lean4-htt/tests/lean/run/toExpr.lean
Leonardo de Moura 5ffbada3df feat: add Lean.MonadEnv, Lean.MonadError, and Lean.MonadOptions
This is the first set of polymorphic methods. I will add more later,
and keep reducing code duplication.

cc @Kha
2020-08-22 16:00:43 -07:00

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import Lean
open Lean
unsafe def test {α : Type} [HasToString α] [ToExpr α] [HasBeq α] (a : α) : CoreM Unit := do
env ← getEnv;
let auxName := `_toExpr._test;
let decl := Declaration.defnDecl {
name := auxName,
lparams := [],
value := toExpr a,
type := toTypeExpr α,
hints := ReducibilityHints.abbrev,
isUnsafe := false
};
IO.println (toExpr a);
match env.addAndCompile {} decl with
| Except.error _ => throwError "addDecl failed"
| Except.ok env => do
match env.evalConst α auxName with
| Except.error ex => throwError ex
| Except.ok b => do
IO.println b;
unless (a == b) $
throwError "toExpr failed";
pure ()
#eval test #[(1, 2), (3, 4)]
#eval test ['a', 'b', 'c']
#eval test ("hello", true)
#eval test ((), 10)