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Printer does not agree with parser for anonymous type parameters in type definitions in revised syntax #5637

vicuna opened this issue Jun 6, 2012 · 4 comments


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@vicuna vicuna commented Jun 6, 2012

Original bug ID: 5637
Reporter: @garrigue
Assigned to: @xclerc
Status: closed (set by @xavierleroy on 2015-12-11T18:07:07Z)
Resolution: fixed
Priority: normal
Severity: minor
Version: 4.00.0+dev
Target version: 4.00.0+dev
Fixed in version: 4.00.0+dev
Category: -for Camlp4 use

Bug description

The following phrase

type t _ = [ Int : t int ];

is accepted by camlp4r, but the resulting signature is output as

type t '_ = [ Int: t int ]

which cannot be parsed.

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@vicuna vicuna commented Jun 28, 2012

Comment author: @damiendoligez

I cannot reproduce this, either with the dev or the beta:
command line:
camlp4r -printer Camlp4OCamlRevisedPrinter /tmp/
type t _ = [ Int : t int ];

Was this bug fixed inbetween, or do you use different options?

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@vicuna vicuna commented Jun 28, 2012

Comment author: @garrigue

I'm using
ocaml dynlink.cma camlp4r.cma

The bug is still there (both trunk and 4.00).
But indeed there is no problem when using the camlp4r command instead of the toplevel.

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@vicuna vicuna commented Jun 28, 2012

Comment author: @bobzhang

I tried this problem before. It was reproduced using toplevel. As doligez said that it did not appear when using command line.

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@vicuna vicuna commented Jul 9, 2012

Comment author: @xclerc

Everyone was right: it just happen that there are two different printers
depending whether you are inside or outside of the toplevel.

Fixed in trunk (revision 12668) and 4.00 (revision 12669) branches.

@vicuna vicuna closed this Dec 11, 2015
@vicuna vicuna added the camlp4 label Mar 14, 2019
@vicuna vicuna added this to the 4.00.0 milestone Mar 14, 2019
@vicuna vicuna added the bug label Mar 20, 2019
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