make it possible for outside crates to inspect a mir::ConstValue with the interpreter #121396
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@bors r+ rollup |
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Rollup of 8 pull requests Successful merges: - rust-lang#121044 (Support async trait bounds in macros) - rust-lang#121175 (match lowering: test one or pattern at a time) - rust-lang#121340 (bootstrap: apply most of clippy's suggestions) - rust-lang#121347 (compiletest: support auxiliaries with auxiliaries) - rust-lang#121359 (miscellaneous type system improvements) - rust-lang#121366 (Remove `diagnostic_builder.rs`) - rust-lang#121379 (Remove an `unchecked_error_guaranteed` call.) - rust-lang#121396 (make it possible for outside crates to inspect a mir::ConstValue with the interpreter) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#121396 - RalfJung:mir-const-value-inspect, r=oli-obk make it possible for outside crates to inspect a mir::ConstValue with the interpreter For MiniRust we need to convert MIR constant values into MiniRust constant values. However, it's not currently possible to get nice high-level access to the inerts of a `ConstValue`: we can access the raw contents (the allocation / `ScalarInt`), but if it is e.g. of enum type and we want to determine which variant is encoded, we are stuck. There's only `try_destructure_mir_constant_for_user_output` which is meant for diagnostics, so it doesn't fit. The interpreter has all the APIs to traverse such a value, so we just need a way to get such a ConstValue into an interpreter instance. This adds the public functions necessary to make that happen.
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For MiniRust we need to convert MIR constant values into MiniRust constant values. However, it's not currently possible to get nice high-level access to the inerts of a
ConstValue: we can access the raw contents (the allocation /ScalarInt), but if it is e.g. of enum type and we want to determine which variant is encoded, we are stuck. There's onlytry_destructure_mir_constant_for_user_outputwhich is meant for diagnostics, so it doesn't fit.The interpreter has all the APIs to traverse such a value, so we just need a way to get such a ConstValue into an interpreter instance. This adds the public functions necessary to make that happen.