more on #290

README.md

@@ -511,7 +511,7 @@ To compile and run the tests, you need to execute
 $ make check
 
 ===============================================================================
-All tests passed (8905099 assertions in 32 test cases)
+All tests passed (8905119 assertions in 32 test cases)
 ```
 
 For more information, have a look at the file [.travis.yml](https://github.com/nlohmann/json/blob/master/.travis.yml).

doc/examples/parse__array__parser_callback_t.cpp

@@ -0,0 +1,28 @@
+#include <json.hpp>
+
+using json = nlohmann::json;
+
+int main()
+{
+    // a JSON text
+    char text[] = R"(
+    {
+        "Image": {
+            "Width":  800,
+            "Height": 600,
+            "Title":  "View from 15th Floor",
+            "Thumbnail": {
+                "Url":    "http://www.example.com/image/481989943",
+                "Height": 125,
+                "Width":  100
+            },
+            "Animated" : false,
+            "IDs": [116, 943, 234, 38793]
+        }
+    }
+    )";
+
+    // parse and serialize JSON
+    json j_complete = json::parse(text);
+    std::cout << std::setw(4) << j_complete << "\n\n";
+}

doc/examples/parse__array__parser_callback_t.link

@@ -0,0 +1 @@
+<a target="_blank" href="http://melpon.org/wandbox/permlink/LvZQq5fybVH1nh9L"><b>online</b></a>

doc/examples/parse__array__parser_callback_t.output

@@ -0,0 +1,20 @@
+{
+    "Image": {
+        "Animated": false,
+        "Height": 600,
+        "IDs": [
+            116,
+            943,
+            234,
+            38793
+        ],
+        "Thumbnail": {
+            "Height": 125,
+            "Url": "http://www.example.com/image/481989943",
+            "Width": 100
+        },
+        "Title": "View from 15th Floor",
+        "Width": 800
+    }
+}
+

doc/examples/parse__contiguouscontainer__parser_callback_t.cpp

@@ -0,0 +1,13 @@
+#include <json.hpp>
+
+using json = nlohmann::json;
+
+int main()
+{
+    // a JSON text given as std::vector
+    std::vector<uint8_t> text = {'[', '1', ',', '2', ',', '3', ']', '\0'};
+
+    // parse and serialize JSON
+    json j_complete = json::parse(text);
+    std::cout << std::setw(4) << j_complete << "\n\n";
+}

doc/examples/parse__contiguouscontainer__parser_callback_t.link

@@ -0,0 +1 @@
+<a target="_blank" href="http://melpon.org/wandbox/permlink/F8VaVFyys87qQRt5"><b>online</b></a>

doc/examples/parse__contiguouscontainer__parser_callback_t.output

@@ -0,0 +1,6 @@
+[
+    1,
+    2,
+    3
+]
+

doc/examples/parse__iteratortype__parser_callback_t.cpp

@@ -0,0 +1,13 @@
+#include <json.hpp>
+
+using json = nlohmann::json;
+
+int main()
+{
+    // a JSON text given as std::vector
+    std::vector<uint8_t> text = {'[', '1', ',', '2', ',', '3', ']', '\0'};
+
+    // parse and serialize JSON
+    json j_complete = json::parse(text.begin(), text.end());
+    std::cout << std::setw(4) << j_complete << "\n\n";
+}

doc/examples/parse__iteratortype__parser_callback_t.link

@@ -0,0 +1 @@
+<a target="_blank" href="http://melpon.org/wandbox/permlink/ojh4Eeol4G9RgeRV"><b>online</b></a>

doc/examples/parse__iteratortype__parser_callback_t.output

@@ -0,0 +1,6 @@
+[
+    1,
+    2,
+    3
+]
+

doc/examples/parse__string__parser_callback_t.cpp

@@ -5,7 +5,7 @@ using json = nlohmann::json;
 int main()
 {
     // a JSON text
-    std::string text = R"(
+    auto text = R"(
     {
         "Image": {
             "Width":  800,

doc/examples/parse__string__parser_callback_t.link

@@ -1 +1 @@
-<a target="_blank" href="http://melpon.org/wandbox/permlink/SrKpkE9ivmvd2OUy"><b>online</b></a>
+<a target="_blank" href="http://melpon.org/wandbox/permlink/n888UNQlMFduURhE"><b>online</b></a>

src/json.hpp

@@ -951,7 +951,7 @@ class basic_json
 
     With a parser callback function, the result of parsing a JSON text can be
     influenced. When passed to @ref parse(std::istream&, const
-    parser_callback_t) or @ref parse(const string_t&, const parser_callback_t),
+    parser_callback_t) or @ref parse(const char*, const parser_callback_t),
     it is called on certain events (passed as @ref parse_event_t via parameter
     @a event) with a set recursion depth @a depth and context JSON value
     @a parsed. The return value of the callback function is a boolean
@@ -994,7 +994,7 @@ class basic_json
     skipped completely or replaced by an empty discarded object.
