Library registration

[lukasc-ubc]

Hi Matthias,

for Library.register, the documentation states that it replaces the library.

https://www.klayout.de/doc-qt5/code/class_Library.html#method24

self.register(library)

However, if I run the library multiple times, it shows up repeated:

In 0.26.12, it replaced correctly. Furthermore, documentation says that this and other features were introduced in 0.27, but they were already in 0.26.

I checked this in version 0.27.2, klayout HW-klayout-0.27.2-macOS-BigSur-1-qt5Brew-RsysPhb38

[klayoutmatthias]

This is the same as in #810, right?

So I copy my attempt to reproduce it here:

---

Hi Lucas,

I tried first to reproduce the "library.register" problem, but I can't confirm that (Linux).

This is what works for me:

lib_a = RBA::Library::new
lib_a.layout.add_cell("LIB_A")
lib_a.register("ISSUE_810_LIB")

lib_b = RBA::Library::new
lib_b.layout.add_cell("LIB_B")
lib_b.add_technology("si4all")
lib_b.register("ISSUE_810_LIB")

# register another library for tech "si4all" which replaces lib_b
lib_c = RBA::Library::new
lib_c.layout.add_cell("LIB_C")
lib_c.add_technology("si4all")
lib_c.register("ISSUE_810_LIB")

# register another library for "no tech" which replaces lib_a
lib_x = RBA::Library::new
lib_x.layout.add_cell("LIB_X")
lib_x.register("ISSUE_810_LIB")

This will correctly register two libraries "ISSUE_810_LIB", one for "si4all" technology, the other unspecific. The first two "register" calls are replaced.

[JinWallner]

Hi Lucas,

I see the same issue. After I move the self.register(library) to the end after the self.technology=tech_name or self.add_technology(tech_name), the issue is gone.

[lukasc-ubc]

Thanks @JinWallner, that solved it!

@klayoutmatthias - moving the registration after the self.technology=tech_name fixed it. Is that intentional behaviour? if so perhaps add to the documentation.

thanks!