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[core.builtins] Improve docs for trap, likely, unlikely (#17491)

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Based on: https://github.com/dlang/dmd/edit/master/changelog/druntime.expect-trap.dd
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Nick Treleaven 2024-12-08 06:32:57 +00:00 • committed by GitHub
parent 06e8c8d3dd
commit 2674d225aa
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1 changed files with 5 additions and 2 deletions
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7
druntime/src/core/builtins.d
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@ -78,6 +78,8 @@ else version (DigitalMars)
return val; return val;
} }
/// Execute target dependent trap instruction, if supported.
/// Otherwise, abort execution.
pragma(inline, true) pragma(inline, true)
void trap() void trap()
{ {
@ -90,7 +92,8 @@ else version (DigitalMars)
} }
} }
/// Provide static branch hints /// Provide static branch and value hints for the LDC/GDC compilers.
/// DMD ignores these hints.
pragma(inline, true) bool likely(bool b) { return expect(b, true); } pragma(inline, true) bool likely(bool b) { return expect(b, true); }
/// /// ditto
pragma(inline, true) bool unlikely(bool b) { return expect(b, false); } pragma(inline, true) bool unlikely(bool b) { return expect(b, false); }