 
     @sa @ref parse(std::istream&, parser_callback_t) or
-    @ref parse(const string_t&, parser_callback_t) for examples
+    @ref parse(const char*, parser_callback_t) for examples
 
     @since version 1.0.0
     */
@@ -5933,9 +5933,9 @@ class basic_json
     /// @{
 
     /*!
-    @brief deserialize from string
+    @brief deserialize from string literal
 
-    @param[in] s  string to read a serialized JSON value from
+    @param[in] s  string literal to read a serialized JSON value from
     @param[in] cb a parser callback function of type @ref parser_callback_t
     which is used to control the deserialization by filtering unwanted values
     (optional)
@@ -5947,6 +5947,8 @@ class basic_json
     @a cb has a super-linear complexity.
 
     @note A UTF-8 byte order mark is silently ignored.
+    @note String containers like `std::string` or @ref string_t can be parsed
+          with @ref parse(const ContiguousContainer&, const parser_callback_t)
 
     @liveexample{The example below demonstrates the `parse()` function with
     and without callback function.,parse__string__parser_callback_t}
@@ -5954,24 +5956,47 @@ class basic_json
     @sa @ref parse(std::istream&, const parser_callback_t) for a version that
     reads from an input stream
 
-    @since version 1.0.0
+    @since version 1.0.0 (originally for @ref string_t)
     */
-    /*
+    static basic_json parse(const char* s,
-    static basic_json parse(const string_t& s,
                             const parser_callback_t cb = nullptr)
     {
         return parser(s, cb).parse();
     }
-    */
 
     /*!
-    @brief deserialize from string literal
+    @brief deserialize from an array
-    @copydoc parse(const string_t&, const parser_callback_t)
+
+    This function reads from an array of 1-byte values.
+
+    @pre Each element of the container has a size of 1 byte. Violating this
+    precondition yields undefined behavior. **This precondition is enforced
+    with a static assertion.**
+
+    @param[in] array  array to read from
+    @param[in] cb  a parser callback function of type @ref parser_callback_t
+    which is used to control the deserialization by filtering unwanted values
+    (optional)
+
+    @return result of the deserialization
+
+    @complexity Linear in the length of the input. The parser is a predictive
+    LL(1) parser. The complexity can be higher if the parser callback function
+    @a cb has a super-linear complexity.
+
+    @note A UTF-8 byte order mark is silently ignored.
+
+    @liveexample{The example below demonstrates the `parse()` function reading
+    from an array.,parse__array__parser_callback_t}
+
+    @since version 2.0.3
     */
-    static basic_json parse(const typename string_t::value_type* s,
+    template<class T, std::size_t N>
+    static basic_json parse(T (&array)[N],
                             const parser_callback_t cb = nullptr)
     {
-        return parser(s, cb).parse();
+        // delegate the call to the iterator-range parse overload
+        return parse(std::begin(array), std::end(array), cb);
     }
 
     /*!
