aniva/Pantograph
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Pantograph
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Merge branch 'dev' into goal/print

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Leni Aniva 2024-12-11 16:51:58 -08:00
parent 2f732a7f20 b9c114fe21
commit 0fa57a5a15
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2
Pantograph/Version.lean
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@ -1,6 +1,6 @@
namespace Pantograph namespace Pantograph
@[export pantograph_version] @[export pantograph_version]
def version := "0.2.22" def version := "0.2.23"
end Pantograph end Pantograph

17
doc/rationale.md
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@ -24,7 +24,7 @@ The name Pantograph is a pun. It means two things
a locomotive. In comparison the (relatively) simple Pantograph software powers a locomotive. In comparison the (relatively) simple Pantograph software powers
theorem proving projects. theorem proving projects.
## Caveats ## Caveats and Limitations
Pantograph does not exactly mimic Lean LSP's behaviour. That would not grant the Pantograph does not exactly mimic Lean LSP's behaviour. That would not grant the
flexibility it offers. To support tree search means Pantograph has to act flexibility it offers. To support tree search means Pantograph has to act
@ -38,7 +38,20 @@ differently from Lean in some times, but never at the sacrifice of soundness.
it is supposed to finish at the end of a `by` block. Pantograph will raise the it is supposed to finish at the end of a `by` block. Pantograph will raise the
error in this case, since it indicates the termination of a proof search branch. error in this case, since it indicates the termination of a proof search branch.
- `pick_goal` or `swap` will not work since they run contrary to tree search - `pick_goal` or `swap` will not work since they run contrary to tree search
paradigms. paradigms. However, if there are tactics which perform non-trivial operations
to multiple goals at the same time, this constrain could potentially be
relaxed at a cost of great bookkeeping overhead to the user.
Pantograph cannot perform things that are inherently constrained by Lean. These
include:
- If a tactic loses track of metavariables, it will not be caught until the end
of the proof search. This is a bug in the tactic itself.
- Timeouts for executing tactics is not available. Maybe this will change in the
future.
- Interceptions of parsing errors generally cannot be turned into goals (e.g.
`def mystery : Nat := :=`) due to Lean's parsing system.
## References ## References