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Comments on Proper location of docstring on struct with attributes

Post

Proper location of docstring on struct with attributes

+2
−1

When documenting a struct with attributes, where does the docstring go? Before or after the attribute(s)?

Option 1:

/// Does it go here?
#[derive(Deserialize, Debug)]
pub struct Metadata {
    pub version: f32,
    pub contributors: Vec<String>
}

Option 2:

#[derive(Deserialize, Debug)]
/// Does it go here?
pub struct Metadata {
    pub version: f32,
    pub contributors: Vec<String>
}

Option 3 (presumably wrong but adding just in case):

#[derive(Deserialize, Debug)]
pub struct Metadata {
    /// Does it go here? (I assume this would document `version`, 
    /// not the struct)
    pub version: f32,
    pub contributors: Vec<String>
}
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1 comment thread

Unclear (2 comments)
Unclear
Karl Knechtel‭ wrote 10 months ago

Is the question supposed to be about correctness, or style? If it's about correctness, did you try each way? Or if you're trying to offer a self-answered canonical, do you have a reason to expect that people would get it wrong? If it's about style, then what criteria do you consider relevant to make the question not completely subjective?

qohelet‭ wrote 10 months ago

It works both ways, I just assumed there is some formal convention perhaps defined somewhere. I couldn’t find it but did see examples of doc strings in the std lib so assume that is the convention but not any kind of standard per se