@@ -5993,7 +6018,7 @@ class basic_json
     @liveexample{The example below demonstrates the `parse()` function with
     and without callback function.,parse__istream__parser_callback_t}
 
-    @sa @ref parse(const string_t&, const parser_callback_t) for a version
+    @sa @ref parse(const char*, const parser_callback_t) for a version
     that reads from a string
 
     @since version 1.0.0
@@ -6014,7 +6039,7 @@ class basic_json
     }
 
     /*!
-    @brief deserialize from a iterator range with contiguous storage
+    @brief deserialize from an iterator range with contiguous storage
 
     This function reads from an iterator range of a container with contiguous
     storage of 1-byte values. Compatible container types include
@@ -6029,13 +6054,14 @@ class basic_json
     precondition yields undefined behavior. **This precondition is enforced
     with a static assertion.**
 
-    @warning There is no way to enforce the preconditions at compile-time. If
+    @warning There is no way to enforce all preconditions at compile-time. If
-             the function is called with noncompliant iterators, the behavior
+             the function is called with noncompliant iterators and with
-             is undefined and will most liekely yield segmentation violation.
+             assertions switched off, the behavior is undefined and will most
+             likely yield segmentation violation.
 
-    @param[in] first begin of the range to parse (included)
+    @param[in] first  begin of the range to parse (included)
-    @param[in] last end of the range to parse (excluded)
+    @param[in] last  end of the range to parse (excluded)
-    @param[in] cb a parser callback function of type @ref parser_callback_t
+    @param[in] cb  a parser callback function of type @ref parser_callback_t
     which is used to control the deserialization by filtering unwanted values
     (optional)
 
@@ -6047,7 +6073,8 @@ class basic_json
 
     @note A UTF-8 byte order mark is silently ignored.
 
-    @todo Example and references.
+    @liveexample{The example below demonstrates the `parse()` function reading
+    from an iterator range.,parse__iteratortype__parser_callback_t}
 
     @since version 2.0.3
     */
@@ -6084,6 +6111,45 @@ class basic_json
         return parser(first, last, cb).parse();
     }
 
+    /*!
+    @brief deserialize from a container with contiguous storage
+
+    This function reads from a container with contiguous storage of 1-byte
+    values. Compatible container types include `std::vector`, `std::string`,
+    `std::array`, and `std::initializer_list`. User-defined containers can be
+    used as long as they implement random-access iterators and a contiguous
+    storage.
+
+    @pre The container storage is contiguous. Violating this precondition
+    yields undefined behavior. **This precondition is enforced with an
+    assertion.**
+    @pre Each element of the container has a size of 1 byte. Violating this
+    precondition yields undefined behavior. **This precondition is enforced
+    with a static assertion.**
+
+    @warning There is no way to enforce all preconditions at compile-time. If
+             the function is called with a noncompliant container and with
+             assertions switched off, the behavior is undefined and will most
+             likely yield segmentation violation.
+
+    @param[in] c  container to read from
+    @param[in] cb  a parser callback function of type @ref parser_callback_t
+    which is used to control the deserialization by filtering unwanted values
+    (optional)
+
+    @return result of the deserialization
+
+    @complexity Linear in the length of the input. The parser is a predictive
+    LL(1) parser. The complexity can be higher if the parser callback function
+    @a cb has a super-linear complexity.
+
+    @note A UTF-8 byte order mark is silently ignored.
+
+    @liveexample{The example below demonstrates the `parse()` function reading
+    from a contiguous container.,parse__contiguouscontainer__parser_callback_t}
+
+    @since version 2.0.3
+    */
     template<class ContiguousContainer, typename
              std::enable_if<
                  std::is_base_of<
@@ -6097,14 +6163,6 @@ class basic_json
         return parse(std::begin(c), std::end(c), cb);
     }
 
-    template<class T, std::size_t N>
-    static basic_json parse(T (&array)[N],
-                            const parser_callback_t cb = nullptr)
-    {
-        // delegate the call to the iterator-range parse overload
-        return parse(std::begin(array), std::end(array), cb);
-    }
-
     /*!
