lean4-htt/tests/lean/run/4278.lean
2025-07-15 23:56:49 +00:00

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-- Type has trivial structure, so `u64` representation is expected.
structure Unboxed where val : UInt64
structure S where
unboxed : Unboxed
unused : Bool
/--
trace: [Compiler.IR] [result]
def get_unboxed (x_1 : obj) : u64 :=
let x_2 : u64 := sproj[0, 0] x_1;
dec x_1;
ret x_2
def get_unboxed._boxed (x_1 : obj) : tobj :=
let x_2 : u64 := get_unboxed x_1;
let x_3 : tobj := box x_2;
ret x_3
-/
#guard_msgs in
set_option trace.compiler.ir.result true in
@[export get_unboxed]
def get_unboxed (s : S) : UInt64 := s.unboxed.val