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Proofgold Proof
pf
Let x0 of type
ι
be given.
Assume H0:
Field
x0
.
Apply H0 with
x0
=
pack_b_b_e_e
(
field0
x0
)
(
field1b
x0
)
(
field2b
x0
)
(
field3
x0
)
(
field4
x0
)
.
Assume H1:
struct_b_b_e_e
x0
.
Assume H2:
unpack_b_b_e_e_o
x0
(
λ x1 .
λ x2 x3 :
ι →
ι → ι
.
λ x4 x5 .
explicit_Field
x1
x4
x5
x2
x3
)
.
Apply struct_b_b_e_e_eta with
x0
.
The subproof is completed by applying H1.
■