Massimiliano Culpo b8e3246e89 llnl.util.lang: add classes to help with deprecations (#47279) ... * Add a descriptor to have a class level constant This descriptor helps intercept places where we set a value on instances. It does not really behave like "const" in C-like languages, but is the simplest implementation that might still be useful. * Add a descriptor to deprecate properties/attributes of an object This descriptor is used as a base class. Derived classes may implement a factory to return an adaptor to the attribute being deprecated. The descriptor can either warn, or raise an error, when usage of the deprecated attribute is intercepted. --------- Co-authored-by: Harmen Stoppels <me@harmenstoppels.nl>		2024-10-29 19:06:26 +01:00
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spack	llnl.util.lang: add classes to help with deprecations (#47279)	2024-10-29 19:06:26 +01:00