Commit e09cbe6695b312a52704e01e9bdd49bd4b1d19a5
2025-04-02T10:46:06
symbols: Fix handling of empty keys Before this commit, the following symbols: ```c xkb_symbols { virtual_modifiers M1, M2; key <A> {}; key <B> { [] }; key.vmods = M1; key <C> {}; key <D> { vmods = M2 }; }; ``` would be equivalent to: ```c xkb_symbols { virtual_modifiers M1,M2; key <B> { [ NoSymbol ] }; }; ``` `<B>` entry could be skipped but is harmless. However, `<C>` and `<D>` are missing, which would lead to the mapping resolution of `M1` and `M2` failing. After this commit, it is equivalent to: ```c virtual_modifiers M1,M2; key <C> { vmods = M1 }; key <D> { vmods = M2 }; ``` Empty keys are skipped entirely, but any explicit field: - is taken into account: previously they would be skipped if there were no group; - forces the key to be printed at serialization.