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doc(runtime-c-api) Explain why code is unreachable in wasmer_trap.

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Ivan Enderlin
2020-01-15 08:40:36 +01:00
parent c0b439e66a
commit 4cdf868a0b
1 changed files with 6 additions and 0 deletions
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6
lib/runtime-c-api/src/import/mod.rs
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@ -725,6 +725,12 @@ pub unsafe extern "C" fn wasmer_trap(
.runnable_module
.do_early_trap(Box::new(error_message)); // never returns
// cbindgen does not generate a binding for a function that
// returns `!`. Since we also need to error in some cases, the
// output type of `wasmer_trap` is `wasmer_result_t`. But the OK
// case is not reachable because `do_early_trap` never
// returns. That's a compromise to satisfy the Rust type system,
// cbindgen, and get an acceptable clean code.
#[allow(unreachable_code)]
wasmer_result_t::WASMER_OK
}