jsonrs 1.4.0

Json parser
Documentation 
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use core::num::ParseFloatError;
use core::{error, fmt};

use crate::lexer::span::FilePosition;
use crate::prelude::{Cow, String, ToString};

#[derive(Debug)]
pub struct Error {
    msg: Cow<'static, str>,
    fpos: Option<FilePosition>,
}

impl Error {
    pub fn new(msg: impl Into<Cow<'static, str>>) -> Self {
        Self {
            msg: msg.into(),
            fpos: None,
        }
    }
    pub fn set_file_pos(&mut self, fpos: FilePosition) {
        self.fpos = Some(fpos);
    }

    pub fn get_message(&self) -> &Cow<'static, str> {
        &self.msg
    }
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        if let Some(fpos) = self.fpos {
            let FilePosition {
                start_line,
                start_col,
                ..
            } = fpos;
            write!(f, "[{start_line}:{start_col}]: ")?;
        }
        write!(f, "{}", self.msg)
    }
}

impl error::Error for Error {}

impl From<Cow<'static, str>> for Error {
    fn from(value: Cow<'static, str>) -> Self {
        Error::new(value)
    }
}

impl From<ParseFloatError> for Error {
    fn from(value: ParseFloatError) -> Self {
        Error::new(value.to_string())
    }
}

impl From<&'static str> for Error {
    fn from(value: &'static str) -> Self {
        Error::new(value)
    }
}

impl From<String> for Error {
    fn from(value: String) -> Self {
        Error::new(value)
    }
}