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ocaml 3.12.0+dev17, svn revision 10259: revised syntax + new records underscore pattern = syntax error #5024

vicuna opened this issue Apr 11, 2010 · 2 comments


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@vicuna vicuna commented Apr 11, 2010

Original bug ID: 5024
Reporter: Dmitry Grebeniuk
Assigned to: @xclerc
Status: closed (set by @xavierleroy on 2012-09-25T18:06:17Z)
Resolution: fixed
Priority: normal
Severity: minor
Fixed in version: 3.12.1
Category: ~DO NOT USE (was: OCaml general)
Monitored by: @ygrek @hcarty

Bug description

I've downloaded ocaml from svn trunk (revision 10259) and noticed that revised syntax can't handle pattern "_" when matching records:

Objective Caml version 3.12.0+dev17 (2010-01-20)

#load "dynlink.cma";;

#load "camlp4r.cma";;

    Camlp4 Parsing version 3.12.0+dev17 (2010-01-20)

type myrec = { a : int; b : float };

type myrec = { a : int; b : float }

value f { a = a; _ } = a;

Characters 15-16:
value f { a = a; _ } = a;
Error: Parse error: "}" expected after [label_ipatt_list] (in [ipatt])


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@vicuna vicuna commented Apr 12, 2010

Comment author: @alainfrisch

Indeed, none of the new syntactic features in the trunk have been ported to Camlp4 yet.

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@vicuna vicuna commented Jun 1, 2011

Comment author: @damiendoligez

Still present in 3.12.0 and 3.12.1+dev10

@vicuna vicuna closed this Sep 25, 2012
@vicuna vicuna added the bug label Mar 20, 2019
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