i] != '\n') { |
| i++; |
| } |
| comment_found = true; |
| } |
| else if (str[i] == '*') { // multiline comment |
| i++; |
| if (i > str.size()-2) |
| return fail("unexpected end of input inside multi-line comment", false); |
| // advance until closing tokens |
| while (!(str[i] == '*' && str[i+1] == '/')) { |
| i++; |
| if (i > str.size()-2) |
| return fail( |
| "unexpected end of input inside multi-line comment", false); |
| } |
| i += 2; |
| comment_found = true; |
| } |
| else |
| return fail("malformed comment", false); |
| } |
| return comment_found; |
| } |
| |
| /* consume_garbage() |
| * |
| * Advance until the current character is non-whitespace and non-comment. |
| */ |
| void consume_garbage() { |
| consume_whitespace(); |
| if(strategy == JsonParse::COMMENTS) { |
| bool comment_found = false; |
| do { |
| comment_found = consume_comment(); |
| if (failed) return; |
| consume_whitespace(); |
| } |
| while(comment_found); |
| } |
| } |
| |
| /* get_next_token() |
| * |
| * Return the next non-whitespace character. If the end of the input is reached, |
| * flag an error and return 0. |
| */ |
| char get_next_token() { |
| consume_garbage(); |
| if (failed) return (char)0; |
| if (i == str.size()) |
| return fail("unexpected end of input", (char)0); |
| |
| return str[i++]; |
| } |
| |
| /* encode_utf8(pt, out) |
| * |
| * Encode pt as UTF-8 and add it to out. |
| */ |
| void encode_utf8(long pt, string & out) { |
| if (pt < 0) |
| return; |
| |
| if (pt < 0x80) { |
| out += static_cast<char>(pt); |
| } else if (pt < 0x800) { |
| out += static_cast<char>((pt >> 6) | 0xC0); |
| out += static_cast<char>((pt & 0x3F) | 0x80); |
| } else if (pt < 0x10000) { |
| out += static_cast<char>((pt >> 12) | 0xE0); |
| out += static_cast<char>(((pt >> 6) & 0x3F) | 0x80); |
| out += static_cast<char>((pt & 0x3F) | 0x80); |
| } else { |
| out += static_cast<char>((pt >> 18) | 0xF0); |
| out += static_cast<char>(((pt >> 12) & 0x3F) | 0x80); |
| out += static_cast<char>(((pt >> 6) & 0x3F) | 0x80); |
| out += static_cast<char>((pt & 0x3F) | 0x80); |
| } |
| } |
| |
| /* parse_string() |
| * |
| * Parse a string, starting at the current position. |
| */ |
| string parse_string() { |
| string out; |
| long last_escaped_codepoint = -1; |
| while (true) { |
| if (i == str.size()) |
| return fail("unexpected end of input in string", ""); |
| |
| char ch = str[i++]; |
| |
| if (ch == '"') { |
| encode_utf8(last_escaped_codepoint, out); |
| return out; |
| } |
| |
| if (in_range(ch, 0, 0x1f)) |
| return fail("unescaped " + esc(ch) + " in string", ""); |
| |
| // The usual case: non-escaped characters |
| if (ch != '\\') { |
| encode_utf8(last_escaped_codepoint, out); |
| last_escaped_codepoint = -1; |
| out += ch; |
| continue; |
| } |
| |
| // Handle escapes |
| if (i == str.size()) |
| return fail("unexpected end of input in string", ""); |
| |
| ch = str[i++]; |
| |
| if (ch == 'u') { |
| // Extract 4-byte escape sequence |
| string esc = str.substr(i, 4); |
| // Explicitly check length of the substring. The following loop |
| // relies on std::string returning the terminating NUL when |
| // accessing str[length]. Checking here reduces brittleness. |
| if (esc.length() < 4) { |
| return fail("bad \\u escape: " + esc, ""); |
