Source code for pyxu.runtime

 1import enum
 2
 3import numpy as np
 4
 5import pyxu.info.ptype as pxt
 6
 7__all__ = [
 8    "Width",
 9    "CWidth",
10]
11
12

[docs]
13@enum.unique
14class Width(enum.Enum):
15    """
16    Machine-dependent floating-point types.
17    """
18
19    SINGLE = np.dtype(np.single)
20    DOUBLE = np.dtype(np.double)
21

[docs]
22    def eps(self) -> pxt.Real:
23        """
24        Machine precision of a floating-point type.
25
26        Returns the difference between 1 and the next smallest representable float larger than 1.
27        """
28        eps = np.finfo(self.value).eps
29        return float(eps)

30
31    @property
32    def complex(self) -> "CWidth":
33        """
34        Returns precision-equivalent complex-valued type.
35        """
36        return CWidth[self.name]

37
38

[docs]
39@enum.unique
40class CWidth(enum.Enum):
41    """
42    Machine-dependent complex-valued floating-point types.
43    """
44
45    SINGLE = np.dtype(np.csingle)
46    DOUBLE = np.dtype(np.cdouble)
47
48    @property
49    def real(self) -> "Width":
50        """
51        Returns precision-equivalent real-valued type.
52        """
53        return Width[self.name]