     @brief deserialize from stream
 
@@ -6158,7 +6216,7 @@ class basic_json
     Returns the type name as string to be used in error messages - usually to
     indicate that a function was called on a wrong JSON type.
 
-    @return basically a string representation of a the @ref m_type member
+    @return basically a string representation of a the @a m_type member
 
     @complexity Constant.
 
@@ -7626,7 +7684,7 @@ class basic_json
             fill_line_buffer();
         }
 
-        // switch off unwanted functions
+        // switch off unwanted functions (due to pointer members)
         lexer() = delete;
         lexer(const lexer&) = delete;
         lexer operator=(const lexer&) = delete;
@@ -8979,24 +9037,17 @@ basic_json_parser_63:
     {
       public:
         /// a parser reading from a string literal
-        parser(const typename string_t::value_type* buff,
+        parser(const char* buff, const parser_callback_t cb = nullptr)
-               const parser_callback_t cb = nullptr)
             : callback(cb),
               m_lexer(reinterpret_cast<const typename lexer::lexer_char_t*>(buff), strlen(buff))
         {}
 
-        /// a parser reading from a string container
-        parser(const string_t& s, const parser_callback_t cb = nullptr)
-            : callback(cb),
-              m_lexer(reinterpret_cast<const typename lexer::lexer_char_t*>(s.c_str()), s.size())
-        {}
-
         /// a parser reading from an input stream
         parser(std::istream& is, const parser_callback_t cb = nullptr)
             : callback(cb), m_lexer(is)
         {}
 
-        /// a parser reading from a container with contiguous storage
+        /// a parser reading from an iterator range with contiguous storage
         template <class IteratorType, typename
                   std::enable_if<
                       std::is_same<typename std::iterator_traits<IteratorType>::iterator_category, std::random_access_iterator_tag>::value
@@ -10560,7 +10611,7 @@ if no parse error occurred.
 */
 inline nlohmann::json operator "" _json(const char* s, std::size_t)
 {
-    return nlohmann::json::parse(reinterpret_cast<const nlohmann::json::string_t::value_type*>(s));
+    return nlohmann::json::parse(s);
 }
 
 /*!

src/json.hpp.re2c

@@ -951,7 +951,7 @@ class basic_json
 
     With a parser callback function, the result of parsing a JSON text can be
     influenced. When passed to @ref parse(std::istream&, const
-    parser_callback_t) or @ref parse(const string_t&, const parser_callback_t),
+    parser_callback_t) or @ref parse(const char*, const parser_callback_t),
     it is called on certain events (passed as @ref parse_event_t via parameter
     @a event) with a set recursion depth @a depth and context JSON value
     @a parsed. The return value of the callback function is a boolean
@@ -994,7 +994,7 @@ class basic_json
     skipped completely or replaced by an empty discarded object.
 
     @sa @ref parse(std::istream&, parser_callback_t) or
-    @ref parse(const string_t&, parser_callback_t) for examples
+    @ref parse(const char*, parser_callback_t) for examples
 
     @since version 1.0.0
     */
@@ -5933,9 +5933,9 @@ class basic_json
     /// @{
 
     /*!
-    @brief deserialize from string
+    @brief deserialize from string literal
 
-    @param[in] s  string to read a serialized JSON value from
+    @param[in] s  string literal to read a serialized JSON value from
     @param[in] cb a parser callback function of type @ref parser_callback_t
     which is used to control the deserialization by filtering unwanted values
     (optional)
@@ -5947,6 +5947,8 @@ class basic_json
     @a cb has a super-linear complexity.
 
     @note A UTF-8 byte order mark is silently ignored.
