ouisync/
debug.rs

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#[derive(Clone)]
pub struct DebugPrinter {
    // Used for indentation
    level: usize,
    prefix: String,
}

impl DebugPrinter {
    pub fn new() -> Self {
        Self {
            level: 0,
            prefix: "".into(),
        }
    }

    pub fn debug<T: std::fmt::Debug>(&self, v: &T) {
        // https://stackoverflow.com/a/42273813/273348
        println!(
            "{}{:indent$}{:?}",
            self.prefix,
            "",
            v,
            indent = (2 * self.level)
        );
    }

    pub fn display<T: std::fmt::Display>(&self, v: &T) {
        println!(
            "{}{:indent$}{}",
            self.prefix,
            "",
            v,
            indent = (2 * self.level)
        );
    }

    pub fn indent(&self) -> Self {
        Self {
            level: self.level + 1,
            prefix: self.prefix.clone(),
        }
    }

    pub fn prefix(mut self, p: &str) -> Self {
        self.prefix = p.into();
        self
    }
}

impl Default for DebugPrinter {
    fn default() -> Self {
        DebugPrinter::new()
    }
}