forma_json 0.1.0

JSON serialization and deserialization for forma_core.
Documentation 
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use core::fmt;
use forma_core::error::{DeError, SerError};
use std::io;

#[derive(Debug)]
pub enum Error {
    Message(String),
    Io(io::Error),
    Eof,
    Syntax(String, usize, usize),
    ExpectedColon(usize, usize),
    ExpectedCommaOrEnd(usize, usize),
    TrailingData,
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Error::Message(msg) => f.write_str(msg),
            Error::Io(e) => write!(f, "I/O error: {e}"),
            Error::Eof => f.write_str("unexpected end of input"),
            Error::Syntax(msg, line, col) => write!(f, "{msg} at line {line} column {col}"),
            Error::ExpectedColon(line, col) => {
                write!(f, "expected `:` at line {line} column {col}")
            }
            Error::ExpectedCommaOrEnd(line, col) => {
                write!(f, "expected `,` or closing bracket at line {line} column {col}")
            }
            Error::TrailingData => f.write_str("trailing data after JSON value"),
        }
    }
}

impl std::error::Error for Error {}

impl SerError for Error {
    fn custom<T: fmt::Display>(msg: T) -> Self {
        Error::Message(msg.to_string())
    }
}

impl DeError for Error {
    fn custom<T: fmt::Display>(msg: T) -> Self {
        Error::Message(msg.to_string())
    }
}

impl From<io::Error> for Error {
    fn from(e: io::Error) -> Self {
        Error::Io(e)
    }
}