Typos in STLC typing rules
chrisbarrett opened this issue · comments
Really enjoying this, thanks for the hard work!
There's a typo in the lambda typing rule in Ch04 for the simply-typed LC. The types and the terms have been mixed up in the implication.
It reads
Γ, x : τ1 ⊢ e : τ2
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Γ ⊢ λx.τ2 : e1→e2
You probably meant
...
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Γ ⊢ λx.e : τ1→τ2