9aad86a576
This PR adds support for marking options as deprecated. When a deprecated option is used via `set_option`, a warning is emitted (controlled by `linter.deprecated.options`). An `OptionDeprecation` structure with a required `since` field and an optional `text?` field is added to `OptionDecl`. Each `set_option` elaborator (command, term, tactic, grind) calls `checkDeprecatedOption` to emit warnings. The C++ `register_option` is updated to account for the new field. As a first use, `backward.eqns.nonrecursive` and `backward.eqns.deepRecursiveSplit` are marked deprecated. Continues earlier work done in #11096.
5 lines
97 B
Text
5 lines
97 B
Text
import Lake
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open Lake DSL
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package deprecated_option
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@[default_target] lean_lib DeprecatedOption
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