| } |
| for (size_t j = 0; j < 4; j++) { |
| if (!in_range(esc[j], 'a', 'f') && !in_range(esc[j], 'A', 'F') |
| && !in_range(esc[j], '0', '9')) |
| return fail("bad \\u escape: " + esc, ""); |
| } |
| |
| long codepoint = strtol(esc.data(), nullptr, 16); |
| |
| // JSON specifies that characters outside the BMP shall be encoded as a pair |
| // of 4-hex-digit \u escapes encoding their surrogate pair components. Check |
| // whether we're in the middle of such a beast: the previous codepoint was an |
| // escaped lead (high) surrogate, and this is a trail (low) surrogate. |
| if (in_range(last_escaped_codepoint, 0xD800, 0xDBFF) |
| && in_range(codepoint, 0xDC00, 0xDFFF)) { |
| // Reassemble the two surrogate pairs into one astral-plane character, per |
| // the UTF-16 algorithm. |
| encode_utf8((((last_escaped_codepoint - 0xD800) << 10) |
| | (codepoint - 0xDC00)) + 0x10000, out); |
| last_escaped_codepoint = -1; |
| } else { |
| encode_utf8(last_escaped_codepoint, out); |
| last_escaped_codepoint = codepoint; |
| } |
| |
| i += 4; |
| continue; |
| } |
| |
| encode_utf8(last_escaped_codepoint, out); |
| last_escaped_codepoint = -1; |
| |
| if (ch == 'b') { |
| out += '\b'; |
| } else if (ch == 'f') { |
| out += '\f'; |
| } else if (ch == 'n') { |
| out += '\n'; |
| } else if (ch == 'r') { |
| out += '\r'; |
| } else if (ch == 't') { |
| out += '\t'; |
| } else if (ch == '"' || ch == '\\' || ch == '/') { |
| out += ch; |
| } else { |
| return fail("invalid escape character " + esc(ch), ""); |
| } |
| } |
| } |
| |
| /* parse_number() |
| * |
| * Parse a double. |
| */ |
| Json parse_number() { |
| size_t start_pos = i; |
| |
| if (str[i] == '-') |
| i++; |
| |
| // Integer part |
| if (str[i] == '0') { |
| i++; |
| if (in_range(str[i], '0', '9')) |
| return fail("leading 0s not permitted in numbers"); |
| } else if (in_range(str[i], '1', '9')) { |
| i++; |
| while (in_range(str[i], '0', '9')) |
| i++; |
| } else { |
| return fail("invalid " + esc(str[i]) + " in number"); |
| } |
| |
| if (str[i] != '.' && str[i] != 'e' && str[i] != 'E' |
| && (i - start_pos) <= static_cast<size_t>(std::numeric_limits<int>::digits10)) { |
| return std::atoi(str.c_str() + start_pos); |
| } |
| |
| // Decimal part |
| if (str[i] == '.') { |
| i++; |
| if (!in_range(str[i], '0', '9')) |
| return fail("at least one digit required in fractional part"); |
| |
| while (in_range(str[i], '0', '9')) |
| i++; |
| } |
| |
| // Exponent part |
| if (str[i] == 'e' || str[i] == 'E') { |
| i++; |
| |
| if (str[i] == '+' || str[i] == '-') |
| i++; |
| |
| if (!in_range(str[i], '0', '9')) |
| return fail("at least one digit required in exponent"); |
| |
| while (in_range(str[i], '0', '9')) |
| i++; |
| } |
| |
| return std::strtod(str.c_str() + start_pos, nullptr); |
| } |
| |
| /* expect(str, res) |
| * |
| * Expect that 'str' starts at the character that was just read. If it does, advance |
| * the input and return res. If not, flag an error. |
| */ |
| Json expect(const string &expected, Json res) { |
| assert(i != 0); |
| i--; |
| if (str.compare(i, expected.length(), expected) == 0) { |
| i += expected.length(); |
| return res; |
| } else { |
| return fail("parse error: expected " + expected + ", got " + str.substr(i, expected.length())); |
