19 lines
479 B
Text
19 lines
479 B
Text
import Init.Lean.Expr
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open Lean
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def tst : IO Unit :=
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do
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let f := mkConst `f;
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let x := Expr.bvar 0;
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let y := Expr.bvar 1;
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let t := Expr.app (Expr.app (Expr.app f x) y) x;
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let a := mkConst `a;
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let b := Expr.app f (mkConst `b);
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IO.println t.dbgToString;
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IO.println (t.instantiate [a, b].toArray).dbgToString;
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IO.println (t.instantiateRev [a, b].toArray).dbgToString;
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IO.println (t.instantiate [a].toArray).dbgToString;
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IO.println (t.instantiate1 a).dbgToString;
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pure ()
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#eval tst
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