bjoernager/rust
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Support pretty printing of invalid constants

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Make it possible to pretty print invalid constants by introducing a
fallible variant of `destructure_const` and falling back to debug
formatting when it fails.
This commit is contained in:
Tomasz Miąsko 2022-02-15 13:58:34 +01:00
parent bfb2856f27
commit 92d20c4aad
7 changed files with 117 additions and 29 deletions
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4
compiler/rustc_const_eval/src/lib.rs
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@ -41,9 +41,9 @@ pub fn provide(providers: &mut Providers) {
providers.eval_to_const_value_raw = const_eval::eval_to_const_value_raw_provider;
providers.eval_to_allocation_raw = const_eval::eval_to_allocation_raw_provider;
providers.const_caller_location = const_eval::const_caller_location;
providers.destructure_const = |tcx, param_env_and_value| {
providers.try_destructure_const = |tcx, param_env_and_value| {
let (param_env, value) = param_env_and_value.into_parts();
const_eval::destructure_const(tcx, param_env, value)
const_eval::try_destructure_const(tcx, param_env, value).ok()
};
providers.const_to_valtree = |tcx, param_env_and_value| {
let (param_env, raw) = param_env_and_value.into_parts();