update from master

.gitignore

 json_unit
 json_benchmarks
 
+fuzz-testing
+
+*.dSYM
+
 working
 
 html

Makefile

@@ -9,7 +9,7 @@ all: json_unit
 
 # clean up
 clean:
-	rm -f json_unit json_benchmarks
+	rm -fr json_unit json_benchmarks fuzz fuzz-testing *.dSYM
 
 
 ##########################################################################
@@ -33,6 +33,24 @@ doctest:
 	make check_output -C doc
 
 
+##########################################################################
+# fuzzing
+##########################################################################
+
+# the overall fuzz testing target
+fuzz_testing:
+	rm -fr fuzz-testing
+	mkdir -p fuzz-testing fuzz-testing/testcases fuzz-testing/out
+	$(MAKE) fuzz CXX=afl-clang++
+	mv fuzz fuzz-testing
+	find test/json_tests -size -5k -name *json | xargs -I{} cp "{}" fuzz-testing/testcases
+	@echo "Execute: afl-fuzz -i fuzz-testing/testcases -o fuzz-testing/out fuzz-testing/fuzz"
+
+# the fuzzer binary
+fuzz: test/fuzz.cpp src/json.hpp
+	$(CXX) -std=c++11 $(CXXFLAGS) $(FLAGS) $(CPPFLAGS) -I src $< $(LDFLAGS) -o $@
+
+
 ##########################################################################
 # static analyzer
 ##########################################################################
@@ -57,7 +75,7 @@ pretty:
 	   --indent-col1-comments --pad-oper --pad-header --align-pointer=type \
 	   --align-reference=type --add-brackets --convert-tabs --close-templates \
 	   --lineend=linux --preserve-date --suffix=none \
-	   src/json.hpp src/json.hpp.re2c test/unit.cpp benchmarks/benchmarks.cpp doc/examples/*.cpp
+	   src/json.hpp src/json.hpp.re2c test/unit.cpp test/fuzz.cpp benchmarks/benchmarks.cpp doc/examples/*.cpp
 
 
 ##########################################################################

README.md

@@ -394,6 +394,7 @@ I deeply appreciate the help of the following people.
 - [Corbin Hughes](https://github.com/nibroc) fixed some typos in the contribution guidelines.
 - [twelsby](https://github.com/twelsby) fixed the array subscript operator, an issue that failed the MSVC build, and floating-point parsing/dumping. He further added support for unsigned integer numbers.
 - [Volker Diels-Grabsch](https://github.com/vog) fixed a link in the README file.
+- [msm-](https://github.com/msm-) added support for american fuzzy lop. 
 
 Thanks a lot for helping out!
 

test/fuzz.cpp

+/*
+    __ _____ _____ _____
+ __|  |   __|     |   | |  JSON for Modern C++ (fuzz test support)
+|  |  |__   |  |  | | | |  version 2.0.0
+|_____|_____|_____|_|___|  https://github.com/nlohmann/json
+
+Run "make fuzz_testing" and follow the instructions.
+
+Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+*/
+
+#include <json.hpp>
+
+using json = nlohmann::json;
+
+int main()
+{
+#ifdef __AFL_HAVE_MANUAL_CONTROL
+    while (__AFL_LOOP(1000))
+    {
+#endif
+        try
+        {
+            json j(std::cin);
+            std::cout << j << std::endl;
+        }
+        catch (std::invalid_argument &e)
+        {
+            std::cout << "Invalid argument in parsing" << e.what() << '\n';
+        }
+#ifdef __AFL_HAVE_MANUAL_CONTROL
+    }
+#endif
+}