Two improvements of the latest i128 numbers change #2732
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This macro bases on the static_assert_size macro from the rust compiler. Its advantage is greater compatibility with older rust versions as well as better error messages on a mismatch, as both numbers are printed. The assert macro does not print the mismatching numbers as it only gets the bool from the == comparison.
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r? @Amanieu (rust-highfive has picked a reviewer for you, use r? to override) |
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cc @Gankra |
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TIL! neat! |
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@bors r+ |
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📌 Commit e1d9927 has been approved by |
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Mar 26, 2022
Two improvements of the latest i128 numbers change Two improvements of #2719: * First, a typo/grammar fix * Second, a fix to avoid usage of the anti pattern of `==` inside an `assert` macro. Since a few releases, `assert` is usable inside `const` expressions, but for the purpose of `==`, superior alternatives exist that also work at compile time but print the two values at a mismatch. `assert_eq` is not yet usable in const contexts due to formatting.
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💔 Test failed - checks-cirrus-freebsd-13 |
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looks like a CI error, retry seems appropriate |
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@bors retry |
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☀️ Test successful - checks-actions, checks-cirrus-freebsd-11, checks-cirrus-freebsd-12, checks-cirrus-freebsd-13 |
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Two improvements of #2719:
==inside anassertmacro. Since a few releases,assertis usable insideconstexpressions, but for the purpose of==, superior alternatives exist that also work at compile time but print the two values at a mismatch.assert_eqis not yet usable in const contexts due to formatting.