e4a3b434d7
@Kha The transition has begun :) I found and fixed a few bugs, but it is going well so far.
51 lines
1.9 KiB
Text
51 lines
1.9 KiB
Text
/-! Reprint file after removing all parentheses and then passing it through the parenthesizer -/
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import Lean.Parser
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new_frontend
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open Lean
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open Lean.Format
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def unparenAux (parens body : Syntax) : Syntax :=
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match parens.getHeadInfo, body.getHeadInfo, body.getTailInfo, parens.getTailInfo with
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| some bi', some bi, some ti, some ti' => (body.setHeadInfo { bi with leading := bi'.leading }).setTailInfo { ti with trailing := ti'.trailing }
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| _, _, _, _ => body
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partial def unparen : Syntax → Syntax
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-- don't remove parentheses in syntax quotations, they might be semantically significant
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| stx => if stx.isOfKind `Lean.Parser.Term.stxQuot then stx
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else match_syntax stx with
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| `(($stx')) => unparenAux stx $ unparen stx'
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| `(level|($stx')) => unparenAux stx $ unparen stx'
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| _ => stx.modifyArgs $ Array.map unparen
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unsafe def main (args : List String) : IO Unit := do
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let (debug, f) : Bool × String := match args with
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| [f, "-d"] => (true, f)
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| [f] => (false, f)
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| _ => panic! "usage: file [-d]";
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env ← mkEmptyEnvironment;
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stx ← Lean.Parser.parseFile env args.head!;
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let header := stx.getArg 0;
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some s ← pure header.reprint | throw $ IO.userError "header reprint failed";
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IO.print s;
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let cmds := (stx.getArg 1).getArgs;
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cmds.forM $ fun cmd => do
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let cmd := unparen cmd;
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(cmd, _) ← (finally (PrettyPrinter.parenthesizeCommand cmd) printTraces).toIO { options := Options.empty.setBool `trace.PrettyPrinter.parenthesize debug } { env := env };
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some s ← pure cmd.reprint | throw $ IO.userError "cmd reprint failed";
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IO.print s
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#eval main ["../../../src/Init/Core.lean"]
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def check (stx : Syntax) : CoreM Unit := do
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let stx' := unparen stx;
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stx' ← PrettyPrinter.parenthesizeTerm stx';
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f ← PrettyPrinter.formatTerm stx';
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IO.println f;
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when (stx != stx') $
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throwError "reparenthesization failed"
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open Lean
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syntax:80 term " ^~ " term:80 : term
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syntax:70 term " *~ " term:71 : term
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#eval check $ Unhygienic.run `(((1 + 2) *~ 3) ^~ 4)
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