几个错误C2146：语法错误：缺少';'在'*'之前，我没有找到任何东西。 [英] several Error C2146: syntax error : missing ';' before '*' , I didn't find anything.

问题描述

我正在从企业架构师（类图）生成这个c ++代码（头文件），并面临几个错误，如

1.错误C2146：语法错误：在第24行'*'之前缺少';'（已评论）

2.错误C2143：语法错误：在第27行的'&'之前缺少'，'（我评论了它。 ）



我找不到这个有什么问题..

我是C ++的新手..

Hi,
I'm generating this c++ code(header file) from enterprise architect(class diagram) and facing several errors like
1. error C2146: syntax error : missing ';' before '*' on line 24 (Commented)
2. error C2143: syntax error : missing ',' before '&' on line 27 (I commented it out.)

I couldn't find what's wrong with this..
I'm new to C++..

#include "oss.h"
#include "asn1.h"

#if !defined(EA_A82413CF_73C9_4cd6_8B8B_1DB261A17DF0__INCLUDED_)
#define EA_A82413CF_73C9_4cd6_8B8B_1DB261A17DF0__INCLUDED_

class __seqof1 : public OssList
{

public:
	typedef CareerEntry component;

	__seqof1();
	__seqof1(const __seqof1& prm1);
	~__seqof1();
	component * at(OssIndex prm1);  // line 24
	const component * at(OssIndex prm1) const;
	__seqof1 * extract_after(OssIndex prm1, OssIndex prm2);
	OssIndex insert_after(OssIndex prm1, const component& prm2); //line 27
	OssIndex insert_after(OssIndex prm1, __seqof1* prm2);
	int operator !=(const __seqof1& prm1) const;
	__seqof1 & operator =(const __seqof1& prm1);
	int operator ==(const __seqof1& prm1) const;
	OssIndex prepend(const component& prm1);
	OssIndex prepend(__seqof1* prm1);
	int remove_after(OssIndex prm1);
	int remove_front();

};

class BBCard
{

public:
	typedef OssString name;

	typedef OSS_UINT32 age;

	typedef OssString position;

	typedef __seqof1 career;


	virtual ~BBCard();

	BBCard();
	BBCard(const BBCard& prm1);
	BBCard(const name& prm1, BBCard::age prm2, const position& prm3, const career& prm4);
	age & get_age();
	BBCard::age get_age() const;
	career & get_career();
	const career & get_career() const;
	name & get_name();
	const name & get_name() const;
	position & get_position();
	const position & get_position() const;
	int operator !=(const BBCard& prm1) const;
	BBCard & operator =(const BBCard& prm1);
	int operator ==(const BBCard& prm1) const;
	void operator delete(void* ptr);
	void * operator new(size_t size);
	void set_age(BBCard::age prm1);
	void set_career(const career& prm1);
	void set_name(const name& prm1);
	void set_position(const position& prm1);

private:
	BBCard::age age_field;
	BBCard::career career_field;
	BBCard::name name_field;
	BBCard::position position_field;

};

/**
* Specific PDU classes
*/
class BBCard_PDU : public ConcretePDU
{

public:
	virtual ~BBCard_PDU();

	BBCard_PDU();
	const BBCard * get_const_data() const;
	BBCard * get_data() const;
	void set_const_data(const BBCard& d);
	void set_data(BBCard& prm1);

protected:
	OssTypeIndex get_index() const;

};

/**
* Control object class
*/
class bcas_Control : public OssControl
{

public:
	virtual ~bcas_Control();

	bcas_Control();
	bcas_Control(const bcas_Control& prm1);

};

/**
* Universal PDU class
*/
class bcas_PDU : public UniversalPDU
{

public:
	virtual ~bcas_PDU();

	bcas_PDU();
	BBCard * get_BBCard() const;
	const BBCard * get_const_BBCard() const;
	void set_BBCard(BBCard& prm1);
	void set_const_BBCard(const BBCard& prm1);

};

/**
* Representation types
*/
class CareerEntry
{

public:
	typedef OSS_UINT32 from;

	typedef OSS_UINT32 to;

	typedef OssString team;


	virtual ~CareerEntry();

	CareerEntry();
	CareerEntry(const CareerEntry& prm1);
	CareerEntry(CareerEntry::from prm1, CareerEntry::to prm2, const team& prm3);
	CareerEntry(CareerEntry::from prm1, const team& prm2);
	from & get_from();
	CareerEntry::from get_from() const;
	team & get_team();
	const team & get_team() const;
	to * get_to();
	const to * get_to() const;
	void omit_to();
	int operator !=(const CareerEntry& prm1) const;
	CareerEntry & operator =(const CareerEntry& prm1);
	int operator ==(const CareerEntry& prm1) const;
	void operator delete(void* ptr);
	void * operator new(size_t size);
	void set_from(CareerEntry::from prm1);
	void set_team(const team& prm1);
	void set_to(CareerEntry::to prm1);
	int to_is_present() const;

private:
	OSS_UINT32 bit_mask;
	CareerEntry::from from_field;
	CareerEntry::team team_field;
	CareerEntry::to to_field;

};
#endif // !defined(EA_A82413CF_73C9_4cd6_8B8B_1DB261A17DF0__INCLUDED_)

推荐答案

那是因为你的 CareerEntry 类在第一次使用时是未知的。



你应该使用前向声明而不是a typedef ：

That is because your CareerEntry class is unknown when used first.

You should use a forward declaration instead of a typedef:

// Forward declaration
class CareerEntry;

class __seqof1 : public OssList
{
public:
// Remove this
//	typedef CareerEntry component;
 
	__seqof1();
	__seqof1(const __seqof1& prm1);
	~__seqof1();
	CareerEntry * at(OssIndex prm1);
	const CareerEntry * at(OssIndex prm1) const;
	__seqof1 * extract_after(OssIndex prm1, OssIndex prm2);
	OssIndex insert_after(OssIndex prm1, const CareerEntry& prm2);
// ...
};

class CareerEntry
{
// ...
};

使用 typedef 这里的样式很糟糕并且代码混淆。

Using typedefs here is bad style and obfuscates the code.

如果没有看到包含的文件，很难猜到。但是，您至少在转发声明之前不能使用 CareerEntry 类。

我的意思是，以下程序不正确：

Without seeing the included files, it is hard to guess. However, you cannot use CareerEntry class before, at least, a forward declaration.
I mean, the following program is incorrect:

#include <iostream>
using namespace std;

class Foo
{
  typedef Bar B;

  B * b();
};

class Bar
{

};

Bar * Foo::b(){return new Bar();}

int main(){}

因缺少前瞻性声明。修复以下内容：

because of a missing forward declaration. The following one is fixed:

#include <iostream>
using namespace std;

class Bar; // class forward declaration

class Foo
{
  typedef Bar B;

  B * b();
};

class Bar
{

};

Bar * Foo::b(){return new Bar();}

int main(){}

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