+    @note String containers like `std::string` or @ref string_t can be parsed
+          with @ref parse(const ContiguousContainer&, const parser_callback_t)
 
     @liveexample{The example below demonstrates the `parse()` function with
     and without callback function.,parse__string__parser_callback_t}
@@ -5954,24 +5956,47 @@ class basic_json
     @sa @ref parse(std::istream&, const parser_callback_t) for a version that
     reads from an input stream
 
-    @since version 1.0.0
+    @since version 1.0.0 (originally for @ref string_t)
     */
-    /*
+    static basic_json parse(const char* s,
-    static basic_json parse(const string_t& s,
                             const parser_callback_t cb = nullptr)
     {
         return parser(s, cb).parse();
     }
-    */
 
     /*!
-    @brief deserialize from string literal
+    @brief deserialize from an array
-    @copydoc parse(const string_t&, const parser_callback_t)
+
+    This function reads from an array of 1-byte values.
+
+    @pre Each element of the container has a size of 1 byte. Violating this
+    precondition yields undefined behavior. **This precondition is enforced
+    with a static assertion.**
+
+    @param[in] array  array to read from
+    @param[in] cb  a parser callback function of type @ref parser_callback_t
+    which is used to control the deserialization by filtering unwanted values
+    (optional)
+
+    @return result of the deserialization
+
+    @complexity Linear in the length of the input. The parser is a predictive
+    LL(1) parser. The complexity can be higher if the parser callback function
+    @a cb has a super-linear complexity.
+
+    @note A UTF-8 byte order mark is silently ignored.
+
+    @liveexample{The example below demonstrates the `parse()` function reading
+    from an array.,parse__array__parser_callback_t}
+
+    @since version 2.0.3
     */
-    static basic_json parse(const typename string_t::value_type* s,
+    template<class T, std::size_t N>
+    static basic_json parse(T (&array)[N],
                             const parser_callback_t cb = nullptr)
     {
-        return parser(s, cb).parse();
+        // delegate the call to the iterator-range parse overload
+        return parse(std::begin(array), std::end(array), cb);
     }
 
     /*!
@@ -5993,7 +6018,7 @@ class basic_json
     @liveexample{The example below demonstrates the `parse()` function with
     and without callback function.,parse__istream__parser_callback_t}
 
-    @sa @ref parse(const string_t&, const parser_callback_t) for a version
+    @sa @ref parse(const char*, const parser_callback_t) for a version
     that reads from a string
 
     @since version 1.0.0
@@ -6014,7 +6039,7 @@ class basic_json
     }
 
     /*!
-    @brief deserialize from a iterator range with contiguous storage
+    @brief deserialize from an iterator range with contiguous storage
 
     This function reads from an iterator range of a container with contiguous
     storage of 1-byte values. Compatible container types include
@@ -6029,13 +6054,14 @@ class basic_json
     precondition yields undefined behavior. **This precondition is enforced
     with a static assertion.**
 
-    @warning There is no way to enforce the preconditions at compile-time. If
+    @warning There is no way to enforce all preconditions at compile-time. If
-             the function is called with noncompliant iterators, the behavior
+             the function is called with noncompliant iterators and with
-             is undefined and will most liekely yield segmentation violation.
+             assertions switched off, the behavior is undefined and will most
+             likely yield segmentation violation.
 
-    @param[in] first begin of the range to parse (included)
+    @param[in] first  begin of the range to parse (included)
-    @param[in] last end of the range to parse (excluded)
+    @param[in] last  end of the range to parse (excluded)
-    @param[in] cb a parser callback function of type @ref parser_callback_t
+    @param[in] cb  a parser callback function of type @ref parser_callback_t
     which is used to control the deserialization by filtering unwanted values
     (optional)
 
@@ -6047,7 +6073,8 @@ class basic_json
 
     @note A UTF-8 byte order mark is silently ignored.
 
-    @todo Example and references.
+    @liveexample{The example below demonstrates the `parse()` function reading
+    from an iterator range.,parse__iteratortype__parser_callback_t}
 
     @since version 2.0.3
     */
@@ -6084,6 +6111,45 @@ class basic_json
         return parser(first, last, cb).parse();
     }
 
+    /*!
