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Typo in MetaM chapter: the signature of Lean.commitIfNoEx is wrong #140

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spinylobster opened this issue Jun 11, 2024 · 0 comments · Fixed by #152
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Typo in MetaM chapter: the signature of Lean.commitIfNoEx is wrong #140

spinylobster opened this issue Jun 11, 2024 · 0 comments · Fixed by #152

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@spinylobster
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in https://leanprover-community.github.io/lean4-metaprogramming-book/main/04_metam.html#backtracking ,

Lean.commitIfNoEx (x : α) : m α executes x. If x succeeds, commitIfNoEx returns its result. If x throws an exception, commitIfNoEx backtracks the state and rethrows the exception.

the actual signature is Lean.commitIfNoEx (x : m α) : m α.
Seasawher added a commit to Seasawher/lean4-metaprogramming-book that referenced this issue Dec 25, 2024
@Seasawher
fix typo in MetaM chapter
693ebfe 
solve leanprover-community#140
@Seasawher Seasawher mentioned this issue Dec 25, 2024
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fix typos and update CI Seasawher/lean4-metaprogramming-book
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@spinylobster