to_string primitive raise exception when decode non string value, instead return error result

[s-m-i-t-a]

• PyDecoder version: 1.0.1
• Python version: ANY
• Operating System: ANY

Description

Describe what you were trying to get done.
Tell us what happened, what went wrong, and what you expected to happen.

What I Did

from pydecoder.json import to_string

to_string(1234)

TypeError                                 Traceback (most recent call last)
<ipython-input-31-379c7824c645> in <module>()
----> 1 to_string(1234)

~/projects/python/pydecoder/pydecoder/primitives.py in to_string(val)
     30         return error(u'Can\'t be null')
     31
---> 32     return ok(val) if isinstance(val, text_type) else ok(text_type(val, 'utf-8'))
     33
     34

TypeError: decoding to str: need a bytes-like object, int found