search
HomeBackend DevelopmentC++How Can I Avoid Member Invisibility and Source Code Bloat in Inherited Class Templates?

How Can I Avoid Member Invisibility and Source Code Bloat in Inherited Class Templates?

Avoiding Member Invisibility and Source Code Bloat with Inherited Class Templates

The problem encountered occurs when a class template, CDerived, inherits from a base class template, CBase, and all public members of CBase become invisible to CDerived when the code is compiled with standard C conformance enabled.

Solutions to the Problem:

Solution #1: Explicit Qualification

Prefix references to CBase members in CDerived with CBase::, e.g., Fn1() becomes CBase::Fn1(). This forces name lookup to occur in the base class scope, making the members visible. However, this solution requires many verbose additions to the code, leading to source code bloat.

Solution #2: this-> Prefix

Prefix references to CBase members with this->, e.g., Fn1() becomes this->Fn1(). This also makes the members visible, but again requires verbose code alterations.

Solution #3: Using Statements

Add using statements inside CDerived to import CBase members, e.g., using CBase::Fn1; using CBase::Fn2;. This requires only one using statement per member used in CDerived, but a blanket statement to import all members does not exist.

Solution #4: Non-Standard Permissive Mode

Disable strict C conformance in the compiler settings to suppress the name lookup issue. However, this is a global solution that breaks away from the standard and is not portable.

A More Concise Solution #5:

To reduce the verbosity of Solution #3, macros can be used to generate the necessary using statements.

Implementation:

Include the Boost preprocessor library and define a macro, USING_ONE, to generate a single using statement for a specific base member.

Define another macro, USING_ALL, to generate a sequence of using statements for all specified base members.

In the base class template, define a macro, USING_CBASE, to generate the using statements for all protected and public members that will be used in derived class templates.

Within the derived class template, use the appropriate USING_CBASE macro to import the necessary members using the macros defined earlier. This process requires minimal searching and typing, reducing source code bloat while still maintaining portability.

The above is the detailed content of How Can I Avoid Member Invisibility and Source Code Bloat in Inherited Class Templates?. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
C# vs. C  : Learning Curves and Developer ExperienceC# vs. C : Learning Curves and Developer ExperienceApr 18, 2025 am 12:13 AM

There are significant differences in the learning curves of C# and C and developer experience. 1) The learning curve of C# is relatively flat and is suitable for rapid development and enterprise-level applications. 2) The learning curve of C is steep and is suitable for high-performance and low-level control scenarios.

C# vs. C  : Object-Oriented Programming and FeaturesC# vs. C : Object-Oriented Programming and FeaturesApr 17, 2025 am 12:02 AM

There are significant differences in how C# and C implement and features in object-oriented programming (OOP). 1) The class definition and syntax of C# are more concise and support advanced features such as LINQ. 2) C provides finer granular control, suitable for system programming and high performance needs. Both have their own advantages, and the choice should be based on the specific application scenario.

From XML to C  : Data Transformation and ManipulationFrom XML to C : Data Transformation and ManipulationApr 16, 2025 am 12:08 AM

Converting from XML to C and performing data operations can be achieved through the following steps: 1) parsing XML files using tinyxml2 library, 2) mapping data into C's data structure, 3) using C standard library such as std::vector for data operations. Through these steps, data converted from XML can be processed and manipulated efficiently.

C# vs. C  : Memory Management and Garbage CollectionC# vs. C : Memory Management and Garbage CollectionApr 15, 2025 am 12:16 AM

C# uses automatic garbage collection mechanism, while C uses manual memory management. 1. C#'s garbage collector automatically manages memory to reduce the risk of memory leakage, but may lead to performance degradation. 2.C provides flexible memory control, suitable for applications that require fine management, but should be handled with caution to avoid memory leakage.

Beyond the Hype: Assessing the Relevance of C   TodayBeyond the Hype: Assessing the Relevance of C TodayApr 14, 2025 am 12:01 AM

C still has important relevance in modern programming. 1) High performance and direct hardware operation capabilities make it the first choice in the fields of game development, embedded systems and high-performance computing. 2) Rich programming paradigms and modern features such as smart pointers and template programming enhance its flexibility and efficiency. Although the learning curve is steep, its powerful capabilities make it still important in today's programming ecosystem.

The C   Community: Resources, Support, and DevelopmentThe C Community: Resources, Support, and DevelopmentApr 13, 2025 am 12:01 AM

C Learners and developers can get resources and support from StackOverflow, Reddit's r/cpp community, Coursera and edX courses, open source projects on GitHub, professional consulting services, and CppCon. 1. StackOverflow provides answers to technical questions; 2. Reddit's r/cpp community shares the latest news; 3. Coursera and edX provide formal C courses; 4. Open source projects on GitHub such as LLVM and Boost improve skills; 5. Professional consulting services such as JetBrains and Perforce provide technical support; 6. CppCon and other conferences help careers

C# vs. C  : Where Each Language ExcelsC# vs. C : Where Each Language ExcelsApr 12, 2025 am 12:08 AM

C# is suitable for projects that require high development efficiency and cross-platform support, while C is suitable for applications that require high performance and underlying control. 1) C# simplifies development, provides garbage collection and rich class libraries, suitable for enterprise-level applications. 2)C allows direct memory operation, suitable for game development and high-performance computing.

The Continued Use of C  : Reasons for Its EnduranceThe Continued Use of C : Reasons for Its EnduranceApr 11, 2025 am 12:02 AM

C Reasons for continuous use include its high performance, wide application and evolving characteristics. 1) High-efficiency performance: C performs excellently in system programming and high-performance computing by directly manipulating memory and hardware. 2) Widely used: shine in the fields of game development, embedded systems, etc. 3) Continuous evolution: Since its release in 1983, C has continued to add new features to maintain its competitiveness.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
Will R.E.P.O. Have Crossplay?
1 months agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.