+    @brief deserialize from a container with contiguous storage
+
+    This function reads from a container with contiguous storage of 1-byte
+    values. Compatible container types include `std::vector`, `std::string`,
+    `std::array`, and `std::initializer_list`. User-defined containers can be
+    used as long as they implement random-access iterators and a contiguous
+    storage.
+
+    @pre The container storage is contiguous. Violating this precondition
+    yields undefined behavior. **This precondition is enforced with an
+    assertion.**
+    @pre Each element of the container has a size of 1 byte. Violating this
+    precondition yields undefined behavior. **This precondition is enforced
+    with a static assertion.**
+
+    @warning There is no way to enforce all preconditions at compile-time. If
+             the function is called with a noncompliant container and with
+             assertions switched off, the behavior is undefined and will most
+             likely yield segmentation violation.
+
+    @param[in] c  container to read from
+    @param[in] cb  a parser callback function of type @ref parser_callback_t
+    which is used to control the deserialization by filtering unwanted values
+    (optional)
+
+    @return result of the deserialization
+
+    @complexity Linear in the length of the input. The parser is a predictive
+    LL(1) parser. The complexity can be higher if the parser callback function
+    @a cb has a super-linear complexity.
+
+    @note A UTF-8 byte order mark is silently ignored.
+
+    @liveexample{The example below demonstrates the `parse()` function reading
+    from a contiguous container.,parse__contiguouscontainer__parser_callback_t}
+
+    @since version 2.0.3
+    */
     template<class ContiguousContainer, typename
              std::enable_if<
                  std::is_base_of<
@@ -6097,14 +6163,6 @@ class basic_json
         return parse(std::begin(c), std::end(c), cb);
     }
 
-    template<class T, std::size_t N>
-    static basic_json parse(T (&array)[N],
-                            const parser_callback_t cb = nullptr)
-    {
-        // delegate the call to the iterator-range parse overload
-        return parse(std::begin(array), std::end(array), cb);
-    }
-
     /*!
     @brief deserialize from stream
 
@@ -6158,7 +6216,7 @@ class basic_json
     Returns the type name as string to be used in error messages - usually to
     indicate that a function was called on a wrong JSON type.
 
-    @return basically a string representation of a the @ref m_type member
+    @return basically a string representation of a the @a m_type member
 
     @complexity Constant.
 
@@ -7626,7 +7684,7 @@ class basic_json
             fill_line_buffer();
         }
 
-        // switch off unwanted functions
+        // switch off unwanted functions (due to pointer members)
         lexer() = delete;
         lexer(const lexer&) = delete;
         lexer operator=(const lexer&) = delete;
@@ -8276,24 +8334,17 @@ class basic_json
     {
       public:
         /// a parser reading from a string literal
-        parser(const typename string_t::value_type* buff,
+        parser(const char* buff, const parser_callback_t cb = nullptr)
-               const parser_callback_t cb = nullptr)
             : callback(cb),
               m_lexer(reinterpret_cast<const typename lexer::lexer_char_t*>(buff), strlen(buff))
         {}
 
-        /// a parser reading from a string container
-        parser(const string_t& s, const parser_callback_t cb = nullptr)
-            : callback(cb),
-              m_lexer(reinterpret_cast<const typename lexer::lexer_char_t*>(s.c_str()), s.size())
-        {}
-
         /// a parser reading from an input stream
         parser(std::istream& is, const parser_callback_t cb = nullptr)
             : callback(cb), m_lexer(is)
         {}
 
-        /// a parser reading from a container with contiguous storage
+        /// a parser reading from an iterator range with contiguous storage
         template <class IteratorType, typename
                   std::enable_if<
                       std::is_same<typename std::iterator_traits<IteratorType>::iterator_category, std::random_access_iterator_tag>::value
@@ -9857,7 +9908,7 @@ if no parse error occurred.
 */
 inline nlohmann::json operator "" _json(const char* s, std::size_t)
 {
-    return nlohmann::json::parse(reinterpret_cast<const nlohmann::json::string_t::value_type*>(s));
+    return nlohmann::json::parse(s);
 }
 
 /*!

