错误：“数字”之前的预期类型说明符

Question

I have attempted to figure out the error above but have come nowhere. Every time I compiler I get the error:

/home/duncan/Desktop/OOPS/dac80/json/parser.cpp: In function 'Value* parseString(std::stringstream&)': /home/duncan/Desktop/OOPS/dac80/json/parser.cpp:149:19: error: expected type-specifier before 'String' Value* val = new String(name);

I have verified that I am including the correct header file in the source files so that the compiler recognizes the file. Below is the code concerning the error

Parser.cpp:

 #include "object_model.h" Value* parseString(std::stringstream& in) { std::string name("123"); Value* val = new String(name); return val; } 

object_model.hpp:

 #ifndef OBJECTMODEL_H #define OBJECTMODEL_H #include <string> #include <sstream> #include <map> #include <vector> enum ValueType { Object = 0, Array = 1, String = 2, Number = 3, True = 4, False = 5, Null = 6}; class Value { public: Value() {} virtual ValueType getType() = 0; }; class String : public Value { public: String(std::string content); ~String(); std::string content; virtual ValueType getType(); }; #endif 

object_model.cpp:

 #include "object_model.h" String::String(std::string content) { this->content = content; } String::~String() { } ValueType String::getType() { return (ValueType)2; } 

Another thing that I have noticed if that I change String to Text then the code compiles completely. Not sure why but would the name String ever conflict with the std::string class?

Answer 1

What Chris means when he says "No, it conflicts with your other String identifier" is that your 'class String' clashes with the identifier 'String' from "enum ValueType { Object = 0, Array = 1, String = 2, Number = 3, True = 4, False = 5, Null = 6};", so what the compiler sees for

Value* val = new String(name);

is

Value* val = new 2(name);