kopia lustrzana https://github.com/micropython/micropython
3c4bfd1dec
This commit adds the errno attribute to exceptions, so code can retrieve errno codes from an OSError using exc.errno. The implementation here simply lets `errno` (and the existing `value`) attributes work on any exception instance (they both alias args[0]). This is for efficiency and to keep code size down. The pros and cons of this are: Pros: - more compatible with CPython, less difference to document and learn - OSError().errno will correctly return None, whereas the current way of doing it via OSError().args[0] will raise an IndexError - it reduces code size on most bare-metal ports (because they already have the errno qstr) - for Python code that uses exc.errno the generated bytecode is 2 bytes smaller and more efficient to execute (compared with exc.args[0]); so bytecode loaded to RAM saves 2 bytes RAM for each use of this attribute, and bytecode that is frozen saves 2 bytes flash/ROM for each use - it's easier/shorter to type, and saves 2 bytes of space in .py files that use it (for each use) Cons: - increases code size by 4-8 bytes on minimal ports that don't already have the `errno` qstr - all exceptions now have .errno and .value attributes (a cpydiff test is added to address this) See also #2407. Signed-off-by: Damien George <damien@micropython.org> |
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| .. | ||
| _thread.rst | ||
| btree.rst | ||
| builtins.rst | ||
| cmath.rst | ||
| esp.rst | ||
| esp32.rst | ||
| framebuf.rst | ||
| gc.rst | ||
| index.rst | ||
| lcd160cr.rst | ||
| machine.ADC.rst | ||
| machine.ADCWiPy.rst | ||
| machine.I2C.rst | ||
| machine.Pin.rst | ||
| machine.RTC.rst | ||
| machine.SD.rst | ||
| machine.SDCard.rst | ||
| machine.SPI.rst | ||
| machine.Signal.rst | ||
| machine.Timer.rst | ||
| machine.TimerWiPy.rst | ||
| machine.UART.rst | ||
| machine.WDT.rst | ||
| machine.rst | ||
| math.rst | ||
| micropython.rst | ||
| network.CC3K.rst | ||
| network.WIZNET5K.rst | ||
| network.WLAN.rst | ||
| network.WLANWiPy.rst | ||
| network.rst | ||
| pyb.ADC.rst | ||
| pyb.Accel.rst | ||
| pyb.CAN.rst | ||
| pyb.DAC.rst | ||
| pyb.ExtInt.rst | ||
| pyb.Flash.rst | ||
| pyb.I2C.rst | ||
| pyb.LCD.rst | ||
| pyb.LED.rst | ||
| pyb.Pin.rst | ||
| pyb.RTC.rst | ||
| pyb.SPI.rst | ||
| pyb.Servo.rst | ||
| pyb.Switch.rst | ||
| pyb.Timer.rst | ||
| pyb.UART.rst | ||
| pyb.USB_HID.rst | ||
| pyb.USB_VCP.rst | ||
| pyb.rst | ||
| uarray.rst | ||
| uasyncio.rst | ||
| ubinascii.rst | ||
| ubluetooth.rst | ||
| ucollections.rst | ||
| ucryptolib.rst | ||
| uctypes.rst | ||
| uerrno.rst | ||
| uhashlib.rst | ||
| uheapq.rst | ||
| uio.rst | ||
| ujson.rst | ||
| uos.rst | ||
| ure.rst | ||
| uselect.rst | ||
| usocket.rst | ||
| ussl.rst | ||
| ustruct.rst | ||
| usys.rst | ||
| utime.rst | ||
| uzlib.rst | ||
| wipy.rst | ||