test/src/unit-class_parser.cpp

@@ -477,7 +477,7 @@ TEST_CASE("parser class")
                 case ('r'):
                 case ('t'):
                 {
-                    CHECK_NOTHROW(json::parser(s).parse());
+                    CHECK_NOTHROW(json::parser(s.c_str()).parse());
                     break;
                 }
 
@@ -490,8 +490,8 @@ TEST_CASE("parser class")
                 // any other combination of backslash and character is invalid
                 default:
                 {
-                    CHECK_THROWS_AS(json::parser(s).parse(), std::invalid_argument);
+                    CHECK_THROWS_AS(json::parser(s.c_str()).parse(), std::invalid_argument);
-                    CHECK_THROWS_WITH(json::parser(s).parse(), "parse error - unexpected '\"'");
+                    CHECK_THROWS_WITH(json::parser(s.c_str()).parse(), "parse error - unexpected '\"'");
                     break;
                 }
             }
@@ -549,22 +549,22 @@ TEST_CASE("parser class")
 
                 if (valid(c))
                 {
-                    CHECK_NOTHROW(json::parser(s1).parse());
+                    CHECK_NOTHROW(json::parser(s1.c_str()).parse());
-                    CHECK_NOTHROW(json::parser(s2).parse());
+                    CHECK_NOTHROW(json::parser(s2.c_str()).parse());
-                    CHECK_NOTHROW(json::parser(s3).parse());
+                    CHECK_NOTHROW(json::parser(s3.c_str()).parse());
-                    CHECK_NOTHROW(json::parser(s4).parse());
+                    CHECK_NOTHROW(json::parser(s4.c_str()).parse());
                 }
                 else
                 {
-                    CHECK_THROWS_AS(json::parser(s1).parse(), std::invalid_argument);
+                    CHECK_THROWS_AS(json::parser(s1.c_str()).parse(), std::invalid_argument);
-                    CHECK_THROWS_AS(json::parser(s2).parse(), std::invalid_argument);
+                    CHECK_THROWS_AS(json::parser(s2.c_str()).parse(), std::invalid_argument);
-                    CHECK_THROWS_AS(json::parser(s3).parse(), std::invalid_argument);
+                    CHECK_THROWS_AS(json::parser(s3.c_str()).parse(), std::invalid_argument);
-                    CHECK_THROWS_AS(json::parser(s4).parse(), std::invalid_argument);
+                    CHECK_THROWS_AS(json::parser(s4.c_str()).parse(), std::invalid_argument);
 
-                    CHECK_THROWS_WITH(json::parser(s1).parse(), "parse error - unexpected '\"'");
+                    CHECK_THROWS_WITH(json::parser(s1.c_str()).parse(), "parse error - unexpected '\"'");
-                    CHECK_THROWS_WITH(json::parser(s2).parse(), "parse error - unexpected '\"'");
+                    CHECK_THROWS_WITH(json::parser(s2.c_str()).parse(), "parse error - unexpected '\"'");
-                    CHECK_THROWS_WITH(json::parser(s3).parse(), "parse error - unexpected '\"'");
+                    CHECK_THROWS_WITH(json::parser(s3.c_str()).parse(), "parse error - unexpected '\"'");
-                    CHECK_THROWS_WITH(json::parser(s4).parse(), "parse error - unexpected '\"'");
+                    CHECK_THROWS_WITH(json::parser(s4.c_str()).parse(), "parse error - unexpected '\"'");
                 }
             }
         }

test/src/unit-deserialization.cpp

@@ -113,6 +113,12 @@ TEST_CASE("deserialization")
                 std::initializer_list<uint8_t> v = {'t', 'r', 'u', 'e', '\0'};
                 CHECK(json::parse(v) == json(true));
             }
+
+            SECTION("empty container")
+            {
+                std::vector<uint8_t> v;
+                CHECK_THROWS_AS(json::parse(v), std::invalid_argument);
+            }
         }
 
         SECTION("via iterator range")