d7ab5cd8a1
@kha @gebner I added the `show_goal` tactic for selecting arbitrary subgoals. This feature is similar to the one available in Isabelle. This commit allows us to use the `show` keyword as syntax sugar for `show_goal`. The test `show_goal.lean` has a small example. What do you think? @Armael: you can use `show` to structure your proofs in tactic mode. See `tests/lean/run/show_goal.lean` for a small example.
10 lines
182 B
Text
10 lines
182 B
Text
section
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variables (r : ℕ → ℕ → Prop)
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local infix `≼` : 50 := r
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example {a b : ℕ} : a ≼ b → true :=
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begin
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show a ≼ b → true,
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{intro x, tactic.triv}
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end
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end
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