[Bug 4261] Bad behavior when using '°' unit in expressions

[openBrain]

Steps to reproduce :

1. Create a new document, select PartDesign WB
2. Add a sketch (you can just let it empty)
3. Create a DatumPlane (locate it at any position)
4. Try to enter as expression for DatumPlane/AttachmentOffset/Angle the following :'90°-atan(Sk' => You'll notice first that 'Sketch' is only proposed when you enter the 'k', then that if you select 'Sketch' proposal with down arrow, it is replaced by 'SSketch' in the expression (doubled 'S')

If you use 'deg' instead of '°' in the expression, the 2 issues described aren't present : 'Sketch' is proposed as soon as 'S' is entered, and it is correctly entered in the expressions if you select the proposal with down arrow.

Thx for confirming.

As a sidenote, I get lot more problems with expressions in this file. Expressions using '°' just vanished, and some had the object reference cleared (eg. 'Sketch.Constraints.xxx' was saved as '.Constraints.xxx') but I'm not able to reproduce it ATM.
---
OS: Windows 7 SP 1 (6.1)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.19461 (Git)
Build type: Release
Branch: master
Hash: da71719896847b0e2a5716e7afb5d4cb4b326990
Python version: 3.6.8
Qt version: 5.12.1
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: French/France (fr_FR)

[wmayer]

Confirmed. Feel free to create a bug report.

[openBrain]

Confirmed. Feel free to create a bug report.

issue #4261. Set it to 'major' severity as ATM I think it could create more severe issues in the expression engine than the one described here at document loading time.

[vocx]

I found this when testing Draft.

Code: Select all

import FreeCAD as App
value_in_degrees = App.Units.Quantity(45, App.Units.Angle)
round(value_in_degrees)

Code: Select all

Traceback (most recent call last):
  File "<input>", line 1, in <module>
TypeError: type Base.Quantity doesn't define __round__ method

The Draft Dimension tool can create angular dimension objects which use App::PropertyAngles. Internally the code does some rounding, resulting in the above errors. What would be the proper way to solve this? Extend App::PropertyAngle to support __round__()? Or change the Draft code to extract the numeric value?

Code: Select all

#Something like
round(obj.MyAngle.Value)