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use std::sync::RwLock;

pub struct IoBuffer {
    buffer: String,
}

impl IoBuffer {
    const fn new() -> Self {
        Self {
            buffer: String::new(),
        }
    }

    pub fn get(&self) -> String {
        self.buffer.clone()
    }

    pub fn write<S>(&mut self, value: S)
    where
        S: AsRef<str>
    {
        self.buffer += value.as_ref();
    }

    pub fn writeln<S>(&mut self, value: S)
    where
        S: AsRef<str>
    {
        self.buffer += value.as_ref();
        self.buffer += "\n";
    }
}

static STDOUT_BUFFER: RwLock<IoBuffer> = RwLock::new(IoBuffer::new());

pub fn iobuffer() -> &'static RwLock<IoBuffer> {
    &STDOUT_BUFFER
}