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#!/usr/bin/env python3
# *****************************************************************************
# Copyright (C) 2019-2022 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
# This file is part of the thcolor project, which is MIT-licensed.
# *****************************************************************************
"""Exception definitions."""
__all__ = ['ColorExpressionSyntaxError']
class ColorExpressionSyntaxError(Exception):
"""An error has occurred while decoding a color expression.
Such an error can happen during parsing or evaluating.
"""
def __init__(self, text, column=None, func=None):
self._column = column if column is not None and column >= 0 else None
self._func = str(func) if func else None
self._text = str(text) if text else ''
def __str__(self):
msg = ''
if self._column is not None:
msg += f'at column {self._column}'
if self._func is not None:
msg += ', '
if self._func is not None:
msg += f'for function {self._func!r}'
if msg:
msg += ': '
return msg + self._text
@property
def text(self):
"""Exception message, usually linked to the context."""
return self._text
@property
def column(self):
"""Column of the expression at which the exception has occurred.
``None`` if the error has occurred on an unknown column or on
the whole exception.
"""
return self._column
@property
def func(self):
"""Name of the function we were calling when the error occurred.
Either on arguments decoding or erroneous argument type or value.
Is ``None`` if the context is unknown or the error hasn't
occurred while calling a function or decoding its
arguments.
"""
return self._func
# End of file.
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