parallel101 / parallel101/course
访问者设计模式缺少继承
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- Dominant language
- C++
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Description
struct MoveMessage :Message{
glm::vec3 velocityChange;
void accept(MessageVisitor *visitor) override {
visitor->visit(this); // 会调用到 visit(MoveMessage *mm) 这个重载
}
};
struct JumpMessage :Message{
double jumpHeight;
void accept(MessageVisitor *visitor) override {
visitor->visit(this); // 会调用到 visit(JumpMessage *mm) 这个重载
}
};
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Open slides/design/game.md around line 1000 and review the visitor-pattern example. Update the example to show MoveMessage and JumpMessage inheriting from Message with accept methods dispatching to the corresponding visitor overloads. Done means the slide accurately demonstrates inheritance and double dispatch in C++.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 1/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 68/100