26 lines
780 B
Plaintext
26 lines
780 B
Plaintext
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import Lean
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def strToName (s: String): Lean.Name :=
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(s.splitOn ".").foldl Lean.Name.str Lean.Name.anonymous
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unsafe def main (args: List String): IO Unit := do
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Lean.enableInitializersExecution
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Lean.initSearchPath (← Lean.findSysroot)
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let imports := ["Init"]
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let env: Lean.Environment ← Lean.importModules
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(imports := imports.map (λ str => { module := strToName str, runtimeOnly := false }))
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(opts := {})
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(trustLevel := 1)
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let expr := args.head?.getD "a + b"
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match Lean.Parser.runParserCategory
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(env := env)
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(catName := `term)
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(input := expr)
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(fileName := "<stdin>") with
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| Except.error error => IO.println s!"{error}"
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| Except.ok (syn: Lean.Syntax) =>
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let reprint := Lean.Syntax.reprint syn |>.get!
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IO.println reprint
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