lean4-htt/tests/lean/withSetOptionIn.lean
thorimur 182270f8bf
fix: typo in withSetOptionIn (#3806)
When using `withSetOptionIn` on syntax `set_option ... in <command>`,
recurse into command syntax (`stx[2]`) instead of the syntax `in`
(`stx[1]`).

---

Demonstration of `stx[1]` vs. `stx[2]`:
```lean
import Lean

def stx := (Lean.Unhygienic.run `(set_option trace.debug true in #print foo)).raw

#eval stx[1] -- Lean.Syntax.atom (Lean.SourceInfo.none) "in"
#eval stx[2] -- `#print` command syntax
```
2024-04-06 18:00:34 +00:00

39 lines
880 B
Text

import Lean
/-!
# `withSetOptionIn`
This test checks that `withSetOptionIn` recurses into the command syntax (`stx[2]`) in
`set_option ... in <cmd>`.
Prior to #3806, `withSetOptionIn` erroneously recursed into the syntax `in` (`stx[1]`).
-/
open Lean Elab Command
/-- Trace `foo` when `set_option trace.debug true`. -/
elab "#trace_debug_foo" : command => do trace[debug] "foo"
/-- Elab `cmd` using `withSetOptionIn`. -/
elab "#test " cmd:command : command => withSetOptionIn elabCommand cmd
/-! ## Controls
Ensure that `#trace_debug_foo` works as expected.
-/
#guard_msgs in
#trace_debug_foo
/-- info: [debug] foo -/
#guard_msgs in
set_option trace.debug true in #trace_debug_foo
/-! ## Test
Should trace `[debug] foo`, and not log the error "unexpected command 'in'".
-/
/-- info: [debug] foo -/
#guard_msgs in
#test set_option trace.debug true in #trace_debug_foo