Add test case of FP

Author: rvermeulen

cpp/autosar/test/rules/A15-4-4/test.cpp

@@ -43,4 +43,15 @@ void test_swap_wrapper() noexcept {
   int a = 0;
   int b = 1;
   swap_wrapper(&a, &b);
+}
+
+#include <string>
+#include <stdexcept>
+
+std::string test_fp_reported_in_424(const std::string &s1, const std::string &s2) {
+  std::string s3;
+  s3.reserve(s1.size() + s2.size());
+  s3.append(s1.c_str(), s1.size());
+  s3.append(s2.c_str(), s2.size());
+  return s3;
 }

cpp/common/test/includes/standard-library/stdexcept.h

@@ -28,5 +28,7 @@ class nested_exception {
 template <typename T> [[noreturn]] void throw_with_nested(T &&t);
 template <typename E> void rethrow_if_nested(E const &e);
 
+class length_error : public logic_error{};
+class out_of_range: public logic_error{};
 } // namespace std
 #endif // _GHLIBCPP_STDEXCEPT

cpp/common/test/includes/standard-library/string

@@ -166,6 +166,8 @@ public:
   int compare(const charT *s) const;
   int compare(size_type pos1, size_type n1, const charT *s) const;
   int compare(size_type pos1, size_type n1, const charT *s, size_type n2) const;
+
+  void reserve(size_type new_cap = 0);
 };
 
 template <class charT, class traits, class Allocator>