Add default NaN/Inf to C#, Java, Python (#5107)

* Add default NaN/Inf to C#, Java, Python

* Python NaN/Inf test added

* Remove MSVC2010/13 dependent code

1 files changed, 11 insertions, 4 deletions

diff --git a/src/idl_gen_python.cpp b/src/idl_gen_python.cpp
index 11491c00..fbb0805c 100644
--- a/src/idl_gen_python.cpp
+++ b/src/idl_gen_python.cpp
@@ -36,7 +36,8 @@ class PythonGenerator : public BaseGenerator {
   PythonGenerator(const Parser &parser, const std::string &path,
                   const std::string &file_name)
       : BaseGenerator(parser, path, file_name, "" /* not used */,
-                      "" /* not used */){
+                      "" /* not used */),
+        float_const_gen_("float('nan')", "float('inf')", "float('-inf')") {
     static const char * const keywords[] = {
       "False",
       "None",
@@ -191,7 +192,7 @@ class PythonGenerator : public BaseGenerator {
     code += "(self):";
     code += OffsetPrefix(field);
     getter += "o + self._tab.Pos)";
-    auto is_bool = field.value.type.base_type == BASE_TYPE_BOOL;
+    auto is_bool = IsBool(field.value.type.base_type);
     if (is_bool) {
       getter = "bool(" + getter + ")";
     }
@@ -200,7 +201,9 @@ class PythonGenerator : public BaseGenerator {
     if (is_bool) {
       default_value = field.value.constant == "0" ? "False" : "True";
     } else {
-      default_value = field.value.constant;
+      default_value = IsFloat(field.value.type.base_type)
+                          ? float_const_gen_.GenFloatConstant(field)
+                          : field.value.constant;
     }
     code += Indent + Indent + "return " + default_value + "\n\n";
   }
@@ -452,7 +455,10 @@ class PythonGenerator : public BaseGenerator {
     } else {
       code += MakeCamel(NormalizedName(field), false);
     }
-    code += ", " + field.value.constant;
+    code += ", ";
+    code += IsFloat(field.value.type.base_type)
+                ? float_const_gen_.GenFloatConstant(field)
+                : field.value.constant;
     code += ")\n";
   }
 
@@ -715,6 +721,7 @@ class PythonGenerator : public BaseGenerator {
   }
  private:
   std::unordered_set<std::string> keywords_;
+  const SimpleFloatConstantGenerator float_const_gen_;
 };
 
 }  // namespace python