[FML] Make logging available in constexpr contexts. #162343
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Asking if the logs should be emitted and killing the process (say on unreachable statements) wasn't constexpr. However we managed to use these in constexpr context. As I understand (I am unsure), this was because of https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2448r2.html which is available in C++23. This technique makes the methods constexpr safe.
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No change in functionality. |
chinmaygarde
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Jan 28, 2025
| if (true_arg) { | ||
| KillProcess(); | ||
| } | ||
| #if defined(_MSC_VER) && !defined(__clang__) |
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This could be std::unreachable. But that is C++23 as well.
engine/src/flutter/fml/logging.h
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| // kLogFatal and above is always true. | ||
| bool ShouldCreateLogMessage(LogSeverity severity); | ||
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| constexpr bool ShouldCreateLogMessage2(LogSeverity severity, bool true_arg) { |
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Include Constexpr in the name of these functions so it's clear why the wrappers exist.
jason-simmons
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Asking if the logs should be emitted and killing the process (say on unreachable statements) wasn't constexpr. However we managed to use these in constexpr contexts. As I understand, this was because of https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2448r2.html which is available in C++23. This technique makes the methods constexpr safe in C++17.