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Diffstat (limited to 'test-suite/bugs/closed/3746.v')
-rw-r--r-- | test-suite/bugs/closed/3746.v | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/test-suite/bugs/closed/3746.v b/test-suite/bugs/closed/3746.v new file mode 100644 index 00000000..a9463f94 --- /dev/null +++ b/test-suite/bugs/closed/3746.v @@ -0,0 +1,92 @@ + +(* Bug report #3746 : Include and restricted signature *) + +Module Type MT. Parameter p : nat. End MT. +Module Type EMPTY. End EMPTY. +Module Empty. End Empty. + +(* Include of an applied functor with restricted sig : + Used to create axioms (bug report #3746), now forbidden. *) + +Module F (X:EMPTY) : MT. + Definition p := 0. +End F. + +Module InclFunctRestr. + Fail Include F(Empty). +End InclFunctRestr. + +(* A few variants (indirect restricted signature), also forbidden. *) + +Module F1 := F. +Module F2 (X:EMPTY) := F X. + +Module F3a (X:EMPTY). Definition p := 0. End F3a. +Module F3 (X:EMPTY) : MT := F3a X. + +Module InclFunctRestrBis. + Fail Include F1(Empty). + Fail Include F2(Empty). + Fail Include F3(Empty). +End InclFunctRestrBis. + +(* Recommended workaround: manual instance before the include. *) + +Module InclWorkaround. + Module Temp := F(Empty). + Include Temp. +End InclWorkaround. + +Compute InclWorkaround.p. +Print InclWorkaround.p. +Print Assumptions InclWorkaround.p. (* Closed under the global context *) + + + +(* Related situations which are ok, just to check *) + +(* A) Include of non-functor with restricted signature : + creates a proxy to initial stuff *) + +Module M : MT. + Definition p := 0. +End M. + +Module InclNonFunct. + Include M. +End InclNonFunct. + +Definition check : InclNonFunct.p = M.p := eq_refl. +Print Assumptions InclNonFunct.p. (* Closed *) + + +(* B) Include of a module type with opaque content: + The opaque content is "copy-pasted". *) + +Module Type SigOpaque. + Definition p : nat. Proof. exact 0. Qed. +End SigOpaque. + +Module InclSigOpaque. + Include SigOpaque. +End InclSigOpaque. + +Compute InclSigOpaque.p. +Print InclSigOpaque.p. +Print Assumptions InclSigOpaque.p. (* Closed *) + + +(* C) Include of an applied functor with opaque proofs : + opaque proof "copy-pasted" (and substituted). *) + +Module F' (X:EMPTY). + Definition p : nat. Proof. exact 0. Qed. +End F'. + +Module InclFunctOpa. + Include F'(Empty). +End InclFunctOpa. + +Compute InclFunctOpa.p. +Print InclFunctOpa.p. +Print Assumptions InclFunctOpa.p. (* Closed *) |