23 lines
614 B
Text
23 lines
614 B
Text
open tactic
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#print "------- fapply version ----------"
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example (a : nat) : ∃ x : nat, x = a :=
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by do
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c₁ ← return (expr.const `Exists.intro [level.of_nat 1]),
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fapply c₁, /- fapply adds all unassigned variables -/
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trace_state,
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swap, /- swap witness and ?M = a -/
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a ← get_local `a,
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mk_app `eq.refl [a] >>= exact
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#print "------- apply version ----------"
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example (a : nat) : ∃ x : nat, x = a :=
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by do
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c₁ ← return (expr.const `Exists.intro [level.of_nat 1]),
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/- apply does not add the goal |- nat -/
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apply c₁,
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trace_state,
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a ← get_local `a,
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mk_app `eq.refl [a] >>= exact
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