Improve io::Error::downcast
#149521
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Improve io::Error::downcast
#149521
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Wow, I somehow managed to convince myself that the Given the current situation, removing this box is probably not beneficial indeed. I'll remove the second commit. |
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io::Error: avoid double-boxing of "custom" variant on 32 bits targetsio::Error::downcast: avoid reallocation in case of failure
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io::Error::downcast: avoid reallocation in case of failureio::Error::downcast:
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Improve `io::Error::downcast` Rewrite this function to help to compiler understand what is going on here.
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Rollup of 9 pull requests Successful merges: - #147841 (Fix ICE when applying test macro to crate root) - #149501 (CTFE: avoid emitting a hard error on generic normalization failures) - #149517 (Implement blessing for tidy alphabetical check) - #149521 (Improve `io::Error::downcast`) - #149545 (fix the check for which expressions read never type) - #149549 (Regression test for system register `ttbr0_el2`) - #149579 (Motor OS: fix compile error) - #149595 (Tidying up `tests/ui/issues` tests [2/N]) - #149597 (Revert "implement and test `Iterator::{exactly_one, collect_array}`") r? `@ghost` `@rustbot` modify labels: rollup
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Rollup of 9 pull requests Successful merges: - #147841 (Fix ICE when applying test macro to crate root) - #149501 (CTFE: avoid emitting a hard error on generic normalization failures) - #149517 (Implement blessing for tidy alphabetical check) - #149521 (Improve `io::Error::downcast`) - #149545 (fix the check for which expressions read never type) - #149549 (Regression test for system register `ttbr0_el2`) - #149579 (Motor OS: fix compile error) - #149595 (Tidying up `tests/ui/issues` tests [2/N]) - #149597 (Revert "implement and test `Iterator::{exactly_one, collect_array}`") r? `@ghost` `@rustbot` modify labels: rollup
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Rollup of 10 pull requests Successful merges: - #149521 (Improve `io::Error::downcast`) - #149544 (Only apply `no_mangle_const_items`'s suggestion to plain const items) - #149545 (fix the check for which expressions read never type) - #149570 (rename cortex-ar references to unified aarch32) - #149574 (Batched compiletest Config fixups) - #149579 (Motor OS: fix compile error) - #149595 (Tidying up `tests/ui/issues` tests [2/N]) - #149597 (Revert "implement and test `Iterator::{exactly_one, collect_array}`") - #149608 (Allow PowerPC spe_acc as clobber-only register) - #149610 (Implement benchmarks for uN::{gather,scatter}_bits) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of #149521 - a1phyr:improve_io_error, r=joboet Improve `io::Error::downcast` Rewrite this function to help to compiler understand what is going on here.
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Rollup of 10 pull requests Successful merges: - rust-lang/rust#149521 (Improve `io::Error::downcast`) - rust-lang/rust#149544 (Only apply `no_mangle_const_items`'s suggestion to plain const items) - rust-lang/rust#149545 (fix the check for which expressions read never type) - rust-lang/rust#149570 (rename cortex-ar references to unified aarch32) - rust-lang/rust#149574 (Batched compiletest Config fixups) - rust-lang/rust#149579 (Motor OS: fix compile error) - rust-lang/rust#149595 (Tidying up `tests/ui/issues` tests [2/N]) - rust-lang/rust#149597 (Revert "implement and test `Iterator::{exactly_one, collect_array}`") - rust-lang/rust#149608 (Allow PowerPC spe_acc as clobber-only register) - rust-lang/rust#149610 (Implement benchmarks for uN::{gather,scatter}_bits) r? `@ghost` `@rustbot` modify labels: rollup
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Rewrite this function to help to compiler understand what is going on here.