stan-dev/stan

var_context builder

Open

#2,924 创建于 2020年5月23日

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featuregood first issue

描述

Summary:

It'd be nice to have a builder pattern for var contexts to make them easy to construct for testing. Something that could be used like this:

MatrixXd m(3, 2); 
...
var_context vc
  = var_context::builder()
    .matrix("a", m)
    .real("f", 2.3)
    .build();

Current Version:

v2.23.0

贡献者指南

技术栈
cpp
领域
developer experiencetesting
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
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half day
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fresh
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clear
前置要求
C++ builder patternStan var context class
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
60
研究方向
The issue requests a builder pattern for `var context` to simplify test construction. The implementation should be done in the existing C++ source code, likely in `src/stan/io/var context.hpp` or similar. A builder class with methods like `matrix()` and `real()` should be added, culminating in a `build()` method that returns a `var context`. No existing PRs or comments provide additional guidance; the developer should design the builder according to typical C++ builder patterns and ensure compatibility with the existing `var context` interface.