lide.error¶

[lide.core] ^0.01

This module is loaded with lide.core it’s part of framework into the lide.error module we will find the necessary functions to robust error handling implemented in Lua.
local try, catch = lide.error.try, lide.error.catch;

try { function( )
   ...
end,

catch { function( err )
   print(err);
end
}};

Creation and handling exceptions:¶

It is also possible to be more precise and to find the type of error we are looking for, that’s what the exceptions are for.

We can create new exceptions and control them with the catch function.

local TypeError = lide.error.newException 'TypeError'

try{
  function()
      function foo(text)
          if type(text) ~= 'string' then
             TypeError '"text" It\'s not string type.'
          end
      end

      foo(1) -- We run the function with a number as an argument for our error to propagate.

  end,

catch {
  function( err )
      if err:isa(TypeError) then -- We use the "isa" method to compare what type of error / exception it is.

         print(err.traceback)
      end
  end
 }
}

lide.error.try¶

Within this function we will put the piece of code that could have an error.

nil	lide.error.try ( function try_code )

lide.error.catch¶

Optional Within this function we will put the code that will be executed in case of error.

nil	lide.error.catch ( function catch_code ( Exception exception ) )

lide.error.finally¶

Optional Here we should put cleaning code

nil	lide.error.finally ( function finally_code )

lide.error.is_string¶

Check if given value is type string

nil	lide.error.is_string( value )

lide.error.is_number¶

Check if given value is type number

nil	lide.error.is_number( value )

lide.error.is_table¶

Check if given value is type table

nil	lide.error.is_table( value )

lide.error.is_function¶

Check if given value is type function

nil	lide.error.is_function( value )

lide.error.is_boolean¶

Check if given value is type boolean

nil	lide.error.is_boolean( value )

lide.error.is_object¶

Check if given value is type object

nil	lide.error.is_object( value )

lide.error.newException¶

Create an exception

Exception

lide.error.newException ( string sExceptionName, string sDefaultErrMsg )

lide.error.TypeError¶

Trhow an exception

nil	lide.error.newException ( string sExceptionName, string sErrorMsg )