| } |
| } |
| |
| /* parse_json() |
| * |
| * Parse a JSON object. |
| */ |
| Json parse_json(int depth) { |
| if (depth > max_depth) { |
| return fail("exceeded maximum nesting depth"); |
| } |
| |
| char ch = get_next_token(); |
| if (failed) |
| return Json(); |
| |
| if (ch == '-' || (ch >= '0' && ch <= '9')) { |
| i--; |
| return parse_number(); |
| } |
| |
| if (ch == 't') |
| return expect("true", true); |
| |
| if (ch == 'f') |
| return expect("false", false); |
| |
| if (ch == 'n') |
| return expect("null", Json()); |
| |
| if (ch == '"') |
| return parse_string(); |
| |
| if (ch == '{') { |
| map<string, Json> data; |
| ch = get_next_token(); |
| if (ch == '}') |
| return data; |
| |
| while (1) { |
| if (ch != '"') |
| return fail("expected '\"' in object, got " + esc(ch)); |
| |
| string key = parse_string(); |
| if (failed) |
| return Json(); |
| |
| ch = get_next_token(); |
| if (ch != ':') |
| return fail("expected ':' in object, got " + esc(ch)); |
| |
| data[std::move(key)] = parse_json(depth + 1); |
| if (failed) |
| return Json(); |
| |
| ch = get_next_token(); |
| if (ch == '}') |
| break; |
| if (ch != ',') |
| return fail("expected ',' in object, got " + esc(ch)); |
| |
| ch = get_next_token(); |
| } |
| return data; |
| } |
| |
| if (ch == '[') { |
| vector<Json> data; |
| ch = get_next_token(); |
| if (ch == ']') |
| return data; |
| |
| while (1) { |
| i--; |
| data.push_back(parse_json(depth + 1)); |
| if (failed) |
| return Json(); |
| |
| ch = get_next_token(); |
| if (ch == ']') |
| break; |
| if (ch != ',') |
| return fail("expected ',' in list, got " + esc(ch)); |
| |
| ch = get_next_token(); |
| (void)ch; |
| } |
| return data; |
| } |
| |
| return fail("expected value, got " + esc(ch)); |
| } |
| }; |
| }//namespace { |
| |
| Json Json::parse(const string &in, string &err, JsonParse strategy) { |
| JsonParser parser { in, 0, err, false, strategy }; |
| Json result = parser.parse_json(0); |
| |
| // Check for any trailing garbage |
| parser.consume_garbage(); |
| if (parser.failed) |
| return Json(); |
| if (parser.i != in.size()) |
| return parser.fail("unexpected trailing " + esc(in[parser.i])); |
| |
| return result; |
| } |
| |
| // Documented in json11.hpp |
| vector<Json> Json::parse_multi(const string &in, |
| std::string::size_type &parser_stop_pos, |
| string &err, |
| JsonParse strategy) { |
| JsonParser parser { in, 0, err, false, strategy }; |
| parser_stop_pos = 0; |
| vector<Json> json_vec; |
| while (parser.i != in.size() && !parser.failed) { |
| json_vec.push_back(parser.parse_json(0)); |
| if (parser.failed) |
| break; |
| |
| // Check for another object |
| parser.consume_garbage(); |
| if (parser.failed) |
| break; |
| parser_stop_pos = parser.i; |
| } |
| return json_vec; |
| } |
| |
| /* * * * * * * * * * * * * * * * * * * * |
| * Shape-checking |
| */ |
| |
| bool Json::has_shape(const shape & types, string & err) const { |
| if (!is_object()) { |
| err = "expected JSON object, got " + dump(); |
| return false; |
| } |
| |
| for (auto & item : types) { |
| if ((*this)[item.first].type() != item.second) { |
| err = "bad type for " + item.first + " in " + dump(); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| } // namespace json11 |