<!--
title: Improve code readability
domain: runtimes
topic: Code Style
language: C++
source: facebook/yoga
updated: 2023-05-12
url: https://awesomereviewers.com/reviewers/yoga-improve-code-readability/
-->

Enhance code clarity and maintainability by applying several readability techniques: extract repeated expressions into well-named variables, simplify complex boolean logic, use proper constant declarations, and remove redundant code that sets default values.

Key practices:
- Extract repeated expressions: When the same complex expression appears multiple times, extract it into a descriptive variable (e.g., `mainAxisDim` for `node->getLayout().measuredDimensions[dim[mainAxis]]`)
- Simplify complex boolean expressions: Remove redundant parentheses and restructure logic for better visual parsing
- Use proper constant declarations: Prefer `constexpr bool kConstantName = false;` over preprocessor defines or global variables
- Remove redundant default assignments: Don't explicitly set values that are already defaults (e.g., `YGJustifyFlexStart` is the default for justify content)

Example of extracting repeated expressions:
```cpp
// Before
child->getLeadingPosition(mainAxis, node->getLayout().measuredDimensions[dim[mainAxis]])
child->getLeadingMargin(mainAxis, node->getLayout().measuredDimensions[dim[mainAxis]])

// After  
const auto mainAxisDim = node->getLayout().measuredDimensions[dim[mainAxis]];
child->getLeadingPosition(mainAxis, mainAxisDim)
child->getLeadingMargin(mainAxis, mainAxisDim)
```
