Merge branch 'develop' into iterator_arithmetic

src/json.hpp

@@ -6381,7 +6381,7 @@ class basic_json
             {
                 case value_t::array:
                 {
-                    return *lhs.m_value.array < *rhs.m_value.array;
+                    return (*lhs.m_value.array) < (*rhs.m_value.array);
                 }
                 case value_t::object:
                 {
@@ -8818,7 +8818,7 @@ class basic_json
             // store number of bytes in the buffer
             fill_size = static_cast<size_t>(is.gcount());
 
-            // skip byte-order mark
+            // skip byte order mark
             if (fill_size >= 3 and buffer[0] == '\xEF' and buffer[1] == '\xBB' and buffer[2] == '\xBF')
             {
                 buffer_pos += 3;
@@ -8915,7 +8915,13 @@ class basic_json
       public:
         input_buffer_adapter(const char* b, size_t l)
             : input_adapter(), cursor(b), limit(b + l), start(b)
-        {}
+        {
+            // skip byte order mark
+            if (l >= 3 and b[0] == '\xEF' and b[1] == '\xBB' and b[2] == '\xBF')
+            {
+                cursor += 3;
+            }
+        }
 
         // delete because of pointer members
         input_buffer_adapter(const input_buffer_adapter&) = delete;

test/src/unit-regression.cpp

@@ -711,6 +711,7 @@ TEST_CASE("regression tests")
                               "[json.exception.parse_error.101] parse error at 1: syntax error - unexpected end of input");
         }
 
+        /*
         SECTION("second example from #529")
         {
             std::string str = "{\n\"one\"   : 1,\n\"two\"   : 2\n}\n{\n\"three\" : 3\n}";
@@ -748,6 +749,7 @@ TEST_CASE("regression tests")
 
             std::remove("test.json");
         }
+        */
     }
 
     SECTION("issue #389 - Integer-overflow (OSS-Fuzz issue 267)")
@@ -1167,4 +1169,10 @@ TEST_CASE("regression tests")
         std::vector<uint8_t> vec = {'"', '\\', '"', 'X', '"', '"'};
         CHECK_THROWS_AS(json::parse(vec), json::parse_error);
     }
+
+    SECTION("issue #602 - BOM not skipped when using json:parse(iterator)")
+    {
+        std::string i = "\xef\xbb\xbf{\n   \"foo\": true\n}";
+        CHECK_NOTHROW(json::parse(i.begin(), i.end()));
+    }
 }

test/src/unit-unicode.cpp

@@ -1012,12 +1012,21 @@ TEST_CASE("Unicode", "[hide]")
 
     SECTION("ignore byte-order-mark")
     {
+        SECTION("in a stream")
+        {
             // read a file with a UTF-8 BOM
             std::ifstream f("test/data/json_nlohmann_tests/bom.json");
             json j;
             CHECK_NOTHROW(f >> j);
         }
 
+        SECTION("with an iterator")
+        {
+            std::string i = "\xef\xbb\xbf{\n   \"foo\": true\n}";
+            CHECK_NOTHROW(json::parse(i.begin(), i.end()));
+        }
+    }
+
     SECTION("error for incomplete/wrong BOM")
     {
         CHECK_THROWS_AS(json::parse("\xef\xbb"), json::parse_error);