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Merge bitcoin/bitcoin#18568: doc: Clarify developer notes about constant naming
05f9770c1fa64bd9730cd6e18ec333e0801c00d6 doc: Clarify developer notes about constant naming (Russell Yanofsky)
Pull request description:
I'm pretty sure developer notes were intended to say constants should be upper case and variables should be lower case, but right now they are ambiguous about whether to write:
```c++
extern const int SYMBOL;
```
or:
```c++
extern const int g_symbol;
```
First convention above is better than the second convention because it tells you without having to look anything up that the value of `SYMBOL` won't change at runtime. Also I haven't seen other c++ projects using the second convention.
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@ -83,7 +83,7 @@ code.
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separate words (snake_case).
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- Class member variables have a `m_` prefix.
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- Global variables have a `g_` prefix.
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- Compile-time constant names are all uppercase, and use `_` to separate words.
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- Constant names are all uppercase, and use `_` to separate words.
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- Class names, function names, and method names are UpperCamelCase
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(PascalCase). Do not prefix class names with `C`.
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- Test suite naming convention: The Boost test suite in file
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