1259     const char* needle_expr, const char* haystack_expr,  in IsSubstringImpl()  argument
1270       << "a substring of " << haystack_expr << "\n"  in IsSubstringImpl()
1281     const char* needle_expr, const char* haystack_expr,  in IsSubstring()  argument
1283   return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);  in IsSubstring()
1287     const char* needle_expr, const char* haystack_expr,  in IsSubstring()  argument
1289   return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);  in IsSubstring()
1293     const char* needle_expr, const char* haystack_expr,  in IsNotSubstring()  argument
1295   return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);  in IsNotSubstring()
1299     const char* needle_expr, const char* haystack_expr,  in IsNotSubstring()  argument
1301   return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);  in IsNotSubstring()
1305     const char* needle_expr, const char* haystack_expr,  in IsSubstring()  argument
1307   return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);  in IsSubstring()
1311     const char* needle_expr, const char* haystack_expr,  in IsNotSubstring()  argument
1313   return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);  in IsNotSubstring()
1318     const char* needle_expr, const char* haystack_expr,  in IsSubstring()  argument
1320   return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);  in IsSubstring()
1324     const char* needle_expr, const char* haystack_expr,  in IsNotSubstring()  argument
1326   return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);  in IsNotSubstring()