54 lines
1.8 KiB
Python
54 lines
1.8 KiB
Python
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#! /usr/bin/env python
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# -*- coding: utf-8 -*-
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# vim:fenc=utf-8
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#
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# Copyright © 2017 lafrite <lafrite@Poivre>
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#
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# Distributed under terms of the MIT license.
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"""
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Tokens represents MathObject at API level
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"""
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from ...core.MO.mo import MO, MOnumber, MOstr
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from ...core.MO.fraction import MOFraction
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from ...core.MO.monomial import MOstrPower, MOMonomial
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from ...core.MO.polynomial import MOpolynomial
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from decimal import Decimal as _Decimal
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from .number import Integer, Decimal, Fraction
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from .polynomial import Polynomial, Linear, Quadratic
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__all__ = ["factory"]
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def factory(exp, name="", ancestor=None):
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""" Transform a Expression with on MathObject (from core) to a appropriate token (from API)
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"""
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mo = exp._tree
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if not isinstance(mo, MO):
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raise TypeError(f"Can't build Token from not computed Expression (got {mo})")
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if isinstance(mo, MOnumber):
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if isinstance(mo.value, int):
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return Integer(mo, name, ancestor)
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elif isinstance(mo.value, _Decimal):
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return Decimal(mo, name, ancestor)
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else:
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raise TypeError(f"Can't build from MOnumber ({mo}) neither int nor decimal")
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elif isinstance(mo, MOFraction):
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if isinstance(mo._denominator, MOnumber) and \
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isinstance(mo._numerator, MOnumber):
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return Fraction(mo, name, ancestor)
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else:
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raise TypeError(f"Can't build from MOFraction ({mo}) numerator and denominator are not MOnumber")
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elif isinstance(mo, (MOstr, MOstrPower, MOMonomial, MOpolynomial)):
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raise TypeError(f"Can't build Polynom yet")
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else:
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raise TypeError(f"{type(mo)} is unknown MathObject")
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# -----------------------------
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# Reglages pour 'vim'
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# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
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# cursor: 16 del
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