From: Charly <carl.weierstrass@googlemail.com>
Subject: question about the usage of opentoken-4.0b
Date: Tue, 24 Apr 2012 12:01:18 -0700 (PDT)
Date: 2012-04-24T12:01:18-07:00 [thread overview]
Message-ID: <10328658.73.1335294078629.JavaMail.geo-discussion-forums@vber6> (raw)
Hi,
I have a question about the usage of opentoken-4.0b, a scanner/parser-library written in Ada.
So my question isn't about the language Ada itself but only about this library.
I define a Grammar starting with
Grammar : constant Production_List.Instance :=
Prog <= Def_List & EOF + Program_Token.Create and
Def_List <= Def_List & Ent + Element_List.Concat and
Def_List <= Ent + Element_List.Create and
Ent <= Entity_Key & Ident & Colon & El_List & End_Key & Semicolon + Entity_Token.Create and
...
and I create and call the parser with
Text_Parser := LALR_Parser.Generate (Grammar, Analyzer, False);
LALR_Parser.Parse (Text_Parser);
It works fine, but to use the result of the parsing, which happens to be the start element
'Prog' of the above Grammar, I had to store it in an global variable,
as one of the actions of the procedure 'Program_Token.Create'.
But I would like to avoid this, because I don't like global variables;
The variable 'Prog' in the Grammar definition has the right type, but does not contain any data, as I expected.
Any help would be appreciated.
Sincerely
Charly
next reply other threads:[~2012-04-24 19:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-24 19:01 Charly [this message]
2012-04-25 12:03 ` question about the usage of opentoken-4.0b Stephen Leake
2012-04-25 19:27 ` Charly
2012-04-25 12:58 ` Marc C
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox