Fixed parser that incorrectly rejected floats containing a `+` (issue #349)

CHANGELOG.md

@@ -7,6 +7,7 @@ HEAD
 * Fixed `array[idx].as<JsonVariant>()` and `object[key].as<JsonVariant>()`
 * Fixed return value of `JsonObject::set()` (issue #350)
 * Fixed undefined behavior in `Prettyfier` and `Print` (issue #354)
+* Fixed parser that incorrectly rejected floats containing a `+` (issue #349)
 
 v5.6.6
 ------

include/ArduinoJson/Internals/JsonParser.hpp

@@ -50,7 +50,7 @@ class JsonParser {
 
   static inline bool isLetterOrNumber(char c) {
     return isInRange(c, '0', '9') || isInRange(c, 'a', 'z') ||
-           isInRange(c, 'A', 'Z') || c == '-' || c == '.';
+           isInRange(c, 'A', 'Z') || c == '+' || c == '-' || c == '.';
   }
 
   static inline bool isQuote(char c) {

include/ArduinoJson/JsonObject.ipp

@@ -17,14 +17,14 @@ template <>
 inline bool JsonObject::setNodeValue(node_type *node, String &value) {
   const char *dup = _buffer->strdup(value);
   node->content.value = dup;
-  return dup;
+  return dup != NULL;
 }
 
 template <>
 inline bool JsonObject::setNodeValue(node_type *node, const String &value) {
   const char *dup = _buffer->strdup(value);
   node->content.value = dup;
-  return dup;
+  return dup != NULL;
 }
 
 template <>

include/ArduinoJson/Print.hpp

@@ -23,7 +23,7 @@ class Print {
   size_t print(const char* s) {
     size_t n = 0;
     while (*s) {
-      n += write(*s++);
+      n += write(static_cast<uint8_t>(*s++));
     }
     return n;
   }

test/CMakeLists.txt

@@ -26,9 +26,6 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "(GNU|Clang)")
 		-Winit-self
 		-Wmissing-include-dirs
 		-Wparentheses
-		-Wno-sign-conversion
-		-Wno-unused
-		-Wno-variadic-macros
 		-Wnon-virtual-dtor
 		-Wold-style-cast
 		-Woverloaded-virtual
@@ -63,7 +60,10 @@ endif()
 
 if(MSVC)
 	add_definitions(-D_CRT_SECURE_NO_WARNINGS)
-	add_compile_options(-W4)
+	add_compile_options(
+		/W4 # Set warning level
+		/WX # Treats all compiler warnings as errors.
+	)
 endif()
 
 add_executable(ArduinoJsonTests ${TESTS_FILES})

test/JsonParser_Variant_Tests.cpp

@@ -24,13 +24,29 @@ class JsonParser_Variant_Test : public testing::Test {
     EXPECT_STREQ(expected, _result.as<char*>());
   }
 
+  void resultMustEqual(double expected) {
+    EXPECT_DOUBLE_EQ(expected, _result.as<double>());
+  }
+
   template <typename T>
   void resultTypeMustBe() {
     EXPECT_TRUE(_result.is<T>());
   }
 
-  void resultMustBeInvalid() { EXPECT_FALSE(_result.success()); }
-  void resultMustBeValid() { EXPECT_TRUE(_result.success()); }
+  void resultMustBeInvalid() {
+    EXPECT_FALSE(_result.success());
+  }
+  void resultMustBeValid() {
+    EXPECT_TRUE(_result.success());
+  }
+
+  template <typename T>
+  void verify(const char* input, T expected) {
+    whenInputIs(input);
+    resultMustBeValid();
+    resultTypeMustBe<T>();
+    resultMustEqual(expected);
+  }
 
  private:
   DynamicJsonBuffer _jsonBuffer;
@@ -51,38 +67,29 @@ TEST_F(JsonParser_Variant_Test, EmptyArray) {
 }
 
 TEST_F(JsonParser_Variant_Test, Integer) {
-  whenInputIs("42");
-  resultMustBeValid();
-  resultTypeMustBe<int>();
-  resultMustEqual(42);
+  verify("42", 42);
+  verify("-42", -42);
 }
 
 TEST_F(JsonParser_Variant_Test, Double) {
-  whenInputIs("3.14");
-  resultMustBeValid();
-  resultTypeMustBe<double>();
-  resultMustEqual(3.14);
+  verify("3.14", 3.14);
+  verify("3.14", 3.14);
+  verify("1E+10", 1E+10);
+  verify("-1E+10", -1E+10);
+  verify("1.234E+10", 1.234E+10);
+  verify("1.79769e+308", 1.79769e+308);
+  verify("-1.79769e+308", -1.79769e+308);
+  verify("1.7976931348623157e+308", 1.7976931348623157e+308);
+  verify("0.017976931348623157e+310", 0.017976931348623157e+310);
 }
 
 TEST_F(JsonParser_Variant_Test, String) {
-  whenInputIs("\"hello world\"");
-  resultMustBeValid();
-  resultTypeMustBe<char*>();
-  resultMustEqual("hello world");
+  verify("\"hello world\"", "hello world");
 }
 
 TEST_F(JsonParser_Variant_Test, True) {
-  whenInputIs("true");
-  resultMustBeValid();
-  resultTypeMustBe<bool>();
-  resultMustEqual(true);
-}
-
-TEST_F(JsonParser_Variant_Test, False) {
-  whenInputIs("false");
-  resultMustBeValid();
-  resultTypeMustBe<bool>();
-  resultMustEqual(false);
+  verify("true", true);
+  verify("false", false);
 }
 
 TEST_F(JsonParser_Variant_Test, Invalid) {