Parse::RecDescent and dollar sign

unk1911 has asked for the wisdom of the Perl Monks concerning the following question:

i am having a difficulty parsing a dollar sign ($) followed by a decimal value. here's my grammar:


$test = "$5.1";
$grammar = q {
  input: dollar decimal      
  dollar : /\$/  { $item[1] }
  decimal  : /[-+]?(\d+)?\.\d+/    { warn "decimal! $item[1]" }
...
[download]

i keep getting an error during a parse. does anyone see what i am doing wrong? if i replace $ with a % sign in the grammar and $test then everything works but the dollar is giving me a hard time. any help would be greatly appreciated. this sounds like a very trivial problem but i just don't see it.

-- http://unk1911.blogspot.com

Comment on Parse::RecDescent and dollar sign Download Code

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Re: Parse::RecDescent and dollar sign by Fletch (Bishop) on Jun 16, 2005 at 18:51 UTC
It's possible to get P::RD to dump out the generated code into a file (rather than having it generated on the fly each time). You might try this and look at the code generated for your "dollar" rule. `## Turn the grammar in file grammar.txt into MyGrammar.pm $ perl -MParse::RecDescent - grammar.txt MyGrammar` [download] -- We're looking for people in ATL	[reply] [d/l]
Re^2: Parse::RecDescent and dollar sign by unk1911 (Initiate) on Jun 16, 2005 at 18:58 UTC
thanks, i see my problem, it was very dumb. i should have written: `$test = "\$5.11";` [download] -- http://unk1911.blogspot.com	[reply] [d/l]
Re: Parse::RecDescent and dollar sign by ikegami (Patriarch) on Jun 16, 2005 at 19:58 UTC
Use `$grammar = q { dollar : /\\$/ { $item[1] } };` [download] or `$grammar = <<'__END_OF_GRAMMAR__'; dollar : /\$/ { $item[1] } __END_OF_GRAMMAR__` [download]	[reply] [d/l] [select]
Re: Parse::RecDescent and dollar sign by kwaping (Priest) on Jun 16, 2005 at 18:57 UTC
Have you tried matching for the octal value of '$'? `/\044/`	[reply] [d/l]
Re^2: Parse::RecDescent and dollar sign by unk1911 (Initiate) on Jun 16, 2005 at 19:26 UTC
well the thing is there was nothing wrong with my grammar. my test case was wrong, i forgot about the dollar sign. i'm in good shape now , thanks	[reply]