imolua/error.lua at main · android-0/imolua · GitHub

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local Error = {
    __tostring = function(s)
        return s.path .. ":" .. s.line .. " " .. s.type .. ": " .. s.msg
    end
}
Error.__index = Error

function Error.new(type, msg, line, path)
    local t = {
        type = type,
        msg  = msg,
        line = line or "-",
        path = path or "source",
    }
    return setmetatable(t, Error)
end

local E = {}

function E.Lexical(msg, line, path)
    local e = Error.new("LexicalError", msg, line, path)
    error(e, 0)
end

function E.Syntax(msg, line, path)
    local e = Error.new("SyntaxError", msg, line, path)
    error(e, 0)
end

function E.Type(msg, line, path)
    local e = Error.new("TypeError", msg, line, path)
    error(e, 0)
end

function E.Name(msg, line, path)
    local e = Error.new("NameError", msg, line, path)
    error(e, 0)
end

return E