[英]How can I use agda2-mode to generate patterns when I expect to see an absurd pattern?
For example, we're proving 2 + 2 != 5
: 例如,我们证明2 + 2 != 5
:
data _+_≡_ : ℕ → ℕ → ℕ → Set where
znn : ∀ {n} → zero + n ≡ n
sns : ∀ {m n k} → m + n ≡ k → suc m + n ≡ suc k
And I can manually prove it: 我可以手动证明这一点:
2+2≠5 : 2 + 2 ≡ 5 → ⊥
2+2≠5 (sns (sns ()))
But I want the pattern (sns (sns ()))
to be generated (just like filling a hole). 但是我希望生成图案(sns (sns ()))
(就像填充孔一样)。 Are there any ways to achieve that? 有什么方法可以实现?
I am using Emacs 25 with agda2-mode. 我正在使用带有agda2模式的Emacs 25。
Ok, so let's say you start from this configuration: 好的,让我们说您从此配置开始:
2+2≠5 : 2 + 2 ≡ 5 → ⊥
2+2≠5 h = {!!}
In this case you can use emacs' keyboard macros because the sub-term generated by matching on h
will also be named h
. 在这种情况下,您可以使用emacs的键盘宏,因为通过匹配h
生成的子项也将被命名为h
。 So using: 因此使用:
<f3>
(start recording the macro) <f3>
(开始记录宏) Cc Cf
(move to the hole) Cc Cf
(移至孔) Cc Cc h RET
(match on h
) Cc Cc h RET
(与h
匹配) <f4>
(record the macro) <f4>
(记录宏) you've recorded the action of "moving to the first goal an matching on h". 您已经记录了“将与h的匹配移到第一个目标”的操作。 You can now keep pressing <f4>
until you reach an absurd case. 现在,您可以一直按<f4>
直到出现荒谬的情况。
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